CN105826652B - A kind of antenna assembly and mobile terminal of mobile terminal - Google Patents

Abstract

The present invention provides an antenna device for a mobile terminal and the mobile terminal. The antenna device includes: a first antenna radiator, including a symmetrical first antenna radiator branch and a second antenna radiator branch; a feed-in device; an antenna feed source, respectively connected to the feed-in device and the mainboard ground of the mobile terminal; the first switch module is respectively connected to the first antenna radiator branch and the mainboard ground; the second switch module is symmetrical to the first switch module, and the second switch module is respectively connected to the first The two antenna radiator branches are connected to the ground of the main board; the controller is connected to the first switch module and the second switch module respectively, and the controller controls the first switch module to close, the second switch module to switch to the floating end, or controls the first switch module switch to the floating terminal, and the second switch module is closed. The invention only needs one antenna feed point and two switches to realize the function of balancing the left and right head and hand models, has low cost, and the switch loss and head and hand model absorption are small, and can solve the problem of "death grip".

Description

Antenna device of a mobile terminal and mobile terminal

technical field

The present invention relates to the technical field of mobile terminals, in particular to an antenna device for a mobile terminal and a mobile terminal.

Background technique

In recent years, with the popularity of mobile terminals with a metal appearance, the antennas of mobile terminals often need to be realized with metal parts, which significantly increases the impact of the head and hands on the antenna. Adding heads and/or hands will not only make the resonant frequency of the antenna A large offset will lead to serious mismatch, and will also significantly increase the absorption loss of the antenna, and the antenna is very likely to have a "death grip" problem. "Death grip" refers to the situation where the mobile terminal signal rapidly fades after holding the antenna.

At present, major operators and mobile terminal manufacturers attach great importance to the wireless performance of mobile terminals under the head-and-hand model, and put forward specific requirements for the wireless performance of the left and right head-hand models. However, how to balance the difference in wireless performance between the left and right hand models is still a difficult issue in the industry.

In the traditional antenna solution, the antenna feed point is located on one side of the motherboard, resulting in a difference in the performance of the left and right head and hands. In general, the performance difference between the left and right head and hands of the antenna of this solution often exceeds 3dB, and can reach 10dB in severe cases.

In the related art, as shown in FIG. 1 , an improvement scheme is proposed for the traditional antenna scheme. In this scheme, the same antenna radiator switches the antenna feed points on both sides (the first feed point 41', the second feed point 42 '), so as to balance the performance difference between the left and right head and hand models, and improve the poor performance of the hand model on one side of the traditional antenna.

However, the improvement scheme in the related art also has the following defects:

Since the double feed point (the first feed point 41', the second feed point 42') is used for feeding, it is necessary to add three additional switches (the first switch 1', the second switch 2', the third switch 3') and two Matching circuits with similar circuits (the first matching circuit and the second matching circuit) not only increase the cost, but also increase the difficulty of implementation and debugging. At the same time, it will also bring a large switching loss. First, the number of switches increases, resulting in an increase in switching loss; second, the switch is directly connected in series at the antenna feed point, and then connected in series with the matching circuit, resulting in a significant increase in switch loss. This is because it can be known from the current distribution law of the antenna that the current near the feed point of the antenna is the largest (the current at the end of the antenna is the smallest), and the loss is large.

Contents of the invention

In view of the above problems, the purpose of the embodiments of the present invention is to provide an antenna device for a mobile terminal and a corresponding mobile terminal to solve the problem of high cost, difficulty in implementation and debugging, and large switching loss in the improvement scheme in the related art. question.

In order to solve the above problems, an embodiment of the present invention discloses an antenna device for a mobile terminal, including: a first antenna radiator, the first antenna radiator includes symmetrical first antenna radiator branches and second antenna radiator branches ; Feed-in device, the feed-in device is a wire connected to the first antenna radiator, or the feed-in device is coupled with the first antenna radiator slot; Antenna feed, the antenna feed respectively It is connected with the feed-in device and the mainboard ground of the mobile terminal; the first switch module is connected with the first antenna radiator branch and the mainboard ground respectively; the second switch module is connected with the first antenna radiator branch and the mainboard ground; The second switch module is symmetrical to the first switch module, and the second switch module is respectively connected to the second antenna radiator branch and the main board ground; the controller is connected to the first switch module respectively connected to the second switch module, the controller controls the first switch module to close, the second switch module switches to the floating end, or controls the first switch module to switch to the floating end, the second The switch module is closed.

In order to solve the above problems, the embodiment of the present invention also discloses a mobile terminal, including a main board ground and the antenna device of the mobile terminal, and the antenna device of the mobile terminal is connected to the main board ground.

The embodiment of the present invention has the following advantages: the feed-in device is provided with the gap coupling of the first antenna radiator, or the feed-in device is a wire connected to the first antenna radiator, and the antenna feed source is connected to the feed-in device and the mainboard ground of the mobile terminal respectively. The first switch module is connected to the first antenna radiator branch of the first antenna radiator and the main board ground respectively, the second switch module is symmetrical to the first switch module, and the second switch module is respectively connected to the second antenna radiator branch and the main board connected to the ground, and then the controller controls the first switch module to close and the second switch module to switch to the floating terminal, or controls the first switch module to switch to the floating terminal and the second switch module to close. Therefore, only one antenna feed point (between the antenna feed source and the first antenna radiator) and two switches are needed to achieve balanced left and right head-hand mode functions, with low cost and reduced switching loss and head-hand mode absorption , which reduces the difficulty of design and debugging, and can solve the problem of "death grip".

Description of drawings

Fig. 1 is a structural schematic diagram of an improved solution in the related art;

Fig. 2 is a structural block diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of an antenna standing wave of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 7 is a schematic diagram of the shift direction of the antenna frequency of the antenna device of the mobile terminal according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of the shift direction of the antenna frequency of the antenna device of the mobile terminal according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of the shift direction of the antenna frequency of the antenna device of the mobile terminal according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 13 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 15 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 16 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 17 is a schematic diagram of the shift direction of the antenna frequency of the antenna device of the mobile terminal according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of an antenna device of a mobile terminal according to another embodiment of the present invention;

FIG. 19 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

FIG. 20 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 21 is a schematic diagram of an antenna standing wave of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 22 is a schematic structural diagram of an antenna device of a mobile terminal according to a specific embodiment of the present invention;

Fig. 23 is a schematic diagram of a data curve of an antenna device of a mobile terminal according to a specific embodiment of the present invention;

Fig. 24 is a schematic diagram of a data curve of an antenna device of a mobile terminal according to another specific embodiment of the present invention;

Fig. 25 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 26 is a schematic structural diagram of an antenna device of a mobile terminal according to an embodiment of the present invention;

Fig. 27 is a schematic diagram of the shift direction of the antenna frequency of the antenna device of the mobile terminal according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

The present invention proposes based on following discovery and research of inventor:

The improvement scheme in the related technology, the core idea is to change the position of the antenna feed point, thereby improving the performance of the left and right head and hand models. Although changing the position of the antenna feed point can improve the performance of the left and right head and hand models, changing the position of the antenna end can also Improve the performance of the left and right hand models, and the improvement effect is more obvious.

