Communications: radio wave antennas – Antennas – Measuring signal energy
Patent
1992-10-08
1993-12-14
Hille, Rolf
Communications: radio wave antennas
Antennas
Measuring signal energy
343771, G01R 2910, H01Q 1310
Patent
active
052707237
ABSTRACT:
A field monitor in the near field receives an antenna signal which approximates that which would be received by the monitor if located in the far field. In one aspect of the invention, the antenna signal is produced by an array of spaced apart receiving elements. In another aspect of the invention, the signal received from a near field sampling antenna is passed through a signal processor having the necessary characteristics to construct from the sample a signal corresponding to that which would have been received in the far field. Antenna element arrays are also used as plane wave sources permitting antenna testing with a radiating path length of one-eighth or one-quarter of the far field distance. Compact indoor antenna test ranges are also provided.
REFERENCES:
patent: 3879733 (1975-04-01), Hansen et al.
patent: 4554551 (1985-11-01), Frazita
patent: 4704614 (1987-11-01), Poirier et al.
patent: 4864315 (1989-09-01), Mohuchy
patent: 4926186 (1990-05-01), Kelly et al.
patent: 5041840 (1991-08-01), Cipolla et al.
patent: 5119105 (1992-06-01), Ngai et al.
IEEE, Test Procedure for Antennas, IEEE No. 149, Jan. 1965, 32 pages.
Feldman Paul H.
Gencorelli Joseph B.
Lopez Alfred R.
Schay Gary
Brown Peter T.
Hazeltine Corporation
Hille Rolf
Onders E. A.
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