A radio frequency mechanical switch and a microwave program-controlled step attenuator

Abstract

The present invention proposes a radio frequency mechanical switch, comprising: a moving reed, an elastic clip, a straight line, an attenuator and an electromagnetic relay. The elastic clips are in direct contact. The radio frequency mechanical switch of the present invention solves the fatigue failure problem of the contact point of the attenuator when the radio frequency switch of the program-controlled step attenuator is frequently switched, has good reliability, consistency of repeated switching and adaptability to mechanical stress, and improves The life of the product is improved; the reliability problem of the repeated switching of the moving reed is solved, and the processing and assembly process does not need to increase the corresponding process measures separately, which is simple and convenient, improves the product qualification rate, and reduces the production cost.

Description

technical field [0001] The invention relates to the field of microwave attenuators, in particular to a high-reliability radio frequency mechanical switch suitable for microwave program-controlled step attenuators, and also relates to a microwave program-controlled step attenuator. Background technique [0002] Microwave programmable step attenuator is an indispensable level control component in microwave test system, widely used in various test instruments and test systems such as spectrum analyzer, vector network analyzer, synthesized signal source, and measurement receiver. [0003] At present, microwave program-controlled step attenuators generally use radio frequency switch technology: the electromagnetic relay drives the microwave transmission moving reed to switch between the straight-through transmission line and the attenuator, and realizes different combinations of multiple attenuation units, thereby achieving program-controlled attenuation and step attenuation. Pur...

AI Technical Summary

Problems solved by technology

[0006] The invention proposes a high-reliability radio frequency mechanical switch and a microwave program-controlled step attenuator, which solves the problem of the attenuation sheet when the microwave transmission moving reed mechanically switches between the attenuation sheet and the straight-through transmission line under normal working conditions. The gold-plated layer of the contact part is peeled, bulged or even falls off due to adhesion and wear, and the dielectric substrate is exposed. The contact point is fatigued and the surface state deteriorates, resulting in increased contact resistance, electrical contact failure, and instantaneous DC circuit breakage of the attenuation unit.

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