CN209402500U - A dual-antenna switching circuit and a dual-antenna switching device - Google Patents

Abstract

The present application belongs to the field of antenna technology, and provides a dual-antenna switching circuit and a dual-antenna switching device. The dual-antenna switching circuit includes: used to receive a control signal, and output a first switching control signal and a second switching control signal according to the control signal. A signal switching module; a first diode switch module used to control the turn-on or turn-off of the first antenna signal according to the first switch control signal; used to control the turn-on or turn-off of the second antenna signal according to the second switch control signal A second diode switch module that is turned off; and an output module for receiving the first antenna signal or the second antenna signal and outputting an effective antenna signal to the receiver, so as to realize the connection between the first antenna signal and the second antenna signal Switching solves the problem that when the ordinary transistor switch switching circuit switches the antenna signal, it will cause the sensitivity of the receiver to drop and affect the signal receiving effect of the receiver.

Description

A dual-antenna switching circuit and a dual-antenna switching device

technical field

The embodiments of the present application belong to the technical field of antennas, and in particular relate to a dual-antenna switching circuit and a dual-antenna switching device.

Background technique

The multipath effect means that the receiver receives multiple signals reflected from the same transmission tower or multiple signals from different transmission towers. These signals arrive at the receiver at different times because of the different paths they travel, resulting in signals before and after the signal. overlapping phenomenon. During the working process of the vehicle-mounted receiver, the transmission direction of electromagnetic waves will be changed due to the walls of buildings, corridors, trees, human bodies and high mountains, resulting in the superposition effect of waves, which seriously produces harsh "puff..." sound, which seriously affects Listening quality, upsetting the listener.

In order to solve this problem, two antennas are usually used for signal reception, and the receiver compares the signal strength received by the two antennas in real time, and selects a channel with good signal quality for signal reception, so as to avoid the multipath effect. However, when the ordinary transistor switching circuit is used to switch the antenna signal, the radio frequency signal will be separated from the line transmission due to the connection of the transistor, and part of the radio frequency signal will be radiated into the air, resulting in a decrease in receiver sensitivity and affecting the signal reception effect of the receiver.

Contents of the invention

The embodiment of the present application provides a dual-antenna switching circuit and a dual-antenna switching device, aiming to solve the problem that when a common transistor switching circuit switches antenna signals, the sensitivity of the receiver will decrease and the signal receiving effect of the receiver will be affected.

An embodiment of the present application provides a dual-antenna switching circuit, which is connected to a control signal source, a first antenna, a second antenna, and a receiver. The dual-antenna switching circuit includes:

A switching module connected to the control signal source for receiving a control signal output by the control signal source, and outputting a first switching control signal and a second switching control signal according to the control signal;

respectively connected to the switching module and the first antenna, for receiving the first switching control signal and the first antenna signal output by the first antenna, and controlling the first switching module according to the first switching control signal A first diode switch module for turning on or off the antenna signal;

respectively connected to the switching module and the second antenna, for receiving the second switching control signal and the second antenna signal output by the second antenna, and controlling the second antenna according to the second switching control signal a second diode switch module for turning on or off the two antenna signals; and

respectively connected with the first diode switch module, the second diode switch module and the receiver, for receiving the first antenna signal or the second antenna signal, and sending The output module of the machine to output the effective antenna signal.

Optionally, the dual-antenna switching circuit also includes:

A first filtering module connected to the first antenna and configured to receive the first antenna signal and filter the first antenna signal;

A second filtering module connected to the second antenna for receiving the second antenna signal and performing filtering processing on the second antenna signal.

Optionally, the dual-antenna switching circuit also includes:

respectively connected to the switch module and the second diode switch module for receiving the first switch signal and transmitting the first switch signal to the first switch module of the second diode switch module signal channel;

respectively connected to the switch module and the first diode switch module, for receiving a second switch signal, and transmitting the second switch signal to the second signal channel of the first diode switch module .

