CN108539379A - Antenna system and related product - Google Patents

Abstract

The embodiment of the application discloses an antenna system and a related product, the antenna system comprises: the antenna comprises an antenna radiator, a first signal source, a second signal source, a first capacitor, a second capacitor and a first tuner; the left end of the antenna radiator is connected with one end of the first capacitor, the other end of the first capacitor is connected with the first signal source, the second end of the antenna radiator is connected with one end of the second capacitor, the other end of the second capacitor is connected with the second signal source, one end of the first tuner is connected with the antenna radiator between the first end and the second end, and the other end of the first tuner is grounded. The technical scheme provided by the application has the advantages of good antenna isolation and high user experience.

Description

Antenna Systems and Related Products

technical field

The present application relates to the technical field of mobile terminals, in particular to an antenna system and related products.

Background technique

With the popularization and application of wireless communication devices such as smart phones, more and more applications can be supported by smart phones, and the functions are becoming more and more powerful. supplies. Antenna is an essential part of smartphones. As users have higher and higher requirements for data transmission and reception of smartphones, the structure of antennas is becoming more and more complex, with multiple inputs and multiple outputs (English: Multiple-Input Multiple-Output, Abbreviation: MIMO) technology is also applied to smart phones. For MIMO antennas, the isolation of the antennas is relatively low, and the user experience is poor.

Contents of the invention

Embodiments of the present application provide an antenna system and a wireless communication device, in order to improve antenna isolation and improve user experience.

In a first aspect, an embodiment of the present application provides an antenna system, and the antenna system includes: an antenna radiator, a first signal source, a second signal source, a first capacitor, a second capacitor, and a first tuner;

The first end of the antenna radiator is connected to one end of the first capacitor, the other end of the first capacitor is connected to the first signal source, and the second end of the antenna radiator is connected to the second capacitor. One end, the other end of the second capacitor is connected to the second signal source, one end of the first tuner is connected to the antenna radiator between the first end and the second end, the The other end of the first tuner is grounded.

In a second aspect, an electronic device is provided, and the electronic device includes the antenna system of the first aspect.

It can be seen that in the embodiment of the present application, a tuner is added in this embodiment, and experiments show that the antenna system after adding the tuner has a good isolation effect, so it has the advantages of good antenna isolation and high user experience .

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a wireless communication device.

Fig. 2a is a schematic structural diagram of an antenna system of the present application.

Fig. 2b is a schematic structural diagram of another antenna system of the present application.

Fig. 3a is a schematic diagram of an antenna isolation curve of the present application.

Fig. 3b is a schematic diagram of another antenna isolation curve of the present application.

Fig. 3c is a schematic diagram of another antenna isolation curve of the present application.

Fig. 4a is a schematic structural diagram of a tuner of the present application.

Fig. 4b is a schematic structural diagram of another tuner of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

Isolation may be the ratio of the incident power on one port of a multiport antenna to the power available on the other ports for that incident power.

The wireless communication devices involved in the embodiments of the present application may include various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with wireless communication functions, as well as various forms of user equipment ( User Equipment, UE), mobile station (Mobile Station, MS), terminal device (terminal device) and so on. Of course, in other applications, the foregoing wireless communication device may also be a network-side device, such as a base station, an access point, and other network-side devices. For convenience of description, the devices mentioned above are collectively referred to as wireless communication devices.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a multi-way selection switch 10 provided by an embodiment of the present application. The multi-way selection switch is applied to a wireless communication device 100, and the wireless communication device 100 includes an antenna system 20; the antenna system 20 includes: an antenna radiator 21, a first signal source 22, a second signal source 23, a first capacitor C1 and a second capacitor C2;

Wherein, the first end of the antenna radiator 21 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the first signal source 22, the right end of the antenna radiator 21 is connected to one end of the second capacitor C2, and the second capacitor C2 The other end of the antenna radiator 21 is connected to the second signal source 22, and the first end and the second end of the antenna radiator 21 are grounded.

Referring to FIG. 1, as shown in FIG. 1, the antenna radiator 21 is logically divided into two antennas by being grounded between the first end and the second end. For the convenience of description, the two antennas are referred to here as Antenna 1 and antenna 2, antenna 1 is connected to the first signal source through C1, and antenna 2 is connected to the second signal source through C2. The isolation of the structure shown in FIG. 1 is shown in curve 301 and curve 302 of FIG. 3a. Referring to FIG. 3a, the isolation of the structure shown in FIG. 1 is relatively poor, that is, the isolation is relatively large.

Referring to FIG. 2a, FIG. 2a is an antenna system provided by the embodiment of the present application. As shown in FIG. 2a, the antenna system includes: an antenna radiator 21, a first signal source 22, a second signal source 23, and a first capacitor C1 , a second capacitor C2 and a tuner 208;

The first end of the antenna radiator 21 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the first signal source 22, the second end of the antenna radiator 21 is connected to one end of the second capacitor C2, and the second capacitor C2 The other end of the tuner 1 is connected to the second signal source 22, one end of the tuner (Tuner) 1 is connected to the antenna radiator between the first end and the second end, and the other end of the tuner 1 is grounded.

