Title :
A dual-band cavity-backed single arm square spiral slot antenna
Author :
Shi, Song ; Hirasawa, Kazuhiro ; Chen, Zhi Ning
Author_Institution :
Inst. of Inf. Sci. & Electron., Tsukuba Univ., Ibaraki, Japan
fDate :
6/21/1905 12:00:00 AM
Abstract :
A dual-band cavity-backed single arm square spiral slot antenna is presented and investigated by using the generalized network formulation based on the equivalence principle. By applying the method of moments, the magnetic current including the effect of the cavity is obtained for a thin single arm square spiral slot. The feed point is set at the outer turn of the single arm square spiral slot to get a dual band operation. The VSWR bandwidths (≤2) of 5.0% and 5.8% have been obtained for the low and high band resonances, respectively. The way of increasing the VSWR bandwidth has been discussed.
Keywords :
method of moments; multifrequency antennas; slot antennas; spiral antennas; VSWR bandwidths; antenna structure; cavity effect; dual band operation; dual-band cavity-backed spiral slot antenna; equivalence principle; high band resonances; magnetic current; method of moments; network formulation; rectangular cavity; single arm square spiral slot antenna; Bandwidth; Dual band; Feeds; Frequency; Magnetic separation; Moment methods; Resonance; Satellite antennas; Slot antennas; Spirals;
Conference_Titel :
Computational Electromagnetics and Its Applications, 1999. Proceedings. (ICCEA '99) 1999 International Conference on
Print_ISBN :
0-7803-5802-3
DOI :
10.1109/ICCEA.1999.825102