Further research found that the "death grip" problem is mainly caused when the thumb side of the hand is close to a certain side of the gap in the mobile terminal (usually the end of the antenna), so if the position of the end of the antenna can be changed, the "grip of death" problem can be solved. Death Grips" issue.

Therefore, one of the core concepts of the embodiments of the present invention is to change the position of the antenna end by switching different parts of the antenna radiator, thereby improving the performance of the left and right head and hand models, and solving the problem of "death grip".

Referring to FIG. 2 , it shows a structural block diagram of an antenna device 10 of a mobile terminal according to an embodiment of the present invention, which may specifically include the following modules: a first antenna radiator 1, an antenna feed 2, a first switch module 3, and a second switch module 4. Controller 5 and feed-in device 6 . Wherein, the first antenna radiator 1 includes a symmetrical first antenna radiator branch 11 and a second antenna radiator branch 12, and the first antenna radiator branch 11 and the second antenna radiator branch 12 may be left-right symmetrical with respect to the mobile terminal, At this time, the first antenna radiator branch 11 can be set on the left side of the mobile terminal, and the second antenna radiator branch 12 can be set on the right side of the mobile terminal, wherein the mobile terminal can be a mobile phone, a navigator, a palmtop computer, etc. The feed-in device 6 is a wire connected to the first antenna radiator 1 , or the feed-in device 6 is slot-coupled with the first antenna radiator 1 . The antenna feed 2 is respectively connected to the feed-in device 6 and the main board ground 20 of the mobile terminal. At this time, the antenna feed point is between the antenna feed 2 and the feed-in device 6 . The first switch module 3 is respectively connected to the first antenna radiator branch 11 and the main board ground 20 . The second switch module 4 is symmetrical to the first switch module 3 , and the second switch module 4 is respectively connected to the second antenna radiator branch 12 and the main board ground 20 . The controller 5 is connected to the first switch module 3 and the second switch module 4 respectively, and the controller 5 controls the first switch module 3 to close, the second switch module 4 to switch to the floating terminal, or controls the first switch module 3 to switch to the floating terminal , the second switch module 4 is closed.

Wherein, the controller 5 can control the first switch module 3 to close and the second switch module 4 to switch to the floating terminal by detecting the signal strength received by the antenna device 10, or control the first switch module 3 to switch to the floating terminal, and the second switch module 4 closed.

It should be noted that the shapes of the first antenna radiator branch 11 and the second antenna radiator branch 12 can be flexible and changeable, such as PIFA (Planar Inverted F-shaped Antenna, planar inverted F-shaped antenna) antenna, IFA (Inverted F-shaped Antenna (inverted F-shaped antenna) antenna, Monopole (monopole) antenna or LOOP (loop) antenna, etc., can also be a multi-resonant structure such as G-type or F-type. In addition, it should be noted that the antenna device 10 of the mobile terminal in the embodiment of the present invention is not only suitable for mobile terminals with conventional plastic casings, but also suitable for moving metal casings such as metal frame casings, all-metal casings, or metal battery cover casings on the back. terminals and other mobile terminals with casings.

Preferably, in one embodiment of the present invention, the first switch module 3 may include a first single-pole multi-throw switch 31 such as a single-pole three-throw switch, a first filter circuit 32 and a second filter circuit 33, and the second switch module 4 includes The second single-pole multi-throw switch 41 is, for example, a single-pole three-throw switch, a third filter circuit 42 and a fourth filter circuit 43 . Wherein, the common end of the first single-pole multi-throw switch 31 is connected with the first antenna radiator branch 11, the first switching end of the first single-pole multi-throw switch 31 is suspended, and the control end of the first single-pole multi-throw switch 31 is connected with the controller 5 connected. The first filtering circuit 32 is respectively connected to the second switching terminal of the first SPMT switch 31 and the main board ground 20 . The second filter circuit 33 is respectively connected to the third switching end of the first SPMT switch 31 and the main board ground 20 . The common terminal of the second SPMT switch 41 is connected to the second antenna radiator branch 12 , the first switching terminal of the second SPMT switch 41 is suspended, and the control terminal of the second SPMT switch 41 is connected to the controller 5 . The third filter circuit 42 is respectively connected to the second switching terminal of the second SPMT switch 41 and the main board ground 20 . The fourth filtering circuit 43 is respectively connected to the third switching end of the second SPMT switch 41 and the main board ground 20 . Wherein, when the first SPMT switch 31 is a SP3T switch and the second SPMT switch 41 is a SP3T switch, the antenna device 10 of the mobile terminal is shown in FIG. 3 . The controller 5 is not shown in FIG. 3 .

It should be noted that the filter circuit in the embodiment of the present invention can be a single component, such as an inductor or a capacitor, or a complex structure, such as a frequency gating circuit, or other circuits with similar functions. List them all. Wherein, the frequency gating circuit can be equivalent to a short circuit in the low frequency band, and can be equivalent to an inductor or a capacitor in the high frequency band. In addition, the filtering circuit in the embodiment of the present invention can be replaced by a matching circuit.

Wherein, in one embodiment of the present invention, the first filter circuit 32 and the third filter circuit 42 can be direct circuits, the second filter circuit 33 and the fourth filter circuit 43 can be inductors or capacitors, or the first filter circuit 32 and the third filtering circuit 42 can be the first frequency gating circuit M1, the second filtering circuit 33 and the fourth filtering circuit 43 can be the second frequency gating circuit M2, the first frequency gating circuit M1 and the second frequency gating circuit The pass circuit M2 is different. It should be noted that the first filter circuit 32 and the third filter circuit 42 may also be inductors or capacitors, and the second filter circuit 33 and the fourth filter circuit 43 may also be direct circuits.

Wherein, referring to Fig. 4, in one embodiment of the present invention, the antenna device 10 of the mobile terminal is placed on the lower end of the mobile terminal, the first filter circuit 32 is a straight-through circuit, and the controller 5 controls the common end of the first single-pole multi-throw switch 31 Switch to the second switching end of the first single-pole multi-throw switch 31, that is, control the common end of the first single-pole multi-throw switch 31 to be connected to the second switching end of the first single-pole multi-throw switch 31, and the first switch module 3 is directly connected. The common end of the second single-pole multi-throw switch 41 is controlled to be switched to the first switching end of the second single-pole multi-throw switch 41 , and the second switch module 4 is suspended. At this time, the energy transmitted by the radio frequency signal generated by the antenna feed 2 to the first antenna radiator branch 11 is short-circuited, and the energy transmission direction is shown by arrow S in Figure 4, and the radio frequency signal will be transmitted to the second antenna radiator branch 12. Energy is radiated through the second antenna radiator branch 12 , and the end of the antenna is also on the side of the second antenna radiator branch 12 , and the energy transmission direction is shown by arrow T in FIG. 4 . At this time, the performance of the corresponding left hand model is good, the frequency deviation is less, and the problem of "death grip" is solved. The controller 5 is not shown in FIG. 4 .

