DocumentCode :
583848
Title :
Frequency control of multi-band ring microstrip antennas with variable reactance circuits
Author :
Sato, Shuhei ; Saito, Sakuyoshi ; Kimura, Yuichi
Author_Institution :
Dept. of Electr. & Electron. Syst., Saitama Univ., Saitama, Japan
fYear :
2012
fDate :
Oct. 29 2012-Nov. 2 2012
Firstpage :
810
Lastpage :
813
Abstract :
Multiband or wideband antennas are desired for various wireless applications such as mobile communication systems and car electronics. In accordance with these trends, multiband planar antennas with multi-ring microstrip antennas (MR-MSAs) have been developed [1], [2]. The MR-MSAs consist of multiple ring patches arranged concentrically on a double-layered dielectric substrate and an L-probe in the middle layer for feeding. The MR-MSAs exhibit excellent multiband performances and design flexibility because operating frequencies as well as its polarization (LP or CP) are specified very freely. One of disadvantages of the MR-MSA is narrow band width of each operating frequency. On the other hand, frequency-tuneable MSAs with varactor diodes [3], [4] or with variable reactance circuits [5], [6] are reported.
Keywords :
broadband antennas; frequency control; microstrip antennas; multifrequency antennas; planar antennas; varactors; L-probe; MR-MSA; car electronics; double-layered dielectric substrate; frequency control; mobile communication systems; multiband planar antennas; multiband ring microstrip antennas; multiring microstrip antennas; ring patches; varactor diodes; variable reactance circuits; wideband antennas; Dual band; Frequency control; Gain; Microstrip; Microstrip antennas; Planar arrays; Resonant frequency;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation (ISAP), 2012 International Symposium on
Conference_Location :
Nagoys
Print_ISBN :
978-1-4673-1001-7
Type :
conf
Filename :
6393719
Link To Document :
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