Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Reexamination Certificate
2008-01-04
2010-02-02
Issing, Gregory C (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
C342S375000
Reexamination Certificate
active
07656351
ABSTRACT:
A method for electronically scanning a predetermined geostationary orbital arc segment around the earth with an antenna system. The antenna system includes a planar array. A number of fixed electronic squints is selected. Lengths of the total plurality of fixed delay line lengths are generated for the planar array based on the number of fixed electronic squints. All of the antenna elements in the planar array for the mobile earth station are fitted with the generated lengths. The orbital arc segment is electronically scanned with a single linear scan with the planar array. This method is extendable to the case of multiple beams by adding additional phase shifters at each column and keeping the number of fixed line lengths the same, regardless of the number of additional beams.
REFERENCES:
patent: 4458247 (1984-07-01), Amitay
Amitay et al, ‘Narrow Multibeam Satellite Ground Station Antenna Employing a Linear Array with a Geosynchronous Arc Coverage of 60—Part I:Theory,’ IEEE Trans on Antennas and Propagation, vol. AP-30 No. 6, Nov. 1982, pp. 1063-1067.
Gans et al, ‘Narrow Multibeam Satellite Ground Station Antenna Employing a Linear Array with a Geosynchronous Arc Coverage of 60—Part II: Antenna Design,’ IEEE Trans on Antennas and Propagation, vol. AP-31 No. 6, Nov. 1983, pp. 966-972.
Amitay. N and Gans, M. G., “Narrow Multibeam Satellite Ground Station Antenna Employing a Linear Array With a Geosynchronous Are Coverage of 60 - - - Part I:Theory”, IEEE Transactions on Antennas and Propagation, vol. AP-30, No. 6, Nov. 1982.
Gans, M.G. and Amitay, N., “Narrow Multibeam Satellite Ground Station Antenna Employing a Linear Array With a Geosynchronous are Coverage of 60, PartII: Antenna Design”, IEE Transactions on Antennas and Propagation, vol. AP-31, No. 6., Nov. 1983.
Mital Rashmi
Parent Mark G.
Patel Dharmesh P.
Rao Jaganmohan B. L.
Tavik Gregory C.
Issing Gregory C
Karasek John J.
Koshy Suresh
The United States of America as represented by the Secretary of
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