The antenna radiator 21 may specifically be: a flexible circuit board (FPC), a laser direct structuring antenna (LDS) or a printed antenna (PDS).

Referring to Figure 3a, Figure 3a is a schematic diagram of the isolation of the antenna system shown in Figure 2a when the tuner 1 is a 3.7pF capacitor, as shown in Figure 3a, curve 303 is the isolation of the antenna system shown in Figure 2a schematic diagram. As shown in Figure 3a, the isolation between the antenna 1 and the antenna 2 is improved by the 3.7pF capacitance of the tuner 1.

Referring to FIG. 2b, FIG. 2b is an antenna system provided by an embodiment of the present application. As shown in FIG. 2a, the antenna system includes: an antenna radiator 21, a first signal source 22, a second signal source 23, and a first capacitor C1 , a second capacitor C2, and three tuners;

The first end of the antenna radiator 21 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the first signal source 22, the second end of the antenna radiator 21 is connected to one end of the second capacitor C2, and the second capacitor C2 The other end of the antenna radiator 21 is connected to the second signal source 22, a point (preferably the center point) between the first end and the second end of the antenna radiator 21 is connected to one end of the tuner 1, and the other end of the tuner 1 is grounded One end of the tuner 2 is connected to the first end of the antenna radiator 21, one end of the tuner 3 is connected to the second end of the antenna radiator 21, and the other ends of the regulator 2 and the tuner 3 are grounded.

By adjusting Tuner1, the isolation of the antenna can be adjusted, and Tuner2&3 can adjust the resonant frequency of the antenna, so that the antenna can cover different frequency bands, for example: Tuner2&3 is 0.5pF, and Tuner1 is 8.7pF.

As shown in FIG. 3 b , the value of Tuner1 changes, and the variation curve 304 of its isolation degree.

As shown in FIG. 3c, Tuner2&3 is 0.5pF, and Tuner1 is 8.7pF. The variation curve 305 of the isolation is shown in FIG. 3c.

As shown in Figure 3a, Figure 3b, and Figure 3c, after adding Tuner1, the isolation of the antenna is significantly improved, so it has the advantage of improving the antenna isolation. In addition, adding Tuner2&3 can tune antenna 1 and antenna 2, and can adjust The resonant frequencies of the 2 antennas.

Optionally, the tuner can be: a variable capacitor or a variable inductor.

Certainly in practical application, the structure of above-mentioned Tuner also can be as shown in Figure 4a, and as shown in Figure 4a, this Tuner comprises: variable capacitance, switch, wherein one end of switch k is connected with antenna radiator 21 (the first end, the second Two terminals or between the first terminal and the second terminal), the other terminal of the switch is connected to one terminal of the variable capacitor, and the other terminal of the variable capacitor is grounded. Optionally, the switch may specifically be a switch tube, such as a mos tube, a triode, and the like.

Of course, in practical applications, the structure of the above-mentioned Tuner can also be as shown in Figure 4b. As shown in Figure 4b, the Tuner includes: a variable capacitor 401, a variable inductance 402, and a selection switch 403, wherein the common terminal of the selection switch Connect the antenna radiator 21 (the first end, the second end or between the first end and the second end), the two selection ends of the selector switch are respectively connected to one end of the variable capacitance and the variable inductance, and the variable capacitance and the variable inductance The other end of the variable inductance is grounded.

In the structure shown in Figure 4b, if the antenna radiator belongs to the tuning of high-frequency signals, its selection switch is connected to the variable inductor; if the antenna radiator belongs to the tuning of low-frequency signals, its selection switch is connected to the variable capacitor.

The present application also provides a smartphone. The smartphone antenna system, as shown in FIG. 2a, includes: an antenna radiator 21, a first signal source 22, a second signal source 23, a first capacitor C1, Capacitor C2 and 1 tuner 208; the antenna system can be multiple according to the number of antennas, for example, 2 antennas, then the number is 2, such as 4 antennas, then the number is 2, such as 8 antennas, then the number 4, such as 12 antennas, the number is 6, such as 16 antennas, the number is 8.

The first end of the antenna radiator 21 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the first signal source 22, the second end of the antenna radiator 21 is connected to one end of the second capacitor C2, and the second capacitor C2 The other end of the antenna radiator 21 is connected to the second signal source 22, a point between the first end and the second end of the antenna radiator 21 is connected to one end of the tuner (Tuner) 1, and the other end of the tuner 1 is grounded.

Referring to Fig. 3a, Fig. 3a is a schematic diagram of the isolation of the antenna system shown in Fig. 2a when the tuner 1 is a 3.7pF capacitor, as shown in Fig. 3a, the curve 303 is the isolation of the antenna system as shown in Fig. 2a schematic diagram. As shown in Figure 3a, the isolation between the antenna 1 and the antenna 2 is improved by the 3.7pF capacitance of the tuner 1.

