Ground radio station V / U channel detection auxiliary equipment

Abstract

The utility model provides ground radio station V / U channel detection auxiliary equipment, which comprises a radio frequency relay, a directional coupler circuit, a radio frequency electronic switch circuit, a power detection circuit and an interface control circuit, and is characterized in that a radio station is connected with an antenna through the radio frequency relay and the directional coupler circuit; the interface control circuit is in control connection with the radio frequency relay and the radio frequency electronic switch circuit; the radio frequency electronic switch circuit is in control connection with a normally open contact of the radio frequency relay; the directional coupler circuit is connected with the interface control circuit through the power detection circuit, the radio frequency electronic switch circuit receives a forward coupling signal of the directional coupler circuit and transmits and receives a test signal, and the interface control circuit is connected with external equipment. The device is used for detecting the standing-wave ratio and the output power of a ground radio station, and has a radio station output radio frequency signal coupling function. As the equipment is connected in series between the radio station and the antenna, the input / output of the radio station and the antenna feeder system in the original networking system is not influenced when the equipment breaks down.

Description

Technical Field

[0001] The utility model relates to the field of communications, and in particular to an auxiliary device for detecting V / U channels of a ground radio station. Background Art

[0002] During the actual use of ground radio stations, the early deployed radio stations will inevitably experience performance degradation, increased failure rates, etc. At the same time, affected by the complex working environment, the stability and reliability of some radio stations may be reduced to a level that cannot meet the requirements of daily combat missions. All these situations require professional technicians to maintain and repair the equipment. The V / U channel represents the frequency band range of the ground radio station. The U-band frequency range is usually 225 - 399.975 MHz; the V-band frequency range is usually 108 - 173.975 MHz.

[0003] Currently, ground radio stations mainly rely on local maintenance and regular inspection means to ensure the working state of the equipment. The existing guarantee methods have disadvantages such as difficult determination of maintenance requirements, inconvenient communication between maintenance personnel and users, low maintenance efficiency, and high maintenance costs. Summary of the Invention

[0004] In order to solve the problems existing in the background art, the utility model provides an auxiliary device for detecting V / U channels of a ground radio station.

[0005] An auxiliary device for detecting V / U channels of a ground radio station includes a radio station and an antenna, and further includes a radio frequency relay, a directional coupler circuit, a radio frequency electronic switch circuit, a power detection circuit, and an interface control circuit. The radio station is connected to the antenna through the radio frequency relay and the directional coupler circuit. The interface control circuit is connected to control the radio frequency relay and the radio frequency electronic switch circuit. The radio frequency electronic switch circuit is connected to control the normally open contact of the radio frequency relay; the directional coupler circuit is connected to the interface control circuit through the power detection circuit. The radio frequency electronic switch circuit receives the forward coupling signal of the directional coupler circuit and transmits and receives test signals. The interface control circuit is connected to external devices.

[0006] Based on the above, in the directional coupler circuit, one end of the primary coil of the mutual inductor T0 is connected to the normally closed contact of the radio frequency relay through the capacitor C1, and the other end of the primary coil of the mutual inductor T0 is connected to the power detection circuit through the inductor L2; one end of the secondary coil of the mutual inductor T0 is connected to the radio frequency electronic switch and is grounded respectively through the capacitor C2 and the inductor L1, and the other end of the secondary coil of the mutual inductor T0 is grounded respectively through the resistor R1 and the resistor R2.

[0007] Based on the above, in the RF electronic switch circuit, pin 1 of RF switch N1 is sequentially connected to the directional coupler circuit through capacitor C20, resistor R14, capacitor C21, inductor L10, and inductor L9. Resistor R17 and capacitor C22 are connected in parallel across both ends of inductor L9, resistor R18 and capacitor C23 are connected in parallel across both ends of inductor L10, and both ends of resistor R14 are grounded through resistor R15 and resistor R16 respectively; pin 3 of RF switch N1 is connected to the normally open contact of the RF relay through capacitor C18, resistor R11, and capacitor C17, and both ends of resistor R11 are grounded through resistor R12 and resistor R13 respectively; pins 4 and 6 of RF switch N1 are respectively connected to the interface control circuit; pin 5 of RF switch N1 receives and transmits test signals through capacitor C19.

