Communications: radio wave antennas – Antennas – Antenna components
Patent
1991-08-05
1992-08-18
Lee, John D.
Communications: radio wave antennas
Antennas
Antenna components
343700MS, 343789, H21Q 1502, H21Q 1524
Patent
active
051403382
ABSTRACT:
A freqency selective surface for passing electromagnetic wave energy and the selected frequency band is described. The device includes a conductive apertured substrate having apertures formed therein which are sized and arranged in a predetermined patern. The apertures each form a waveguide segment for electromagnetic energy. In one embodiment dielectric loading material is moldably formed directly into the apertures. In a bipolar arrangement, conductive patches are located on opposite sides of the dielectric coaxially with each waveguide for establishing a capacitive load in accordance with the area of the patches. Dielectric matching material on opposite surfaces of the substrate is employed to match the surface with external media for efficient electromagnetic wave propagation. Other arrangements employ notched patches and air dielectrics.
REFERENCES:
patent: 4170013 (1979-10-01), Black
patent: 4443802 (1984-04-01), Mayes
patent: 4623893 (1986-11-01), Sabban
Bingham James A.
Lucas Eric W.
Schmier Robert G.
Lee John D.
Sutcliff W. G.
Westinghouse Electric Corp.
Wise Robert E.
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