Ultra wideband amplitude equalizer based on defected ground structure

Abstract

The invention discloses an ultra wideband amplitude equalizer based on a defected ground structure. An input port, an input matching circuit, a main transmission line, an output matching circuit and an output port are orderly arranged from signal input to output, a DGS for loading the resistance is arranged on a metal ground layer under a dielectric substrate. The amplitude equalizer disclosed by the invention has the characteristics of ultra wideband, small size and simple structure, is easy for manufacturing and large-scale production, and worthy of popularizing in the industry.

Description

technical field [0001] The invention belongs to the technical field of microwave and millimeter wave integration, and in particular relates to an ultra-wideband amplitude equalizer based on a defect ground structure. Background technique [0002] The equalizer is mainly used in modern radar electronic warfare. It is connected to the input or output of the high-power traveling wave tube and plays the role of gain equalization (amplitude equalizer) or phase equalization (phase equalizer). The key is how to selectively absorb excess microwave energy without reflecting energy back to the input port. For an amplitude equalizer that uses a resonant structure to absorb energy, the former needs to be correctly set up with the resonant structure and absorbing material, and the latter needs to have a good input-output match in the entire frequency band. [0003] Specifications for amplitude equalizers. 1. The transmission characteristic curve of the amplitude equalizer should be exa...

AI Technical Summary

Problems solved by technology

[0013] Disadvantage 1: The wavelength of the traditional planar circuit amplitude equalizer is proportional to the size of the resonant stub, and the resonant stub at the low end of the microwave frequency is longer, and the folding of the resonant stub may cause energy coupling due to the short distance;

[0014] Disadvantage 2: The single resonator of the traditional planar circuit amplitude equalizer absorbs less energy and has a narrow working bandwidth;

[0015] Disadvantage 3: If the traditional planar circuit amplitude equalizer is used to load DGS, DGS and the original resonator exist at the same time, the field distribution is relatively complicated, it is difficult to analyze theoretically, and it is difficult to debug

Images