Cascaded high-power radio frequency transceiving automatic switching device

Abstract

The utility model relates to a cascaded high-power radio frequency transceiving automatic switching device, which comprises a driving device, a first-stage coaxial switch, a second-stage coaxial switch, a power supply device, a radio station PTT signal and a receiver. According to the cascaded high-power radio frequency transceiving automatic switching device, the device is connected in a cascaded manner and is used for improving the signal isolation between a receiver and a transmitter, so that the strength of a signal serially connected to the receiver can be reduced to a safe range when the transmitter works, and when the transmitter works, one path of signal is output to a driving device, so that the signal transmission efficiency is improved. The driving device uses the signal as a control signal to drive the cascade device, and the cascade device works to increase the signal isolation between the receiver and the transmitter, so that the receiver is protected.

Description

TECHNICAL FIELD

[0001] The utility model relates to high -power radio communication technical field, concretely is a kind of cascaded high -power radio frequency transceiver automatic switching device. BACKGROUND

[0002] Transmitter and receiver share an antenna, and need to use radio frequency transceiver automatic switching device (another name can also be transceiver switch). To avoid transmitter signal into receiver, signal isolation is an important indicator of automatic switching device. The signal isolation of existing automatic switching device can generally reach 60dB, suitable for use in small and medium power radio. But when transmitter works with several kilowatt power, its signal into receiver is about 0~3dBm, and the intensity has exceeded ordinary receiver blocking value, which may cause radio damage.

[0003] Therefore, to prevent the influence of transmitter signal on receiver, the existing use mode is to use receiver and transmitter separately in high-power radio, and to erect two antennas with relatively far distance, which are used for receiver and transmitter respectively. This use mode has two disadvantages, one is the problem of antenna erection distance, too far distance increases signal line loss, too close distance affects the transmission and reception antennas; the other is that it brings great difficulty to the mobile use of high-power radio, and two antennas need to be erected every time the equipment is deployed, which seriously reduces the efficiency of the operation, and significantly increases the labor intensity of personnel. Based on this, a cascaded high-power radio frequency transceiver automatic switching device is proposed. UTILITY MODEL CONTENT

[0004] (I) Technical problem solved

[0005] To solve the above technical problems, the utility model provides a cascaded high-power radio frequency transceiver automatic switching device.

[0006] (II) Technical scheme

[0007] Based on this, the utility model provides the following technical scheme: a cascaded high-power radio frequency transceiver automatic switching device, including driving equipment, 1st coaxial switch, 2nd coaxial switch, power supply equipment, radio PTT signal, receiver;

[0008] The driving equipment is connected with the radio PTT signal to establish data connection, and the driving equipment is connected with the power supply equipment, and the driving equipment is connected with the 1st coaxial switch and the 2nd coaxial switch respectively, and the 2nd coaxial switch is connected with the receiver.

[0009] Preferably, the 1st coaxial switch and the 2nd coaxial switch constitute cascaded equipment, and the 1st coaxial switch is connected with the 2nd coaxial switch.

[0010] Preferably, the 2nd coaxial switch is used to receive emitter radio frequency signal.

[0011] Preferably, the first coaxial switch and the second coaxial switch are both provided with a first port and a second port.

[0012] Preferably, the second port of the first coaxial switch is connected with the first port of the second coaxial switch.

[0013] Preferably, one end of the first port of the first coaxial switch is connected with an antenna, and the other end of the first port of the first coaxial switch is connected with a transmitting RF signal.

[0014] Preferably, one end of the second port of the second coaxial switch is connected with a receiver, and the other end of the second port of the second coaxial switch is connected with a load.

[0015] (Three) beneficial effects

[0016] Compared with the prior art, the utility model provides a kind of cascaded high-power radio frequency transceiver automatic switching device, with following beneficial effects:

[0017] The cascaded high-power radio frequency transceiver automatic switching device is connected in the form of cascade, for improving the signal isolation degree between receiver and transmitter, can make the signal strength of transmitter work string into receiver reduce to safe range, transmitter works, and output 1 way signal to driving equipment, and driving equipment drives cascade equipment with this signal as control signal, and cascade equipment works to increase the signal isolation degree between receiver and transmitter, so that receiver is protected. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is whole structure schematic diagram of the utility model;

[0019] Fig. 2 It is PTT closed state working principle schematic diagram of the utility model. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Please refer to Figs. 1-2The utility model provides a kind of cascaded high-power radio frequency transceiver automatic switching device, including driving equipment, 1 level coaxial switch, 2 level coaxial switch, power supply equipment, radio PTT signal, receiver;The driving equipment establishes data connection with radio PTT signal, the driving equipment is electrically connected with power supply equipment, the driving equipment is connected with 1 level coaxial switch, 2 level coaxial switch respectively, 2 level coaxial switch is connected with receiver.

