Title :
Characteristics of the wire biconical antenna used for EMC measurements
Author :
Austin, Brian A. ; Fourie, Andre P C
Author_Institution :
Dept. of Electr. Eng. & Electron., Liverpool Univ., UK
fDate :
8/1/1991 12:00:00 AM
Abstract :
The characteristics of a wire biconical antenna that determine its antenna factor were computed by using the method of moments code NEC-2. A fairly extensive validation exercise was conducted from which a suitable computer model was derived. The input impedance, gain, and radiation patterns of the antenna were computed for special cases where the biconical antenna is used above a conducting ground plane for open-field EMC (electromagnetic compatibility) testing. The effects of height above the ground plane and polarization of the antenna on these parameters were found and the antenna factor was corrected for them. The current distribution along the antenna elements was also examined, and it was found that significant pattern distortion can occur at some frequencies when a horizontal wire biconical antenna is used close to the ground. These results will allow this broadband antenna to be used with confidence in applications where previously only resonant dipoles were specified
Keywords :
amplification; antenna radiation patterns; antennas; computer aided analysis; electric impedance; electrical engineering computing; electromagnetic compatibility; wires (electric); EMC measurements; EMI; NEC-2 method of moments code; antenna elements; antenna factor; broadband antenna; computer model; conducting ground plane; current distribution; gain; height; input impedance; open field EMC testing; pattern distortion; polarization; radiated emission measurement; radiation patterns; wire biconical antenna; Antenna radiation patterns; Broadband antennas; Current distribution; Dipole antennas; Electromagnetic compatibility; Electromagnetic wave polarization; Impedance; Moment methods; Testing; Wire;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
