Detection device and method for radio frequency front-end transceiver closed-loop system

Abstract

The present application discloses a detection device for a radio frequency front-end transceiver closed-loop system, comprising: a first switch, a first single-end of which is electrically connected to a coupling module, a first double-throw end of which corresponds to a first load end of a first load, and the other end corresponds to a signal input end of a low-noise amplifier module; a second switch, a second single-end of which is electrically connected to a limiting module, a second double-throw end of which corresponds to a second load end of a second load, and the other end corresponds to a signal input end of the low-noise amplifier module; when the system is in a self-detection mode, the first double-throw end is thrown at the signal input end, the second double-throw end is thrown at the second load end, and the signal processing link amplifies the received first radio frequency signal to obtain an amplified radio frequency signal; the amplified radio frequency signal is coupled by the coupling module to obtain a coupled radio frequency signal and a main radio frequency signal, the coupled radio frequency signal enters the low-noise amplifier module via the first switch, and the main radio frequency signal is emitted via a unidirectional transmission module and an antenna; the self-detection efficiency is improved, and the system integrity is effectively verified.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field related to the design of radio frequency front-end circuits in data link-based wireless communication links, and specifically relates to a detection device and method for a radio frequency front-end transceiver closed-loop system. Background Art

[0002] In the data link wireless communication link, the RF front-end module, as an indispensable component, plays a vital role. The RF front-end module has a transceiver circuit. When a system failure occurs, each functional module needs to be checked.

[0003] However, given the complexity of the RF circuit system, the system function and performance integrity are generally verified by disassembling the machine and testing each indicator item by item. Sometimes disassembling the machine will affect the system indicators, and even worse, the electrical connector will be damaged during the disassembly process. Therefore, we propose a detection device and method for the RF front-end transceiver closed-loop system to solve the above problems. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a detection device and method for a radio frequency front-end transceiver self-closed-loop system that realizes self-closed-loop detection of the radio frequency front-end module, improves self-detection efficiency, has strong real-time performance, and effectively verifies the integrity of system functions.

[0005] In a first aspect, the present application provides a detection device for a radio frequency front-end transceiver closed-loop system, comprising:

[0006] A signal transmission link, the signal transmission link comprising: a coupling module, a unidirectional transmission module and an antenna connected in communication; the coupling module is connected to a signal processing link for receiving and amplifying a first radio frequency signal;

[0007] An antenna receiving channel, the antenna receiving channel comprising: a limiting module and a low noise amplification module in communication connection; the limiting module is in communication connection with the unidirectional transmission module;

[0008] A first switch having a first single-end and a first double-throw end; the first single-end is electrically connected to the coupling module; one end of the first double-throw end corresponds to a first load end of a first load, and the other end thereof corresponds to a signal input end of the low-noise amplifier module;

[0009] A second switch having a second single-end and a second double-throw end; the second single-end is electrically connected to the limiting module; one end of the second double-throw end corresponds to a second load end of a second load, and the other end thereof corresponds to a signal input end of the low-noise amplifier module;

[0010] When the RF front-end transceiver closed-loop system is in the self-detection mode, the first double-throw terminal is thrown to the signal input terminal, and the second double-throw terminal is thrown to the second load terminal. The signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by the coupling module to obtain a coupled RF signal and a main RF signal, and the coupled RF signal enters the low-noise amplification module through the first switch, and the main RF signal is emitted through the unidirectional transmission module and the antenna; and the signal received by the antenna is transmitted to the second load and consumed through the unidirectional transmission module, the limiting module, and the second switch.

[0011] According to the technical solution provided in the embodiment of the present application, the signal processing link includes: a signal input module and a signal amplification module that are communicatively connected;

[0012] The signal input module is configured to receive a radio frequency signal;

[0013] The signal amplification module is configured to receive and amplify the first radio frequency signal, obtain an amplified radio frequency signal, and transmit the amplified radio frequency signal to the coupling module.

[0014] According to the technical solution provided in the embodiment of the present application, when the RF front-end transceiver closed-loop system is in the signal transceiver mode, the first double-throw terminal is thrown to the first load terminal, and the second double-throw terminal is thrown to the signal input terminal;

[0015] When the RF front-end transceiver self-closed loop system transmits a signal, the signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by the coupling module to obtain a main RF signal and a coupled RF signal; the main RF signal is transmitted to the antenna via the unidirectional transmission module and emitted; the coupled RF signal is transmitted to the first load via the first switch and consumed;

[0016] When the RF front-end transceiver receives a signal from the closed-loop system, the signal received by the antenna is limited in amplitude by the limiting module and transmitted to the low-noise amplifier module through the second switch.

[0017] According to the technical solution provided in the embodiment of the present application, the first switch and the second switch are single-pole double-throw switches.

