CN105633555B - Antenna switching component, switching method, switching system, antenna and mobile terminal - Google Patents

Abstract

The present invention provides a kind of antenna switching component, switching method, switching system, antenna and mobile terminals, wherein antenna switching component includes：Three-phase switching switch；Fixing end and selection end, first terminal and Second terminal in fixing end are grounded, third terminal in fixing end is connected to radio frequency processing module, selection end is connected to the first feed point, the second feed point and third feed point of antenna body, and any feed point in any terminal and the first feed point, the second feed point and third feed point in first end, second end and third end switches switch connection by three-phase.Technical solution through the invention realizes fixing end and selects the multiple combinations connection type at end, and then obtains multiple groups resonant state, meets the bandwidth demand that single resonance can not cover.

Description

Antenna switching component, switching method, switching system, antenna and mobile terminal

technical field

The present invention relates to the technical field of mobile terminals, in particular to an antenna switching component, a switching method, a switching system, an antenna and a mobile terminal.

Background technique

In related technologies, radio frequency antennas are widely used in mobile terminals such as mobile phones. For existing switchable or FM antennas, different resonance frequencies are obtained mainly by changing the parameters of the matching circuit of the antenna.

However, since the antenna body does not change, when the parameters of the matching circuit change, the resonance bandwidth decreases, and the obtained resonance efficiency also changes with the tuning offset. The farther away from the original resonance, the lower the efficiency.

Therefore, the resonance obtained by switching or frequency-modulating the matching circuit has a small variation range, and it is difficult to meet the bandwidth requirement, which seriously affects the communication experience of the user of the mobile terminal.

To sum up, how to design an antenna switching scheme to meet multi-band communication requirements has become an urgent technical problem to be solved.

Contents of the invention

Based on at least one of the above-mentioned technical problems, the present invention proposes a new antenna switching scheme, which realizes fixed A variety of combined connection methods between the terminal and the selection terminal, thereby obtaining multiple sets of resonance states, meeting the bandwidth requirements that cannot be covered by a single resonance.

In view of this, the present invention proposes an antenna switch assembly, including: a three-phase switch; a fixed terminal and a selection terminal, the first terminal and the second terminal in the fixed terminal are both grounded, and the third terminal in the fixed terminal is connected to The radio frequency processing module, the selection end is connected to the first feed point, the second feed point and the third feed point of the antenna body, and any one of the first end, the second end and the third end is connected to the first feed point, the second feed point Any one of the feed point and the third feed point is connected through a three-phase switch.

In this technical solution, by setting a three-phase switch, multiple terminals at the fixed end, and multiple feed points at the selection end in the antenna switching component, various combined connection modes of the fixed end and the selection end are realized, and multiple sets of resonance are obtained. state, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-half of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, further comprising: an impedance matching module connected between the selection terminal and the antenna body, the impedance matching module includes a first impedance matching unit, a second impedance matching unit and a third impedance matching unit, wherein, The first impedance matching unit is connected between the first feed point and the antenna body, the second impedance matching unit is connected between the second feed point and the antenna body, and the third impedance matching unit is connected between the third feed point and the antenna body .

In this technical solution, by setting the impedance matching module, the effect of obtaining the maximum power transmission is achieved. The function of the impedance matching module is to reduce power consumption through the impedance matching of the electromagnetic wave transmission line, thereby ensuring that the energy received by the receiving antenna can be maximized. Limits are transferred to a subsequent stage for processing. If the matching effect of the antenna matching circuit and the antenna is not good, that is, there is a mismatch, and reflected waves are generated in the feeder, and the reflected waves reach the transmitter and will eventually be converted into heat and consumed. At the receiving end, the signal reception will also be poor due to mismatch, that is Antenna performance is impaired. In addition, among the antenna transmission parameters, the standing wave ratio is a common parameter to characterize the matching performance. The lower the standing wave ratio, the better the matching performance, and the higher the standing wave ratio, the worse the matching performance.

Specifically, when a high-frequency signal is transmitted along the feeder from the beginning to the end, the current or voltage at each point on the line will change according to the beat of the high-frequency oscillation. This situation is like arousing an invisible phenomenon on the line Wave, if the impedance does not match the characteristics of the feeder, it cannot absorb all the incoming high-frequency signal power.

