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Multifunctional communication signal measurement radio frequency front-end circuit

A radio frequency front-end and communication signal technology, which is applied in the field of communication measuring instruments, can solve the problems of unsure radio frequency parameters, poor anti-interference performance, poor sensitivity of radio frequency problems, etc., and achieve excellent anti-interference effect

Inactive Publication Date: 2015-09-09
CHNEGDU CHIFFO ELECTRONICS INSTR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The object of the present invention is to provide a radio frequency front-end circuit with strong anti-interference and multi-functional communication signal measurement. Instead of radio frequency signals, there are disadvantages such as poor sensitivity to radio frequency problems, poor anti-interference performance, and uncertainty of radio frequency parameters.

Method used

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  • Multifunctional communication signal measurement radio frequency front-end circuit

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Embodiment Construction

[0025] When measuring the emission performance, the high-power RF signal of the measuring transmitter is input to the "high-power port (T / R port) 108" and then enters the whole RF front-end. After passing through the attenuator 109, it enters the power divider 110, and one output signal of the power divider 110 enters the radio frequency power detection circuit to obtain the power of the radio frequency signal; the other output signal of the power divider enters the radio frequency input amplitude conditioning circuit. If the instrument is set to "antenna port (Ant port) 101", it will directly enter the input amplitude conditioning circuit after being switched by a switch. The signal after amplitude conditioning 104 is down-converted 105 . The down-converted intermediate frequency signal is subjected to intermediate frequency conditioning 106 , and finally the intermediate frequency output 107 .

[0026] During transmitter testing, there are two input ports: high-power port (...

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Abstract

The invention provides a multifunctional communication signal measurement radio frequency front-end circuit, comprising a transmitter test circuit, a receiver signal output circuit, a broadband power measurement and standing wave cable test circuit, a high power port (T / R port), an antenna port (Ant port) and a standing-wave ratio port (Swr port). According to the test access, in testing a transmitter, narrowband power measurement and demodulation analysis of input signals can be realized; in testing a receiver, the amplitudes of the input signals are controlled to realize only high power port broadband power measurement; in standing-wave test and cable test, single port standing-wave detection and cable fault positioning are realized; and in a test process, Ant port and Swr port power protection circuits are realized. The multifunctional communication signal measurement radio frequency front-end circuit possesses excellent interference immunity and directivity, has antenna system quality evaluating parameters for testing SWR, transmission loss, echo loss, etc, and realizes function measurement of a plurality of communication signals.

Description

Technical field: [0001] The invention relates to a communication measuring instrument, in particular to a radio frequency front-end circuit for multifunctional communication signal measurement in the communication measuring instrument. technical background: [0002] A hand-held comprehensive tester is mainly used for on-site testing of radio communication equipment, scattering communication equipment and tactical control and navigation systems, and on-site testing support for short-wave, ultra-short-wave and other communication equipment. Testing capabilities such as performance characteristics. [0003] The RF front-end refers to the part between the antenna and the intermediate frequency (or baseband) circuit in the communication system. In this section, the signal is transmitted in the form of radio frequency, and the radio frequency front-end circuit includes a receiving path and a transmitting path. [0004] At present, time domain reflectometer (TDR) technology is us...

Claims

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Application Information

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IPC IPC(8): G01R31/08G01R27/06H04B17/00
Inventor 邹金强向东红刘克农
Owner CHNEGDU CHIFFO ELECTRONICS INSTR