Ultra-wideband receiver with self-mixing structure

Abstract

The invention discloses an ultra-wideband receiver with a self-mixing structure. A low noise amplifier (1) is an initial end of the ultra-wideband receiver with the self-mixing structure, the input end of the low noise amplifier receives a radio frequency input signal, and the output end of the low noise amplifier is connected to the input end of an ultra-wideband coupler (2); the through end of the ultra-wideband coupler (2) is connected to the radio frequency input end of an ultra-wideband mixer (4), and the coupling end of the ultra-wideband coupler is connected to the input end of a carrier extraction circuit (3); the output end of the carrier extraction circuit (3) is connected to the local oscillator input end of the ultra-wideband mixer (4); the output end of the ultra-wideband mixer (4) is connected to the input end of a low-pass filter (5); and the low-pass filter (5) is an end device of the invention, and the output end of the low-pass filter outputs a required intermediate frequency signal. According to the scheme of the invention, a carrier of an incoming wave signal is extracted and taken as a local oscillator, and thus the circuit structure of the ultra-wideband receiver can be greatly simplified, the number of channels and the cost of products can be reduced, and a better channel consistency can also be achieved.

Description

technical field [0001] The invention relates to an ultra-wideband receiver, in particular to an ultra-wideband receiver with a self-mixing structure. Background technique [0002] UWB receiver is an important part of passive radar system and UWB wireless communication system. It has the functions of frequency conversion, filtering and amplification of external input RF signals in a wide frequency range. The traditional ultra-wideband radar receiver needs to measure the frequency of the input signal and sort the receiving channel, and divide the received signal into multiple narrowband sub-channels through multiple transmission channels to complete the signal reception. Each channel of a traditional ultra-wideband receiver needs a corresponding local oscillator signal input, the circuit structure is complex, and it is difficult to achieve the consistency of amplitude and phase between channels. Contents of the invention [0003] The purpose of the present invention is to p...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-wideband receiver with a self-mixing structure, which solves the problems that the traditional ultra-wideband receiver has a complex structure and high difficulty in achieving amplitude-phase consistency

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