According to the second aspect of the present invention, a switching method is also proposed, including: determining the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted.

In this technical solution, by determining the connection state of the three-phase switch according to the radio frequency signal, various combination connection modes of the fixed end and the selection end are realized, and then multiple sets of resonance states are obtained, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-fifth of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, the connection state of the three-phase switch of the antenna switching component is determined according to the radio frequency signal to be transmitted, specifically including the following states: analyzing the working frequency band of the radio frequency signal; determining the resonance frequency band to which the working frequency band belongs; The corresponding relationship between the frequency band and the preset connection mode determines the connection mode of the three-phase switch, so as to control the three-phase switch to connect the fixed terminal and the selection terminal of the antenna switching component in a preset connection mode.

In this technical solution, the positions of the main feed point and the ground feed point of the antenna circuit are controlled according to the received radio frequency signal, so that the main feed point and the ground feed point of the antenna circuit are in the working state, so that the antenna circuit The resonance corresponding to the control signal is generated, which meets the requirements of different frequency bands and enables the antenna to better receive and transmit radio frequency signals.

In the above technical solution, preferably, before determining the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted, it also includes: determining the three terminals in the fixed end and the three feed points in the selection end Six preset connection modes for one-to-one connection; calculation of six resonant frequency bands of the antenna switching component under the six preset connection modes; and storage of one-to-one correspondence between the six resonant frequency bands and the six preset connection modes.

In this technical solution, by determining the resonant frequency bands corresponding to the six preset connection modes, the resonant frequency band to which the radio frequency signal belongs can be quickly determined, thereby meeting the bandwidth requirement that cannot be covered by a single resonance, and improving the efficiency of radio frequency signal transmission.

According to the third aspect of the present invention, a switching system is also proposed, including: a switching unit, configured to determine the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted.

In this technical solution, by determining the connection state of the three-phase switch according to the radio frequency signal, various combination connection modes of the fixed end and the selection end are realized, and then multiple sets of resonance states are obtained, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-fifth of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, the switching unit further includes: an analyzing unit for analyzing the working frequency band of the radio frequency signal; a determining unit for determining the resonant frequency band to which the working frequency band belongs; the determining unit is also used for: according to the resonant frequency band and the predetermined The corresponding relationship of the connection modes is established to determine the connection mode of the three-phase switch, so as to control the three-phase switch to connect the fixed terminal and the selection terminal of the antenna switching component in a preset connection mode.

In this technical solution, the positions of the main feed point and the ground feed point of the antenna circuit are controlled according to the received radio frequency signal, so that the main feed point and the ground feed point of the antenna circuit are in the working state, so that the antenna circuit The resonance corresponding to the control signal is generated, which meets the requirements of different frequency bands and enables the antenna to better receive and transmit radio frequency signals.

In the above technical solution, preferably, the determination unit is also used to: determine the six preset connection modes of one-to-one connection between the three terminals in the fixed end and the three feed points in the selection end; the switching system further includes: a calculation unit , used to calculate the six resonant frequency bands of the antenna switching component under the six preset connection modes; the storage unit is used to store the one-to-one correspondence between the six resonant frequency bands and the six preset connection modes.

In this technical solution, by determining the resonant frequency bands corresponding to the six preset connection modes, the resonant frequency band to which the radio frequency signal belongs can be quickly determined, thereby meeting the bandwidth requirement that cannot be covered by a single resonance, and improving the efficiency of radio frequency signal transmission.

According to a fourth aspect of the present invention, an antenna is also provided, including the antenna switching component according to any one of the above, and/or the switching system according to any one of the above. Therefore, the antenna has the same technical effect as the antenna switching component and the switching system in any one of the above technical solutions, which will not be repeated here.

According to a fifth aspect of the present invention, a mobile terminal is also proposed, including the above-mentioned antenna. Therefore, the terminal has the same technical effect as the antenna of the above technical solution, which will not be repeated here.

Through the above technical solutions, by setting a three-phase switch, multiple terminals at the fixed end, and multiple feed points at the selection end in the antenna switching component, various combined connection modes of the fixed end and the selection end are realized, and multiple sets of resonance states are obtained. , meeting the bandwidth requirements that cannot be covered by a single resonance.