Similarly, in another embodiment of the present invention, the antenna device 10 of the mobile terminal is placed at the lower end of the mobile terminal, the third filter circuit 42 is a direct circuit, and the controller 5 controls the common end of the first single-pole multi-throw switch 31 to switch to The first switching end of the first single-pole multi-throw switch 31, the first switch module 3 is suspended, and simultaneously controls the common end of the second single-pole multi-throw switch 41 to switch to the second switching end of the second single-pole multi-throw switch 41, the second switch Module 4 thru. At this time, the energy transmitted by the radio frequency signal generated by the antenna feed source 2 to the second antenna radiator branch 12 is short-circuited, and the radio frequency signal will be transmitted to the first antenna radiator branch 11, and radiate energy through the first antenna radiator branch 11, The antenna end is also on the side of the first antenna radiator branch 11 . At this time, the performance of the corresponding right hand model is good, the frequency deviation is less, and the problem of "death grip" is solved.

Further, in one embodiment of the present invention, when the first filter circuit 32 and the third filter circuit 42 are the first frequency gating circuit M1, the antenna device 10 of the mobile terminal can simultaneously generate high frequency and low frequency Resonant frequency, and at the two resonant frequencies, the antenna device 10 of the mobile terminal has balanced left and right head-hand model characteristics.

For example, referring to FIG. 5, when the controller 5 controls the common end of the first single-pole multi-throw switch 31 to switch to the second switching end of the first single-pole multi-throw switch 31, simultaneously controls the common end of the second single-pole multi-throw switch 41 to switch to The first switching end of the second single-pole multi-throw switch 41, the first filter circuit 32 is equivalent to a short circuit in the low frequency band, and is equivalent to an inductance in the high frequency band, then the low frequency radio frequency signal generated by the antenna feed 2 will go to the second The two antenna radiator branches 12 are transmitted, and the high-frequency radio frequency signal will resonate on the first antenna radiator branch 11 due to the inductance of the first filter circuit 32, so that the low-frequency radio frequency signal passes through the second antenna radiator branch 12 radiates energy, and the energy transmission direction is shown by the arrow L in FIG. 5 . The high-frequency radio frequency signal mainly radiates energy through the first antenna radiator branch 11, and the energy transmission direction is shown by the arrow H in FIG. 5 . At this time, the performance of the head and hand model corresponding to A (for distinguishing between left and right hands) is good in the low frequency band, and it is likely that the performance of the head and hand model for B (for distinguishing between left and right hands) is good in the high frequency band. When the antenna device 10 of the mobile terminal is placed at the lower end of the mobile terminal , A is left and B is right. The corresponding standing wave of the antenna is shown in FIG. 6 , where f1 is the resonant frequency of the antenna in the low frequency band, and f2 is the resonant frequency of the antenna in the high frequency band. The controller 5 is not shown in FIG. 5 .

Similarly, when the controller 5 controls the common end of the first single-pole multi-throw switch 31 to switch to the first switching end of the first single-pole multi-throw switch 31, it also controls the common end of the second single-pole multi-throw switch 41 to switch to the second single-pole multi-throw switch. The second switching end of the multi-throw switch 41, the third filter circuit 42 is equivalent to a short circuit in the low frequency band, and is equivalent to an inductance in the high frequency band, then the low frequency radio frequency signal will be transmitted to the first antenna radiator branch 11, and the high frequency band will be transmitted to the first antenna radiator branch 11. Due to the inductance of the third filter circuit 42, the radio frequency signal with a high frequency will resonate on the second antenna radiator branch 12, so that the low frequency radio frequency signal radiates energy through the first antenna radiator branch 11, and the high frequency radio frequency signal mainly Energy is radiated via the second antenna radiator branch 12 . At this time, the performance of the hand model corresponding to the B head is good in the low frequency band, and it is likely that the performance of the hand model of the A head is good in the high frequency band.

Specifically, when in the antenna device 10 of the mobile terminal shown in FIG. 3 , the first filter circuit 32 and the third filter circuit 42 are direct circuits, and the second filter circuit 33 and the fourth filter circuit 43 are inductors or capacitors, the control The device 5 controls the common end of the first single-pole multi-throw switch 31 to switch between the second switch end and the third switch end of the first single-pole multi-throw switch 31, or controls the common end of the second single-pole multi-throw switch 41 to switch between the second The second switch terminal and the third switch terminal of the single-pole multi-throw switch 41 are switched, and the shift direction of the antenna frequency corresponding to the switch can be as shown by the arrow in FIG. 7 . Therefore, the frequency of the antenna can be shifted, and the antenna has a frequency tunable characteristic, which further expands the bandwidth of the antenna. In this case, the antenna device 10 of the mobile terminal also has a characteristic of balanced left and right head-hand modes. Wherein, the principle of balancing the left and right head and hand models is the same as the principle of balancing the left and right head and hand models of the antenna device 10 of the mobile terminal shown in FIG. 4 and FIG. 5 , and will not be repeated below. FIG. 8 is a schematic diagram of the antenna device 10 of the mobile terminal when the head-hand state of the mobile terminal is the left head and/or left-hand state, and the controller 5 is not shown in FIG. 8 . At this time, the controller 5 controls the common end of the first SPMT switch 31 to switch between the second switching end and the third switching end of the first SPMT switch 31, and controls the common end of the second SPMT switch 41 When switching to the first switching end of the second single-pole multi-throw switch 41, the controller 5 controls the common end of the first single-pole multi-throwing switch 31 to switch from the second switching end of the first single-pole multi-throwing switch 31 to the third switching end, The offset direction of the antenna frequency can be shown as the arrow in Figure 7, wherein the solid line is the standing wave of the antenna when the common end of the first single-pole multi-throw switch 31 is switched to the second switching end, and the dotted line is the first single-pole multi-throw switch Antenna standing wave when the common end of 31 is switched to the third switching end. Therefore, when the first switch module 3 and the second switch module 4 are single-pole multi-throw switches, and a plurality of switching ends of the single-pole multi-throw switches are respectively connected to a plurality of branch circuits such as inductors, capacitors or frequency gating circuits, the antenna of the mobile terminal The device 10 can realize the function of continuously adjustable frequency.

