A Ridge Waveguide Filter with High Microdischarge Threshold and Its Design Method

Abstract

The invention relates to a ridge waveguide filter with a high micro discharging threshold value and a design method thereof. The ridge waveguide filter with the high micro discharging threshold value comprises a cover plate, a filter outer casing, rectangular waveguides, a plurality of sections of ridge waveguides, a filling layer and TNC connectors (threaded Neil-Concelman connector), wherein the inner surface of the cover plate needs to be flattened, the ridge waveguides are connected by the rectangular waveguides, the input ends and the output ends of the ridge waveguides are respectively assembled with each TNC connector, and a polyetherimide material is filled between a ridge of each ridge waveguide and the cover plate. The design method of the filter comprises the following steps of (1) firstly, according to the design parameter requirements of the filter, such as center frequency, working bandwidth and out-of-band inhibition, looking up a table to obtain a lumped parameter model of the filter; (2) carrying out impedance inverting on a filter circuit of the lumped parameters; (3) using the ridge waveguides to replace the lumped parameter elements, such as capacitors and inductors; (4) using the rectangular waveguide structure to realize an impedance inverter; (5) filling the polyetherimide material between the ridge of each ridge waveguide and the cover plate; and (6) optimizing the size of the ridge waveguide filter.

Description

technical field [0001] The invention provides a ridge waveguide filter with high micro-discharge threshold and a design method thereof, belonging to the field of microwave technology. Background technique [0002] The micro-discharge effect, also known as the secondary electron multiplication effect, refers to the secondary electron emission and multiplication effect excited by electrons between two metal surfaces or on the surface of a single medium under the acceleration of an external radio frequency field under vacuum conditions. According to different mechanisms, the micro-discharge effect can be divided into bimetallic surface micro-discharge effect and single-dielectric surface micro-discharge effect. Spacecraft high-power microwave components are prone to bimetallic surface micro-discharge effect. Microdischarge effects are prone to occur in areas with strong internal electric fields of high-power microwave components such as multiplexers and filters in spacecraft, r...

AI Technical Summary

Problems solved by technology

Micro-discharge effects are prone to occur in areas with strong internal electric fields in high-power microwave components of spacecraft such as multiplexers and filters, resulting in failure of high-power microwave components, and even complete failure of the entire payload

The ridge waveguide filter is very suitable for use in satellite payloads due to its wide bandwidth and small size. However, the distance between the ridge and the metal wall of the ridge waveguide filter is small, and the electric field strength is large, which is prone to micro-discharge effects and affects the satellite payload. safe and reliable operation

[0003] The electric field strength between the ridge and the cover plate of the traditional ridge waveguide low-pass filter is large, and the distance is small, which is prone to micro-discharge effect

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