Program-controlled step attenuator flexible transmission structure based on sealing ring

Abstract

The invention discloses a program-controlled step attenuator flexible transmission structure based on a sealing ring. The flexible transmission structure comprises a lower armature fixed to the bottom end of an iron core and two ejector rods connected to the lower armature, the lower armature is provided with two U-shaped grooves, each ejector rod comprises a rod body and a head connected to the top end of the rod body, the diameter of the head is larger than that of the rod body, an annular groove is formed in the head, the portion, located in the annular groove, of the head is an insertion rod portion, an upper sealing ring and a lower sealing ring are connected to the insertion rod portion in a sleeved mode, the insertion rod portion of each ejector rod is inserted into the corresponding U-shaped groove, and the upper sealing ring and the lower sealing ring make close contact with the upper end surface and the lower end surface of the lower armature respectively. The upper sealing ring and the lower sealing ring are installed on the head of the ejector rod, the iron core of an electromagnetic driving unit and the ejector rod are fixed together through the elasticity of the upper sealing ring and the elasticity of the lower sealing ring, in a switching action process of the program-controlled step attenuator, the upper sealing ring and the lower sealing ring reduce force impact in the switching process, and therefore the service life of the program-controlled step attenuator is prolonged.

Description

technical field [0001] The invention relates to the technical field of a program-controlled step attenuator, in particular to a flexible transmission structure of a program-controlled step attenuator based on a sealing ring. Background technique [0002] Programmable step attenuator usually consists of two parts: electromagnetic drive unit and microwave attenuation unit. As the source of driving force, the electromagnetic drive unit is the key component of the program-controlled step attenuator to realize the program control and step function; the microwave attenuation unit is the direct execution part to realize the attenuation function, and the electromagnetic drive unit drives the edge line of the microwave attenuation unit to move back and forth , so that the microwave signal is switched back and forth between the through state and the attenuation state. Therefore, a transmission mechanism is used between the electromagnetic drive unit and the microwave attenuation unit...

AI Technical Summary

Problems solved by technology

The other uses a reed as a transition piece, which is placed between the metal push rod and the ejector rod. This solution can achieve elastic contact, but the installation and positioning are complicated, and the product is bulky, which is not conducive to the miniaturization development trend of the device, and the reed uses Metal material, there will be friction loss with the metal push rod

Images