Description of drawings

FIG. 1 shows a schematic diagram of an antenna switching assembly according to an embodiment of the present invention;

FIG. 2 shows a schematic flowchart of a handover method according to an embodiment of the present invention;

Fig. 3 shows a schematic block diagram of a switching system according to an embodiment of the present invention;

Fig. 4 shows a schematic block diagram of an antenna according to an embodiment of the present invention;

Fig. 5 shows a schematic block diagram of a mobile terminal according to an embodiment of the present invention;

Fig. 6 shows a schematic diagram of the first connection state of antenna feed point access according to an embodiment of the present invention;

Fig. 7 shows a schematic diagram of a second connection state of antenna feed point access according to an embodiment of the present invention;

Fig. 8 shows a schematic diagram of a third connection state of antenna feed point access according to an embodiment of the present invention;

FIG. 9 shows a test waveform diagram of a resonance frequency according to an embodiment of the present invention;

Fig. 10 shows a schematic diagram of an antenna switching assembly according to an embodiment of the present invention.

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented by a third party different from the third party described here. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

Fig. 1 shows a schematic diagram of an antenna switching assembly according to an embodiment of the present invention.

As shown in Figure 1, the antenna switching assembly 100 according to the embodiment of the present invention includes: a three-phase switch 102; a fixed terminal and a selection terminal, the first terminal 1022 and the second terminal 1024 in the fixed terminal are both grounded, The third terminal 1026 in the antenna is connected to the radio frequency processing module 108, the selection terminal 1024 is connected to the first feed point 1042, the second feed point 1044 and the third feed point 1046 of the antenna body, the first terminal 1022, the second terminal 1024 and the first feed point 1046 Any one of the three terminals 1026 is connected to any one of the first feed point 1042 , the second feed point 1044 and the third feed point 1046 through the three-phase switch 102 .

In this technical solution, by setting a three-phase switch, multiple terminals at the fixed end, and multiple feed points at the selection end in the antenna switching component, various combined connection modes of the fixed end and the selection end are realized, and multiple sets of resonance are obtained. state, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-half of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, it also includes: an impedance matching module connected between the selection terminal and the antenna body 104, the impedance matching module includes a first impedance matching unit 1062, a second impedance matching unit 1064 and a third impedance matching unit 1064, wherein the first impedance matching unit 1062 is connected between the first feed point 1042 and the antenna body 104, the second impedance matching unit 1064 is connected between the second feed point 1044 and the antenna body 104, and the third impedance matching unit 1066 The element is connected between the third feed point 1046 and the antenna body 104 .

In this technical solution, by setting the impedance matching module, the effect of obtaining the maximum power transmission is achieved. The function of the impedance matching module is to reduce power consumption through the impedance matching of the electromagnetic wave transmission line, thereby ensuring that the energy received by the receiving antenna can be maximized. Limits are transferred to a subsequent stage for processing. If the matching effect of the antenna matching circuit and the antenna is not good, that is, there is a mismatch, and reflected waves are generated in the feeder, and the reflected waves reach the transmitter and will eventually be converted into heat and consumed. At the receiving end, the signal reception will also be poor due to mismatch, that is Antenna performance is impaired. In addition, among the antenna transmission parameters, the standing wave ratio is a common parameter to characterize the matching performance. The lower the standing wave ratio, the better the matching performance, and the higher the standing wave ratio, the worse the matching performance.

Specifically, when a high-frequency signal is transmitted along the feeder from the beginning to the end, the current or voltage at each point on the line will change according to the beat of the high-frequency oscillation. This situation is like arousing an invisible phenomenon on the line Wave, if the impedance does not match the characteristics of the feeder, it cannot absorb all the incoming high-frequency signal power.

Fig. 2 shows a schematic flowchart of a handover method according to an embodiment of the present invention.

As shown in FIG. 2 , the switching method according to the embodiment of the present invention includes: step 202 , determining the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted.

In this technical solution, by determining the connection state of the three-phase switch according to the radio frequency signal, various combination connection modes of the fixed end and the selection end are realized, and then multiple sets of resonance states are obtained, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-fifth of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, the connection state of the three-phase switch of the antenna switching component is determined according to the radio frequency signal to be transmitted, specifically including the following states: analyzing the working frequency band of the radio frequency signal; determining the resonance frequency band to which the working frequency band belongs; The corresponding relationship between the frequency band and the preset connection mode determines the connection mode of the three-phase switch, so as to control the three-phase switch to connect the fixed terminal and the selection terminal of the antenna switching component in a preset connection mode.

