Communications: radio wave antennas – Antennas – Antenna components
Patent
1997-04-29
1999-09-07
Kim, Robert H.
Communications: radio wave antennas
Antennas
Antenna components
343754, 343753, 343781, 343907, H01Q 1523, H01Q 1514, H01Q 1502
Patent
active
059493879
ABSTRACT:
A frequency selective surface filter (20 or 50) particularly useful in connection with a transmit antenna (10) for passing and rejecting signals in multiple frequency bands. According to one embodiment, the frequency selective surface filter (20) has a single conductive screen (24) disposed on a dielectric medium (22). The single-conductive screen (24) includes an array of parallel intersecting lines (26) and (28) providing low frequency filtering. The single-conductive screen (24) also includes an array of double-loop conductive elements each made up of an inner conductive loop (32) and an outer conductive loop (30). According to a second embodiment, the frequency selective surface filter (50) contains two dielectrically separated conductive layers including a first conductive layer (52) having an array of double-slots made up of an inner slot (64) and an outer slot (66). The double-slot configuration further includes a second conductive layer (60) made up of an array of single conductive loops (62).
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Bever Mark E.
Macek John J.
Wu Te-Kao
Kim Robert H.
Lauchman Layla G.
TRW Inc.
Yatsko Michael S.
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