Communications: radio wave antennas – Antennas – Slot type
Reexamination Certificate
2005-03-29
2005-03-29
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
Slot type
C343S754000, C342S376000
Reexamination Certificate
active
06873301
ABSTRACT:
An antenna system, to enable communication with a moving vehicle via a satellite, utilizes an array of subarrays contiguously positioned in a diamond-type pattern. Straight edge boundaries of an array can maximize sidelobe degradation resulting from diffraction effects at the edge. The diamond-type array pattern provides saw tooth array edge boundaries with all edge portions at 45 degrees (or other suitable acute angle) to the principal array dimension (the length dimension). Uniform excitation may be provided for all subarrays via a binomial power divider/combiner configuration. Mechanical beam steering can be provided in azimuth and elevation. A phase shifter assembly may be provided to enable a limited electronic scan (e.g., plus or minus 2 degrees) to increase beam steering agility from a moving vehicle. Thin flat-plate subarray design details are provided.
REFERENCES:
patent: 5420598 (1995-05-01), Uematsu et al.
patent: 5579019 (1996-11-01), Uematsu et al.
patent: 6259415 (2001-07-01), Kumpfbeck et al.
patent: 6426814 (2002-07-01), Berger et al.
patent: 6677899 (2004-01-01), Lee et al.
BAE Systems Information and Electronic Systems Integration Inc.
Robinson Kenneth P.
Vu Jimmy
Wong Don
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