[0018] In a second aspect, the present application provides a detection method for a detection device of a radio frequency front-end transceiver closed-loop system, comprising the following steps:

[0019] Throw the first double-throw terminal to the signal input terminal, and throw the second double-throw terminal to the second load terminal;

[0020] receiving a first radio frequency signal;

[0021] amplifying the first radio frequency signal to obtain an amplified radio frequency signal;

[0022] coupling and amplifying the radio frequency signal to obtain a coupled radio frequency signal and a main radio frequency signal;

[0023] The coupled RF signal enters the low noise amplifier module through the first switch, and the main RF signal is sent out through the unidirectional transmission module and the antenna;

[0024] The signal received by the antenna is transmitted to the second load via the unidirectional transmission module, the limiting module and the second switch and consumed.

[0025] According to the technical solution provided in the embodiment of the present application, the following steps are also included:

[0026] Get the preset amplitude;

[0027] The waveform data of the coupled RF signal is analyzed. If its amplitude is equal to the preset amplitude, the RF front-end transceiver closed-loop system is fault-free.

[0028] In summary, the present application specifically discloses a specific structure of a detection device for a radio frequency front-end transceiver closed-loop system. The present application designs a signal processing link, a signal transmission link and an antenna receiving channel for communication connection to realize normal signal transmission and reception, and adds a first switch and a second switch so that the system has a self-detection working mode; specifically, the first switch has a first single-ended end and a first double-throw end, the first single-ended end is electrically connected to the coupling module, one end of the first double-throw end corresponds to the first load end of the first load, and the other end thereof corresponds to the signal input end of the low-noise amplifier module, the second switch has a second single-ended end and a second double-throw end, the second single-ended end is electrically connected to the limiting module, one end of the second double-throw end corresponds to the second load end of the second load, and the other end thereof corresponds to the signal input end of the low-noise amplifier module; when the system is in the self-detection mode, the first double-throw end is thrown at the signal input end, the second double-throw end is thrown at the second load end, the signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by the coupling module to obtain a coupled RF signal and a main RF signal, the coupled RF signal enters the low-noise amplifier module through the first switch, and the main RF signal is emitted through the unidirectional transmission module and the antenna; and the signal received by the antenna is transmitted to the second load and consumed through the unidirectional transmission module, the limiting module and the second switch. By transmitting the coupled RF signal to the low-noise amplifier module via the first switch, and comparing the amplitude of the coupled RF signal with the preset amplitude, if the two are equal, it is proved that there is no fault in the system, thereby effectively verifying the integrity of the system function and improving the self-check efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0030] Figure 1This is the schematic diagram of the RF front-end transceiver closed-loop system in self-detection mode.

[0031] Figure 2 This is the schematic diagram of the RF front-end transceiver closed-loop system when it is in the signal transmission and reception mode.

[0032] Numbers in the figure: 1. Coupling module; 2. One-way transmission module; 3. Antenna; 4. Limiting module; 5. Low-noise amplification module; 6. First switch; 7. First load; 8. Second switch; 9. Second load; 10. Signal input module; 11. Signal amplification module. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the inventions. It should also be noted that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Example 1

[0036] Please refer to Figure 1 The principle block diagram of the first embodiment of a detection device for a radio frequency front-end transceiver closed-loop system provided by the present application includes:

[0037] A signal transmission link, the signal transmission link comprising: a coupling module 1, a unidirectional transmission module 2 and an antenna 3 in communication connection; the coupling module 1 is connected to a signal processing link for receiving and amplifying a first radio frequency signal;

[0038] The coupling module 1 is configured to couple the amplified first RF signal to obtain a coupled RF signal and a main RF signal; the frequency of the main RF signal is greater than the frequency of the coupled RF signal. The coupling module 1 may be a coupler, such as HCNR200, which makes the system stable and less prone to unstable phenomena such as self-excitation.

[0039] The unidirectional transmission module 2 is configured to unidirectionally transmit the main RF signal to the antenna 3, or unidirectionally transmit the signal received by the antenna 3 to the limiting module 4. The type of the unidirectional transmission module 2 can be a circulator, and its model is, for example, HXJ33-20DB.

[0040] The antenna receiving channel includes: a limiting module 4 and a low noise amplification module 5 which are in communication connection; the limiting module 4 is in communication connection with the unidirectional transmission module 2;

[0041] The limiting module 4 is configured to transmit the signal received by the antenna 3 to the limiting module 4 via the unidirectional transmission module 2. The limiting module 4 limits the amplitude of the signal to prevent the power amplifier signal from leaking and burning the antenna receiving channel. The type of the limiting module 4 can be a limiter, and its model is, for example, the RLM-43-5W+ chip of Mini Circuits; it is used to limit the large received signal to prevent the power amplifier signal from leaking and burning the low-noise amplifier chip at the back end, and its frequency range is 20-4000MHz, the insertion loss is 0.36dB, and the operating temperature is -40~85℃.

