W-band differential low-noise amplifier for phased array radar

Abstract

The invention discloses a W-band differential low-noise amplifier for a phased array radar, which comprises a first-stage differential common-emitter common-base amplification circuit, an inter-stage matching network and a second-stage differential common-emitter common-base amplification circuit which are sequentially cascaded, the first-stage differential common-emitter common-base amplification circuit and the second-stage differential common-emitter common-base amplification circuit are symmetrical in circuit structure, and the inter-stage matching network adopts a transformer matching mode. The circuit has the advantages that the influence of common-mode noise is greatly suppressed, the inter-stage matching network adopts a transformer matching mode, the structure is compact, the isolation effect is good, the circuit structure is simple, the environmental noise and power supply noise suppression effect is good, and the working performance is good.

Description

Technical field [0001] The present invention relates to the technical field of low noise amplifiers, and more particularly to a W-band differential low noise amplifier for phased array radar. Background technique [0002] Millimeter wave (30-300GHz) frequency band spectrum resources are very rich, there is a lot of advantages over 30GHz or less, the spectral bandwidth is wider, the wavelength is shorter, so short-range high-speed wireless communication systems, high-resolution radar and high resolution imaging The system has received attention and has developed rapidly. Among them, the W-band covers the electromagnetic spectrum of 75GHz to 110GHz, and the W-band radar system has the characteristics of frequency bandwidth, short wavelength, narrow beam, low power consumption, low power consumption, and strong power consumption, power consumption, and strength. [0003] Low Noise Amplifiers (LNA, Low Noise Amplifier) ​​As the pre-amplifier of the phase-controlled radar system recei...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention lies in the fact that the structure of the prior art low-noise amplifier is relatively complex, the parasitic effect is obvious, the effect of suppressing environmental noise and power supply noise is poor, and the performance cannot be improved.

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