[0008] Based on the above, in the power detection circuit, one end of the primary coil of directional coupler T1 is connected to the directional coupler circuit and grounded through capacitor C3, the other end of the primary coil of directional coupler T1 is connected to the antenna through a high-pass filter circuit, one end of the secondary coil of directional coupler T1 is grounded through capacitor C5, the other end of the secondary coil of directional coupler T1 is connected to the anode of detection diode VD1, the cathode of detection diode VD1 outputs voltage V+ to an external device through resistor R7, the anode of detection diode VD1 is grounded through resistor R3 and resistor R4 respectively, both ends of resistor R7 are grounded through capacitor C7, resistor R8, and capacitor C8 respectively, and the anode of detection diode VD1 is also connected to one end of inductor L5 through inductor L3; the other end of the primary coil of directional coupler T1 is also grounded through the primary coil of directional coupler T2, one end of the secondary coil of directional coupler T2 is connected to the anode of detection diode VD1, the other end of the secondary coil of directional coupler T2 is connected to the anode of detection diode VD2 through capacitor C6, the cathode of detection diode VD2 outputs voltage V- to an external device through resistor R9, the anode of detection diode VD2 is grounded through resistor R5 and resistor R6 respectively, both ends of resistor R10 are grounded through capacitor C9, resistor R9, and capacitor C10 respectively, and the anode of detection diode VD2 is also connected to one end of inductor L3; the other end of inductor L3 is connected to the interface control circuit through inductor L4.

[0009] Based on the above, in the high-pass filter circuit, one end of capacitor C20 is connected to the other end of the primary coil of directional coupler T1 and grounded through inductor L6, the other end of capacitor C20 is connected to the antenna through capacitor C15, both ends of capacitor C15 are grounded through inductor L7 and inductor L8 respectively, capacitor C14 is connected in parallel across both ends of capacitor C20, and capacitor C16 is connected in parallel across both ends of capacitor C15.

[0010] Based on the above, in the interface control circuit, the input end of the power conversion chip U1 is connected to the power supply through the resistor R21 and the push-button switch S1. The input end of the power conversion chip U1 is also connected to the positive input end of the RF relay. The output end of the power conversion chip U1 is connected to the VCC end of the inverter N2 through the inductor L11. The output end of the power conversion chip U1 is also connected to the +5V power supply. The output end of the power conversion chip U1 is also connected to one end of the resistor R20. The other end of the resistor R20 is grounded through the capacitor C34, and the other end of the resistor R20 is connected to the inductor L4 of the power detection circuit. The Y end of the inverter N2 is connected to the 6th pin of the RF switch N1 in the RF electronic switch circuit. The A end of the inverter N2 is connected to the 4th pin of the RF switch N1 in the RF electronic switch circuit and the A end of the RF relay.

[0011] The present utility model has substantial features and progress compared with the prior art. Specifically, the function of the present utility model is to detect the standing wave ratio and output power of the ground station, and at the same time has the function of coupling the RF signal output by the station. Since the device is connected in series between the station and the antenna, it is ensured that when the device fails, it does not affect the input / output of the station and the antenna feed system in the original networking system. Brief Description of the Drawings

[0012] Figure 1 is the structural schematic block diagram of the present utility model.

[0013] Figure 2 is the circuit principle schematic diagram of the RF relay, directional coupler circuit and RF electronic switch circuit of the present utility model.

[0014] Figure 3 is the circuit principle schematic diagram of the power detection circuit and high-pass filter circuit of the present utility model.

[0015] Figure 4 is the circuit principle schematic diagram of the interface control circuit of the present utility model. Detailed Embodiment

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Such as Figures 1 - 4As shown in the figure, a ground station V / U channel detection auxiliary device includes a radio station and an antenna, and also includes a radio frequency relay, a directional coupler circuit, a radio frequency electronic switch circuit, a power detection circuit, and an interface control circuit. The radio station is connected to the antenna through the radio frequency relay and the directional coupler circuit. The interface control circuit is controllably connected to the radio frequency relay and the radio frequency electronic switch circuit. The radio frequency electronic switch circuit is controllably connected to the normally open contact of the radio frequency relay. The directional coupler circuit is connected to the interface control circuit through the power detection circuit. The radio frequency electronic switch circuit receives the forward coupling signal of the directional coupler circuit and transmits and receives test signals. The interface control circuit is connected to external devices.