[0042] The low noise amplifier module 5 is configured to improve the signal-to-noise ratio of the transmission signal. The type of the low noise amplifier module 5 can be a low noise amplifier, and its model is, for example, an SPF5043Z chip; its operating frequency range is 50MHz to 4000MHz, and it has the characteristics of ultra-low noise (0.8dB at 900MHz), high gain (18.2dB at 900MHz), and high linearity (OIP3 = 35dBm at 1900MHz), and the maximum operating temperature can reach 85°C.

[0043] A first switch 6, having a first single-end and a first double-throw end; the first single-end is electrically connected to the coupling module 1; one end of the first double-throw end corresponds to a first load end of a first load 7, and the other end thereof corresponds to a signal input end of the low-noise amplifier module 5;

[0044] A second switch 8, having a second single-end and a second double-throw end; the second single-end is electrically connected to the limiting module 4; one end of the second double-throw end corresponds to the second load end of the second load 9, and the other end corresponds to the signal input end of the low-noise amplifier module 5;

[0045] Furthermore, the first switch 6 and the second switch 8 may be single-pole double-throw switches, such as single-pole double-throw RF switches suitable for 100-2700MHz. The two switches may be switched simultaneously, so that the system switches back and forth between the self-detection mode and the signal receiving and transmitting mode.

[0046] Specifically, when the RF front-end transceiver closed-loop system is in the self-detection mode, the first double-throw terminal is thrown at the signal input terminal, the second double-throw terminal is thrown at the second load terminal, the signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by the coupling module 1 to obtain a coupled RF signal and a main RF signal, the coupled RF signal enters the low-noise amplification module 5 through the first switch 6, and the main RF signal is sent out through the unidirectional transmission module 2 and the antenna 3; and the signal received by the antenna 3 is transmitted to the second load 9 through the unidirectional transmission module 2, the limiting module 4, and the second switch 8 and consumed. Here, the signal received by the antenna 3 can be consumed in a heat dissipation manner.

[0047] In the self-detection mode, the coupled RF signal is transmitted to the low-noise amplifier module 5 via the first switch 6, and the amplitude of the coupled RF signal is compared with the preset amplitude. If the two are equal, it is proved that there is no fault in the system, thereby effectively verifying the integrity of the system function and improving the self-detection efficiency.

[0048] Further, the signal processing link comprises: a signal input module 10 and a signal amplification module 11 which are communicatively connected;

[0049] The signal input module 10 is configured to receive a radio frequency signal;

[0050] The type of the signal input module 10 may be an electrical connector, and its model is, for example, JXP-10-12.

[0051] The signal amplifying module 11 is configured to receive and amplify the first radio frequency signal, obtain an amplified radio frequency signal, and transmit the amplified radio frequency signal to the coupling module 1 .

[0052] Among them, the type of signal amplification module 11 can be a power amplifier, and its model is, for example, a PHA-13HLN+ chip; the power amplifier is a wide-band, low-noise, high P1dB amplifier, and the frequency band can cover 1M~1GHz (including UHF band), the noise is 1.1dB at 0.5GHz, and the P1dB is 28.7dBm.

[0053] Furthermore, if Figure 2 As shown, when the RF front-end transceiver closed-loop system is in a signal transceiver mode, the first double-throw terminal is thrown to the first load terminal, and the second double-throw terminal is thrown to the signal input terminal;

[0054] When the RF front-end transceiver self-closed loop system transmits a signal, the signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by the coupling module 1 to obtain a main RF signal and a coupled RF signal; the main RF signal is transmitted to the antenna 3 via the unidirectional transmission module 2 and emitted; the coupled RF signal is transmitted to the first load 7 via the first switch 6 and consumed; here, the coupled RF signal can be consumed in the form of heat dissipation.

[0055] When the RF front-end transceiver receives a signal from the closed-loop system, the signal received by the antenna 3 is amplitude-limited by the limiting module 4 and transmitted to the low-noise amplifier module 5 via the second switch 8 .

[0056] Example 2

[0057] A detection method of a detection device of a radio frequency front-end transceiver closed-loop system according to Embodiment 1 comprises the following steps:

[0058] Throw the first double-throw terminal to the signal input terminal, and throw the second double-throw terminal to the second load terminal;

[0059] receiving a first radio frequency signal;

[0060] amplifying the first radio frequency signal to obtain an amplified radio frequency signal;

[0061] coupling and amplifying the radio frequency signal to obtain a coupled radio frequency signal and a main radio frequency signal;

[0062] The coupled RF signal enters the low noise amplifier module 5 through the first switch 6, and the main RF signal is sent out through the unidirectional transmission module 2 and the antenna 3;

[0063] The signal received by the antenna 3 is transmitted to the second load 9 via the unidirectional transmission module 2, the limiting module 4 and the second switch 8 and consumed.