In this technical solution, the positions of the main feed point and the ground feed point of the antenna circuit are controlled according to the received radio frequency signal, so that the main feed point and the ground feed point of the antenna circuit are in the working state, so that the antenna circuit The resonance corresponding to the control signal is generated, which meets the requirements of different frequency bands and enables the antenna to better receive and transmit radio frequency signals.

In the above technical solution, preferably, before determining the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted, it also includes: determining the three terminals in the fixed end and the three feed points in the selection end Six preset connection modes for one-to-one connection; calculation of six resonant frequency bands of the antenna switching component under the six preset connection modes; and storage of one-to-one correspondence between the six resonant frequency bands and the six preset connection modes.

In this technical solution, by determining the resonant frequency bands corresponding to the six preset connection modes, the resonant frequency band to which the radio frequency signal belongs can be quickly determined, thereby meeting the bandwidth requirement that cannot be covered by a single resonance, and improving the efficiency of radio frequency signal transmission.

Fig. 3 shows a schematic block diagram of a switching system according to an embodiment of the present invention.

As shown in FIG. 3 , the switching system 300 according to the embodiment of the present invention includes: a switching unit 302 configured to determine the connection state of the three-phase switching switch of the antenna switching component according to the radio frequency signal to be transmitted.

In this technical solution, by determining the connection state of the three-phase switch according to the radio frequency signal, various combination connection modes of the fixed end and the selection end are realized, and then multiple sets of resonance states are obtained, which meets the bandwidth requirements that cannot be covered by a single resonance.

Specifically, each antenna has a central operating frequency. When the operating frequency deviates from the central operating frequency, some electrical properties of the antenna will decrease, and the frequency range in which the electrical properties decrease to the allowable value is the bandwidth of the antenna. Walk a line next to the main antenna, the high-frequency band part forms a standing wave and merges with the main antenna's high-frequency standing wave to widen the bandwidth, and the grounding point is evolved from the dipole antenna, using a limited ground plane as the other four One-fifth of the wavelength constitutes a theoretical dipole antenna. The best position of the so-called feed point is the position where it is easiest to radiate electromagnetic wave energy in the form of electric waves. If the feed point is placed on the edge, the hot spot of the motherboard current will be more likely to concentrate on the edge of the motherboard, and the power between the motherboard and the antenna will be more easily connected together. The main feed point (RF signal input point) and the ground feed point (ground signal input point) The relative distance between the points) on the antenna routing corresponds to the multiple frequency bands that the antenna needs to cover.

In the above technical solution, preferably, the switching unit 302 further includes: an analysis unit 3022 for analyzing the working frequency band of the radio frequency signal; a determination unit 3024 for determining the resonance frequency band to which the working frequency band belongs; the determination unit 3024 is also used for: The corresponding relationship between the resonant frequency band and the preset connection mode determines the connection mode of the three-phase switch, so as to control the three-phase switch to connect the fixed terminal and the selection terminal of the antenna switching component in a preset connection mode.

In this technical solution, the positions of the main feed point and the ground feed point of the antenna circuit are controlled according to the received radio frequency signal, so that the main feed point and the ground feed point of the antenna circuit are in the working state, so that the antenna circuit The resonance corresponding to the control signal is generated, which meets the requirements of different frequency bands and enables the antenna to better receive and transmit radio frequency signals.

In the above technical solution, preferably, the determination unit 3024 is also used to: determine the six preset connection modes of one-to-one connection between the three terminals in the fixed end and the three feed points in the selection end; the switching system also includes: The unit 304 is used to calculate the six resonant frequency bands of the antenna switching component under the six preset connection modes; the storage unit 306 is used to store the one-to-one correspondence between the six resonant frequency bands and the six preset connection modes.

In this technical solution, by determining the resonant frequency bands corresponding to the six preset connection modes, the resonant frequency band to which the radio frequency signal belongs can be quickly determined, thereby meeting the bandwidth requirement that cannot be covered by a single resonance, and improving the efficiency of radio frequency signal transmission.