[0018] During the reception performance detection of the ground station, the pin A of the radio frequency relay is connected to an external device through the WB terminal and is controlled. The normally open contact of the radio frequency relay is driven to close (the COM pin is connected to the NO pin), and the normally closed contact is opened (the COM pin is disconnected from the NC pin), switching the radio frequency electronic switch to establish an input channel for the radio frequency signal used in the reception test of the ground station. During the transmission performance detection of the ground station, the normally closed contact of the radio frequency relay is driven to close (the COM pin is connected to the NC pin), and the normally open contact is opened (the COM pin is disconnected from the NO pin), providing a radio frequency path from the radio station to the antenna for the transmitted signal; switching the radio frequency electronic switch to output the radio frequency coupling signal used in the transmission detection of the radio station; the directional coupler circuit and the power detection circuit couple and detect the power transmitted by the radio station; the interface control circuit analyzes the detected voltage and calculates and outputs the power and standing wave ratio results of the radio station transmission. Since this device uses a directional coupler connected in series between the radio station and the antenna, it ensures that when the device fails, it does not affect the input / output between the ground station and the antenna in the original networking system. The radio frequency relay has its normally closed contact connected to the radio frequency main path. The maximum power that the radio frequency relay and the directional coupler can withstand is 300W, which is much greater than the actual transmission power of the radio station (less than 100W). Therefore, even if the radio frequency relay is not powered on (the directional coupler is a passive component) or fails, the radio frequency main path can be reliably guaranteed to be normal.

[0019] Specifically, such as Figure 2As shown, the model of the RF relay K1 is JPT40-SF28-011, and the model of the RF switch N1 is MASWSS0181. The terminal XS3 is used to connect to external devices and transmit and receive test signals. In the directional coupler circuit, one end of the primary coil of the mutual inductor T0 is connected to the normally closed contact of the RF relay K1 through the capacitor C1, and the other end of the primary coil of the mutual inductor T0 is connected to the power detection circuit through the inductor L2; one end of the secondary coil of the mutual inductor T0 is connected to the RF electronic switch and grounded through the capacitor C2 and the inductor L1 respectively, and the other end of the secondary coil of the mutual inductor T0 is grounded through the resistor R1 and the resistor R2 respectively. In the RF electronic switch circuit, pin 1 of the RF switch N1 is sequentially connected to one end of the secondary coil of the mutual inductor T0 in the directional coupler circuit through the capacitor C20, the resistor R14, the capacitor C21, the inductor L10, and the inductor L9. Resistors R17 and C22 are connected in parallel across both ends of the inductor L9, and resistors R18 and C23 are connected in parallel across both ends of the inductor L10. Both ends of the resistor R14 are grounded through the resistors R15 and R16 respectively; pin 3 of the RF switch N1 is connected to the normally open contact NO of the RF relay K1 through the capacitor C18, the resistor R11, and the capacitor C17 once. Both ends of the resistor R11 are grounded through the resistors R12 and R13 respectively; pin 4 of the RF switch N1 is connected to pin 2 of the inverter N2 in the interface control circuit, and pin 6 of the RF switch N1 is connected to pin 4 of the inverter N2 in the interface control circuit; pin 5 of the RF switch N1 transmits and receives test signals through the capacitor C19.

[0020] During the performance detection of the ground station transmitter:

[0021] a) The control signal WB from an external device controls pin A of the RF relay K1; making its COM pin connected to the NC pin of the normally closed contact and the COM pin disconnected from the NO pin of the normally open contact. The radio station transmits the RF signal through the RF relay K1, the mutual inductor T0, and the inductor L2 in sequence and transmits it to the antenna.

[0022] b) The control signals SPKG1 and SPKG2 from the interface control circuit are passed to pins V2 and V1 of the RF switch N1 through pins A and Y of the inverter N2; making its RFC pin connected to the RF1 pin and the RFC pin disconnected from the RF2 pin. The mutual inductor TO couples out the RF coupling signal from the RF signal transmitted by the radio station through the secondary coil. The RF coupling signal passes through R17, R18, C21, R14, C20, pin RF1 of N1, RFC, C19, and XS3 in sequence and is transmitted to the external RF detection device.

[0023] During the performance detection of the ground station receiver:

[0024] The control signal WB from the external device controls pin A of the RF relay K1, causing its COM pin to disconnect from the normally closed contact NC pin and connect to the normally open contact NO pin. The RF signal used for antenna reception test passes through pin NO and COM of K1 in sequence and is transmitted to the radio station.

[0025] b) The control signals SPKG1 and SPKG2 from the interface control circuit are passed through pins A and Y of the inverter N2 to pins V2 and V1 of the RF switch N1, causing its RFC pin to connect to the RF2 pin and disconnect from the RF1 pin. The RF signal used for radio station reception test passes through terminal XS3, C19, pins RFC and RF2 of N1, C18, R11, and C17 in sequence and is transmitted to pin NO of K1.

