Multi-band horn antenna using frequency selective surfaces

Details Multi-band horn antenna using frequency selective surfaces Multi-band horn antenna using frequency selective surfaces

2006-01-10

2006-01-10

Ho, Tan (Department: 2821)

Communications: radio wave antennas

Antennas

With polarization filter or converter

C343S771000, C343S786000, C343S909000, C333S137000

Reexamination Certificate

active

06985118

ABSTRACT:
A waveguide (100) including at least one outer surface (105, 110, 115, 120) defining a waveguide cavity (140) and at least one inner surface (130, 135) positioned within the waveguide cavity (140). The inner surface (130, 135) includes a frequency selective surface (FSS) having a plurality of FSS elements (145) coupled to at least one substrate. The substrate defines a first propagation medium such that an RF signal having a first wavelength in the first propagation medium can pass through the FSS (130, 135). The FSS (130, 135) is coupled to a second propagation medium such that in the second propagation medium the RF signal has a second wavelength which is at least twice as long as a physical distance between centers of adjacent FSS elements (145). The second wavelength can be different than the first wavelength.

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