Fig. 4 shows a schematic block diagram of an antenna according to an embodiment of the present invention.

As shown in FIG. 4, the antenna 400 according to the embodiment of the present invention includes the antenna switching assembly 100 of any one of the above, and/or the switching system 300 of any of the above. Therefore, the antenna has the same technical solution as above Any one of the antenna switching components 100 and the switching system 300 has the same technical effect, which will not be repeated here.

Fig. 5 shows a schematic block diagram of a mobile terminal according to an embodiment of the present invention.

As shown in FIG. 5 , the mobile terminal 500 according to the embodiment of the present invention includes the above-mentioned antenna 400 , therefore, the mobile terminal has the same technical effect as the antenna 400 of the above-mentioned technical solution, which will not be repeated here.

The antenna switching scheme according to the present invention will be further described below with reference to FIG. 6 to FIG. 9 .

Fig. 6 shows a schematic diagram of a first connection state of antenna feed point access according to an embodiment of the present invention.

As shown in Figure 6, the antenna body is provided with a first feed point, a second feed point and a third feed point, wherein the first ground signal is connected to the first feed point through a three-phase switch, and the second ground signal is connected to the first feed point through a three-phase switch. The phase switch is connected to the first feed point and the third feed point to form two ground feed points. The radio frequency signal is connected to the second feed point through the three-phase switch to form the main feed point. There is a third feed point between the antenna body and the switch. An impedance matching unit, a second impedance matching unit and a third impedance matching unit, the waveforms generated by the first connection state in FIG. 9 are shown.

Fig. 7 shows a schematic diagram of a second connection state of antenna feed point access according to an embodiment of the present invention.

As shown in Figure 7, the antenna body is provided with a first feed point, a second feed point and a third feed point, wherein the first ground signal is connected to the second feed point through a three-phase switch, and the second ground signal is connected to the second feed point through a three-phase switch. The phase switch is connected to the third feed point to form two ground feed points, the radio frequency signal is connected to the first feed point through the three-phase switch to form the main feed point, and the first impedance matching unit is arranged between the antenna body and the switch , the waveforms generated by the second impedance matching unit and the third impedance matching unit are shown in the second connection state in FIG. 9 .

Fig. 8 shows a schematic diagram of a third connection state of antenna feed point access according to an embodiment of the present invention.

As shown in Figure 8, the antenna body is provided with a first feed point, a second feed point and a third feed point, wherein the first ground signal is connected to the first feed point through a three-phase switch, and the second ground signal is connected to the first feed point through a three-phase switch. The phase switch is connected to the second feed point to form two ground feed points, and the radio frequency signal is connected to the third feed point through the three-phase switch to form the main feed point. A first impedance matching unit is arranged between the antenna body and the switch , the waveform diagram generated by the second impedance matching unit and the third impedance matching unit is shown in FIG. 9 in the third connection state.

FIG. 9 shows a test waveform diagram of a resonant frequency according to an embodiment of the present invention.

As shown in Figure 9, it is the resonance waveform diagram of the three resonance states in Figure 6 to Figure 8, wherein the input signal of the X-axis is the resonance frequency, the unit: MHz, and the output signal of the Y-axis is the standing wave ratio (SWR,Voltage Standing Wave Ratio), refers to the ratio of the standing wave antinode voltage to the valley voltage amplitude. When the standing wave ratio is equal to 1, the impedance of the logo feeder and the antenna is completely matched. At this time, all high-frequency energy is radiated by the antenna, and there is no energy. Return Loss.

In addition, it is worth pointing out that in order to further broaden the working frequency band of the antenna, the antenna switching component can also be set to include a plurality of radio frequency processing modules (such as M, M is an integer greater than or equal to 2) and multiple ground terminals (such as is N, and N is an integer greater than or equal to 1), correspondingly, the number of switching switches is equal to M+N, the specific connection is shown in Figure 10, and the antenna switching component includes: the first feed point, the second feed point and the first feed point Three feed points, as well as the first radio frequency signal, the second radio frequency signal and the ground signal, are connected through a three-phase switch, specifically, the first feed point is connected to the first radio frequency signal, and the second feed point is connected to the second radio frequency signal , and the third feed point is connected to the ground signal, wherein the connection modes can also be switched to six types.

