Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1983-09-15
1986-04-29
Blum, Theodore M.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343352, 343359, G01S 502, H04B 7185
Patent
active
045860505
ABSTRACT:
An automatic tracking system for an antenna device for satellite communications and using step tracking principles is disclosed which repeatedly effects tracking at predetermined intervals so that the receive electric field from the satellite becomes maximum. When a platform loaded with an antenna device for satellite communications is caused to sway to an inclined position during an interval between sequential tracking operations, sensors senses a pitching angle and a rolling angle of the platform. The outputs of the sensors are compared with an angle previously stored as an inclination angle of the platform which existed just before interval between sequential tracking operations. If the difference is larger than a predetermined value, step tracking is resumed to track the satellite even in a suspension period of step tracking.
REFERENCES:
patent: 4035805 (1977-07-01), Mobley
patent: 4334226 (1982-06-01), Eguchi et al.
Kuroda Takao
Shimizu Ryuji
Blum Theodore M.
Issing Gregory C.
NEC Corporation
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