Dielectric ceramics, dielectric fully filled filters and their applications
A dielectric ceramic and filter technology, applied in the field of microwave passive products, can solve problems such as the drop of the power threshold of the filter, and achieve the effect of ensuring the power threshold, closely fitting, and avoiding the air layer
Active Publication Date: 2021-07-09
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology
[0004] Satellites will experience a low pressure state from launch to orbit or from orbit to return. In the low pressure stage, the existing dielectric filter has an air layer between the upper surface and the cover plate, and the silver coating on the upper surface and the cover plate There is an electromagnetic field between them, resulting in a discharge phenomenon, resulting in a rapid drop in the filter power threshold
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[0045] Such as Figure 4 As shown, this embodiment provides a UHF frequency band dielectric fully-filled filter, including a housing 4 and a dielectric ceramic 1 located in the housing 4, wherein the dielectric ceramic 1 is a ceramic with a relative permittivity of 78±2 materials, and provided with three connecting holes 3 and 33 resonating holes 2, the dielectric ceramic 1 is a back-shaped block structure surrounded by four side walls with a height h of 20 mm, located on the left and right sides The thickness a of the side wall is 15.2 mm, the thickness b of the upper side wall is 15.2 mm, and the thickness e of the lower side wall is 3 mm. The 33 resonant holes 2 are distributed with the central axis of the dielectric ceramic 1 as a symmetrical axis, and 5 of them The resonant hole 2 is located on the upper side wall of the dielectric ceramic 1, and the other 18 resonant holes 2 are arranged in two rows on the walls of the left and right sides of the dielectric ceramic 1, on...
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Abstract
The invention provides a dielectric ceramic, a dielectric fully-filled filter and applications thereof, which belong to the field of microwave passive products. The dielectric ceramic is provided with a plurality of resonant holes and two connection holes, the plurality of resonant holes are arranged in parallel and all pass through the dielectric ceramic, the axes of the connection holes are perpendicular to the axes of the resonant holes, and the resonant holes The hole is a two-level stepped hole, and the large aperture section and the stepped surface are provided with silver plating, one of the connecting holes communicates with the large hole section of the resonant hole located at the first end of the dielectric ceramic, and the other said The connection hole communicates with the large hole section of the resonance hole located at the second end of the dielectric ceramic, and the connection hole is used for connecting with an external cable, and the outer surface of the dielectric ceramic is provided with silver plating. The dielectric ceramic and the outer casing can be closely bonded, avoiding the existence of an air layer caused by incomplete silver plating on the outer wall, and ensuring a stable filter power threshold.
Description
technical field [0001] The invention relates to the field of microwave passive products, and in particular provides a dielectric ceramic, a dielectric fully-filled filter and applications thereof. Background technique [0002] With the continuous development of satellite measurement, control and tracking technology, the requirements for UHF frequency band spaceborne passive devices are getting higher and higher, especially in terms of miniaturization, light weight, high reliability and anti-low pressure discharge capability. At present, the conventional cavity filter can no longer meet the requirements due to factors such as large size, heavy mass and limited power. The dielectric filter has the characteristics of small size, light weight and large power capacity, and meets the development trend of satellite measurement, control and tracking technology. [0003] Existing dielectric filters generally include a housing and dielectric ceramics located in the housing. The dielec...
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IPC IPC(8): H01P1/20
CPCH01P1/2002
Inventor 殷新社刘军董坤坤倪玉荣张祎煊李丹樊田冯宇宁
Owner XIAN INSTITUE OF SPACE RADIO TECH