Terahertz frequency multiplier with multi-level lower waveguide matching structure

Abstract

The invention provides a terahertz frequency multiplier with a multi-level lower waveguide matching structure, and belongs to the technical field of terahertz devices. The terahertz frequency multiplier is simple in structure and convenient to process; a plurality of lower waveguide matching structure sections are introduced to the input end and the output end of the multiplier to reduce the characteristic impedance of the waveguide, and therefore, a matching circuit of a probe circuit and a main circuit of the frequency multiplier can be simplified, and moreover, single-die transmission can be performed for an input signal through a main die and while some stray waves at the output end of the frequency multiplier can be inhibited.

Description

technical field [0001] The invention belongs to the technical field of terahertz devices, and in particular relates to a terahertz frequency multiplier based on a multi-stage height-reducing waveguide to realize a matching structure. Background technique [0002] Generally, electromagnetic waves with a frequency of 0.1-10THz are defined as terahertz waves, which are between millimeter waves and infrared light, and are in the transition zone from electronics to photonics. The terahertz frequency band is called submillimeter wave in the field of radio physics, and it is customarily called far-infrared light in the field of optics. THz wave has unique characteristics such as transient, broadband, coherence, and low energy. , communications, radar, and radio astronomy are widely used. [0003] Due to the high frequency of terahertz waves, in order to obtain a stable and reliable signal source, it is often necessary to obtain terahertz waves by frequency doubling. In the design...

AI Technical Summary

Problems solved by technology

In the design of the frequency multiplier, the matching of the circuit directly determines the frequency multiplication efficiency and output power of the frequency multiplier, and the input and output waveguides in the frequency multiplier are relatively large in size so that their equivalent characteristic impedance often It can reach hundreds of ohms. Compared with the 50 ohms commonly used in the main transmission line and the best input impedance of nonlinear devices, it is huge. Under the condition of satisfying the corresponding bandwidth, a complex matching network is often required for corresponding impedance transformation and matching. Not only will it lead to the complexity of the frequency multiplier structure, but too many matching modules will inevitably cause more losses, which is not conducive to improving the efficiency and output power of the frequency multiplier

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