[0026] Such as Figure 3As shown in the figure, in the power detection circuit, one end of the primary coil of the directional coupler T1 is connected to the directional coupler circuit and grounded through the capacitor C3. The other end of the primary coil of the directional coupler T1 is connected to the antenna through a high-pass filter circuit. One end of the secondary coil of the directional coupler T1 is grounded through the capacitor C5. The other end of the secondary coil of the directional coupler T1 is connected to the anode of the detection diode VD1. The cathode of the detection diode VD1 outputs the voltage V+ to an external device through the resistor R7. The anode of the detection diode VD1 is grounded through the resistors R3 and R4 respectively. Both ends of the resistor R7 are grounded through the capacitor C7, the resistor R8, and the capacitor C8 respectively. The anode of the detection diode VD1 is also connected to one end of the inductor L5 through the inductor L3; the other end of the primary coil of the directional coupler T1 is also grounded through the primary coil of the directional coupler T2. One end of the secondary coil of the directional coupler T2 is connected to the anode of the detection diode VD1. The other end of the secondary coil of the directional coupler T2 is connected to the anode of the detection diode VD2 through the capacitor C6. The cathode of the detection diode VD2 outputs the voltage V- to an external device through the resistor R9. The anode of the detection diode VD2 is grounded through the resistors R5 and R6 respectively. Both ends of the resistor R10 are grounded through the capacitor C9, the resistor R9, and the capacitor C10 respectively. The anode of the detection diode VD2 is also connected to one end of the inductor L3; the other end of the inductor L3 is connected to the interface control circuit through the inductor L4. In the power detection circuit, the directional couplers T1 and T2 adopt a diode peak envelope detection circuit. The two coupling ports are used for sampling the forward and reverse signals. After the sampled signals are rectified and detected, they can be used as the reference levels of the forward and reverse powers. This reference level is sampled and calculated by the interface control circuit to obtain the voltage standing wave ratio and the power. When the forward power of the device is 60W, the coupled output is 0dBm ± 1dB, that is, the coupling degree is about 48dB. When the power capacity is 300W (54dBm), the maximum test coupling signal is 6dBm. Therefore, the maximum signal passing through the radio frequency electronic switch is 6dBm, and an integrated switch is selected to achieve it, and its power capacity is 33dBm. The voltages V+ and V- output by the power detection circuit are respectively output to an external device, and the external device calculates the power and the standing wave ratio of the radio frequency signal transmitted by the radio station through this reference level.

[0027] In the high-pass filter circuit, one end of the capacitor C20 is connected to the other end of the primary coil of the directional coupler T1 and grounded through the inductor L6. The other end of the capacitor C20 is connected to the antenna through the capacitor C15. Both ends of the capacitor C15 are grounded through the inductors L7 and L8 respectively. A capacitor C14 is connected in parallel at both ends of the capacitor C20, and a capacitor C16 is connected in parallel at both ends of the capacitor C15. The signal is transmitted through the antenna after filtering.

[0028] As Figure 4As shown, in the interface control circuit, the input end of the power conversion chip U1 is connected to the power supply through the resistor R21 and the push-button switch S1, and is used to convert and provide the required voltage. The input end of the power conversion chip U1 is also connected to the positive input end of the RF relay K1 to provide voltage. The output end of the power conversion chip U1 is connected to the VCC end of the inverter N2 through the inductor L11. The output end of the power conversion chip U1 is also connected to the +5V power supply. The output end of the power conversion chip U1 is also connected to one end of the resistor R20. The other end of the resistor R20 is grounded through the capacitor C34, and the other end of the resistor R20 is connected to the inductor L4 of the power detection circuit. The Y end of the inverter N2 is connected to the 6th pin of the RF switch N1 in the RF electronic switch circuit. The A end of the inverter N2 is connected to the 4th pin of the RF switch N1 in the RF electronic switch circuit and the A end of the RF relay K1. The model of the inverter N2 is SN74AHCT1G04DBV. The power supply supplies +12V to the RF relay K1 and the power conversion chip U1 through S1 and R21. The power conversion chip U1 converts the +12V voltage into +5V and supplies it to the inverter N2 and the inductor L4 of the power detection circuit.

[0029] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A ground radio station V / U channel detection auxiliary device, comprising a radio station and an antenna, characterized in that: It also includes a radio frequency relay, a directional coupler circuit, a radio frequency electronic switch circuit, a power detection circuit and an interface control circuit. The radio station is connected to the antenna through the radio frequency relay and the directional coupler circuit. The interface control circuit controls the connection between the radio frequency relay and the radio frequency electronic switch circuit. The radio frequency electronic switch circuit controls the normally open contact connected to the radio frequency relay. The directional coupler circuit is connected to the interface control circuit through the power detection circuit, the radio frequency electronic switch circuit receives the forward coupling signal of the directional coupler circuit and sends and receives the test signal, and the interface control circuit is connected to the external device.