Combining with Figures 6 to 10, it can be seen that by controlling the three-phase switch in different connection states, the antenna can generate resonances in different frequency bands, which can cover a wider frequency after combination.

The technical scheme of the present invention has been described in detail above in conjunction with the accompanying drawings. Considering the technical problem of how to design an antenna switching scheme to meet the communication requirements of multiple frequency bands in the related art, the present invention proposes a new antenna switching scheme. The antenna switching component is equipped with a three-phase switch, multiple terminals at the fixed end, and multiple feed points at the optional end, realizing multiple combined connection modes between the fixed end and the optional end, and then obtaining multiple sets of resonance states, satisfying the requirements that cannot be covered by single resonance bandwidth requirements.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of antenna switching component, the side of the antenna switching component is connected to the antenna sheet for being used for transmission radiofrequency signal The other side of body, the antenna switching component is connected to radio frequency processing module, which is characterized in that the antenna switching component packet It includes：

Three-phase switching switch；

Fixing end and selection end, first terminal and Second terminal in the fixing end are grounded, the third in the fixing end Terminal is connected to the radio frequency processing module, the selection end be connected to the first feed point of the antenna body, the second feed point and Third feed point, the first end, the second end and any terminal and first feed point, described second in the third end Any feed point in feed point and the third feed point passes through three-phase switching switch connection.

2. antenna switching component according to claim 1, which is characterized in that further include：

Impedance matching module is connected between the selection end and the antenna body, and the impedance matching module includes first Impedance matching unit, the second impedance matching unit and third impedance matching unit,

Wherein, first impedance matching unit is connected between first feed point and the antenna body, second resistance Anti- matching unit is connected between second feed point and the antenna body, and the third impedance matching unit is connected to described Between third feed point and the antenna body.

3. a kind of switching method is suitable for antenna switching component as claimed in claim 1 or 2, which is characterized in that the switching Method includes：

The connection status of the three-phase switching switch of the antenna switching component is determined according to radiofrequency signal to be transmitted.

4. switching method according to claim 3, which is characterized in that determine the antenna according to radiofrequency signal to be transmitted The connection status of the three-phase switching switch of changeover module, specifically includes following state：

Parse the working frequency range of the radiofrequency signal；

Determine resonance band belonging to the working frequency range；

According to the corresponding relationship of the resonance band and default connection type, the connection type of the three-phase switching switch is determined, Fixing end and the selection end of the antenna switching component are connected to control the three-phase switching switch with the default connection type.

5. switching method according to claim 4, which is characterized in that determining the day according to radiofrequency signal to be transmitted Before the connection status of the three-phase switching switch of line changeover module, further include：

Determine six kinds of default connections that three in the fixing end terminals are connect one by one with three feed points in the selection end Mode；

It calculates under six kinds of default connection types, six resonance bands of the antenna switching component；

Store the one-to-one relationship of six resonance bands Yu six kinds of default connection types.

6. a kind of switching system is suitable for antenna switching component as claimed in claim 1 or 2, which is characterized in that the switching System includes：

Switch unit, for determining that the three-phase of the antenna switching component switches the connection of switch according to radiofrequency signal to be transmitted State.

7. switching system according to claim 6, which is characterized in that the switch unit further includes：

Resolution unit, for parsing the working frequency range of the radiofrequency signal；

Determination unit, for determining resonance band belonging to the working frequency range；

The determination unit is also used to：According to the corresponding relationship of the resonance band and default connection type, the three-phase is determined Switch the connection type of switch, connects the antenna switch groups to control the three-phase switching switch with the default connection type The fixing end of part and selection end.

8. switching system according to claim 7, which is characterized in that

The determination unit is also used to：Determine three terminals in the fixing end with three feed points in the selection end one by one Six kinds of default connection types of connection；

The switching system further includes：

Computing unit, for calculating under six kinds of default connection types, six resonance bands of the antenna switching component；

Storage unit, for storing the one-to-one relationship of six resonance bands Yu six kinds of default connection types.

9. a kind of antenna, which is characterized in that including, antenna switching component as claimed in claim 1 or 2, and/or as right is wanted Switching system described in asking any one of 6 to 8.

10. a kind of mobile terminal, which is characterized in that including：Antenna as claimed in claim 9.