Graphene even harmonic frequency multiplier based on direct current bias and design method

Abstract

The invention discloses a graphene even harmonic frequency multiplier based on direct current bias and a design method. The graphene even harmonic frequency multiplier comprises a cavity, a signal input end, a signal output end and a graphene frequency multiplier substrate, wherein the graphene frequency multiplier substrate comprises a high-frequency medium substrate and graphene arranged on thehigh-frequency medium substrate, wherein the front end and the rear end of the graphene are respectively connected with a signal input end and a signal output end through microstrip lines, a first direct current bias circuit and a second direct current bias circuit are respectively arranged on the microstrip lines close to the signal input end and the signal output end, and a graphene frequency doubling frequency spectrum can be changed after the bias circuit is added. By adding the direct current bias, odd harmonic components can be suppressed, even harmonic components can be amplified, and thus the frequency doubling effect can be improved. The defect that in the prior art, fundamental waves and odd harmonic components generated by graphene under excitation of an electromagnetic field have a natural inhibition function on even harmonics is overcome, even frequency multiplication can be achieved, and wide application space is achieved in the field of terahertz devices and radio frequency chip design.

Description

technical field [0001] The invention relates to a graphene frequency multiplier, in particular to a graphene even-order harmonic frequency multiplier and a design method based on a DC bias. Background technique [0002] Microwave frequency sources are widely used in systems such as communication, guidance, and test instruments. The frequency multiplier is one of the important components of the transceiver components. In microwave and millimeter wave frequency bands, two-port passive frequency multipliers are widely used in frequency conversion circuits. In terms of linearity, noise and bandwidth, passive frequency multipliers have better performance than active frequency multipliers. In recent years, graphene is considered to be the next-generation electronic material due to its high electron traction rate and good thermal conductivity, and has become a hot research direction. [0003] Research has found that graphene will generate fundamental waves and their harmonic comp...

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Problems solved by technology

[0004]But because the graphene two-port frequency multiplier circuit has a natural even harmonic suppression function, so the frequency multiplier is designed for the odd frequency multiplier, It is not yet possible to use it to make even-order harmonic frequency multipliers, and the frequency multiplication efficiency of graphene odd-order harmonic frequency multipliers is low, so it cannot be put into large-scale use

The circuit performance of the graphene frequency multiplier is still unstable, and the circuit assembly needs to be further improved

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