2. The ground station V / U channel detection auxiliary device according to claim 1, characterized in that: In the directional coupler circuit, one end of the primary coil of the mutual inductor T0 is connected to the normally closed contact of the radio frequency relay through the capacitor C1, and the other end of the primary coil of the mutual inductor T0 is connected to the power detection circuit through the inductor L2; one end of the secondary coil of the mutual inductor T0 is connected to the radio frequency electronic switch and grounded through the capacitor C2 and the inductor L1 respectively, and the other end of the secondary coil of the mutual inductor T0 is grounded through the resistor R1 and the resistor R2 respectively.

3. The ground station V / U channel detection auxiliary device according to claim 1, characterized in that: In the RF electronic switch circuit, pin 1 of the RF switch N1 is connected to the directional coupler circuit through capacitor C20, resistor R14, capacitor C21, inductor L10 and inductor L9 in sequence, resistor R17 and capacitor C22 are connected in parallel at both ends of the inductor L9, resistor R18 and capacitor C23 are connected in parallel at both ends of the inductor L10, and both ends of the resistor R14 are grounded through resistor R15 and resistor R16 respectively; pin 3 of the RF switch N1 is connected to the normally open contact of the RF relay through capacitor C18, resistor R11 and capacitor C17 at one time, and both ends of the resistor R11 are grounded through resistor R12 and resistor R13 respectively; pins 4 and 6 of the RF switch N1 are connected to the interface control circuit respectively; pin 5 of the RF switch N1 receives and sends test signals through capacitor C19.

4. The ground station V / U channel detection auxiliary device according to claim 1, characterized in that: In the power detection circuit, one end of the primary coil of the directional coupler T1 is connected to the directional coupler circuit and grounded through the capacitor C3, the other end of the primary coil of the directional coupler T1 is connected to the antenna through the high-pass filter circuit, one end of the secondary coil of the directional coupler T1 is grounded through the capacitor C5, the other end of the secondary coil of the directional coupler T1 is connected to the anode of the detection diode VD1, the cathode of the detection diode VD1 outputs the voltage V+ to the external device through the resistor R7, the anode of the detection diode VD1 is grounded through the resistor R3 and the resistor R4 respectively, the two ends of the resistor R7 are grounded through the capacitor C7, the resistor R8 and the capacitor C8 respectively, and the anode of the detection diode VD1 is also connected to the inductor L3 through the inductor L5. one end of the primary coil of the directional coupler T1; the other end of the primary coil of the directional coupler T2 is also grounded through the primary coil of the directional coupler T2, one end of the secondary coil of the directional coupler T2 is connected to the anode of the detection diode VD1, the other end of the secondary coil of the directional coupler T2 is connected to the anode of the detection diode VD2 through the capacitor C6, the cathode of the detection diode VD2 outputs a voltage V- to the external device through the resistor R9, the anode of the detection diode VD2 is grounded through the resistor R5 and the resistor R6 respectively, the two ends of the resistor R10 are grounded through the capacitor C9, the resistor R9 and the capacitor C10 respectively, the anode of the detection diode VD2 is also connected to one end of the inductor L3; the other end of the inductor L3 is connected to the interface control circuit through the inductor L4.

5. The ground station V / U channel detection auxiliary device according to claim 4, characterized in that: In the high-pass filter circuit, one end of capacitor C20 is connected to the other end of the primary coil of directional coupler T1 and grounded through inductor L6, the other end of capacitor C20 is connected to the antenna through capacitor C15, both ends of capacitor C15 are grounded through inductor L7 and inductor L8 respectively, both ends of capacitor C20 are connected in parallel with capacitor C14, and both ends of capacitor C15 are connected in parallel with capacitor C16.

6. The ground station V / U channel detection auxiliary device according to claim 1, characterized in that: In the interface control circuit, the input end of the power conversion chip U1 is connected to the power supply through the resistor R21 and the button switch S1, the input end of the power conversion chip U1 is also connected to the positive input end of the radio frequency relay, the output end of the power conversion chip U1 is connected to the VCC end of the inverter N2 through the inductor L11, the output end of the power conversion chip U1 is also connected to the +5V power supply, the output end of the power conversion chip U1 is also connected to one end of the resistor R20, the other end of the resistor R20 is grounded through the capacitor C34, and the other end of the resistor R20 is connected to the inductor L4 of the power detection circuit; the Y end of the inverter N2 is connected to the 6th pin of the radio frequency switch N1 of the radio frequency electronic switching circuit, and the A end of the inverter N2 is connected to the 4th pin of the radio frequency switch N1 of the radio frequency electronic switching circuit and the A end of the radio frequency relay.

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