Antenna isolation dynamic optimization module and application method thereof

Abstract

The invention discloses an antenna isolation dynamic optimization module and an application method thereof.The antenna isolation dynamic optimization module comprises a first tuning capacitor, a second tuning capacitor, a third tuning capacitor, a tuning switch and a parasitic antenna, and the parasitic antenna is arranged between a first antenna and a second antenna; the first tuning capacitor, the second tuning capacitor and the third tuning capacitor are matched through the tuning switch, induced electric fields on the two sides of the parasitic antenna are converted into induced currents to change the flow direction of the induced currents of two adjacent antenna backflow grounds, and the current connection between the first antenna and the second antenna is interrupted. Therefore, the effect of optimizing the isolation between the two antennas is achieved, the two antennas do not need to be split to stagger frequency bands of the antennas, positions do not need to be selected to enlarge the physical distance between the antennas, and the problem that an existing mode of increasing the isolation of the antennas is limited by the internal space of communication equipment, and the communication equipment is inconvenient to use is solved. And the technical problem of difficulty in application in an actual application scene is solved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an antenna isolation dynamic optimization module and an application method thereof. Background Art

[0002] The existing way to increase antenna isolation is to split the antenna so that the frequency bands of two adjacent antennas are staggered to increase the isolation between the antennas, or to select a location to increase the physical distance between the two antennas to increase the isolation between the antennas. However, in the context of 5G communications, MIMO (Multiple-input Multiple-output) technology is popularized, and the internal space of communication equipment (especially smartphones) is limited, so the above two antenna isolation optimization methods are difficult to achieve. Summary of the invention

[0003] The present invention provides an antenna isolation dynamic optimization module and an application method thereof, which are used to solve the technical problem that the existing method of increasing antenna isolation is limited by the internal space of communication equipment and is difficult to apply in actual application scenarios.

[0004] In view of this, a first aspect of the present invention provides an antenna isolation dynamic optimization module, comprising a first tuning capacitor, a second tuning capacitor, a third tuning capacitor, a tuning switch and a parasitic antenna;

[0005] The parasitic antenna is disposed between the first antenna and the second antenna;

[0006] One end of the first tuning capacitor is connected to the tuning switch, and the other end is connected to the first connection end of the parasitic antenna;

[0007] One end of the third tuning capacitor is connected to the tuning switch, and the other end is connected to the second connection end of the parasitic antenna;

[0008] One end of the second tuning capacitor is respectively connected to the first tuning capacitor and the third tuning capacitor, and the other end is grounded.

[0009] Optionally, the tuning switch includes a tuning switch for the first antenna and a tuning switch for the second antenna;

[0010] One end of the first tuning capacitor is connected to the tuning switch of the first antenna, and one end of the third tuning capacitor is connected to the tuning switch of the second antenna.

[0011] Optionally, the tuning switch of the first antenna is a source branch impedance tuning switch of the first antenna.

[0012] Optionally, the tuning switch of the first antenna is a return branch impedance tuning switch of the first antenna.

[0013] Optionally, the tuning switch of the second antenna is a source branch impedance tuning switch of the second antenna.

[0014] Optionally, the tuning switch of the second antenna is a return branch impedance tuning switch of the second antenna.

[0015] Optionally, one end of the first tuning capacitor is connected to a radio frequency switch pin of the tuning switch, and one end of the third tuning capacitor is connected to another radio frequency switch pin of the tuning switch.

[0016] Optionally, the tuning switch is used to control the working states of the first tuning capacitor, the second tuning capacitor and the third tuning capacitor according to the working states of the first antenna and the second antenna, and the working states of the first antenna and the second antenna include an asynchronous working state and a synchronous working state.

[0017] Optionally, when the first antenna and the second antenna are in an asynchronous working state, the tuning switch of the first antenna is in an open state, and the tuning switch of the second antenna is in a closed state, or the tuning switch of the first antenna is in a closed state, and the tuning switch of the second antenna is in an open state;

[0018] When the first antenna and the second antenna are in a synchronous working state, the tuning switch of the first antenna and the tuning switch of the second antenna are both in an open state or in a closed state at the same time.

