A Double Balanced Mixer Based on Graphene Field Effect Transistor

Abstract

The invention discloses a graphene field effect transistor-based double-balanced mixer. The gates, sources and drains of four graphene field effect transistors are connected together in a crossing manner and are connected with differential input and output ports through an external circuit. According to the graphene field effect transistor-based double-balanced mixer of the invention, the gates, sources and drains of the four graphene field effect transistors are connected together in a crossing manner and are connected with the differential input and output ports through the external circuit, and therefore, based on a cross coupling mode, the high-frequency components of a circuit can be effectively inhibited, linearity can be improved, punch-through can be inhibited, and noises can be reduced.

Description

technical field [0001] The invention relates to the field of mixers, in particular to a double-balanced mixer based on graphene field effect transistors. Background technique [0002] In communication systems and other electronic systems, it is often necessary to convert signals in one radio frequency (RF) band to another intermediate frequency (IF) band, and vice versa, using circuits known as frequency converters or mixers. During this signal frequency conversion process at the mixer, the ratio between the converted output signal power level and the pre-converted input signal power level is called the conversion gain (CG), which measures the efficiency of the conversion process. efficiency. The operating bandwidth of a mixer is often defined as the frequency band over which the conversion gain remains reasonably high. [0003] The output signal of the mixer is distorted and mixed with spurious signals due to the non-linearity of the conversion process. Double-balanced m...

AI Technical Summary

Problems solved by technology

However, the linearity of existing silicon-based mixers is still not high

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