Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1993-09-07
1995-07-04
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
343915, 343DIG2, H01Q 1520, H04B 7185
Patent
active
054304512
ABSTRACT:
An array antenna mounted on a spacecraft in its stowed state. After the spacecraft is launched in a predetermined position or on a predetermined orbit, the array antenna is extended to a flat plate form or a curved surface form. The array antenna has a structure that a plurality of subarrays are connected by plate springs or the like. The array antenna is extended in a kite form by using cables for connecting a spacecraft body and the subarrays or is extended by using an extension pole mounted on the spacecraft body. Each subarray includes a variable phase shifter to switch a shape and a direction of a directivity beam. A feeder line, a power supply line, a control signal line and the like connect the spacecraft body and each subarray.
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patent: 4686533 (1987-08-01), MacDonald et al.
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patent: 5047788 (1991-09-01), Gillard
patent: 5200758 (1993-04-01), Gillard
patent: 5247309 (1993-09-01), Reich
Nemoto, et al "Japanese Eaerth Resources Satellite-1 Synthetic Aperture Radar" Proceedings of the IEEE Jun. 1991.
R. Raney, et al "Radarsat" Proceedings of the IEEE Jun. 1991.
Y. Hwang "Satellite Antennas" Proceedings of the IEEE Jan. 1992.
E. Ramos, et al "A Multiple Access Payload for Data Relay Applications Using Separate Transmit/Reaceive Active Arrays" May 1990.
Katagi Takashi
Kawanishi Toneo
Konishi Yoshihiko
Satoh Shin-ichi
Tamai Yasuo
Mitsubishi Denki & Kabushiki Kaisha
National Space Development Agency of Japan
Phan Dao L.
Tarcza Thomas H.
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