Hole coupling and tuning device for utilizing sliding piston to conduct tuning

Abstract

The invention discloses a hole coupling and tuning device for utilizing a sliding piston to conduct tuning. The device comprises a coupling hole 1, a waveguide 2, a coaxial wire-waveguide converter 3 and the sliding piston 4. The coupling hole 1 is formed in one end of the waveguide 2, the sliding piston 4 is arranged at the other end, the sliding piston 4 forms the short circuit face of the waveguide 2, the position of the short circuit face in the waveguide 2 is adjusted by moving the sliding piston 4, the coaxial wire-waveguide converter 3 is arranged on the waveguide wall of the waveguide 2, and the coaxial wire-waveguide converter 3 is located between the coupling hole 1 and the sliding piston 4 at the horizontal position. The coupling size of the hole can be changed through the sliding piston tuning. The tuning device is simple in structure, high in structure consistency and reliability and good in strength stability, solves the problem that the conventional hole coupling is impure in mode and low in reliability, and can be conveniently applied to a resonant cavity requiring accurate adjustment of a coupling coefficient, especially the resonant cavity with more than one coupling coefficient required to be accurately adjusted.

Description

technical field [0001] The invention belongs to the field of microwave technology, in particular to a hole coupling tuning device for adjusting the coupling coefficient of a resonant cavity by sliding a piston. Background technique [0002] Accurately realizing the required coupling degree is very important for the application of microwave resonators. In high-power applications of resonators, in order to protect the signal source and improve power transmission efficiency, the return loss is required to be large, so the resonator needs to work in a critical coupling state. to get as little power reflection as possible. In the design of low phase noise oscillator based on carrier suppressed resonant cavity, in order to suppress the carrier to the greatest extent and meet the oscillation conditions, to achieve low phase noise and point frequency output with a certain power level, the input end of the resonant cavity needs to be obtained at a certain A given weak critical coupl...

AI Technical Summary

Problems solved by technology

However, due to the existence of machining errors, the actual coupling hole size is often inconsistent with the design size, resulting in the actual coupling degree is not the simulation design value

Once the coupling hole is processed and formed, the size cannot be changed arbitrarily, and the coupling degree needs to be adjusted by adding metal pins, and high-order modes are easily generated near the pins, causing impurity in the excitation mode, and sparking is prone to occur in high-power applications

At present, there is no simple method and device that can accurately adjust the coupling coefficient of the resonator

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