Lightweight cavity filter structure
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United States of America Patent
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Feb 7, 2017
Grant Date -
Sep 27, 2012
app pub date -
Mar 21, 2012
filing date -
Mar 22, 2011
priority date (Note) -
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Abstract
Embodiments provide a novel fabrication method and structure for reducing structural weight in radio frequency cavity filters and novel filter structure. The novel filter structure is fabricated by electroplating the required structure over a mold. The electrodeposited composite layer may be formed by several layers of metal or metal alloys with compensating thermal expansion coefficients. The first or the top layer is a high conductivity material or compound such as silver having a thickness of several times the skin-depth at the intended frequency of operation. The top layer provides the vital low loss performance and high Q-factor required for such filter structures while the subsequent compound layers provide the mechanical strength.
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