Optionally, the switching module includes:

a supply voltage source for providing a supply voltage signal;

A first signal processing unit connected to the control signal source for receiving the control signal and converting the control signal into a corresponding control voltage signal;

A second signal processing unit connected to the supply voltage source for receiving the supply voltage signal and converting the supply voltage signal into a corresponding first voltage signal and a second voltage signal;

respectively connected to the first signal processing unit and the second signal processing unit, for receiving the first voltage signal and the control voltage signal, and outputting the corresponding first switching signal and the first switching signal according to the control voltage signal a first switching unit that inverts the switching signal; and

respectively connected to the second signal processing unit and the first switching unit, for receiving the second voltage signal and the first inverted switching signal, and outputting a corresponding A second switching unit for the second switching signal.

Optionally, the first signal processing unit includes: a first resistor, a second resistor, a third resistor, and a first capacitor;

The first end of the first resistor is connected to the control signal source, the second end of the first resistor, the first end of the first capacitor, and the first end of the second resistor are connected in common, so The second terminal of the second resistor and the first terminal of the third resistor are commonly connected to the first switching unit, and the second terminal of the first capacitor is commonly connected to the second terminal of the third resistor. land.

Optionally, the second signal processing unit includes: a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor;

The first end of the fourth resistor is connected to the power supply voltage source, the second end of the fourth resistor, the first end of the fifth resistor, and the first end of the second capacitor are connected in common, so The second terminal of the fifth resistor and the first terminal of the third capacitor are commonly connected to the second switching unit, and the second terminal of the second capacitor is commonly connected to the second terminal of the third capacitor. land.

Optionally, the first switching unit includes: a first signal conversion chip, a seventh resistor, and a first inductor;

The control signal input terminal of the first signal conversion chip is connected to the first signal processing unit, the power supply terminal of the first signal conversion chip is connected to the second signal processing unit, and the power supply terminal of the first signal conversion chip is connected to the second signal processing unit. The ground end is grounded, the signal output end of the first signal conversion chip is connected to the first end of the seventh resistor, and the inverted signal output end of the first signal conversion chip is connected to the second switching unit, so The second end of the seventh resistor is connected to the first end of the first inductance, and the second end of the first inductance is connected to the first diode switch module;

The second switching unit includes: a second signal conversion chip, an eighth resistor, a ninth resistor, and a second inductor;

The control signal input terminal of the second signal conversion chip and the first terminal of the ninth resistor are commonly connected to the first switching unit, and the power supply terminal of the second signal conversion chip is connected to the first terminal of the ninth resistor. The two ends are commonly connected to the second signal processing unit, the output end of the second signal conversion chip is connected to the first end of the eighth resistor, the ground end of the second signal conversion chip is grounded, and the first end of the second signal conversion chip is connected to the ground. The output terminal of the anti-phase signal of the two-signal conversion chip is suspended in the air.

Optionally, the first diode module includes: a sixth capacitor, a seventh capacitor, a third inductor, a first diode, a second diode, an eighth capacitor, and a fourth inductor;

The first end of the sixth capacitor is connected to the first antenna, the second end of the sixth capacitor, the first end of the seventh capacitor, and the anode of the first diode are connected to the switch Module connection, the second end of the seventh capacitor is connected to the first end of the third inductance, the second end of the third inductance, the cathode of the first diode, the eighth capacitor The first end and the anode of the second diode are connected in common, the second end of the eighth capacitor is connected to the first end of the fourth inductor, and the cathode of the second diode is connected to the first end of the second diode. The second ends of the four inductors are commonly connected to the output module.

The second diode module includes: a ninth capacitor, a tenth capacitor, a fifth inductor, a third diode, an eleventh capacitor, a fourth diode, and a sixth inductor;

The first end of the ninth capacitor is connected to the second antenna, the second end of the ninth capacitor, the first end of the tenth capacitor, and the anode of the third diode are commonly connected to the In the switching module, the second end of the tenth capacitor is connected to the fifth inductance, the second end of the fifth inductance, the cathode of the third diode, and the first end of the eleventh capacitor end and the anode of the fourth diode are connected in common, the second end of the eleventh capacitor is connected to the first end of the sixth inductance, the cathode of the fourth diode is connected to the sixth The second end of the inductor is commonly connected to the output module.

