Antenna detection circuit

Abstract

The utility model relates to the technical field of electronic circuits, in particular to an antenna detection circuit, which is provided with a radio frequency transceiver, a transmission module and a detection module. The transmission module is connected with the radio frequency transceiver and the antenna, and the detection module is connected with the transmission module and the radio frequency transceiver; the radio frequency transceiver is used for outputting a first radio frequency signal; the transmission module is used for transmitting the first radio frequency signal to the antenna; the detection module is used for receiving a second radio frequency signal reflected by the antenna through the transmission module, converting the second radio frequency signal into a direct current signal and outputting the direct current signal to the radio frequency transceiver; the radio frequency transceiver is also used for detecting the connection state of the antenna and the transmission module according to the direct current signal and the first radio frequency signal; the antenna detection circuit is arranged to detect the transmitted radio frequency signal and the reflected radio frequency signal, so that the connection state of the antenna and the transmission module can be determined, assembly detection of the antenna is further realized, a special test station does not need to be arranged in the process, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of electronic circuits, specifically to an antenna detection circuit. Background Technology

[0002] Currently, after most communication equipment is manufactured and assembled, the reliability of the antenna adapter needs to be tested. This usually requires setting up a dedicated antenna assembly reliability test station, a test computer, and wireless signal testing instruments. The station is expensive to set up, and each device requires testing time. Therefore, current antenna testing equipment has the problem of high cost. Utility Model Content

[0003] The purpose of this invention is to provide an antenna detection circuit to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an antenna detection circuit, comprising a circuit module and an antenna, wherein the circuit module is connected to the antenna, and the circuit module includes:

[0005] A radio frequency transceiver, wherein the radio frequency transceiver is used to output a first radio frequency signal;

[0006] A transmission module, which is connected to the radio frequency transceiver and the antenna, is used to transmit the first radio frequency signal to the antenna;

[0007] A detection module, which is connected to the transmission module and the radio frequency transceiver, is used to receive the second radio frequency signal reflected by the antenna through the transmission module and convert the second radio frequency signal into a DC signal and output it to the radio frequency transceiver.

[0008] The radio frequency transceiver is also adapted to detect the connection state between the antenna and the transmission module based on the DC signal and the first radio frequency signal.

[0009] Preferably, the radio frequency transceiver is specifically used to calculate the standing wave ratio (SWR) based on the DC signal and the first radio frequency signal, and output a first prompt signal when the SWR is greater than a preset value, and output a second prompt signal when the SWR is equal to the preset value; the first prompt signal is used to indicate that the connection between the antenna and the transmission module is abnormal, and the second prompt signal is used to indicate that the connection between the antenna and the transmission module is normal.

[0010] Preferably, the detection module includes a coupling unit and a detection unit. The coupling unit is coupled to the transmission module and is also connected to the detection unit. The detection unit is also connected to the radio frequency transceiver. The coupling unit is used to receive the second radio frequency signal received by the transmission module through coupling and output the second radio frequency signal to the detection unit. The detection unit is used to convert the second radio frequency signal into a DC signal and output it to the radio frequency transceiver.

[0011] Preferably, the coupling unit includes a coupling line and a first resistor, the transmission module includes a signal transmission line, the coupling line is coupled in parallel with the signal transmission line, one end of the coupling line is connected to the first resistor, the other end of the coupling line is connected to the detection unit, and the other end of the first resistor is grounded; one end of the signal transmission line is connected to the radio frequency transceiver, and the other end of the signal transmission line is connected to the antenna.

[0012] Preferably, the detection unit includes a second resistor, one end of which is connected to one end of the coupling line, and the other end of which is connected to the radio frequency transceiver.

[0013] Preferably, the radio frequency transceiver is connected to an indicator module.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model proposes an antenna detection circuit, which includes an RF transceiver, a transmission module, and a detection module. The transmission module is connected to the RF transceiver and the antenna, and the detection module is connected to the transmission module and the RF transceiver. The RF transceiver outputs a first RF signal. The transmission module transmits the first RF signal to the antenna. The detection module receives a second RF signal reflected by the antenna through the transmission module and converts the second RF signal into a DC signal, which is then output to the RF transceiver. The RF transceiver also detects the connection status between the antenna and the transmission module based on the DC signal and the first RF signal. In this application, the connection status between the antenna and the transmission module can be determined by detecting the transmitted and reflected RF signals using an antenna detection circuit, thereby achieving antenna assembly detection. This process does not require a dedicated testing station, reducing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the current connection structure of this utility model.

[0017] Figure 2 This is a schematic diagram of another embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please refer to Figures 1-2. This utility model provides a technical solution: an antenna detection circuit, including a circuit module and an antenna. The circuit module is connected to the antenna and includes: a radio frequency transceiver for outputting a first radio frequency signal; a transmission module connected to the radio frequency transceiver and the antenna for transmitting the first radio frequency signal to the antenna; and a detection module connected to the transmission module and the radio frequency transceiver for receiving a second radio frequency signal reflected by the antenna through the transmission module and converting the second radio frequency signal into a DC signal for output to the radio frequency transceiver. The radio frequency transceiver is also suitable for detecting the connection state between the antenna and the transmission module based on the DC signal and the first radio frequency signal. In this utility model, the connection state between the antenna and the transmission module can be determined by detecting the transmitted and reflected radio frequency signals through the circuit module, thereby realizing the assembly detection of the antenna. This process does not require a dedicated test station, achieving rapid detection while reducing testing costs.

