Method and apparatus for performing planar near-field antenna me

Details Method and apparatus for performing planar near-field antenna me Method and apparatus for performing planar near-field antenna me

1992-06-24

1994-11-15

Hajec, Donald

Communications: radio wave antennas

Antennas

Measuring signal energy

455 671, G01R 2910

Patent

active

053652410

ABSTRACT:
A planar near-field antenna measurement and diagnostic system is described which collects data on a bi-polar grid. The planar scanning is accomplished using rotary positioners and a mechanical arm. The test antenna is mounted to a rotary positioner such that it can spin about its axis. The arm is mounted to another rotary positioner such that it can rotate about a second axis. A field probe, attached to the end of the arm, scribes an are which passes through the antenna rotation axis. By rotating the two positioners, the near-field of the antenna can be measured on a bi-polar sampling grid comprising concentric circles and radial arcs. The mechanical simplicity afforded by rotational motion rather than the linear motion of most planar near-field scanners provides for an elegant and cost-effective design.

REFERENCES:
patent: 4201987 (1980-05-01), Tricoles et al.
patent: 5119105 (1992-06-01), Ngai et al.

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