Optionally, the output module includes:

The twelfth capacitor, the seventh inductance, and the tenth resistor;

The first end of the seventh inductor and the first end of the twelfth capacitor are commonly connected to the first diode switch module, and the second end of the seventh inductor is connected to the first end of the tenth resistor. connected at one end, the second end of the tenth resistor is grounded, and the second end of the twelfth capacitor is connected with the receiver.

The present application also provides a dual-antenna switching device, which includes: a control signal source; a first antenna; a second antenna; a receiver; and the dual-antenna switching circuit described in any one of the above, the The dual-antenna switching circuit is connected to the control signal source, the first antenna, the second antenna and the receiver.

In the embodiment of the present application, the switch module controls the first diode switch module and the second diode switch module, thereby realizing the switch between the first antenna signal and the second antenna signal, and solving the problem of the common transistor switch When the switching circuit switches the antenna signal, it will cause the sensitivity of the receiver to drop and affect the signal receiving effect of the receiver.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic structural diagram of a dual-antenna switching circuit provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application;

FIG. 3 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application;

FIG. 4 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application;

Fig. 5 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the application, the technical solution in the embodiment of the application will be clearly described below in conjunction with the drawings in the embodiment of the application. Obviously, the described embodiment is the Some examples, but not all examples. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

The terms "comprising" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. For example, a process, method or system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally further includes Other steps or units inherent in these processes, methods, products or apparatus. In addition, the terms "first", "second", and "third", etc. are used to distinguish different objects, not to describe a specific order.

FIG. 1 is a schematic structural diagram of a dual-antenna switching circuit provided by an embodiment of the present application. Referring to FIG. And the receiver 40 is connected.

Specifically, the dual-antenna switching circuit includes:

A switching module 50 connected to the control signal source 10 for receiving a control signal output by the control signal source 10, and outputting a first switching control signal and a second switching control signal according to the control signal;

respectively connected to the switching module 50 and the first antenna 20, for receiving the first switching control signal and the first antenna signal output by the first antenna, and controlling the first antenna signal according to the first switching control signal A first diode switch module 60 for turning on or off the first antenna signal;

respectively connected to the switching module 50 and the second antenna 30, for receiving the second switching control signal and the second antenna signal output by the second antenna, and controlling the second antenna according to the second switching control signal The second diode switch module 70 for turning on or off the second antenna signal; and

respectively connected to the first diode switch module 60, the second diode switch module 70 and the receiver 40, for receiving the first antenna signal or the second antenna signal, and sending The receiver outputs an output module 80 of valid antenna signals.

In this embodiment, the first antenna 20 and the second antenna 30 are used to receive the first antenna signal and the second antenna signal respectively, and the first diode switch module 60 is used to control the first antenna 20 according to the first switching control signal The connection state between the second antenna 30 and the output module 80, the second diode switch module 70 is used to control the connection state between the second antenna 30 and the output module 80 according to the second switching control signal, wherein, when the first switching control signal controls When the first diode switch module 60 is turned on and the first antenna 20 is electrically connected to the output module 80, the second switching control signal controls the second diode switch module 60 to turn off, and at this time the second antenna 30 and the output module 80 are electrically connected. The output modules 80 are kept disconnected, so that the receiver 40 only receives the first antenna signal; when the first switching control signal controls the second diode switch module 60 to turn off, the connection between the first antenna 20 and the output module 80 When kept disconnected, the second switching control signal controls the second diode switch module 60 to be turned on. At this time, the second antenna 30 is electrically connected to the output module, so that the receiver 40 only receives the second antenna. signal, so that the signal received by the receiver 40 can be switched between the first antenna signal and the second antenna signal according to the control signal.

