A broadband E-field sensor

Author

Thansandote, A. ; Stuchly, S.S. ; Stuchly, M.A. ; Barski, M.

Author_Institution

Dept. of Electr. Eng., Ottawa Univ., Ont., Canada

fYear

1990

fDate

11-14 June 1990

Firstpage

410

Lastpage

411

Abstract

A broadband (10-kHz-350-MHz) E-field sensor based on an electrically small antenna for measurements of transient fields has been developed. The antenna is coupled to a receiver using a wideband buffer amplifier. The sensitivity of the sensor depends on the size of the antenna, while the broadband performance is determined by the size of the antenna, the input impedance of the amplifier, and the coupling between the two devices. The sensor is calibrated in a TEM (transverse electromagnetic) cell using CW (continuous-wave) and pulsed fields. Results of an analysis and calibration of the sensor are presented. For a sphere of 9.6-cm diameter coupled with a 1-M Omega microprobe, the sensor provides a flat response with sensitivity of 1 mV/(V/m) from 10 kHz to 350 MHz. The risetime of the output pulse is less than 500 ps. The dynamic range of the sensor is expected to be on the order of 80 dB.<>

Keywords

antennas; calibration; electric field measurement; electric sensing devices; 1 Mohm; 10 kHz to 350 MHz; 500 ps; 9.6 cm; CW fields; TEM; analysis; broadband E-field sensor; calibration; coupling; dynamic range; electric field measurement; electrically small antenna; flat response; input impedance; measurements of transient fields; pulsed fields; sensitivity; size; wideband buffer amplifier; Antenna measurements; Broadband amplifiers; Broadband antennas; Calibration; EMP radiation effects; Electric variables measurement; Electromagnetic fields; Impedance; Pulse amplifiers; Receiving antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.110082

Filename

110082