Specifically, in the antenna device 10 of the mobile terminal shown in FIG. 3, the first filter circuit 32 and the third filter circuit 42 are the first frequency gating circuit M1, and the second filter circuit 33 and the fourth filter circuit 43 are the first frequency gating circuit M1 During the second frequency gating circuit M2, the controller 5 controls the common end of the first single-pole multi-throw switch 31 to switch between the second switching end and the third switching end of the first single-pole multi-throwing switch 31, or controls the second single-pole multi-throwing switch 31 The common end of the throw switch 41 is switched between the second switching end and the third switching end of the second single-pole multi-throwing switch 41, and the offset direction of the antenna frequency corresponding to the switching can be as shown by the arrow in Figure 9, so that not only The frequency of the antenna can be shifted, and both the high frequency band and the low frequency band of the antenna have frequency tunable characteristics, which realizes further expansion of the antenna bandwidth, and in this case, the antenna device 10 of the mobile terminal also has the characteristics of balanced left and right head and hand modes. Wherein, the principle of balancing the left and right head and hand models is the same as the principle of balancing the left and right head and hand models of the antenna device 10 of the mobile terminal shown in FIG. 4 and FIG. 5 , and will not be repeated below. FIG. 10 is a schematic diagram of the antenna device 10 of the mobile terminal when the head-hand state of the mobile terminal is the left head and/or left-hand state, and the controller 5 is not shown in FIG. 10 . At this time, the controller 5 controls the common end of the first SPMT switch 31 to switch between the second switching end and the third switching end of the first SPMT switch 31, and controls the common end of the second SPMT switch 41 Switching to the first switching end of the second SPMT switch 41, the energy transmission direction of the low-frequency RF signal is shown by the arrow L1 in FIG. 10 , and the energy transmission direction of the high-frequency RF signal is shown by the arrow H1 in FIG. 10 . When the controller 5 controls the common end of the first single-pole multi-throw switch 31 to switch from the second switching end of the first single-pole multi-throwing switch 31 to the third switching end, as shown by the arrow in FIG. The direction is different from the offset direction of the high-frequency band antenna frequency, wherein f3 is the antenna resonance frequency of the low-frequency band, f4 is the antenna resonance frequency of the high-band band, and the solid line is that the common end of the first single-pole multi-throw switch 31 is switched to the second switch The standing wave of the antenna when the terminal is switched, and the dotted line is the standing wave of the antenna when the common terminal of the first single-pole multi-throw switch 31 is switched to the third switching terminal.

Specifically, in one embodiment of the present invention, the first filter circuit 32, the second filter circuit 33, the third filter circuit 42, and the fourth filter circuit 43 can be respectively connected to different positions on the motherboard ground 20, that is, the first There is a certain distance between the positions where the filter circuit 32, the second filter circuit 33, the third filter circuit 42, and the fourth filter circuit 43 are connected to the mainboard ground 20. At this time, in general, in the first switch module When switching between 3 and the second switch module 4, the shift direction of the low-band antenna frequency is different from the shift direction of the high-band antenna frequency.

It should be noted that, in the embodiment of the present invention, the positions of the first switch module 3 and the second switch module 4 can be set according to the needs of the resonance frequency, and the first switch module 3 and the second switch module 4 can be respectively set at the first The antenna radiator branch 11 and the second antenna radiator branch 12 are close to the end of the antenna feed source 2, the middle of the first antenna radiator branch 11 and the second antenna radiator branch 12 or the first antenna radiator branch 11 and the second antenna The end of the radiator branch 12. Generally speaking, for the antenna device 10 of the mobile terminal shown in FIG. Near the end of the antenna, the high-frequency resonance frequency of the antenna is higher, and the low-frequency resonance frequency is lower, resulting in two resonances of high and low frequencies. For example, as shown in Figure 11, when the first switch module 3 and the second switch module 4 are located at the end of the antenna feed 2, the resonant frequency of the antenna is f5; when the first switch module 3 and the second switch module 4 are located at the end of the antenna , the resonant frequency of the antenna in the low frequency band is f6, and the resonant frequency of the antenna in the high frequency band is f7, wherein, when the positions of the first switch module 3 and the second switch module 4 change from the end of the antenna feed source 2 to the end of the antenna, the antenna frequency The offset direction of can be as shown by the arrow in FIG. 11 , that is, the offset direction of the low-band antenna frequency is different from the offset direction of the high-band antenna frequency.

In addition, it should be noted that when the first switch module 3 and the second switch module 4 are located near the end of the antenna, if the first filter circuit 32 and the third filter circuit 42 are straight-through circuits, the antenna device 10 of the mobile terminal is also Two resonant frequencies of high frequency and low frequency can be generated, and in each frequency band, the antenna device 10 of the mobile terminal maintains balanced left and right head and hand model performance. At this time, a schematic structural diagram of the antenna device 10 of the mobile terminal is shown in FIG. 12 , and the controller 5 is not shown in FIG. 12 . Wherein, if in Fig. 12, the first switch module 3 is straight through, and the second switch module 4 is suspended in the air, then with reference to Fig. 13, the first antenna radiator branch 11 constitutes a LOOP antenna, which generates high frequency, the first antenna radiator branch 11 and the second antenna radiator branch 11 The two antenna radiator branches 12 jointly constitute an IFA antenna, which generates low frequencies.

Further, the ends of the first antenna radiator branch 11 and the second antenna radiator branch 12 can be symmetrically bent toward the mainboard ground 20 respectively, and the ends of the first antenna radiator branch 11 are connected to the first switch module 3, The end of the second antenna radiator branch 12 is connected to the second switch module 4, so that the size of the antenna can be further reduced. For example, referring to FIG. 14, the first switch module 3 and the second switch module 4 are single-pole three-throw switches, the first filter circuit 32 and the third filter circuit 42 are direct circuits, and the second filter circuit 33 and the fourth filter circuit 43 are inductor or capacitor etc. If the first switch module 3 is straight through and the second switch module 4 is suspended, the first antenna radiator branch 11 constitutes a LOOP antenna to generate high frequencies, and the first antenna radiator branch 11 and the second antenna radiator branch 12 together form an IFA antenna , generating a low frequency. At this time, the antenna device 10 of the mobile terminal is shown in FIG. 15 , and the controller 5 is not shown in FIG. 14 and FIG. 15 .

In another embodiment of the present invention, the first filter circuit 32 and the second filter circuit 33 can be connected to the same position on the motherboard ground 20, and the third filter circuit 42 and the fourth filter circuit 43 can be connected to the same position on the motherboard ground 20. connected at the same location. Therefore, in general, when the first switch module 3 and the second switch module 4 switch, the shift direction of the low-band antenna frequency is consistent with the shift direction of the high-band antenna frequency. In addition, by properly selecting the values of the first filter circuit 32, the second filter circuit 33, the third filter circuit 42, and the fourth filter circuit 43, it is possible to ensure that the frequency of the low-band antenna does not change, while only tuning the frequency of the high-band antenna, or Keep the high-band antenna frequency unchanged, and only tune the low-band antenna frequency. In this way, the problem of mutual influence between the low-band antenna frequency and the high-band antenna frequency during the tuning process can be reduced. Wherein, FIG. 16 is a schematic diagram of the antenna device 10 of the mobile terminal when the head-hand state of the mobile terminal is the left head and/or left-hand state, and the controller 5 is not shown in FIG. 16 . At this time, the controller 5 controls the common end of the first SPMT switch 31 to switch between the second switching end and the third switching end of the first SPMT switch 31, and controls the common end of the second SPMT switch 41 When switching to the first switching end of the second single-pole multi-throw switch 41, the controller 5 controls the common end of the first single-pole multi-throwing switch 31 to switch from the second switching end of the first single-pole multi-throwing switch 31 to the third switching end, The energy transmission direction of the low-frequency RF signal is shown by the arrow L11 in Figure 16, the energy transmission direction of the high-frequency RF signal is shown by the arrow H11 in Figure 16, and the offset direction of the antenna frequency is shown by the arrow in Figure 17, where f8 is the antenna resonant frequency of the low frequency band, f9 is the antenna resonant frequency of the high frequency band, the solid line is the antenna standing wave when the common end of the first single-pole multi-throw switch 31 is switched to the second switching end, and the dotted line is the first single-pole multi-throw switch Antenna standing wave when the common end of 31 is switched to the third switching end.