[0020] The radio frequency transceiver is specifically used to calculate the standing wave ratio (SWR) based on the DC signal and the first radio frequency signal. When the SWR is greater than a preset value, it outputs a first prompt signal, and when the SWR is equal to the preset value, it outputs a second prompt signal. The first prompt signal is used to indicate that the connection between the antenna and the transmission module is abnormal, that is, the antenna assembly of the terminal device is abnormal and the antenna and the transmission module have poor contact. The second prompt signal is used to indicate that the connection between the antenna and the transmission module is normal, that is, the antenna assembly of the terminal device is normal, the transmission module and the antenna have good contact, and the first radio frequency signal can be successfully transmitted through the antenna.

[0021] The detection module includes a coupling unit and a detection unit. The coupling unit is coupled to the transmission module and is also connected to the detection unit. The detection unit is also connected to the radio frequency transceiver. The coupling unit is used to receive the second radio frequency signal received by the transmission module through coupling and output the second radio frequency signal to the detection unit. The detection unit is used to convert the second radio frequency signal into a DC signal and output it to the radio frequency transceiver.

[0022] The coupling unit includes a coupling line and a first resistor. The transmission module includes a signal transmission line. The coupling line is coupled in parallel with the signal transmission line. One end of the coupling line is connected to the first resistor, and the other end of the coupling line is connected to the detection unit. The other end of the first resistor is grounded. One end of the signal transmission line is connected to the radio frequency transceiver, and the other end of the signal transmission line is connected to the antenna.

[0023] The detection unit includes a second resistor, one end of which is connected to one end of the coupling line, and the other end of which is connected to the radio frequency transceiver.

[0024] In another embodiment, the RF transceiver is connected to an indicator module. The indicator module outputs first indicator information based on a first indicator signal to indicate an abnormal contact between the antenna and the transmission module; the indicator module outputs second indicator information based on a second indicator signal to indicate a good contact between the antenna and the transmission module. For example, the indicator module is specifically an indicator light, which can emit red light based on the first indicator signal or green light based on the second indicator signal, thereby visually indicating the current connection status between the antenna and the transmission module.

[0025] The circuit module of this utility model includes an RF transceiver, a transmission module, and a detection module. The transmission module is connected to the RF transceiver and the antenna, and the detection module is connected to the transmission module and the RF transceiver. The RF transceiver is used to output a first RF signal. The transmission module is used to transmit the first RF signal to the antenna. The detection module is used to receive a second RF signal reflected by the antenna through the transmission module and convert the second RF signal into a DC signal to output to the RF transceiver. The RF transceiver is also used to detect the connection status between the antenna and the transmission module based on the DC signal and the first RF signal. In this application, the connection status between the antenna and the transmission module can be determined by setting up an antenna detection circuit to detect the transmitted RF signal and the reflected RF signal, thereby realizing the assembly and testing of the antenna. In this process, it is not necessary to set up a dedicated test station, thus reducing costs.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antenna detection circuit, comprising a circuit module and an antenna, characterized in that: The circuit module is connected to the antenna, and the circuit module includes: A radio frequency transceiver, wherein the radio frequency transceiver is used to output a first radio frequency signal; A transmission module, which is connected to the radio frequency transceiver and the antenna, is used to transmit the first radio frequency signal to the antenna; A detection module, which is connected to the transmission module and the radio frequency transceiver, is used to receive the second radio frequency signal reflected by the antenna through the transmission module and convert the second radio frequency signal into a DC signal and output it to the radio frequency transceiver. The radio frequency transceiver is also adapted to detect the connection state between the antenna and the transmission module based on the DC signal and the first radio frequency signal.

2. The antenna detection circuit according to claim 1, characterized in that: The radio frequency transceiver is specifically used to calculate the standing wave ratio (SWR) based on the DC signal and the first radio frequency signal, and outputs a first prompt signal when the SWR is greater than a preset value, and outputs a second prompt signal when the SWR is equal to the preset value; the first prompt signal is used to indicate that the connection between the antenna and the transmission module is abnormal, and the second prompt signal is used to indicate that the connection between the antenna and the transmission module is normal.

3. The antenna detection circuit according to claim 1, characterized in that: The detection module includes a coupling unit and a detection unit. The coupling unit is coupled to the transmission module and is also connected to the detection unit. The detection unit is also connected to the radio frequency transceiver. The coupling unit is used to receive the second radio frequency signal received by the transmission module through coupling, and output the second radio frequency signal to the detection unit. The detection unit is used to convert the second radio frequency signal into a DC signal and output it to the radio frequency transceiver.

4. The antenna detection circuit according to claim 3, characterized in that: The coupling unit includes a coupling line and a first resistor. The transmission module includes a signal transmission line. The coupling line is coupled in parallel with the signal transmission line. One end of the coupling line is connected to the first resistor, and the other end of the coupling line is connected to the detection unit. The other end of the first resistor is grounded. One end of the signal transmission line is connected to the radio frequency transceiver, and the other end of the signal transmission line is connected to the antenna.

5. The antenna detection circuit according to claim 3, characterized in that: The detection unit includes a second resistor, one end of which is connected to one end of a coupling line, and the other end of which is connected to an RF transceiver.

6. The antenna detection circuit according to claim 1, characterized in that: The radio frequency transceiver is connected to an indicator module.

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