Resistive taper for dense packed feeds for cellular spot...

Details Resistive taper for dense packed feeds for cellular spot... Resistive taper for dense packed feeds for cellular spot...

H - Electricity

01

Q

H01Q 19/17 (2006.01) H01Q 15/14 (2006.01) H01Q 19/02 (2006.01) H01Q 25/00 (2006.01) H04B 7/185 (2006.01)

Patent

CA 2311010

Providing a tapered surface reflectivity to the reflecting surface of the parabolic reflector in a parabolic antenna using resistive material reduces side lobes and produces steeper roll off~in the principal lobe, permitting use in the antenna of a smaller diameter microwave feed than required by an antenna without that tapered surface resistivity and, effectively, emulates the latter antenna. As a consequence of the smaller feed diameter, multiple feeds may be positioned contiguously to form multi-beam antennas that produce contiguous beam patterns. A satellite cellular communications multi-beam antenna incorporating the invention achieves greater regional coverage of the Earth.

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