Polarization independent frequency selective surface for diplexi

Details Polarization independent frequency selective surface for diplexi Polarization independent frequency selective surface for diplexi

1990-10-23

1992-11-10

Hille, Rolf

Communications: radio wave antennas

Antennas

Antenna components

343753, H01Q 1502

Patent

active

051628090

ABSTRACT:
A frequency selective surface suitable for separating two closely adjacent frequency band microwave signals. The frequency selective surface comprises a symmetrical array of discreet open center outer conductor elements and an open center conductor element centered in spaced relationship within each of the outer conductor elements. Both square loop and circular loop conductor elements may be employed. The spacing between corresponding parts of the conductor elements is periodic. The spacing between adjacent edges of the outer conductor elements and the spacing between adjacent edges of the outer and inner conductor elements are maintained within predetermined ratios of the wavelength of a microwave signal to be reflected by the surface providing a frequency selective surface in which the ratio of transmitted microwave signals to the frequency of reflected microwave signals is 1.15.

REFERENCES:
patent: 3148370 (1964-09-01), Bowman
patent: 4125841 (1978-11-01), Munk
patent: 4656487 (1987-04-01), Sureau et al.
patent: 4684954 (1987-08-01), Sureau et al.
patent: 4785310 (1988-11-01), Rosen
patent: 4814785 (1989-03-01), Wu
Langly et al., "Double Square Frequency Selective Surfaces and Their Equivalent Circuit", Electronics Letters, Aug. 18, 1983, vol. 19, No. 17.

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