Title :
Analysis and design of 4-wire antenna for anechoic chamber excitation
Author :
Liepa, Valdis V. ; Cheon, Changyul
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
In order to illuminate a uniform field at a target area in an anechoic chamber over a wide frequency range, a 4-wire antenna is proposed. This antenna consists of two V-antennas spreading away from each other from the feed point. Antenna parameters are determined for a given dimension of the anechoic chamber. Numerical analysis shows that the 4-wire antenna has broadband characteristics from 100 MHz to over 1 GHz when a proper resistance tapper is applied at the ends of wires. The maximum upper frequency limit has not yet been determined. The field distribution illuminated by the antenna in the 4-foot-diameter sphere target area is uniform within +or-0.5 dB for optical geometry and +or-1 dB for symmetrical geometry of the antenna.<>
Keywords :
anechoic chambers; antennas; 100 MHz to 1 GHz; 4-foot-diameter sphere target area; 4-wire antenna; UHF; V-antennas; VHF; anechoic chamber excitation; antenna parameters; broadband characteristics; design; optical geometry; resistance tapper; symmetrical geometry; uniform field illumination; wide frequency range; Anechoic chambers; Antenna feeds; Broadband antennas; Current distribution; Electric resistance; Frequency; Geometry; Impedance; Numerical analysis; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134686