Preferably, referring to FIG. 18 , in another embodiment of the present invention, the first switch module 3 may include a third SPMT switch 34, a fifth filter circuit 35 and a sixth filter circuit 36, and the second switch module 4 may It includes a fourth SPMT switch 44 , a seventh filter circuit 45 and an eighth filter circuit 46 . Wherein, the common terminal of the third SPMT switch 34 is connected to the main board ground 20 , the first switching terminal of the third SPMT switch 34 is suspended, and the control terminal of the third SPMT switch 34 is connected to the controller 5 . The fifth filter circuit 35 is respectively connected to the second switching terminal of the third SPMT switch 34 and the first antenna radiator branch 11 . The sixth filtering circuit 36 is respectively connected to the third switching end of the third SPMT switch 34 and the first antenna radiator branch 11 . The common terminal of the fourth SPMT switch 44 is connected to the main board ground 20 , the first switching terminal of the fourth SPMT switch 44 is suspended, and the control terminal of the fourth SPMT switch 44 is connected to the controller 5 . The seventh filtering circuit 45 is respectively connected to the second switching end of the fourth SPMT switch 44 and the second antenna radiator branch 12 . The eighth filter circuit 46 is respectively connected to the third switching terminal of the fourth SPMT switch 44 and the second antenna radiator branch 12 . The controller 5 is not shown in FIG. 18 .

Specifically, in one embodiment of the present invention, the fifth filter circuit 35 and the seventh filter circuit 45 can be direct circuits, the sixth filter circuit 36 and the eighth filter circuit 46 can be inductors or capacitors, etc., or the fifth filter circuit The circuit 35 and the seventh filter circuit 45 may be a third frequency gating circuit, and the sixth filter circuit 36 and the eighth filter circuit 46 may be a fourth frequency gating circuit.

Wherein, in an embodiment of the present invention, the fifth filter circuit 35 , the sixth filter circuit 36 , the seventh filter circuit 45 and the eighth filter circuit 46 may be respectively connected to different positions on the first antenna radiator 1 . In another embodiment of the present invention, the fifth filter circuit 35 and the sixth filter circuit 36 can be connected to the same position on the first antenna radiator 1, and the seventh filter circuit 45 and the eighth filter circuit 46 can be connected to the first The same position on the antenna radiator 1 is connected.

For the antenna device 10 of the mobile terminal shown in Figure 18, since it has basically the same structure as the antenna device 10 of the mobile terminal shown in Figure 3, only the first switch module in the antenna device 10 of the mobile terminal shown in Figure 18 3 is opposite to the first switch module 3 in the antenna device 10 of the mobile terminal shown in FIG. 3, and the second switch module 4 in the antenna device 10 of the mobile terminal shown in FIG. In 10, the second switch module 4 is reversed. Therefore, the antenna device 10 of the mobile terminal shown in FIG. 18 and the antenna device 10 of the mobile terminal shown in FIG. The description is relatively simple, and for relevant parts, refer to the partial description of the antenna device 10 of the mobile terminal shown in FIG. 3 .

In yet another embodiment of the present invention, the first switch module 3 may include a first SPST switch, and the second switch module 4 may include a second SPST switch. One end of the first SPST switch is connected to the first antenna radiator branch 11 , the other end of the first SPST switch is connected to the main board ground 20 , and the control terminal of the first SPST switch is connected to the controller 5 . One end of the second SPST switch is connected to the second antenna radiator branch 12 , the other end of the second SPST switch is connected to the main board ground 20 , and the control terminal of the second SPST switch is connected to the controller 5 .

At this time, if the antenna device 10 of the mobile terminal is placed at the lower end of the mobile terminal, when the controller 5 controls the first SPST switch to close, and the second SPST switch is switched to the floating end, the radio frequency signal generated by the antenna feed 2 The energy transmitted to the first antenna radiator branch 11 is short-circuited, the radio frequency signal will be transmitted to the second antenna radiator branch 12, and radiate energy through the second antenna radiator branch 12, and the end of the antenna is also in the second antenna radiator branch 12 At this time, the performance of the corresponding left head hand model is good, the frequency deviation is less, and the problem of "death grip" is solved. Similarly, when the controller 5 controls the first SPST switch to switch to the floating end, and the second SPST switch is closed, the energy transmitted from the radio frequency signal generated by the antenna feed 2 to the second antenna radiator branch 12 is short-circuited, The radio frequency signal will be transmitted to the first antenna radiator branch 11 and radiate energy through the first antenna radiator branch 11 , and the end of the antenna is also on the side of the first antenna radiator branch 11 . At this time, the performance of the corresponding right hand model is good, the frequency deviation is less, and the problem of "death grip" is solved.

Preferably, in an embodiment of the present invention, the antenna device 10 of the mobile terminal may further include a second antenna radiator 7 and a third antenna radiator 8 . Wherein, one end of the second antenna radiator 7 is coupled to the first antenna radiator branch 11 , and the other end of the second antenna radiator 7 is connected to the main board ground 20 . The third antenna radiator 8 is symmetrical to the second antenna radiator 7, one end of the third antenna radiator 8 is coupled to the second antenna radiator branch 12, the other end of the third antenna radiator 8 is connected to the main board ground 20, and the second The antenna radiator 7 and the third antenna radiator 8 have the same resonance length.

Wherein, in one embodiment of the present invention, when the antenna device 10 of the mobile terminal includes the second antenna radiator 7 and the third antenna radiator 8, the first single-pole multi-throw switch 31 is a single-pole three-throw switch, and the second single-pole multi-throw When the throw switch 41 is a single-pole three-throw switch, the antenna device 10 of the mobile terminal is shown in FIG. 19 , and the controller 5 is not shown in FIG. 19 .

