Self temperature compensation round waveguide TE011 mode resonant cavity

Abstract

The invention discloses a self temperature compensation round waveguide TE011 mode resonant cavity which can obviously decrease the influence of the temperature on the resonant frequency of the resonant cavity. In the resonant cavity, a metal cavity (1) is a hollow cylinder; a short-circuit board (2) is arranged in the metal cavity (1); the short-circuit board (2) is connected with an upper bottom cavity wall (5) of the metal cavity (1) by a support (3); the coefficient of thermal expansion of the support (3) is more than the coefficient of thermal expansion of the metal cavity (1); one end of the support (3) is fixed on the upper bottom cavity wall (5) of the metal cavity (1) while the other end is fixed on the short-circuit board (2); the short-circuit board (2) is of a round disc shapeand is slightly smaller than the upper bottom cavity wall (5); the short-circuit board (2), an upper bottom cavity wall (6) of the metal cavity (1) and a side wall (7) of the metal cavity (1) form anelectromagnetic wave resonance space (8); and an input output coupling device (4) is arranged on the side wall (7) or the upper bottom cavity wall (6) of the metal cavity (1) of the electromagnetic wave resonance space (8).

Description

technical field [0001] The invention relates to a waveguide resonant cavity, in particular to a self-temperature-compensated circular waveguide TE capable of reducing the temperature drift of the resonant frequency 011 modulus (also known as H 011 mode, which is a resonant mode in the circular waveguide resonator) resonator. Background technique [0002] The resonant frequency of the resonant cavity depends on the shape, size, cavity filling medium and resonant mode of the resonant cavity. When the temperature changes, the size of the resonant cavity will also change due to thermal expansion and contraction of the wall material of the resonant cavity, which will cause a change in the resonant frequency of the resonant cavity, which will adversely affect the performance of the resonant cavity. At present, the known methods for reducing the influence of temperature changes on the resonant frequency of the resonator are mainly to adopt constant temperature measures, or use ad...

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Problems solved by technology

The main problems of these methods are: the required equipment is complex, or additional temperature compensation control devices are required, or the influence of temperature on the resonant frequency of the resonant cavity cannot be greatly reduced

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