In one embodiment, when the first switching control signal is at a high level, the second switching control signal is at a low level. At this time, the first diode switch module 60 is turned on, and the second diode switch module 70 is turned off. off; when the first switch control signal is at low level, the second switch control signal is at high level, at this time, the first diode switch module 60 is turned off, and the second diode switch module 70 is turned on, so that Only one of the first diode switch module 60 and the second diode switch module 70 is turned on during operation.

In one application, the control signal source 10 can be a host computer, and the host computer can obtain the first antenna signal and the second antenna signal, and compare the strengths of the first antenna signal and the second antenna signal, so as to output the corresponding The control signal is used to select the antenna signal with higher signal strength as the received signal of the receiver 40, so as to avoid the multipath effect caused by the receiver receiving multiple antenna signals at the same time.

FIG. 2 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application. Referring to FIG. 2, the dual-antenna switching circuit further includes:

A first filtering module 91 connected to the first antenna 20 for receiving the first antenna signal and performing filtering processing on the first antenna signal;

A second filtering module 92 connected to the second antenna 30 for receiving the second antenna signal and performing filtering processing on the second antenna signal.

FIG. 3 is a schematic structural diagram of a dual-antenna switching circuit provided by another embodiment of the present application. Referring to FIG. 3 , the dual-antenna switching circuit further includes:

respectively connected to the switch module 50 and the second diode switch module 70 for receiving the first switch signal and transmitting the first switch signal to the second diode switch module 70 The first signal channel 61;

respectively connected to the switch module 50 and the first diode switch module 70, for receiving a second switch signal, and transmitting the second switch signal to the second switch module of the first diode switch module. Signal channel 71.

In this embodiment, when the second diode switch module 70 is turned off after receiving the second switch control signal, the second diode switch module 70 receives the first switch control signal through the first signal channel 61, which can Further suppress the conduction of the second antenna signal in the second antenna 30, thereby enhancing the turn-off effect of the second diode switch module 70, avoiding the leakage of the second antenna signal to the output module 80, so that the sensitivity of the receiver will not be affected influences. When the first diode switch module 60 is turned off after receiving the first switch control signal, the first diode switch module 60 receives the second switch control signal through the second signal channel 71, which can further suppress the first antenna 20 The conduction of the first antenna signal, thereby enhancing the turn-off effect of the first diode switch module 60, prevents the first antenna signal from leaking to the output module 80, so that the sensitivity of the receiver will not be affected.

FIG. 4 is a schematic structural diagram of a dual-antenna switching circuit provided by an embodiment of the present application. Referring to FIG. 4, the switching module 50 includes:

a supply voltage source 51 for providing a supply voltage signal;

A first signal processing unit 52 connected to the control signal source 10 for receiving the control signal and converting the control signal into a corresponding control voltage signal;

A second signal processing unit 53 connected to the supply voltage source 51 for receiving the supply voltage signal and converting the supply voltage signal into a corresponding first voltage signal and a second voltage signal;

Connected to the first signal processing unit 52 and the second signal processing unit 53 respectively, for receiving the first voltage signal and the control voltage signal, and outputting the corresponding first switching signal and the first switching unit 54 of the first inverted switching signal; and

Connected to the second signal processing unit 53 and the first switching unit 54 respectively, for receiving the second voltage signal and the first inverting switching signal, and outputting according to the first inverting switching signal The second switching unit 55 corresponding to the second switching signal.

In this embodiment, the first signal processing unit 52 converts the control signal output by the control signal source 10 into a corresponding control voltage signal, thereby driving the first switching unit 54 to output the first switching signal and the first inverted switching signal, wherein , the first anti-phase switching signal is processed by the second switching unit 55 to output the corresponding second switching signal, so that the first switching signal controls the first diode switch module 60, and the second switching signal controls the second diode switch Purpose of module 70.

In one embodiment, the levels of the first switching signal and the first inverted switching signal are opposite. Specifically, if the first switching signal is at a high level, then the first inverted switching signal is at a low level. If the first If the switching signal is at low level, then the first inverted switching signal is at high level.

