Low noise amplifier and radio frequency front-end circuit

Abstract

The invention provides a low-noise amplifier and a radio frequency front-end circuit. The low-noise amplifier comprises an input matching circuit, a first-stage amplification transistor, a first inter-stage matching circuit, a second-stage amplification transistor, a second inter-stage matching circuit, a third-stage amplification transistor and an output matching circuit which are sequentially cascaded; the first-stage amplification transistor, the second-stage amplification transistor and the third-stage amplification transistor are used for amplifying signals input by grid electrodes; the input matching circuit, the first inter-stage matching circuit, the second inter-stage matching circuit and the output matching circuit are used for realizing impedance matching; wherein the matching frequency point of the first-stage matching circuit is a secondary high frequency point; and the matching frequency point of the second-stage matching circuit is a high-frequency point. Therefore, on the basis of ensuring high gain, the flatness of the circuit is increased, the bandwidth of the circuit is increased, and the broadband low-noise amplifier is realized. Moreover, the low-noise amplifier provided by the invention is relatively simple in circuit structure, relatively small in occupied chip area and relatively low in power consumption.

Description

technical field [0001] The present invention relates to the technical field of millimeter-wave wireless communication, and more specifically, relates to a low-noise amplifier and a radio frequency front-end circuit. Background technique [0002] Compared with microwaves, millimeter waves have the advantages of short wavelength, available frequency bandwidth, small antenna aperture, strong anti-interference ability, high Doppler effect sensitivity, small equipment size, light weight, and good mobility. With the improvement of the device level, the millimeter wave system has been widely used in the fields of precision guidance, electronic countermeasures, communication technology, radio remote sensing, instrumentation and measurement. [0003] The low noise amplifier is the first module at the front end of the receiver in the millimeter wave wireless communication system. It is mainly used to amplify the weak signal received by the antenna and then hand it over to the receiver...

AI Technical Summary

Problems solved by technology

However, the bandwidth of the existing low-noise amplifiers is relatively narrow, which cannot meet the requirements of the wireless communication technology system for the ultra-bandwidth of the low-noise amplifier.

Images