W-band high-gain low-noise amplifier circuit

Abstract

The invention discloses a W-band high-gain low-noise amplifier circuit, which comprises cascaded three-stage amplification circuits which all adopt common-emitter and common-base amplification structures and comprise an input matching network, an input tuning inductor, a common-emitter transistor, an interconnection inductor, a common-base transistor, a bias decoupling capacitor and an output matching network; the input end of the input matching network is connected with an input signal, and the input tuning inductor is connected in series between the output end and the base of the common-emitter transistor; an interconnection inductor is connected in series between the collector of the common emitter transistor and the emitter of the common base transistor; the base electrode of the common-base transistor is connected with one end of the bias decoupling capacitor and the VDD, and the other end of the bias decoupling capacitor is grounded; and the collector of the common-base transistor is connected with the output matching network which is connected with the VDD at the same time. The emitters of the common emitter transistors of the second-stage amplification circuit and the third-stage amplification circuit are directly grounded, and the first stage is grounded through an emitter feedback inductor. According to the invention, high gain and low noise coefficient of the W wave band can be realized.

Description

technical field [0001] The invention belongs to the field of microwave integrated circuits, in particular to a W-band high-gain low-noise amplifier circuit. Background technique [0002] With the rapid development of wireless communication technology, in order to solve the problem of frequency band congestion and pursue high transmission rates, wireless communication frequencies have been developed towards higher frequency millimeter waves. The "atmospheric window" 94GHz located in the W band of 75GHz-110GHz has become a research hotspot in academia and industry due to its atmospheric attenuation characteristics, and the application fields involved have covered satellite communication, radar, space detection, and remote sensing. and imaging fields. [0003] As the first active module in the front end of a receiver in a wireless communication system, a low noise amplifier is usually directly connected to the antenna. Due to the long-distance transmission and the complex ext...

AI Technical Summary

Problems solved by technology

Due to the long-distance transmission and the complex external environment where the signal is transmitted, the signal received by the antenna is not only weak but also seriously interfered

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