FIG. 5 is a schematic structural diagram of a dual-antenna switching circuit provided by an embodiment of the present application. Referring to FIG. 5, the first signal processing unit 52 includes: a first resistor R1, a second resistor R2, a third resistor R3 and The first capacitor C1;

The first end of the first resistor R1 is connected to the control signal source 10, the second end of the first resistor R1, the first end of the first capacitor C1 and the first end of the second resistor R2 The second end of the second resistor R2 and the first end of the third resistor R3 are commonly connected to the first switching unit 54, and the second end of the first capacitor C1 is connected to the first end of the first capacitor C1. The second terminals of the three resistors R3 are commonly connected to the ground.

In one embodiment, as shown in FIG. 5 , the second signal processing unit 53 includes: a fourth resistor R4, a fifth resistor R5, a second capacitor C2, and a third capacitor C3;

The first end of the fourth resistor R4 is connected to the supply voltage source 51, the second end of the fourth resistor R4, the first end of the fifth resistor R5 and the first end of the second capacitor C2 The second end of the fifth resistor R5 and the first end of the third capacitor C3 are commonly connected to the second switching unit 55, and the second end of the second capacitor C2 is connected to the first end of the third capacitor C3. The second terminals of the three capacitors C3 are commonly connected to the ground.

In one embodiment, as shown in FIG. 5 , the first switching unit 54 includes: a first signal conversion chip U1, a seventh resistor R7, and a first inductor L1;

The control signal input terminal CON1 of the first signal conversion chip U1 is connected to the first signal processing unit 52, the power supply terminal VCC1 of the first signal conversion chip U1 is connected to the second signal processing unit 53, and the The ground terminal GND1 of the first signal conversion chip U1 is grounded, the signal output terminal OUT1 of the first signal conversion chip U1 is connected to the first end of the seventh resistor R7, and the inverted signal of the first signal conversion chip U1 The output end C&B1 is connected to the second switching unit, the second end of the seventh resistor R7 is connected to the first end of the first inductor L1, the second end of the first inductor L1 is connected to the first The diode switch module 60 is connected;

In one embodiment, as shown in FIG. 5 , the second switching unit 55 includes: a second signal conversion chip U2, an eighth resistor R8, a ninth resistor R9, and a second inductor L2;

The control signal input terminal CON2 of the second signal conversion chip U2 and the first terminal of the ninth resistor R9 are commonly connected to the first switching unit 54, and the power supply terminal VCC2 of the second signal conversion chip U2 is connected to the first terminal of the ninth resistor R9. The second terminal of the ninth resistor R9 is commonly connected to the second signal processing unit 53, the output terminal OUT2 of the second signal conversion chip U2 is connected to the first terminal of the eighth resistor R8, and the second The ground terminal GND2 of the signal conversion chip U2 is grounded, and the inverted signal output terminals C&B2 of the second signal conversion chip U2 are suspended.

In one embodiment, as shown in FIG. 5, the first diode module 60 includes: a sixth capacitor C6, a seventh capacitor C7, a third inductor L3, a first diode D1, a second diode D2, the eighth capacitor C8 and the fourth inductor L4;

The first end of the sixth capacitor C6 is connected to the first antenna 20, the second end of the sixth capacitor C6, the first end of the seventh capacitor C7, and the first end of the first diode D1 The anode is connected to the switching module 50, the second end of the seventh capacitor C7 is connected to the first end of the third inductance L3, the second end of the third inductance L3, the first diode The cathode of D1, the first end of the eighth capacitor C8 and the anode of the second diode D2 are commonly connected, and the second end of the eighth capacitor C8 is connected to the first end of the fourth inductor L4 , the cathode of the second diode D2 and the second end of the fourth inductor L4 are commonly connected to the output module 80 .

