Self temperature compensation circular waveguide resonant cavity

Abstract

The invention discloses a self temperature compensation circular waveguide resonant cavity, which relates to a waveguide resonant cavity and can remarkably reduce the influence of temperature on the resonant frequency of the resonant cavity. In the resonant cavity, a short-circuit cylinder (2) consists of a circular bottom surface (5) and a columnar cylinder wall (6), the bottom surface (5) of the short-circuit cylinder (2) is connected with one bottom surface cavity wall (7) of a metal cavity (1) through a support body (3), the thermal expansion coefficient of the support body (3) is greater than that of the metal cavity (1), and the outside diameter of the short-circuit cylinder (2) is slightly smaller than the inside diameter of a side wall (8) of the metal cavity (1); the bottom surface (5) of the short-circuit cylinder (2), the other bottom surface cavity wall (9) of the metal cavity (1) and the side wall (8) of the metal cavity form a resonant space (10) of electromagnetic wave; and an input / output coupling device (4) is positioned on the side wall (8) or the bottom surface cavity wall (9) of the metal cavity (1) in the resonant space (10).

Description

technical field [0001] The patent of the present invention relates to a waveguide resonator, in particular to a self-temperature-compensated circular waveguide resonator capable of reducing the temperature drift of the resonant frequency. Background technique [0002] The resonant frequency of the resonator depends on the shape, size, filling medium and resonant mode of the resonator. When the temperature changes, due to the thermal expansion and contraction effect of the cavity wall material, the size of the resonant cavity will also change, resulting in a change in the resonant frequency of the resonant cavity, which adversely affects the performance of the resonant cavity. At present, the known methods to reduce the effect of temperature change on the resonant frequency of the resonator are mainly to use constant temperature measures, or to use additional temperature compensation devices, or to use cavity materials with small thermal expansion coefficients such as invar a...

AI Technical Summary

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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