[0019] A second aspect of the present invention provides an application method of the antenna isolation dynamic optimization module described in any one of the first aspects, comprising:

[0020] Detecting the working status of the first antenna and the second antenna;

[0021] The working state of the RF switch pin of the tuning switch connected to the first tuning capacitor, the second tuning capacitor and the third tuning capacitor is controlled according to the working state of the first antenna and the second antenna, so that the parasitic antenna interrupts the parallel current of the mainboard between the first antenna and the second antenna, thereby optimizing the isolation between the first antenna and the second antenna.

[0022] It can be seen from the above technical solutions that the antenna isolation dynamic optimization module provided by the present invention has the following advantages:

[0023] The antenna isolation dynamic optimization module provided by the present invention comprises a first tuning capacitor, a second tuning capacitor, a third tuning capacitor, a tuning switch and a parasitic antenna. The parasitic antenna is arranged between the first antenna and the second antenna. The first tuning capacitor, the second tuning capacitor and the third tuning capacitor are matched by the tuning switch, and the induced electric field on both sides of the parasitic antenna is converted into an induced current to change the flow direction of the induced current of the return ground of the two adjacent antennas, and the current connection between the first antenna and the second antenna is interrupted, so as to achieve the effect of optimizing the isolation between the two antennas. There is no need to split the two antennas to stagger the antenna frequency bands, and there is no need to select positions to increase the physical distance between the antennas. The technical problem that the existing method of increasing antenna isolation is limited by the internal space of the communication equipment and is difficult to apply in actual application scenarios is solved.

[0024] The antenna isolation dynamic optimization module provided by the present invention can not only realize antenna isolation optimization in the scenario where the first antenna and the second antenna are equipped with tuning switches, but also realize antenna isolation optimization in the scenario where the first antenna and the second antenna are not equipped with tuning switches. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of an antenna isolation dynamic optimization module provided in the present invention;

[0027] Figure 2 It is a schematic diagram of the current flow direction of existing adjacent antennas;

[0028] Figure 3 A schematic diagram of the current flow of adjacent antennas after the antenna isolation dynamic optimization module provided in the present invention is set;

[0029] Figure 4 A first connection diagram of an antenna isolation dynamic optimization module provided in the present invention;

[0030] Figure 5 A second connection diagram of an antenna isolation dynamic optimization module provided in the present invention;

[0031] Figure 6 A third connection schematic diagram of an antenna isolation dynamic optimization module provided in the present invention;

[0032] Figure 7This is a fourth connection diagram of an antenna isolation dynamic optimization module provided in the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] For easier understanding, see Figure 1 The present invention provides an embodiment of an antenna isolation dynamic optimization module, comprising a first tuning capacitor A, a second tuning capacitor B, a third tuning capacitor C, a tuning switch and a parasitic antenna. The parasitic antenna is arranged between the first antenna and the second antenna, one end of the first tuning capacitor A is connected to the tuning switch, and the other end is connected to the first connection end of the parasitic antenna, one end of the third tuning capacitor C is connected to the tuning switch, and the other end is connected to the second connection end of the parasitic antenna, one end of the second tuning capacitor B is connected to the first tuning capacitor A and the third tuning capacitor C respectively, and the other end is grounded.

[0035] It should be noted that a parasitic antenna is embedded between the first antenna and the second antenna, and then the working states of the first tuning capacitor A, the second tuning capacitor B and the third tuning capacitor C connected to the parasitic antenna are controlled by the tuning switch to change the capacitance value combination so that the parasitic antenna reaches the induced current, so that the parallel current of the mainboard between the first antenna and the second antenna is interrupted, forming a vertical current, and increasing the isolation between the first antenna and the second antenna. For example, when the first antenna and the second antenna are in an asynchronous working state, the tuning capacitor of the parasitic antenna is controlled to be the first tuning capacitor A+the second tuning capacitor B or the second tuning capacitor B+the third tuning capacitor C by controlling the opening state (i.e., ON) and closing state (i.e., OFF) of the RF switch pin of the tuning switch. When the first antenna and the second antenna are in a synchronous working state, the tuning capacitor of the parasitic antenna is controlled to be the second tuning capacitor B or the first tuning capacitor A+the second tuning capacitor B+the third tuning capacitor C by controlling the opening state (i.e., ON) and closing state (i.e., OFF) of the RF switch pin of the tuning switch.

