A method and system for testing system transceiver isolation protection time

Abstract

The present invention provides a method and system for testing the system transceiver isolation protection time, the method comprising: the transmission radiation signal of the transmitting device is directly in accordance with the pulse signal of the system; the transmitting antenna of the transmitting device is removed, and the transmission radiation signal is input to a high-power load through a coupler via a radio frequency cable; the transmission radiation signal is attenuated through the low-power coupling output end of the coupler, and then the transmission radiation signal is radiated to the receiving antenna of the transmitting device through the radio frequency cable and the directional radiation antenna; the distance R between the directional radiation antenna and the receiving antenna is set; and the system transceiver isolation protection time is adjusted until the signal detection indication pulse signal is not received during the low system timing. The present invention solves the limitation that the system transceiver isolation protection time indicator test work can only be carried out in a darkroom, so that this indicator can be tested in open areas such as an outdoor apron or runway, effectively improving the efficiency of system development and production.

Description

Technical Field

[0001] The present invention belongs to the field of electronic technology, and in particular to a method and system for testing system transceiver isolation protection time. Background Art

[0002] The conversion time indicator from transmission to reception in the receiving and transmitting aperture time-sharing working system is particularly important (that is, the system transmission and reception isolation protection time), which directly affects the conversion speed between the system transmission radiation and the system detection and reception.

[0003] Typical system transmit and receive isolation protection time test principle is as follows Figure 1 The specific steps are as follows:

[0004] (1) The signal source radiates the analog signal to the transmitting device through the signal simulation antenna;

[0005] (2) After receiving the analog signal through the receiving antenna, the transmitting device generates a transmitting signal and radiates it through the transmitting antenna;

[0006] (3) The spectrum analyzer receives the transmitted signal through the transmitting signal detection antenna to check whether the radiation status of the transmitting device is normal (such as power, transmitted signal frequency, etc.);

[0007] (4) Adjust the system's transmit-receive isolation protection time and check and confirm until the transmitting device cannot receive the signal from its own transmitting antenna (the minimum interval time is taken as the system's transmit-receive isolation protection time).

[0008] Due to the above process, the following factors need to be strictly controlled:

[0009] (1) In the test environment, in addition to the analog signal radiated by the signal source and the transmission signal radiated by the transmitter, no redundant RF signal can be received by the transmitter;

[0010] (2) The transmitting device can only detect the direct signal of the analog signal radiated by the signal source, and cannot detect the analog signal reflected by the transmitting device;

[0011] (3) It is also necessary to ensure that the transmission signal emitted by the transmitting device cannot be reflected and received by the transmitting device itself.

[0012] Due to the above factors, the testing environment is limited. Summary of the Invention

[0013] In response to the above-mentioned problems, the present invention aims to provide a system transceiver isolation protection time testing method and system, which can realize the transceiver isolation protection time test of the transmission system on the apron with a relatively low cost and economical method.

[0014] The present invention provides a method for testing a system receiving and transmitting isolation protection time, comprising the following steps:

[0015] S1, the transmission radiation signal of the transmitting device directly radiates a pulse signal with a specified frequency and a specified duty cycle according to the system settings;

[0016] S2, remove the transmitting antenna of the transmitting device, and input the transmitted radiation signal through the RF cable through the coupler to the high-power load;

[0017] S3, after attenuating the transmitted radiation signal through the low-power coupling output end of the coupler, radiates the transmitted radiation signal to the receiving antenna of the transmitting device through the radio frequency cable and the directional radiation antenna;

[0018] S4, set the distance R between the directional radiation antenna and the receiving antenna;

[0019] S5, adjusting the system transceiver isolation protection time until no signal detection indication pulse signal is received during the system timing is low.

[0020] Furthermore, in step S3, the transmitted radiation signal is attenuated according to the low-power coupled output index of the coupler.

