Hologram observation method for three-dimensional wave source di

Details Hologram observation method for three-dimensional wave source di Hologram observation method for three-dimensional wave source di

1998-02-20

2000-10-31

Issing, Gregory C.

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

Directive

Including antenna pattern plotting

324 7626, 382210, 702 67, H01Q 300, G01R 1320, G06K 976, G06F 1700

Patent

active

06140960&

ABSTRACT:
A hologram observation method capable of accurately estimating a three-dimensional wave source distribution even when a wave source is close to a hologram observation plane. The hologram observation is performed according to a two-frequency hologram observation method to reconstruct a hologram image. A three-dimensional wave source position is obtained from the reconstructed hologram image, a virtual unit wave source is disposed at the obtained wave source position and an observed wave is synthesized. A hologram image obtained from the synthesized observed wave is reconstructed, and a wave source intensity obtained from the measured hologram image is divided by a wave source intensity at the hologram image obtained from the synthesized observed wave, thereby obtaining a true complex amplitude of the wave source. An area having an intensity more than a predetermined value in the hologram image which is obtained from the synthesized observation wave is excluded from a search range, and each of the foregoing steps is executed.

REFERENCES:
patent: 5656932 (1997-08-01), Kitayoshi
patent: 5689812 (1997-11-01), Takahashi
patent: 5748314 (1998-05-01), Kitayoshi
patent: 5752167 (1998-05-01), Kitayoshi
Kitayoshi, H. "Holographic Imaging of Electromagnetic Field Vector Flow", Antennas & Propagation Society Int'l Symp, AP-S Digest, vol. 3, 1994, p. 1636-1639.
Kitayoshi et al,"Holographic Imaging of Microwave Propagation", Microwave Symposium Digest, 1993, IEEE MTT-S Int'l, p. 241-244, vol. 1.

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