[0036] like Figure 2 FIG. 1 is a schematic diagram of the current flow between the first antenna and the second antenna when the antenna isolation dynamic optimization module provided in the present invention is not introduced. Figure 2It can be seen from the figure that the correlation between the first antenna and the second antenna is very high, and the isolation is poor. After the antenna isolation dynamic optimization module provided in the present invention is introduced, the current flow between the first antenna and the second antenna is shown in the figure below: Figure 3 As shown, from Figure 3 It can be seen that the antenna isolation dynamic optimization module interrupts the current connection between the first antenna and the second antenna, thereby improving the isolation between the first antenna and the second antenna.

[0037] The antenna isolation dynamic optimization module provided by the present invention comprises a first tuning capacitor, a second tuning capacitor, a third tuning capacitor and a parasitic antenna. The parasitic antenna is arranged between the first antenna and the second antenna. The first tuning capacitor, the second tuning capacitor and the third tuning capacitor are matched by a tuning switch, and the induced electric field on both sides of the parasitic antenna is converted into an induced current to change the induced current flow direction of the return ground of the two adjacent antennas, and the current connection between the first antenna and the second antenna is interrupted, thereby achieving the effect of optimizing the isolation between the two antennas. It is not necessary to split the two antennas to stagger the antenna frequency bands, and it is not necessary to select the position to increase the physical distance between the antennas. It solves the technical problem that the existing method of increasing antenna isolation is limited by the internal space of the communication equipment and is difficult to be applied in actual application scenarios.

[0038] In one embodiment, Figure 4 As shown, the tuning switch of the antenna isolation dynamic optimization module in the present invention includes a tuning switch 1 of the first antenna and a tuning switch 2 of the second antenna, one end of the first tuning capacitor A is connected to the tuning switch 1 of the first antenna, and one end of the third tuning capacitor C is connected to the tuning switch 2 of the second antenna. In a specific embodiment, the tuning switch 1 of the first antenna can be a signal source branch impedance tuning switch of the first antenna, that is, Figure 4 As shown, the tuning switch 1 of the first antenna is connected to the source branch position of the first antenna. The tuning switch 1 of the first antenna can also be a return branch impedance tuning switch of the first antenna, that is, Figure 5 As shown, the tuning switch 1 of the first antenna is connected to the return branch position of the first antenna. Similarly, the tuning switch 2 of the second antenna can be a signal source branch impedance tuning switch of the second antenna, such as Figure 4 The tuning switch 2 of the second antenna may also be a return branch impedance tuning switch of the second antenna, such as Figure 5 The control logic of the tuning switch 1 of the first antenna and the tuning switch 2 of the second antenna is shown in Table 1. In another specific embodiment, Figure 6As shown, the tuning switch 1 of the first antenna can be a return branch impedance tuning switch of the first antenna, and the tuning switch 2 of the second antenna can be a source branch impedance tuning switch of the second antenna. Conversely, the tuning switch 1 of the first antenna can also be a source branch impedance tuning switch of the first antenna, and the tuning switch 2 of the second antenna can be a return branch impedance tuning switch of the second antenna.

[0039] Table 1

[0040]

[0041] Considering that the first antenna and the second antenna may not have a tuning switch, in one embodiment of the present invention, the antenna isolation dynamic optimization module needs to be additionally configured with a tuning switch for tuning control, such as Figure 7 As shown, an MXD8723E chip is configured as a separate tuning switch, one end of the first tuning capacitor is connected to an RF switch pin of the tuning switch, and one end of the third tuning capacitor is connected to another RF switch pin of the tuning switch. In the case where the first antenna and the second antenna do not have a tuning switch, the parasitic antenna controls the combination of the first tuning capacitor, the second tuning capacitor and the third tuning capacitor by individually controlling the additionally configured tuning switch to couple the working frequency bands of the first antenna and the second antenna. Through parasitic drainage, the coupled energy is converted into an induced current that flows into the board end ground, thereby optimizing the isolation between the first antenna and the second antenna.

[0042] The present invention provides an application method of any antenna isolation dynamic optimization module in each antenna isolation dynamic optimization module embodiment of the present invention, comprising:

[0043] Step S1: Detect the working status of the first antenna and the second antenna.

[0044] It should be noted that the detection device detects whether the working state of the first antenna and the second antenna is a synchronous working state or an asynchronous working state.