[0021] Furthermore, it is assumed that after the transmitter is installed, the isolation between the receiving antenna and the transmitting antenna is L0, and the transmitting power of the transmitter is P T , the transmitting antenna gain is G T The total gain of the RF cable, the coupler low-power coupled output, and the directional radiation antenna is G x ; The distance R between the directional radiation antenna and the receiving antenna is calculated as follows:

[0022] R=Anti_log{(G x +L0-G T -32.4-20*log 10 F) / 20}

[0023] Where F is the frequency of the emitted radiation signal.

[0024] Furthermore, the isolation L0 between the receiving antenna and the transmitting antenna is determined by simulation calculation or actual installation measurement.

[0025] The present invention also provides a system transceiver isolation protection time test system, comprising a transmitting device, a coupler, a high-power load and a directional radiation antenna;

[0026] The transmitting antenna port of the transmitting device is not connected to the transmitting antenna, but is connected to a high-power load through a radio frequency cable and a coupler;

[0027] The low-power coupling output end of the coupler is connected to the directional radiation antenna through a radio frequency cable;

[0028] The directional radiation antenna is used to radiate the transmitted radiation signal to the receiving antenna of the transmitting device;

[0029] The distance between the directional radiation antenna and the receiving antenna is R;

[0030] The system transceiver isolation protection time test is completed by adjusting the system transceiver isolation protection time until no signal detection indication pulse signal is received during the system timing is low.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] The present invention overcomes the limitation that the system's transmit-receive isolation protection time indicator test can only be carried out in a darkroom, so that this indicator can be tested in open areas such as outdoor aprons or runways (without being affected by external electromagnetic signals), effectively improving the efficiency of system development and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a typical system transmit and receive isolation protection time test diagram.

[0034] Figure 2 This is a schematic diagram of the system receiving and sending isolation protection time test in an embodiment of the present invention.

[0035] Figure 3 This is a timing diagram of the system receiving and sending isolation protection time test in an embodiment of the present invention. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0038] Example

[0039] like Figure 2As shown, this embodiment proposes a method for testing the system transmission and reception isolation protection time, including the following steps:

[0040] S1, the emission radiation signal of the transmitting device does not depend on the external signal, and directly radiates the pulse signal with the specified frequency and duty cycle according to the system settings; the specific system cutting sequence is as follows Figure 3 As shown;

[0041] S2: Remove the transmitting antenna of the transmitting device and transmit the radiated signal through the coupler via an RF cable to a high-power load to prevent the transmitted signal from radiating into space and causing the reflected signal to be received by the transmitting device.

[0042] S3, after attenuating the transmitted radiation signal by about 40dB (the low-power coupled output indicator of the coupler) through the low-power coupled output end of the coupler, the transmitted radiation signal is radiated to the receiving antenna of the transmitting device through the RF cable and the directional radiation antenna;

[0043] S4, set the distance R between the directional radiation antenna and the receiving antenna;

[0044] Assume that after the transmitter is installed, the isolation between the receiving antenna and the transmitting antenna is L0 (which can be determined by simulation calculation or installation measurement), and the transmitting power of the transmitter is P T , the transmitting antenna gain is G T , Figure 2 The total gain of the RF cable, coupler low-power coupled output, and directional radiation antenna shown is G x , then the above parameters satisfy the following conditions:

[0045] P T +G T -L0=P T +G x -(32.4+20*log 10 F+20*log 10 R)

[0046] in:

[0047] F is the frequency of the emitted radiation signal, in MHz;

[0048] R is the distance between the directional radiation antenna and the receiving antenna, in km;

[0049] Therefore, R can be calculated according to this formula:

[0050] R=Anti_log{(G x +L0-G T -32.4-20*log 10 F) / 20}

[0051] S5, adjust the system transceiver isolation protection time until the system timing is low and no signal detection indication pulse signal is received, such as Figure 3 shown.

