TM mode double-end short circuit resonant unit

Abstract

The invention relates to a TM (Transverse Magnetic) mode double-end short circuit resonant unit. The unit comprises a resonant cavity, wherein a cover plate is arranged at a mouth of the resonant cavity, and a TM mode resonator is arranged in the resonant cavity. The resonator is tubular, a gasket is arranged between the upper end of the resonator and the cover plate, and the gasket is elastic. A screw hole and a nail hole are formed in the cover plate corresponding to the center of the resonant cavity and in the center of the gasket respectively, and a tuning screw is arranged in the screw hole and the nail hole. The unit is characterized in that a silver coating is arranged on the inner side face of a lower section of the resonator. With the adoption of the TM mode double-end short circuit resonant unit, the size of a TM mode double-end short circuit filter can be reduced, a Q value of the TM mode double-end short circuit filter can be increased, the loss of the TM mode double-end short circuit filter can be reduced, and the short circuit failure of the TM mode double-end short circuit filter can be avoided. The unit is applicable to communication equipment of a wireless base station.

Description

technical field [0001] The invention relates to a filter, in particular to a resonant unit on a TM mode double-terminal short-circuit filter. Applicable to the communication equipment of the wireless base station. Background technique [0002] With the rapid development of communication technology, the requirements for components of wireless communication base stations are getting higher and higher, and low-loss and miniaturized components are more and more welcomed by communication equipment manufacturers. Although the current TM-mode double-terminal short-circuit resonator can be miniaturized, its performance is very unstable. In order to maintain stable performance, it must be at the expense of small size. Therefore, the current TM-mode double-terminal short-circuit resonator is made of a single material, so that its volume is still large, its Q value is small, and its loss is large. In addition, in the current TM-mode double-terminal short-circuit resonant unit, the u...

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Problems solved by technology

Therefore, the current TM-mode double-terminal short-circuit resonator is made of a single material, so that its volume is still large, the Q value is small, and the loss is large

In addition, in the current TM-mode double-terminal short-circuit resonant unit, the upper end of the TM-mode resonator is a flat opening, and the gasket between it and the cover plate is also a flat plate, which inevitably leads to processing errors and thermal expansion after heating and cooling. Cold shrinkage is prone to short-circuit failure and electrical signal leakage.

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