Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna orientation
Patent
1989-04-11
1992-02-18
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna orientation
342 75, 342442, 343765, H01Q 300
Patent
active
050898248
ABSTRACT:
Attitude control is implemented by detecting the phase difference between signals received by at least two antennas and detecting the angle of deflection between the direction of arrival of radio signals and the antenna beams. By using antennas that are separately driven, within the plane of rotation in which the deflection angle is to be detected, the phase of the received signals can be shifted equivalently to when the antennas are driven as a consolidated unit. Also, when at least three antennas are used in an orthogonal arrangement for detecting the deflection angle in two directions, the antennas are divided into two groups which are individually driven. This reduces the inertia of the moving parts and enables the size and weight of the drive mechanisms to be reduced.
In addition, two orthogonal functions are used to represent the phase of the deflection angle of the direction of arrival of the radio wave and the antenna beam as a multiplicity of quadrants, and by storing these, when there is a change in the deflection angle, the sequence of change can be traced back and the control effected accordingly. This enables error to be eliminated.
REFERENCES:
patent: 2480829 (1949-09-01), Barrow et al.
patent: 3025515 (1962-03-01), Fairbanks
patent: 3133283 (1964-05-01), Glose
patent: 3316548 (1967-04-01), D'Amico
patent: 4090201 (1978-05-01), Whitman, Jr.
patent: 4346386 (1982-08-01), Francis et al.
patent: 4638320 (1987-01-01), Eggert et al.
patent: 4725843 (1988-02-01), Suzuki et al.
Harakawa Tetsumi
Hiratsuka Ryuichi
Ito Yasuhiro
Kato Kazuro
Nemoto Isao
Hellner Mark
Nemoto Project Industry Co.
Nippon Steel Corporation
Nippoon Hoso Kyokai
LandOfFree
Antenna apparatus and attitude control method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antenna apparatus and attitude control method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna apparatus and attitude control method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1826433