In this case, the antenna device 10 of the mobile terminal can generate additional resonance to further expand the antenna frequency band; in addition, when the first antenna radiator branch 11 resonates in the low frequency band, the second antenna radiator 7 resonates in the high frequency band, or when When the first antenna radiator branch 11 resonates in the high frequency band, the second antenna radiator 7 resonates in the low frequency band, or when the second antenna radiator branch 12 resonates in the low frequency band, the third antenna radiator 8 resonates in the high frequency band, Or when the second antenna radiator branch 12 resonates in the high frequency band, the third antenna radiator 8 resonates in the low frequency band. Thereby, the high and low frequency performance of any head and hand model can be guaranteed to be good. In this case, the principle of balancing the left and right head and hand models is the same as the principle of balancing the left and right head and hand models of the antenna device 10 of the mobile terminal shown in FIGS. 4 and 5 above. , which will not be repeated below. It should be noted that the shapes of the second antenna radiator 7 and the third antenna radiator 8 can be flexible and changeable, for example, they can be multi-resonant structures such as G-shape or F-shape.

It should be noted that when the feed-in device 6 is coupled with the first antenna radiator 1, as shown in FIG. 20 , the antenna can add another resonance, that is, the antenna can generate double resonance, thereby further expanding the bandwidth of the antenna. It should be further explained that if the feed-in device 6 is coupled with the first antenna radiator 1, the shape of the first antenna radiator 1 can be a PIFA antenna, an IFA antenna, a Monopole antenna or a LOOP antenna, etc., while the feed-in device 6 The middle coupling sheet can generate resonance, and the first antenna radiator 1 can be used as the main radiator, and at this time, the first antenna radiator 1 generates resonance, or the first antenna radiator 1 can be used as an auxiliary radiator, and at this time, the first antenna radiator 1 does not generate resonance, and is used to guide the transmission direction of radio frequency energy, thereby controlling the end of the antenna to be on the left or right side of the mobile terminal, that is, at this time, the physical length of the first antenna radiator 1 can be any. Generally, the physical length of the first antenna radiator 1 may be about 1/4 wavelength or 1/2 wavelength of the resonant frequency of the coupling plate, or longer.

For example, when the physical length of the first antenna radiator 1 is about 1/4 wavelength of the resonant frequency of the coupling plate, the first antenna radiator 1 can generate high-frequency resonance, thereby expanding the high-frequency bandwidth and generating double resonance. For each frequency band, the antenna device 10 of the mobile terminal can maintain balanced left and right head and hand model performance. Wherein, the double resonance generated by the first antenna radiator 1 is shown in FIG. 21 . If the physical length of the first antenna radiator 1 is about 1/2 wavelength of the resonance frequency of the coupling sheet, and the physical length of the coupling sheet is about 1/4 wavelength of the resonance frequency of the coupling sheet, then the first antenna radiator 1 is in the high frequency band No resonance is generated. At this time, the first antenna radiator 1 is used as an auxiliary radiator in the high frequency band, but the first antenna radiator 1 can generate a resonance in the low frequency band. At this time, the first antenna radiator 1 is used as the main radiator in the low frequency band. body, and in each frequency band, the antenna device 10 of the mobile terminal can maintain a balanced left and right head and hand model performance.

In a specific embodiment of the present invention, referring to FIG. 22 , the coupling feed branch 61 of the feed-in device 6 is coupled to the first antenna radiator 1 through a gap, and the entire casing of the mobile terminal is a metal battery cover with side edges. structure type. Wherein, the metal battery cover is divided into the motherboard ground 20, the first antenna radiator branch 11 and the second antenna radiator branch 12 by the gap, the gap is filled with insulating materials such as plastic, the first switch module 3, the second switch module 4 They are respectively set on both sides of the whole machine. It should be noted that if a mobile terminal with an all-metal shell adopts a traditional antenna solution, it will be greatly affected by the hand, that is, adding a hand will not only greatly shift the resonant frequency of the antenna, but also cause a serious mismatch in the performance of the left and right head and hand models. At the same time, it will significantly increase the absorption loss. Especially when the thumb side of the hand is close to one side of the gap, the problem of "death grip" is very likely to occur. Similarly, when a mobile terminal with an all-metal casing is tested in a darkroom for the performance of the head and hand models, there will also be an obvious phenomenon of unbalanced performance between the left and right head and hand models.

However, when the mobile terminal has an all-metal casing, after the first coupling branch 102 is added to the antenna device 10 of the mobile terminal, the first coupling branch 102 is coupled to the first antenna radiator 1 through the gap, and the first coupling branch 102 is connected to the ground 20 of the main board. , not only can solve the above problems well, and realize the expanded bandwidth, but also can weaken the coupling amount between the coupling feed-in branch 61 and the first antenna radiator branch 11, and weaken the first coupling branch 102 and the second antenna radiator branch 12 The amount of coupling, to achieve enhanced coupling feeding branch 61 and the radiation capability of the first coupling branch 102, and weaken the radio frequency energy of the first antenna radiator branch 11 and the second antenna radiator branch 12, thereby further reducing the size of the first switch module 3. Loss of the second switch module 4 .

Wherein, when the controller 5 controls the first switch module 3 to be turned on, and the second switch module 4 is switched to the floating end, the data curve of the right hand model of the antenna device 10 of the mobile terminal shown in FIG. 22 is shown in curve b in FIG. 23 As shown, the left hand model data curve is shown in curve c in Figure 23. From Figure 23, it can be found that the right hand model data of the antenna device 10 of the mobile terminal is good at this time, and the absorption is small, while the left hand model data It is about 10dB lower, and the absorption is very large. Therefore, when the antenna device 10 of the mobile terminal is in the right head and/or right hand state, this switching state can be selected, wherein, curve a in FIG. 23 is the free space of the antenna device 10 of the mobile terminal data curve. In addition, when the controller 5 controls the second switch module 4 to be turned on, and the first switch module 3 is switched to the floating end, the data curve of the right hand model of the antenna device 10 of the mobile terminal in FIG. 22 is shown in the curve e in FIG. 24 , The left hand model data curve is shown in the curve f in Figure 24. From Figure 24, it can be found that the left hand model data of the antenna device 10 of the mobile terminal is good at this time, and the absorption is small, while the right hand model data is about 3dB lower ~ 10dB, the absorption is large, therefore, when the antenna device 10 of the mobile terminal is in the left head and/or left hand state, this switch state can be selected, where curve d in Figure 24 is the free space data curve of the antenna device 10 of the mobile terminal . Through the above selection, the performance of the left and right head and hand models is finally balanced, and the absorption is small, which is greatly improved compared with the traditional antenna scheme.

It should be noted that, in FIG. 22 , since the coupling feed branch 61 and the first coupling branch 102 of the feed device 6 are respectively coupled with the slot of the first antenna radiator 1, the coupling feed branch 61 and the first coupling branch 102 generate high frequency resonance, while the first antenna radiator 1 can be used as the main high-frequency radiator, the first antenna radiator 1 produces resonance, or the first antenna radiator 1 is used as a high-frequency auxiliary radiator, at this time the first antenna radiator 1 Does not create resonance, but directs the direction of RF energy transmission, thereby controlling whether the antenna tip is on the left or right side of the mobile terminal.

