Geometrically optimized anechoic chamber

Details Geometrically optimized anechoic chamber Geometrically optimized anechoic chamber

1995-06-30

1997-05-20

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Measuring signal energy

G01R 2908

Patent

active

056316615

ABSTRACT:
A radio frequency anechoic chamber utilizes an expanded central volume defined by two flared pyramidal horns with their outer rims joined together, with the flared sections tapering into rectangular cross-sectioned end volumes on opposite ends of the overall chamber. One end houses the transmitting or receiving antenna and the other end houses the items under test. The transitions between the flared and rectangular sections are configured to minimize diffraction effects and reflections which occur when an electromagnetic wave encounters an edge or surface discontinuity. By reducing reflections and diffraction a near-uniform wave arrives at the item under test, and the more uniform the illumination, the more accurate the results of the test.

REFERENCES:
patent: 3806943 (1974-04-01), Holloway
patent: 4218683 (1980-08-01), Hemming
patent: 4507660 (1985-03-01), Hemming
patent: 5001494 (1991-03-01), Dorman et al.
patent: 5119105 (1992-06-01), Ngai et al.
patent: 5270723 (1993-12-01), Lopez et al.
patent: 5430456 (1995-07-01), Osburn et al.
patent: 5440316 (1995-08-01), Podgorski et al.

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