Electrically thin multi-layer bandpass radome
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United States of America Patent
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Nov 5, 2002
Grant Date -
N/A
app pub date -
Jun 14, 2001
filing date -
Jun 14, 2001
priority date (Note) -
Expired
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Abstract
A bandpass radome that reduces the number of spurious resonances, and that tends to suppress Transverse Magnetic TM and Transverse Electric TE surface waves, is described. In one embodiment, the radome includes an inductive FSS ground plane layer. First and second capacitive FSS layers are disposed above the inductive ground plane layer. Third and fourth capacitive FSS layers are disposed below the inductive ground plane layer. In one embodiment, the capacitive FSS layers use patch elements and some or all of the FSS patch elements above and below the inductive ground plane layer are electrically connected to the inductive ground plane layer by a conducting posts. The conducting posts form a rodded medium to suppress TM and TE surface waves. In one embodiment the total thickness of the bandpass radome is less than .lambda./20 at the center frequency of the passband.
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