[0045] Step S2, controlling the working state of the RF switch pin of the tuning switch connected to the first tuning capacitor, the second tuning capacitor and the third tuning capacitor according to the working state of the first antenna and the second antenna, so that the parasitic antenna interrupts the parallel current of the mainboard between the first antenna and the second antenna, thereby optimizing the isolation between the first antenna and the second antenna.

[0046] It should be noted that, depending on whether the first antenna and the second antenna are in a synchronous working state or an asynchronous working state, the working state (i.e., ON / OFF) of the RF switch pin connected to the first tuning capacitor, the second tuning capacitor and the third tuning capacitor of the tuning switch is controlled respectively, so that the parasitic antenna interrupts the parallel current of the mainboard between the first antenna and the second antenna, thereby increasing the isolation between the first antenna and the second antenna.

[0047] The principle of the application method of the antenna isolation dynamic optimization module provided in the present invention has been explained in the embodiments of the antenna isolation dynamic optimization module provided in the present invention, and will not be repeated here.

[0048] The terms "first", "second", "third", etc. in the specification of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An antenna isolation dynamic optimization module, characterized in that: It includes a first tuning capacitor, a second tuning capacitor, a third tuning capacitor, a tuning switch and a parasitic antenna; The parasitic antenna is disposed between the first antenna and the second antenna; One end of the first tuning capacitor is connected to the tuning switch, and the other end is connected to the first connection end of the parasitic antenna; One end of the third tuning capacitor is connected to the tuning switch, and the other end is connected to the second connection end of the parasitic antenna; One end of the second tuning capacitor is respectively connected to the first tuning capacitor and the third tuning capacitor, and the other end is grounded.

2. The antenna isolation dynamic optimization module according to claim 1, characterized in that: The tuning switch includes a tuning switch for the first antenna and a tuning switch for the second antenna; One end of the first tuning capacitor is connected to the tuning switch of the first antenna, and one end of the third tuning capacitor is connected to the tuning switch of the second antenna.

3. The antenna isolation dynamic optimization module according to claim 2, characterized in that: The tuning switch of the first antenna is a source branch impedance tuning switch of the first antenna.

4. The antenna isolation dynamic optimization module according to claim 2, characterized in that: The tuning switch of the first antenna is a return branch impedance tuning switch of the first antenna.

5. The antenna isolation dynamic optimization module according to claim 2, characterized in that: The tuning switch of the second antenna is a signal source branch impedance tuning switch of the second antenna.

6. The antenna isolation dynamic optimization module according to claim 2, characterized in that: The tuning switch of the second antenna is a return branch impedance tuning switch of the second antenna.

7. The antenna isolation dynamic optimization module according to claim 1, characterized in that: One end of the first tuning capacitor is connected to a radio frequency switch pin of the tuning switch, and one end of the third tuning capacitor is connected to another radio frequency switch pin of the tuning switch.

8. The antenna isolation dynamic optimization module according to any one of claims 2 to 6, characterized in that: The tuning switch is used to control the working states of the first tuning capacitor, the second tuning capacitor and the third tuning capacitor according to the working states of the first antenna and the second antenna. The working states of the first antenna and the second antenna include an asynchronous working state and a synchronous working state.

9. The antenna isolation dynamic optimization module according to claim 8, characterized in that: When the first antenna and the second antenna are in an asynchronous working state, the tuning switch of the first antenna is in an open state, and the tuning switch of the second antenna is in a closed state, or the tuning switch of the first antenna is in a closed state, and the tuning switch of the second antenna is in an open state; When the first antenna and the second antenna are in a synchronous working state, the tuning switch of the first antenna and the tuning switch of the second antenna are both in an open state or in a closed state at the same time.

10. An application method of the antenna isolation dynamic optimization module according to any one of claims 1 to 9, characterized in that: include: Detecting the working status of the first antenna and the second antenna; The working state of the RF switch pin of the tuning switch connected to the first tuning capacitor, the second tuning capacitor and the third tuning capacitor is controlled according to the working state of the first antenna and the second antenna, so that the parasitic antenna interrupts the parallel current of the mainboard between the first antenna and the second antenna, thereby optimizing the isolation between the first antenna and the second antenna.

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