High-dynamic high-gain broadband receiver

Abstract

The invention discloses a high-dynamic high-gain broadband receiver which comprises a radio frequency front end circuit, a multistage electronic speed controller attenuator circuit, a two-stage frequency mixing circuit and multistage gain amplifiers. The radio frequency front end circuit is mainly formed by a first-stage electronic speed controller attenuator, an LNA and a first-stage gain amplifier; the multistage electronic speed controller attenuator circuit is formed by electronic speed controller attenuators, integrating circuits, detection tubes and power dividers; the two-stage frequency mixing circuit is mainly formed by frequency mixers and local oscillators of two broadbands; the multistage gain amplifiers are formed by multiple gain amplifiers and are in cascade connection. The high-dynamic high-gain broadband receiver has the advantages that the high-gain dynamic range of the receiver can be achieved, the multistage frequency mixing circuit broadens radio frequency bandwidths, and the multistage gain amplifiers guarantee high gain; a pure analog circuit is adopted for the whole receiver link, digital interfaces are not needed, debugging is convenient to carry out, and work efficiency is improved; reliability of products is improved, fitness is high, and antijamming capability is high.

Description

technical field [0001] The invention belongs to the field of mobile communication, and relates to a high-dynamic and high-gain wideband receiver. Background technique [0002] At present, in our mobile communication products, the gain of the receiver is getting higher and higher, and the sensitivity requirements of the receiver are becoming more and more stringent. Sometimes the signal received by the antenna is relatively large, which often affects the normal use of the receiver. Nowadays, the antenna port The received signal often encounters when it changes from weak to strong. At this time, it is hoped that the normal operation of the receiver will not be affected. That is, when the signal received by the antenna port is very strong or very weak, it is hoped that the IF output power of the receiver will not be affected. Change, which requires the design of a high dynamic range, high gain receiver. Sometimes this kind of receiver still can't meet the requirements of commu...

AI Technical Summary

Problems solved by technology

Sometimes this kind of receiver still cannot meet the requirements of communication. Often the current radio frequency signal is very wide, and entering the traditional receiver will bring a lot of spurs, which requires a wideband receiver

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