In one embodiment, as shown in FIG. 5 , the second diode module 70 includes: a ninth capacitor C9, a tenth capacitor C10, a fifth inductor L5, a third diode D3, and an eleventh capacitor C11 , the fourth diode D4 and the sixth inductor L6;

The first end of the ninth capacitor C9 is connected to the second antenna 30, the second end of the ninth capacitor C9, the first end of the tenth capacitor C10 and the third diode D3 The anode is commonly connected to the switching module 50, the second end of the tenth capacitor C10 is connected to the fifth inductance L5, the second end of the fifth inductance L5 is connected to the cathode of the third diode D3 , the first end of the eleventh capacitor C11 and the anode of the fourth diode D4 are commonly connected, the second end of the eleventh capacitor C11 is connected to the first end of the sixth inductor L6, The cathode of the fourth diode D4 and the second end of the sixth inductor L6 are commonly connected to the output module 80 .

In one embodiment, as shown in FIG. 5 , the first signal channel 61 includes: a sixth diode D6, an eleventh resistor R11, and a fourteenth capacitor C14; wherein, the first terminal of the eleventh resistor R11 is connected to The switch module 50 is connected, the second end of the eleventh resistor R11, the anode of the sixth diode D6, and the first end of the fourteenth capacitor C14 are commonly connected, the second end of the fourteenth capacitor C14 is grounded, and the sixth two The cathode of the diode D6 is connected to the second diode switching module 70 .

In one embodiment, as shown in FIG. 5 , the cathode of the sixth diode D6, the second end of the eleventh capacitor C11 and the first end of the sixth inductor L6 are commonly connected.

In one embodiment, as shown in FIG. 5 , the second signal channel 71 includes: a twelfth resistor R12, a fifth diode D5, and a thirteenth capacitor C13; wherein, the first end of the twelfth resistor R12 is connected to The switching module 50 is connected, the second end of the twelfth resistor R12, the anode of the fifth diode D5 and the first end of the thirteenth capacitor C13 are connected together, the second end of the thirteenth capacitor C13 is grounded, and the fifth and second The cathode of the diode D5 is connected to the first diode switch module 60 .

In one embodiment, as shown in FIG. 5 , the cathode of the fifth diode D5, the second end of the eighth capacitor C8, and the first end of the fourth inductor L4 are commonly connected.

In one embodiment, as shown in FIG. 5, the first filter module 91 includes a fifteenth capacitor C15, wherein the first end of the fifteenth capacitor C15 is connected to the first end of the first filter module 91, and the fifteenth capacitor C15 is connected to the first end of the first filter module 91. The second end of the capacitor C15 is connected to the second end of the first filtering module 91 .

In one embodiment, as shown in FIG. 5, the second filtering module 92 includes a sixteenth capacitor C16, wherein the first end of the sixteenth capacitor C16 is connected to the first end of the second filtering module 92, and the sixteenth The second end of the capacitor C16 is connected to the second end of the second filtering module 92 .

In one embodiment, as shown in FIG. 5, the output module 80 includes:

The twelfth capacitor C12, the seventh inductance C7, and the tenth resistor C10;

The first end of the seventh inductor L7 and the first end of the twelfth capacitor C12 are commonly connected to the first diode switch module 60, and the second end of the seventh inductor L7 is connected to the first end of the twelfth capacitor C12. The first end of the tenth resistor R10 is connected to the ground, the second end of the tenth resistor R10 is connected to the ground, and the second end of the twelfth capacitor C12 is connected to the receiver 40 .

In the embodiment of the present application, the junction capacitance of the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are small, and the forward resistance is large, which can completely block the radio frequency leakage, without It will reduce the sensitivity of the receiver, can realize fast switching between antennas, and solve the multipath interference problem of the receiver. Moreover, there is no active amplifying circuit in the dual-antenna switching circuit in the present application, and self-excited howling will not occur.

The present application also provides a dual-antenna switching device, which includes: a control signal source; a first antenna; a second antenna; a receiver; and the dual-antenna switching circuit described in any one of the above, the The dual-antenna switching circuit is connected to the control signal source, the first antenna, the second antenna and the receiver.

