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Disc-shaped tuning capacitor for high frequency screened tube - uses dielectric with large loss angle and radius uneven multiple of dominant quarter wavelength
Disc-shaped tuning capacitor for high frequency screened tube - uses dielectric with large loss angle and radius uneven multiple of dominant quarter wavelength
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机译：用于高频屏蔽管的盘形调谐电容器-使用介电损耗角大且半径不均匀的四分之一波长的倍数的介质
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摘要
The tuning capacitor is disc shaped and has a high frequency screened tube for fitting through the walls of a waveguide. There is a disc shaped dielectric material with a large loss angle at the entry of one end of the tube through the wall of the waveguide. There is a second smooth surface capacitor lining at the other end of the tube, with a conducting lead connected to the centre. The size of the radius of the disc shaped capacitor element (31, 32) is chosen to be an uneven multiple of a quarter wavelength of the dominant mode in the waveguide (11). The thickness of the dielectric (31) is smaller than the diameter of the tube at the entry through the waveguide wall (23). The dielectric disc is made with a recess for aligning with the centre of the waveguide.
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