Method and apparatus for producing wide null antenna patterns

Details Method and apparatus for producing wide null antenna patterns Method and apparatus for producing wide null antenna patterns

1997-11-03

2000-05-09

Issing, Gregory C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

342373, 342378, H04R 7185, H01Q 322

Patent

active

060610239

ABSTRACT:
An enhanced digital beamformer (EDBF) (210, FIG. 2) is provided for use in a transceiver subsystem (200, FIG. 2) for mitigating interference and increasing the frequency reuse factor in communication systems. The EDBF is used to produce wide nulls (520, FIG. 5) in at least one steerable antenna beam pattern. By directing wide nulls at undesired signals, the EDBF provides a more efficient processing of antenna beam patterns in communication systems. The EDBF is used in geostationary satellites, non-geostationary satellites, and terrestrial communication devices. The EDBF combines a unique algorithm, a special processor, and an array antenna to significantly improve the capacity of current and future communication systems, while remaining compatible with existing modulation techniques.

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