In Fig. 22, due to the limitation of the structural size of the mobile terminal, the physical length of the first antenna radiator 1 can be fixed to about one wavelength of the resonant frequency of the coupling plate. Therefore, it is difficult to generate resonance at high frequencies, resulting in a relatively narrow high-frequency bandwidth. Difficult to cover 1710M ~ 2690M. It should be noted that the antenna device 10 of the mobile terminal in FIG. 22 is not only applicable to mobile terminals with all-metal casings, mobile terminals with metal battery cover casings on the back, but also mobile terminals with metal frame casings, and the first antenna radiator 1 The same applies when changing to a metal frame.

In a specific embodiment of the present invention, when the feeding device 6 is slot-coupled with the first antenna radiator 1, the antenna device 10 of the mobile terminal may further include: a first tuning unit 9 or a second tuning unit 101, wherein, Referring to Fig. 25, one end of the first tuning unit 9 is connected to the coupling feeding branch 61 of the feeding device 6, such as a coupling plate, and the other end of the first tuning unit 9 is connected to the main board ground 20; the coupling feeding branch 61 is connected to the first antenna Radiator 1 is slot coupled. Referring to FIG. 26 , one end of the second tuning unit 101 is connected to the antenna feed 2 , and the other end of the second tuning unit 101 is connected to the coupling feed branch 61 .

In a specific embodiment of the present invention, referring to FIG. 25, the antenna device 10 of the mobile terminal may further include: a first coupling branch 102 such as a coupling piece and a third tuning unit 103, wherein the first coupling branch 102 is connected to the first antenna The radiator 1 is slot-coupled, and the first coupling branch 102 is connected to the mainboard ground 20 ; one end of the third tuning unit 103 is connected to the first coupling branch 102 , and the other end of the third tuning unit 103 is connected to the mainboard ground 20 .

In another specific embodiment of the present invention, referring to FIG. 26, the antenna device 10 of the mobile terminal may further include: a second coupling branch 104 such as a coupling piece and a fourth tuning unit 105, wherein the second coupling branch 104 is connected to the first The antenna radiator 1 is slot-coupled; one end of the fourth tuning unit 105 is connected to the main board ground 20 , and the other end of the fourth tuning unit 105 is connected to the second coupling branch 104 .

Among them, the first tuning unit 9, the second tuning unit 101, the third tuning unit 103, and the fourth tuning unit 105 can be variable inductors, or can be variable capacitors, so that the bandwidth can be further expanded, and at this time For each frequency band, the antenna device 10 of the mobile terminal can maintain balanced left and right head and hand model performance.

In one embodiment of the present invention, the first tuning unit 9 and the third tuning unit 103 are variable capacitors. When the capacitance values of the first tuning unit 9 and the third tuning unit 103 increase, the deviation direction of the antenna frequency is as follows: As shown in Figure 27, the resonant frequency of the antenna device 10 of the mobile terminal will be shifted to the low frequency direction, thereby further expanding the antenna bandwidth, especially the high frequency bandwidth of the antenna, wherein the solid line is the antenna frequency before the capacitance value is increased, and the dotted line is the antenna frequency after the capacitor value is increased.

The antenna device of the mobile terminal according to the embodiment of the present invention has the following advantages:

The feed-in device is set to be coupled with the first antenna radiator, or the feed-in device is a wire connected to the first antenna radiator, and the antenna feed is respectively connected to the feed-in device and the main board of the mobile terminal. The first switch module is, for example, a single-pole The single-throw switch or the single-pole multi-throw switch is respectively connected to the first antenna radiator branch of the first antenna radiator and the main board ground, the second switch module such as the single-pole single-throw switch or the single-pole multi-throw switch is symmetrical to the first switch module, and the second The switch modules are respectively connected to the second antenna radiator branch and the main board ground, and then the controller controls the first switch module to close and the second switch module to switch to the floating terminal, or controls the first switch module to switch to the floating terminal and the second switch module Closed, so that only one antenna feed point and two switches are needed to achieve balanced left and right head-hand mode functions. The cost is low, and the switching loss and head-hand mode absorption are small, and the final improvement effect is better (for example, 10dB improvement), not only reducing Reduced the difficulty of design and debugging, and can solve the problem of "death grip";

In addition, if the switch branch is added, the frequency tunable function can also be realized, such as working in different systems according to needs, such as GSM (Global System for Mobile Communication, Global System for Mobile Communication)/TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division Synchronous Code Division Multiple Access)/WCDMA (Wideband Code Division Multiple Access, Wideband Code Division Multiple Access)/LTE (Long Term Evolution, Long Term Evolution), etc., or work in different antenna frequency bands according to needs, such as GSM850/GSM900 and other low Frequency band or high frequency bands such as GSM1800/GSM1900, etc., and can solve the mutual influence between high and low frequencies during tuning;

At the same time, due to the multiplexing switch, the cost can be further reduced, the design can be simplified, and the switching loss can be reduced;

In addition, if the antenna adopts the coupling feeding method, the weaker coupling can make the switching loss smaller and further reduce the switching loss;

Furthermore, through ingenious switching, adding frequency gating circuits, adding antenna radiators or adding parasitic branches, etc., it can also meet the needs of multiple frequency bands, and each frequency band has the function of frequency adjustment and balanced left and right head and hand modes. .

The embodiment of the present invention also discloses a mobile terminal, including a mainboard ground 20 and the antenna device 10 of the mobile terminal mentioned above, and the antenna device 10 of the mobile terminal is connected to the mainboard ground 20 .

Specifically, the casing of the mobile terminal in the embodiment of the present invention may be a mobile terminal with a metal casing such as a plastic casing, a metal frame casing, an all-metal casing, or a metal battery cover casing on the back, or a mobile terminal with other casings.

The mobile terminal of the embodiment of the present invention has the following advantages: the antenna device of the mobile terminal only needs one antenna feed point and two switches to realize the function of balancing the left and right head and hand models, the cost is low, and the switch loss and the head and hand model are reduced. Absorption reduces the difficulty of design and debugging, and can solve the problem of "death grip".

As for the embodiment of the mobile terminal, since it includes the embodiment of the antenna device of the mobile terminal, the description is relatively simple, and for related parts, refer to the part of the description of the embodiment of the antenna device of the mobile terminal.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

Having described preferred embodiments of embodiments of the present invention, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, the appended claims are intended to be construed to cover the preferred embodiment and all changes and modifications which fall within the scope of the embodiments of the present invention.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or terminal equipment comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements identified, or also include elements inherent in such a process, method, article, or end-equipment. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The antenna device of a mobile terminal and a mobile terminal provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for To help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification It should not be construed as a limitation of the invention.

Claims (17)

1. a kind of antenna assembly of mobile terminal, which is characterized in that including：

First antenna radiator, the first antenna radiator include symmetrical first antenna radiator branch and the second antenna spoke Beam branch；

Feedthrough, the feedthrough are the conducting wire being connected with the first antenna radiator or the feedthrough and institute State first antenna radiator slot-coupled；

Antenna feed, the antenna feed is connected with the mainboard of the feedthrough and mobile terminal respectively, in the antenna It is formed with antenna feed point between feed and the feedthrough；

First switch module, the first switch module with first antenna radiator branch and the mainboard phase respectively Even；

Second switch module, the second switch module and the first switch module symmetry, the second switch module difference It is connected with second antenna radiator branch and the mainboard；

Controller, the controller are connected with the first switch module and the second switch module respectively, the controller Control the first switch module closure, the second switch module switches to free end, or controls the first switch module Switch to free end, the second switch module is closed.