An embodiment of the present application provides a dual-antenna switching circuit and a dual-antenna switching device. The dual-antenna switching circuit includes: for receiving a control signal output by the control signal source, and outputting a first switching control signal according to the control signal. A switching module for signals and second switching control signals; used to receive the first switching control signal and the first antenna signal output by the first antenna, and control the first antenna signal according to the first switching control signal A first diode switch module that is turned on or off; for receiving the second switching control signal and the second antenna signal output by the second antenna, and controlling the second switching control signal according to the second switching control signal A second diode switch module for turning on or off the second antenna signal; and an output module for receiving the first antenna signal or the second antenna signal and outputting an effective antenna signal to the receiver , through the switching module to control the first diode switch module and the second diode switch module, so as to realize the switching between the first antenna signal and the second antenna signal, which solves the problem of ordinary transistor switch switching circuit for antenna signal When switching, it will cause the sensitivity of the receiver to drop, which will affect the signal receiving effect of the receiver.

The above descriptions are only optional embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims (10)

1. A dual-antenna switching circuit is connected with a control signal source, a first antenna, a second antenna and a receiver, wherein the dual-antenna switching circuit comprises: A switching module connected to the control signal source for receiving a control signal output by the control signal source, and outputting a first switching control signal and a second switching control signal according to the control signal; respectively connected to the switching module and the first antenna, for receiving the first switching control signal and the first antenna signal output by the first antenna, and controlling the first switching module according to the first switching control signal A first diode switch module for turning on or off the antenna signal; respectively connected to the switching module and the second antenna, for receiving the second switching control signal and the second antenna signal output by the second antenna, and controlling the second antenna according to the second switching control signal a second diode switch module for turning on or off the two antenna signals; and respectively connected with the first diode switch module, the second diode switch module and the receiver, for receiving the first antenna signal or the second antenna signal, and sending The output module of the machine to output the effective antenna signal. 2. The dual-antenna switching circuit according to claim 1, wherein the dual-antenna switching circuit further comprises: A first filtering module connected to the first antenna and configured to receive the first antenna signal and filter the first antenna signal; A second filtering module connected to the second antenna for receiving the second antenna signal and performing filtering processing on the second antenna signal. 3. The dual-antenna switching circuit according to claim 1, wherein the dual-antenna switching circuit further comprises: respectively connected to the switch module and the second diode switch module for receiving the first switch signal and transmitting the first switch signal to the first switch module of the second diode switch module signal channel; respectively connected to the switch module and the first diode switch module, for receiving a second switch signal, and transmitting the second switch signal to the second signal channel of the first diode switch module . 4. The dual-antenna switching circuit according to claim 1, wherein the switching module comprises: a supply voltage source for providing a supply voltage signal; A first signal processing unit connected to the control signal source for receiving the control signal and converting the control signal into a corresponding control voltage signal; A second signal processing unit connected to the supply voltage source for receiving the supply voltage signal and converting the supply voltage signal into a corresponding first voltage signal and a second voltage signal; respectively connected to the first signal processing unit and the second signal processing unit, for receiving the first voltage signal and the control voltage signal, and outputting the corresponding first switching signal and the first switching signal according to the control voltage signal a first switching unit that inverts the switching signal; and respectively connected to the second signal processing unit and the first switching unit, for receiving the second voltage signal and the first inverted switching signal, and outputting a corresponding A second switching unit for the second switching signal. 