Title :
Circularly polarized spiral antenna using a double negative property
Author :
Nakano, H. ; Miyake, J. ; Oyama, M. ; Oishi, Y. ; Sakurada, T. ; Yamauchi, J.
Author_Institution :
Grad. Sch. of Eng., Hosei Univ., Koganei, Japan
Abstract :
A design process to realize a low-profile spiral antenna with an antenna height of approximately 1/100 wavelength is presented, where a negative phase constant for the current on the spiral arms is used. For circularly polarized radiation, frequency fN, called the N frequency, is located between the lower bound frequency fL for a fast wave and a transition frequency fTR. The antenna characteristics, including the radiation pattern, gain, and input performance (VSWR) are presented and discussed.
Keywords :
antenna radiation patterns; spiral antennas; VSWR; antenna characteristics; antenna radiation pattern; circularly polarized radiation; circularly polarized spiral antenna design process; double negative property; lower bound frequency; negative phase constant; spiral arms; transition frequency; Antenna radiation patterns; Bandwidth; Microstrip antennas; Reflector antennas; Spirals;
Conference_Titel :
Antennas and Propagation in Wireless Communications (APWC), 2012 IEEE-APS Topical Conference on
Conference_Location :
Cape Town
Print_ISBN :
978-1-4673-0404-7
DOI :
10.1109/APWC.2012.6324900