2. antenna assembly according to claim 1, which is characterized in that

The first switch module includes：

First single pole multiple throw, common end and the first antenna radiator branch phase of first single pole multiple throw Even, the first switch terminal of first single pole multiple throw is hanging, control terminal and the control of first single pole multiple throw Device processed is connected；

First filter circuit, first filter circuit respectively with the second switch terminal of first single pole multiple throw and described Mainboard it is connected；

Second filter circuit, second filter circuit respectively with the third switch terminal of first single pole multiple throw and described Mainboard it is connected；

The second switch module includes：

Second single pole multiple throw, common end and second antenna radiator branch phase of second single pole multiple throw Even, the first switch terminal of second single pole multiple throw is hanging, control terminal and the control of second single pole multiple throw Device processed is connected；

Third filter circuit, the third filter circuit respectively with the second switch terminal of second single pole multiple throw and described Mainboard it is connected；

4th filter circuit, the 4th filter circuit respectively with the third switch terminal of second single pole multiple throw and described Mainboard it is connected.

3. antenna assembly according to claim 2, which is characterized in that

First filter circuit and the third filter circuit are direct circuit, second filter circuit and the 4th filter Wave circuit is inductance or capacitance；Or first filter circuit and the third filter circuit are first frequency gating electricity Road, second filter circuit and the 4th filter circuit are second frequency gating circuit.

4. antenna assembly according to claim 2, which is characterized in that first filter circuit, second filtered electrical Road, the third filter circuit and the 4th filter circuit are connected with the different location of the mainboard ground respectively.

5. antenna assembly according to claim 2, which is characterized in that first filter circuit and second filtered electrical Road is connected with the same position of the mainboard ground, and the third filter circuit and the 4th filter circuit are with the mainboard On same position be connected.

6. antenna assembly according to claim 2, which is characterized in that the end of first antenna radiator branch and institute State the end of the second antenna radiator branch respectively symmetrically to the mainboard place to bending, the first antenna radiator point The end of branch is connected with the first switch module, the end of second antenna radiator branch and the second switch module It is connected.

7. antenna assembly according to claim 1, which is characterized in that

The first switch module includes：

The common end of third single pole multiple throw, the third single pole multiple throw is connected with the mainboard, the third list First switch terminal of knife multithrow switch is hanging, and the control terminal of the third single pole multiple throw is connected with the controller；

5th filter circuit, the 5th filter circuit respectively with the second switch terminal of the third single pole multiple throw and described First antenna radiator branch is connected；

6th filter circuit, the 6th filter circuit respectively with the third switch terminal of the third single pole multiple throw and described First antenna radiator branch is connected；

The second switch module includes：

The common end of 4th single pole multiple throw, the 4th single pole multiple throw is connected with the mainboard, and the described 4th is single First switch terminal of knife multithrow switch is hanging, and the control terminal of the 4th single pole multiple throw is connected with the controller；

7th filter circuit, the 7th filter circuit respectively with the second switch terminal of the 4th single pole multiple throw and described Second antenna radiator branch is connected；

8th filter circuit, the 8th filter circuit respectively with the third switch terminal of the 4th single pole multiple throw and described Second antenna radiator branch is connected.

8. antenna assembly according to claim 7, which is characterized in that

5th filter circuit and the 7th filter circuit are direct circuit, the 6th filter circuit and the 8th filter Wave circuit is inductance or capacitance；Or the 5th filter circuit and the 7th filter circuit are third frequency electing and passing electricity Road, the 6th filter circuit and the 8th filter circuit are the 4th frequency electing and passing circuit.

9. antenna assembly according to claim 7, which is characterized in that the 5th filter circuit, the 6th filtered electrical Road, the 7th filter circuit and the 8th filter circuit respectively with the different location phase on the first antenna radiator Even.

10. antenna assembly according to claim 7, which is characterized in that the 5th filter circuit and the 6th filtering Circuit is connected with the same position on the first antenna radiator, the 7th filter circuit and the 8th filter circuit with Same position on the first antenna radiator is connected.

11. antenna assembly according to claim 1, which is characterized in that

The first switch module includes：

One end of first single-pole single-throw switch (SPST), first single-pole single-throw switch (SPST) is connected with first antenna radiator branch, The other end of first single-pole single-throw switch (SPST) is connected with the mainboard, the control terminal of first single-pole single-throw switch (SPST) and institute Controller is stated to be connected；

The second switch module includes：

One end of second single-pole single-throw switch (SPST), second single-pole single-throw switch (SPST) is connected with second antenna radiator branch, The other end of second single-pole single-throw switch (SPST) is connected with the mainboard, the control terminal of second single-pole single-throw switch (SPST) and institute Controller is stated to be connected.

12. antenna assembly according to claim 1, which is characterized in that further include：

One end of second antenna radiator, second antenna radiator is coupled with first antenna radiator branch, described The other end of second antenna radiator is connected with the mainboard；

Third antenna radiator, the third antenna radiator and second antenna radiator are symmetrical, the third antenna spoke One end of beam is coupled with second antenna radiator branch, and the other end of the third antenna radiator is with the mainboard It is connected.

13. antenna assembly according to claim 1, which is characterized in that when the feedthrough and the first antenna spoke When beam slot-coupled, further include：

First tuned cell, one end of first tuned cell are connected with the coupling feed-in branch of feedthrough, and described first The other end of tuned cell is connected with the mainboard；The coupling feed-in branch and first antenna radiator gap coupling It closes；Or

One end of second tune unit, the second tune unit is connected with the antenna feed, the second tune unit The other end is connected with the coupling feed-in branch.

14. antenna assembly according to claim 1, which is characterized in that further include：

First coupling branch, the first coupling branch and the first antenna radiator slot-coupled, and first coupling Branch is connected with the mainboard；

Third tuned cell, one end of the third tuned cell are connected with first coupling branch, and the third tuning is single The other end of member is connected with the mainboard.

15. antenna assembly according to claim 1, which is characterized in that further include：

Second coupling branch, the second coupling branch and the first antenna radiator slot-coupled；

One end of 4th tuned cell, the 4th tuned cell is connected with the mainboard, the 4th tuned cell it is another One end is connected with second coupling branch.

16. a kind of mobile terminal, which is characterized in that including mainboard and the movement according to any one of claim 1-15 The antenna assembly of terminal, the antenna assembly of the mobile terminal are connected with the mainboard.

17. mobile terminal according to claim 16, which is characterized in that the shell of the mobile terminal be plastic shell, Metal frame shell, full metal jacket or back metal battery cover housing.