5. The dual-antenna switching circuit according to claim 4, wherein the first signal processing unit comprises: a first resistor, a second resistor, a third resistor, and a first capacitor; The first end of the first resistor is connected to the control signal source, the second end of the first resistor, the first end of the first capacitor, and the first end of the second resistor are connected in common, so The second terminal of the second resistor and the first terminal of the third resistor are commonly connected to the first switching unit, and the second terminal of the first capacitor is commonly connected to the second terminal of the third resistor. land. 6. The dual-antenna switching circuit according to claim 4, wherein the second signal processing unit comprises: a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor; The first end of the fourth resistor is connected to the power supply voltage source, the second end of the fourth resistor, the first end of the fifth resistor, and the first end of the second capacitor are connected in common, so The second terminal of the fifth resistor and the first terminal of the third capacitor are commonly connected to the second switching unit, and the second terminal of the second capacitor is commonly connected to the second terminal of the third capacitor. land. 7. The dual-antenna switching circuit according to claim 4, wherein the first switching unit comprises: a first signal conversion chip, a seventh resistor, and a first inductor; The control signal input terminal of the first signal conversion chip is connected to the first signal processing unit, the power supply terminal of the first signal conversion chip is connected to the second signal processing unit, and the power supply terminal of the first signal conversion chip is connected to the second signal processing unit. The ground end is grounded, the signal output end of the first signal conversion chip is connected to the first end of the seventh resistor, and the inverted signal output end of the first signal conversion chip is connected to the second switching unit, so The second end of the seventh resistor is connected to the first end of the first inductance, and the second end of the first inductance is connected to the first diode switch module; The second switching unit includes: a second signal conversion chip, an eighth resistor, a ninth resistor, and a second inductor; The control signal input terminal of the second signal conversion chip and the first terminal of the ninth resistor are commonly connected to the first switching unit, and the power supply terminal of the second signal conversion chip is connected to the first terminal of the ninth resistor. The two ends are commonly connected to the second signal processing unit, the output end of the second signal conversion chip is connected to the first end of the eighth resistor, the ground end of the second signal conversion chip is grounded, and the first end of the second signal conversion chip is connected to the ground. The output terminal of the anti-phase signal of the two-signal conversion chip is suspended in the air. 8. The dual-antenna switching circuit according to claim 1, wherein the first diode module comprises: a sixth capacitor, a seventh capacitor, a third inductor, a first diode, a second diode tube, the eighth capacitor and the fourth inductor; The first end of the sixth capacitor is connected to the first antenna, the second end of the sixth capacitor, the first end of the seventh capacitor, and the anode of the first diode are connected to the switch Module connection, the second end of the seventh capacitor is connected to the first end of the third inductance, the second end of the third inductance, the cathode of the first diode, the eighth capacitor The first end and the anode of the second diode are connected in common, the second end of the eighth capacitor is connected to the first end of the fourth inductor, and the cathode of the second diode is connected to the first end of the second diode. The second ends of the four inductors are commonly connected to the output module; The second diode module includes: a ninth capacitor, a tenth capacitor, a fifth inductor, a third diode, an eleventh capacitor, a fourth diode, and a sixth inductor; The first end of the ninth capacitor is connected to the second antenna, the second end of the ninth capacitor, the first end of the tenth capacitor, and the anode of the third diode are commonly connected to the In the switching module, the second end of the tenth capacitor is connected to the fifth inductance, the second end of the fifth inductance, the cathode of the third diode, and the first end of the eleventh capacitor end and the anode of the fourth diode are connected in common, the second end of the eleventh capacitor is connected to the first end of the sixth inductance, the cathode of the fourth diode is connected to the sixth The second end of the inductor is commonly connected to the output module. 9. The dual-antenna switching circuit according to claim 1, wherein the output module comprises: The twelfth capacitor, the seventh inductance, and the tenth resistor; The first end of the seventh inductor and the first end of the twelfth capacitor are commonly connected to the first diode switch module, and the second end of the seventh inductor is connected to the first end of the tenth resistor. connected at one end, the second end of the tenth resistor is grounded, and the second end of the twelfth capacitor is connected with the receiver. 10. A dual-antenna switching device, characterized in that the dual-antenna switching device comprises: control signal source; first antenna; second antenna; receiver; and The dual-antenna switching circuit according to any one of claims 1-9, wherein the dual-antenna switching circuit is connected to the control signal source, the first antenna, the second antenna and the receiver.