Phase control of transmission antennas

Details Phase control of transmission antennas Phase control of transmission antennas

1997-09-05

2000-04-04

Hellner, Mark

Communications: directive radio wave systems and devices (e.g.,

Directive

Including antenna pattern plotting

342174, G01S 1300, H01Q 0300

Patent

active

060466979

ABSTRACT:
A phase array antenna is monitored by applying to each element of the array in turn a signal known characteristics, detecting the signal output from the selected element as a result of the applied known signal, and comparing the detected signal with the applied signal whereby to monitor changes in the applied signal due to the signal path. The detection is preferably carried out using a single monitoring unit in the near-field of each antenna element. Alternatively the detection is carried out using a single source of applied signals a number of individual monitoring units one for each element of the array, and a switching device for selecting the element of the array to be monitored.

REFERENCES:
patent: 4176354 (1979-11-01), Hsiao et al.
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patent: 4949090 (1990-08-01), Tamii et al.
patent: 5038146 (1991-08-01), Troychak et al.
patent: 5072228 (1991-12-01), Kuwahara
patent: 5187486 (1993-02-01), Kolzer
patent: 5530449 (1996-06-01), Wachs et al.
patent: 5644316 (1997-07-01), Lewis et al.
patent: 5771019 (1998-06-01), Wachs et al.

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