Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With waveguide or long line
Patent
1992-02-12
1993-07-27
Snow, Walter E.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With waveguide or long line
324 72, G01R 3102, G01R 2304, G01R 2502, G01R 2702
Patent
active
052313468
ABSTRACT:
A field strength measuring instrument for simultaneously measuring E and H fields is described. A loop antenna is formed by a half-loop (1) which is terminated by a metal surface (2). Due to the mirror effect of the metal surface (2), this arrangement, in field theory, is equivalent to a loop antenna which is divided into a first and a second half-loop (1, 5) by two load resistors (4a, 4b) arranged at opposite ends of the loop antenna. A circuit (8) for determining the field strengths of the E and H fields by means of the voltages (V.sub.1, V.sub.2) measured across the load resistors (4a, 4b) is arranged in a part-space shielded from the first half-loop (1) by the metal surface (2).
REFERENCES:
patent: 2785396 (1957-03-01), Carter
patent: 4277744 (1981-07-01), Audone et al.
patent: 4328461 (1982-05-01), Butters et al.
IEEE Transaction On Electromagnetic Compatibility, vol. EMC-26, No. 3, Aug. 1984, pp. 102-110, M. Kanda, "An Electromagnetic Near-Field Sensor for Simultaneous Electric and Magnetic-Field Measurements".
Fifth IEEE Pulsed Power Conference, Arlington, VA, Jun. 10-12, 1985, pp. 381-384, A. Kuchler, et al., "Combined E-and H-Field Probe for Traveling Wave Analysis in Pulse Power Generators".
IEEE Transaction On Instrumentation And Measurements, vol. IM-32, No. 4, Dec. 1983, pp. 466-468, K. Munter, "An Isolated Sensor Determining the Poynting Vector in the Near Field of a Radiating Antenna".
Asea Brown Boveri Ltd.
Snow Walter E.
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