Antenna for sensing stray RF radiation

Details Antenna for sensing stray RF radiation Antenna for sensing stray RF radiation

1991-06-12

1992-12-01

Hille, Rolf

Communications: radio wave antennas

Antennas

Measuring signal energy

343793, 343823, 343872, 324 95, G01R 2980, H01Q 9140, H01Q 9220, H01Q 1400

Patent

active

051682796

ABSTRACT:
An antenna for sensing stray RF radiation, such as from electronic equipment, is positioned within a dielectric enclosure. For the case of a dipole sensing antenna, the enclosure may take the form of a clear acrylic (i.e., Plexiglas) tube. This tube assures that no part of the equipment-under-test can be positioned nearer to the dipole antenna than the desired distance (which is fixed by the radius of the tube). The dipole elements themselves may be maintained coaxially disposed within the tube by spacer disks. If the dipole elements are telescopic, their lengths can readily be set by attaching the spacer disks to the outer-most telescoping member of each element and moving the spacer disks (and in so doing moving the ends of the dipole elements) into alignment with markings disposed on the tube. These markings may be calibrated either in terms of distance or the corresponding resonant frequency.

REFERENCES:
patent: 2563243 (1951-08-01), Hills
patent: 3030622 (1962-04-01), Leitner et al.
patent: 3056925 (1962-10-01), Borck et al.
patent: 3335420 (1967-08-01), Silliman
patent: 3961332 (1976-06-01), Middlemark
Kraus, Antennas, Excerpt from Chapter 1, McGraw-Hill, 1950, pp.8-10.
HP 8554A Synthesized Signal Generator, Hewlett-Packard brochure, Oct. 1990, pp.1-8.

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