[0052] Example 2

[0053] like Figure 2 As shown, this embodiment proposes a system transmission and reception isolation protection time test system, including a transmitting device, a coupler, a high-power load and a directional radiation antenna;

[0054] The transmitting antenna port of the transmitting device is not connected to the transmitting antenna, but is connected to a high-power load through a radio frequency cable and a coupler;

[0055] The low-power coupling output end of the coupler is connected to the directional radiation antenna through a radio frequency cable;

[0056] The directional radiation antenna is used to radiate the transmitted radiation signal to the receiving antenna of the transmitting device;

[0057] The distance between the directional radiation antenna and the receiving antenna is R;

[0058] The system transceiver isolation protection time test is completed by adjusting the system transceiver isolation protection time until no signal detection indication pulse signal is received during the system timing is low.

[0059] The specific process can be referred to Example 1 and will not be described in detail here.

[0060] An application example: The method of the present invention is used to test the system receiving and transmitting isolation index of a certain type of airborne equipment after installation. The test, which could only be carried out in a darkroom, can now be carried out on an open apron, and the measured protection time index can match the application on the aircraft.

[0061] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A system transceiver isolation protection time testing method, characterized in that: The steps include: S1, the transmission radiation signal of the transmitting device directly radiates a pulse signal with a specified frequency and a specified duty cycle according to the system settings; S2, remove the transmitting antenna of the transmitting device, and input the transmitted radiation signal through the RF cable through the coupler to the high-power load; S3, after attenuating the transmitted radiation signal through the low-power coupling output end of the coupler, radiates the transmitted radiation signal to the receiving antenna of the transmitting device through the radio frequency cable and the directional radiation antenna; S4, set the distance R between the directional radiation antenna and the receiving antenna; S5, adjusting the system transceiver isolation protection time until no signal detection indication pulse signal is received during the system timing is low.

2. The system transceiver isolation protection time testing method according to claim 1, characterized in that: In step S3, the transmitted radiation signal is attenuated according to the low-power coupled output index of the coupler.

3. The system receiving and transmitting isolation protection time testing method according to claim 1, characterized in that: Assume that after the transmitter is installed, the isolation between the receiving antenna and the transmitting antenna is L0, and the transmitting power of the transmitter is P T , the transmitting antenna gain is G T The total gain of the RF cable, the coupler low-power coupled output, and the directional radiation antenna is G x ; The distance R between the directional radiation antenna and the receiving antenna is calculated as follows: R=Anti_log{(G x +L0-G T -32.4-20*log 10 F) / 20} Where F is the frequency of the emitted radiation signal.

4. The system transceiver isolation protection time testing method according to claim 3, characterized in that: The isolation between the receiving antenna and the transmitting antenna is L0, which is determined by simulation calculation or actual installation measurement.

5. A system transceiver isolation protection time test system, characterized in that: Including transmitting equipment, coupler, high power load and directional radiating antenna; The transmitting antenna port of the transmitting device is not connected to the transmitting antenna, but is connected to a high-power load through a radio frequency cable and a coupler; The low-power coupling output end of the coupler is connected to the directional radiation antenna through a radio frequency cable; The directional radiation antenna is used to radiate the transmitted radiation signal to the receiving antenna of the transmitting device; The distance between the directional radiation antenna and the receiving antenna is R; The system transceiver isolation protection time test is completed by adjusting the system transceiver isolation protection time until no signal detection indication pulse signal is received during the system timing is low.

6. The system transceiver isolation protection time test system according to claim 5, characterized in that: Assume that after the transmitter is installed, the isolation between the receiving antenna and the transmitting antenna is L0, and the transmitting power of the transmitter is P T , the transmitting antenna gain is G T The total gain of the RF cable, the coupler low-power coupled output, and the directional radiation antenna is G x ; The distance R between the directional radiation antenna and the receiving antenna is calculated as follows: R=Anti_log{(G x +L0-G T -32.4-20*log 10 F) / 20} Where F is the frequency of the emitted radiation signal.

7. The system transceiver isolation protection time test system according to claim 6, characterized in that: The isolation between the receiving antenna and the transmitting antenna is L0, which is determined by simulation calculation or actual installation measurement.

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