Broadband isotropic probe system for simultaneous measurement of

Details Broadband isotropic probe system for simultaneous measurement of Broadband isotropic probe system for simultaneous measurement of

1983-05-19

1986-05-13

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343703, 324158P, 324 725, G01S 302, G01R 3102

Patent

active

045889937

ABSTRACT:
A broadband isotropic probe system simultaneously measuring the E- and H-field intensities of rf complex, near-field electromagnetic radiation comprises a set of three mutually orthogonal dipole antennas and a set of three mutually orthogonal loop antennas located within the same volume of space. Each antenna has associated circuitry comprising a frequency-response-shaping filter and diode detector to provide a frequency response which is flat over the desired frequency bandwidth. The lengths of the dipoles are kept electrically small so that the EM fields are not perturbed. The diameters of the loops are kept electrically small so that the E-field pickup will be negligible. Coupling between any of the probe's antennas is also minimized by the use of electrically small antennas. Circuit means based on the use of square law detectors is also provided, the circuit including an arrangement of analog or digital data processing portions leading into a display means and a data recorder.

REFERENCES:
patent: 2256619 (1941-09-01), Luck
patent: 3631500 (1971-12-01), Itoh
patent: 3691561 (1972-09-01), Jager
patent: 3718932 (1973-02-01), Ikrath et al.
patent: 3947770 (1976-03-01), Cavanagh et al.
patent: 4023093 (1977-05-01), Aslan
1975 IEEE Electromagnetic Compatability Symposium Record, EMC the Old and the New,-"Superwideband Electric Field Probes"-Babij.

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