[0022] In some embodiments, the 1 level coaxial switch, 2 level coaxial switch constitute cascade equipment with each other, the 1 level coaxial switch is connected with 2 level coaxial switch, the 2 level coaxial switch is used to receive emitter radio frequency signal, a No. and No. two ports are arranged on the 1 level coaxial switch and 2 level coaxial switch, the No. two port of 1 level coaxial switch is connected with the No. one port of 2 level coaxial switch, the No. one port of 1 level coaxial switch is connected with antenna, the No. one port of 1 level coaxial switch is connected with emitter radio frequency signal, the No. two port of 2 level coaxial switch is connected with receiver, and the No. two port of 2 level coaxial switch is connected with load.

[0023] As Fig. 2 As shown in the utility model design device, press down radio PTT transmitter enters working condition, driving equipment obtains 1 way low level input at this time, and +24V direct current is output at its output end port closure. 1 level coaxial switch is closed at this +24V voltage, and transmitter output radio frequency signal, 1 level coaxial switch No. one port and antenna end carry out signal transmission. Meanwhile, this radio frequency signal enters 2 level coaxial switch after attenuating 60dB (isolation). 2 level coaxial switch is closed No. two port with 1 level coaxial switch simultaneously under +24V voltage, and the signal that enters 1 level coaxial switch is again attenuated 60dB (isolation) after entering receiver. With 2000W as example that transmitter works, the signal size that finally enters receiver is-57dBm, far below the blocking value 0dBm of ordinary receiver specification.

[0024] When radio PTT transmitter stops working and is loosened, driving equipment stops outputting +24V direct current. 1 level coaxial switch closes No. two port, and 2 level coaxial switch closes No. one port, and the communication signal that enters from antenna directly enters receiver, and radio resumes listening state.

[0025] The cascaded device designed according to the utility model can be used as a transceiver shared device for automatic switching in high-power radio.

[0026] The example is used for explaining the working mode and principle of the utility model, and only a two-stage cascaded high-power radio frequency transceiving automatic switching device is taken as an example for illustration. Further, in order to meet the application requirements under different conditions, the cascaded device can be three stages or more. If it is more than three stages, in addition to the first stage coaxial switch which must be a three-terminal radio frequency device, the remaining coaxial switches can be two-port radio frequency devices. If the remaining coaxial switches select three-terminal radio frequency devices, a load needs to be connected to the idle port of each stage (as shown in the dashed line part of the figure). Fig. 2 The isolation degree indexes of various coaxial switches are different, and reasonable selection and combination can be made according to actual application requirements.

[0027] Of course, the utility model can also be realized by using other structures, such as the single-pole multi-throw coaxial switch produced by Radiall, which can be used in the utility model, and the driving device can also be designed by using a circuit with diode and triode as the core. The signal input of the driving device can also be a radio frequency coupling signal

[0028] In some embodiments, the signal output to the driving device when the transmitter works in the utility model is a radio PTT signal. The driving device is a circuit with a relay as the core, the cascaded device is a plurality of controlled high-power coaxial switches, and the power supply generally uses +24V direct current (not limited to). In addition to the above components, the signal output to the driving device of the transmitter of the utility model can be a radio frequency coupling signal and any other signal that can quickly detect the state of the transmitter. It can also optionally contain a circuit combination that realizes the same function. According to the cascaded high-power radio frequency transceiving automatic switching device designed in the utility model, the signal difference between the receiver and the transmitter can be increased by more than 60dB, which is equivalent to a total isolation of at least 120dB.

[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A cascaded high-power radio frequency transceiver automatic switching device, characterized in that: The driving device, the first-stage coaxial switch, the second-stage coaxial switch, the power supply device, the radio PTT signal and the receiver are connected in series. The driving device is connected with the radio PTT signal through a data connection, and is connected with the power supply device through an electric connection.

2. The automatic switching device of claim 1, wherein: The first-stage coaxial switch and the second-stage coaxial switch are connected in series.

3. The automatic switching device according to claim 1, wherein: The second-stage coaxial switch is used for receiving the emitter radio frequency signal.

4. The automatic switching device according to claim 1, wherein: The first-stage coaxial switch and the second-stage coaxial switch are both provided with a first port and a second port.

5. The automatic switching device according to claim 1, wherein: The second port of the first-stage coaxial switch is connected with the first port of the second-stage coaxial switch.

6. The automatic switching device according to claim 1, wherein: One end of the first port of the first-stage coaxial switch is connected with the antenna, and the other end of the first port of the first-stage coaxial switch is connected with the emitter radio frequency signal.

7. The automatic switching device according to claim 1, wherein: One end of the second port of the second-stage coaxial switch is connected with the receiver, and the other end of the second port of the second-stage coaxial switch is connected with a load.

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