METHOD FOR ESTIMATING STRENGTH OF WAVE FIELD

Japanese Patent JP3570571

B2

PURPOSE: To estimate the distribution of a wave field accurately by rearranging a first order wave source, reproduced from an interference data of wave, in a three- dimensional space and composing the wave at an arbitrary point thereby eliminating the measurement by means of a sensor at each point.
CONSTITUTION: A radiator 12 radiates radio waves having frequencies f1, f2, as a first order wave source, into an objective room 11. An observation plane 13 is located at a position where the radiator 12 and an electromagnetic field space to be estimated can be observed and the radio waves are received by a scan antenna 14 located at each point on the plane 13 and a fixed antenna 15. The received radio waves are processed and operated at a hologram operating section 35 to produce an interference data. The propagation delay time of a wave source image, reproduced using a two-dimensional interference data being measured, is then determined with respect to the wave radiated from the radiator 12 based on the phase of the wave source. Furthermore, each wave source is rearranged in a three-dimensional space using the reproduced wave source image, the propagation delay time, and the phase of a wave source observed at the frequency to be estimated. Waves are radiated again from the rearranged wave source and composed thus estimating the strength of wave field.

Hitoshi Kitayoshi

JP849695A

September 29, 2004

January 23, 1995

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Advantest Corporation

G01R29/08; G01H17/00; H04B7/00; (IPC1-7): G01R29/08; G01H17/00; H04B7/00

JP88846A

Taku Kusano
Minoru Inagaki

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