Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1985-11-06
1987-11-03
LaRoche, Eugene R.
Communications: radio wave antennas
Antennas
Measuring signal energy
324 95, 340600, G01R 2908
Patent
active
047046147
ABSTRACT:
Apparatus for measuring the near-field radiation of an antenna such that its far-field radiation characteristics can be determined. The invention utilizes the principle of the Foucault pendulum. It uses a bob attached to a long pendulum arm that is free to rotate. Rotation of the earth causes an apparent rotation of the swing plane of the pendulum with a period of T=24/sin (latitude). By attaching a field sensing probe to the pendulum bob and mounting the antenna under the Foucault pendulum, the entire antenna aperture can be scanned without moving the antenna. The motion of the probe covers part of an external sphere centered at the pivot point of the pendulum and having a radius equal to the length of the pendulum. Appropriate transformation of the measured near-field data gives the far-field radiation pattern.
REFERENCES:
patent: 3641439 (1972-02-01), Asian
patent: 3787866 (1974-01-01), Gamertsfelder et al.
patent: 3879733 (1975-04-01), Hansen et al.
patent: 3932745 (1976-01-01), Hartman
patent: 4070621 (1978-01-01), Bassen et al.
patent: 4201987 (1980-05-01), Tricoles et al.
Paris et al., "Basic Theory . . . Measurements", IEEE Trans. on Antenna and Propagation, vol. AP-26, No. 3, May, 1978, pp. 373-379.
"Applications of Probe-Compensated Near-Field Measurement," D. T. Paris et al., IEEE Tran. A. P., vol. 33, pp. 379-389.
Poirier J. Leon
Yaghjian Arthur D.
Donahue Richard J.
Ham Seung
LaRoche Eugene R.
Singer Donald J.
The United States of America as represented by the Secretary of
LandOfFree
Apparatus for scanning and measuring the near-field radiation of does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for scanning and measuring the near-field radiation of, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for scanning and measuring the near-field radiation of will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1676213