Referring to FIG. 2b, FIG. 2b is an antenna system provided by an embodiment of the present application. As shown in FIG. 2a, the antenna system includes: an antenna radiator 21, a first signal source 22, a second signal source 23, and a first capacitor C1 , a second capacitor C2, and three tuners;

The first end of the antenna radiator 21 is connected to one end of the first capacitor C1, the other end of the first capacitor C1 is connected to the first signal source 22, the second end of the antenna radiator 21 is connected to one end of the second capacitor C2, and the second capacitor C2 The other end of the antenna radiator 21 is connected to the second signal source 22, a point between the first end and the second end of the antenna radiator 21 is connected to one end of the tuner 1, and the other end of the tuner 1 is grounded; one end of the tuner 2 is connected to the antenna radiation The first end of the body 21 and one end of the tuner 3 are connected to the second end of the antenna radiator 21, and the other ends of the regulator 2 and the tuner 3 are both grounded.

By adjusting Tuner1, the isolation of the antenna can be adjusted, and Tuner2&3 can adjust the resonant frequency of the antenna, so that the antenna can cover different frequency bands, for example: Tuner2&3 is 0.5pF, and Tuner1 is 8.7pF.

As shown in FIG. 3 b , the value of Tuner1 changes, and the variation curve 304 of its isolation degree.

As shown in FIG. 3c, Tuner2&3 is 0.5pF, and Tuner1 is 8.7pF. The variation curve 305 of the isolation is shown in FIG. 3c.

As shown in Figure 3a, Figure 3b, and Figure 3c, after adding Tuner1, the isolation of the antenna is significantly improved, so it has the advantage of improving the antenna isolation. In addition, adding Tuner2&3 can tune antenna 1 and antenna 2, and can adjust The resonant frequencies of the 2 antennas.

Optionally, the tuner can be: a variable capacitor or a variable inductor.

Certainly in practical application, the structure of above-mentioned Tuner also can be as shown in Figure 4a, and as shown in Figure 4a, this Tuner comprises: variable capacitor, switch, wherein one end of switch is connected with antenna radiator 21 (the first end, the second end or between the first end and the second end), the other end of the switch is connected to one end of the variable capacitor, and the other end of the variable capacitor is grounded. Optionally, the switch may specifically be a switch tube, such as a mos tube, a triode, and the like.

Of course, in practical applications, the structure of the above-mentioned Tuner can also be as shown in Figure 4b. As shown in Figure 4b, the Tuner includes: a variable capacitor, a variable inductance, and a selection switch, wherein the common end of the selection switch is connected to the antenna radiation Body 21 (between the first end, the second end or the first end and the second end), the two selection ends of the selection switch are respectively connected to one end of the variable capacitance and the variable inductance, the variable capacitance and the variable inductance The other end of the ground.

In the structure shown in Figure 4b, if the antenna radiator belongs to the tuning of high-frequency signals, its selection switch is connected to the variable inductor; if the antenna radiator belongs to the tuning of low-frequency signals, its selection switch is connected to the variable capacitor.

The above is the implementation of the embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the embodiment of the present application, some improvements and modifications can also be made. These improvements and modifications are also It is regarded as the scope of protection of this application.

Claims (10)

1. An antenna system, comprising: the antenna comprises an antenna radiator, a first signal source, a second signal source, a first capacitor, a second capacitor and a first tuner;

the first end of the antenna radiator is connected with one end of the first capacitor, the other end of the first capacitor is connected with the first signal source, the second end of the antenna radiator is connected with one end of the second capacitor, the other end of the second capacitor is connected with the second signal source, one end of the first tuner is connected with the antenna radiator between the first end and the second end, and the other end of the first tuner is grounded.

2. The antenna system of claim 1, further comprising: a second tuner and a third tuner; wherein,

one end of the second tuner is connected with the first end of the antenna radiator, one end of the third tuner is connected with the second end of the antenna radiator, and the other ends of the second tuner and the third tuner are grounded.

3. The antenna system of claim 1 or 2, wherein the tuner is: variable capacitance or variable inductance.

4. The antenna system of claim 1 or 2, wherein the tuner comprises: a switch and a variable capacitance, the switch being in series with the variable capacitance.

5. The antenna system of claim 4, wherein the switch is a mos transistor or a triode.

6. The antenna system of claim 1 or 2, wherein the tuner comprises: the tuner comprises a selection switch, a variable capacitor and a variable inductor, wherein two selection ends of the selection switch are respectively connected with one end of the variable capacitor and one end of the variable inductor, a common end of the selection switch is connected with one end of the tuner, and the other end of the variable capacitor and the other end of the variable inductor are the other end of the tuner.

7. The antenna system of claim 6, wherein the selection switch is a single pole double throw switch.

8. The antenna system according to claim 1 or 2, characterized in that the antenna radiator is: a flexible circuit board FPC, a laser direct structuring antenna LDS or a printed antenna PDS.

9. An electronic device, characterized in that the electronic device comprises an antenna system according to any of claims 1-8.

10. The electronic device of claim 9, wherein the number of antenna systems is 1, 2, 4, 6, or 8.