Antenna isolation dynamic optimization module and application method thereof

Abstract

The present invention discloses an antenna isolation dynamic optimization module and an application method thereof. The antenna isolation dynamic optimization module includes 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. The induced electric field on both sides of the parasitic antenna is converted into an induced current to change the direction of the induced current 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. There is no need to split the two antennas to stagger the antenna frequency bands, nor is there any need to select positions to increase the physical distance between the antennas. This 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 apply in actual application scenarios.

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] Existing methods for increasing antenna isolation include splitting the antennas to offset the frequency bands of adjacent antennas, or increasing the physical distance between the antennas to increase isolation. However, with the widespread adoption of MIMO (Multiple-Input Multiple-Output) technology in 5G communications and the limited internal space available in communications devices (especially smartphones), these two antenna isolation optimization methods are difficult to implement. 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 asynchronous working states and synchronous working states.

[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 simultaneously in an open state or simultaneously in a closed state.

[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 operating 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] From the above technical solutions, it can be seen 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 includes 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. 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 in 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. There is no need to split the two antennas to stagger the antenna frequency bands, nor is there any need to select positions to increase the physical distance between the antennas. This 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 apply in actual application scenarios.

[0024] The antenna isolation dynamic optimization module provided by the present invention can not only optimize the antenna isolation in a scenario where the first antenna and the second antenna have their own tuning switches, but also optimize the antenna isolation in a scenario where the first antenna and the second antenna do not have 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

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

[0027] Figure 2 This is a schematic diagram of the current flow between 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 This is a first connection diagram of an antenna isolation dynamic optimization module provided in the present invention;

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

[0031] Figure 6 This is a third connection 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 solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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 making creative efforts shall fall within the scope of protection of the present invention.

[0034] For easier understanding, see Figure 1 The present invention provides an embodiment of a dynamic antenna isolation 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 disposed 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 and second antennas. A tuning switch is then used to control the operating states of the first, second, and third tuning capacitors A, B, and C connected to the parasitic antenna, thereby varying the capacitance combination to induce current in the parasitic antenna. This interrupts the parallel current flowing through the motherboard between the first and second antennas, creating a perpendicular current flow and increasing isolation between the first and second antennas. For example, when the first and second antennas are operating asynchronously, the tuning capacitors of the parasitic antenna are controlled to either 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 RF switch pin of the tuning switch between the on (i.e., ON) and off (i.e., OFF) states. When the first and second antennas are operating synchronously, the tuning capacitors of the parasitic antenna are 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 RF switch pin of the tuning switch between the on (i.e., ON) and off (i.e., OFF) states.

[0036] like Figure 2 As shown in FIG, 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 by 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 from the figure 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 includes a first tuning capacitor, a second tuning capacitor, a third tuning capacitor, and a parasitic antenna. The parasitic antenna is positioned between the first and second antennas. A tuning switch is used to match the first, second, and third tuning capacitors. This converts the induced electric field on either side of the parasitic antenna into an induced current, which changes the direction of the induced current flowing back to the adjacent antennas, disrupting the current connection between the first and second antennas. This optimizes the isolation between the two antennas without splitting the two antennas to stagger their frequency bands or selecting locations to increase the physical distance between them. This solves the technical problem that existing methods for increasing antenna isolation are limited by the internal space of communication equipment, making them difficult to implement in practical 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 for the first antenna and a tuning switch 2 for 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 signal 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 the signal source branch impedance tuning switch of the second antenna, such as Figure 4 The tuning switch 2 of the second antenna can also be a return branch impedance tuning switch of the second antenna, as shown in FIG. 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, as Figure 6As shown, the tuning switch 1 of the first antenna can be the impedance tuning switch for the return branch of the first antenna, and the tuning switch 2 of the second antenna can be the impedance tuning switch for the source branch of the second antenna. Conversely, the tuning switch 1 of the first antenna can be the impedance tuning switch for the source branch of the first antenna, and the tuning switch 2 of the second antenna can be the impedance tuning switch for the return branch 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. When the first and second antennas do not have tuning switches, the parasitic antenna controls the combination of the first, second, and third tuning capacitors by independently controlling the additional tuning switch to couple the operating frequency bands of the first and second antennas. Through parasitic current drainage, the coupled energy is converted into an induced current that flows into the board ground, optimizing the isolation between the first and second antennas.

[0042] The present invention provides an application method for any of the antenna isolation dynamic optimization modules in the embodiments of the present invention, including:

[0043] Step S1: Detecting 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: Control 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 motherboard 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 of the tuning switch connected to the first tuning capacitor, the second tuning capacitor, and the third tuning capacitor 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 described 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," and the like in the description of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions, e.g., a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[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 above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features thereof can 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 connected to the first tuning capacitor and the third tuning capacitor respectively, and the other end is grounded; 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; The tuning switch of the first antenna is a source branch impedance tuning switch of the first antenna or a return branch impedance tuning switch of the first antenna; The tuning switch of the second antenna is a source branch impedance tuning switch of the second antenna or the tuning switch of the second antenna is a return branch impedance tuning switch of the second antenna; 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; 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 simultaneously in an open state or simultaneously in a closed state.

2. 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.

3. An application method of the antenna isolation dynamic optimization module according to any one of claims 1 to 2, characterized in that: include: detecting the operating 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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