SIMULTANEOUS SIGNAL AND NOISE ANALYSIS OF A TRAVELLING WAVE FET MIXER

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ABDIPOUR A.A.A.; GHORBANI A.

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Journal Paper

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Journal: AMIRKABIR Year:2001 | Volume:12 | Issue:48 Page(s): 96-108

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Title

SIMULTANEOUS SIGNAL AND NOISE ANALYSIS OF A TRAVELLING WAVE FET MIXER

Author(s)

ABDIPOUR A.A.A. | GHORBANI A. | Issue Writer Certificate

Keywords

FET MIXER

NONLINEAR SIGNAL AND NOISE MODELING

TRAVELING WAVE FET

MM- WAVE ANALYSIS TECHNIQUES

Abstract

A novel kind of microwave mixer is introduced which its operation is based on traveling wave mode. It is shown that increasing the drain-source capacitance of a FET will simultaneously improve the conversion gain and the noise figure of the mixer. Besides, It is shown that exciting the input signal from one end of the gate electrode and extracting the out put signal from the opposite end of the drain electrode. Can improve the device performance, provided that two remaining ends of the gate and the dram are properly loaded. The analysis is performed using sliced modeling of active circuits. .This structure can be used in high power application because it is specially used for FETs with large gate width. Also due to the traveling wave structure, it is useful for wideband circuits. This idea can also be applied to analyses and improve the signal and noise performances of other microwave and mm-wave integrated circuits.

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