[0064] Furthermore, the method further comprises the following steps:

[0065] Get the preset amplitude;

[0066] The waveform data of the coupled RF signal is analyzed. If its amplitude is equal to the preset amplitude, the RF front-end transceiver closed-loop system is fault-free.

[0067] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A detection device for a radio frequency front-end transceiver closed-loop system, characterized in that: include: A signal transmission link, the signal transmission link comprising: a coupling module (1), a unidirectional transmission module (2) and an antenna (3) in communication connection; the coupling module (1) is connected to a signal processing link for receiving and amplifying a first radio frequency signal; An antenna receiving channel, the antenna receiving channel comprising: a limiting module (4) and a low noise amplification module (5) in communication connection; the limiting module (4) is in communication connection with the unidirectional transmission module (2); a first switch (6) having a first single-end and a first double-throw end; the first single-end is electrically connected to the coupling module (1); one end of the first double-throw end corresponds to a first load end of a first load (7), and the other end corresponds to a signal input end of the low-noise amplifier module (5); a second switch (8), having a second single-end and a second double-throw end; the second single-end is electrically connected to the limiting module (4); one end of the second double-throw end corresponds to a second load end of a second load (9), and the other end corresponds to a signal input end of the low-noise amplifier module (5); When the RF front-end transceiver closed-loop system is in a self-detection mode, the first double-throw terminal is thrown at the signal input terminal, the second double-throw terminal is thrown at the second load terminal, the signal processing link amplifies the received first RF signal to obtain an amplified RF signal; the amplified RF signal is coupled by a coupling module (1) to obtain a coupled RF signal and a main RF signal, the coupled RF signal enters the low-noise amplification module (5) through a first switch (6), and the main RF signal is emitted through a unidirectional transmission module (2) and an antenna (3); and the signal received by the antenna (3) is transmitted to a second load (9) through the unidirectional transmission module (2), a limiting module (4), and a second switch (8) and consumed.

2. The detection device of the radio frequency front-end transceiver closed-loop system according to claim 1, characterized in that: The signal processing link comprises: a signal input module (10) and a signal amplification module (11) which are communicatively connected; The signal input module (10) is configured to receive a radio frequency signal; The signal amplification module (11) is configured to receive and amplify a first radio frequency signal, obtain an amplified radio frequency signal, and transmit the amplified radio frequency signal to the coupling module (1).

3. The detection device of the radio frequency front-end transceiver closed-loop system according to claim 1, characterized in that: When the RF front-end transceiver closed-loop system is in a signal transceiver mode, the first double-throw terminal is thrown to the first load terminal, and the second double-throw terminal is thrown to the signal input terminal; When the radio frequency front-end transceiver self-closed loop system transmits a signal, the signal processing link amplifies the received first radio frequency signal to obtain an amplified radio frequency signal; the amplified radio frequency signal is coupled by a coupling module (1) to obtain a main radio frequency signal and a coupled radio frequency signal; the main radio frequency signal is transmitted to the antenna (3) via the unidirectional transmission module (2) and emitted; the coupled radio frequency signal is transmitted to the first load (7) via the first switch (6) and consumed; When the radio frequency front-end transceiver receives a signal from the closed-loop system, the signal received by the antenna (3) is amplitude-limited by the amplitude limiting module (4) and transmitted to the low-noise amplification module (5) via the second switch (8).

4. The detection device of the radio frequency front-end transceiver closed-loop system according to claim 1, characterized in that: The first switch (6) and the second switch (8) are single-pole double-throw switches.

5. A detection method based on a detection device of a radio frequency front-end transceiver closed-loop system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Throw the first double-throw terminal to the signal input terminal, and throw the second double-throw terminal to the second load terminal; receiving a first radio frequency signal; amplifying the first radio frequency signal to obtain an amplified radio frequency signal; coupling and amplifying the radio frequency signal to obtain a coupled radio frequency signal and a main radio frequency signal; The coupled radio frequency signal enters the low noise amplification module (5) through the first switch (6), and the main radio frequency signal is sent out through the unidirectional transmission module (2) and the antenna (3); The signal received by the antenna (3) is transmitted to the second load (9) via the unidirectional transmission module (2), the amplitude limiting module (4) and the second switch (8) and consumed.

6. A method for detecting a radio frequency front-end transceiver closed-loop system according to claim 5, characterized in that: The following steps are also included: Get the preset amplitude; The waveform data of the coupled RF signal is analyzed. If its amplitude is equal to the preset amplitude, the RF front-end transceiver closed-loop system is fault-free.

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