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Improved Theory for a Singly Fed Circulary Polarized Microstrip Antenna
Yasuo SUZUKI Taneaki CHIBA
Publication
IEICE TRANSACTIONS (1976-1990)
Vol.E68
No.2
pp.76-82 Publication Date: 1985/02/25 Online ISSN:
DOI: Print ISSN: 0000-0000 Type of Manuscript: PAPER Category: Antenna and Propagation Keyword:
Full Text: PDF>>
Summary:
An improved theory to obtain circularly polarized (CP) waves from a singly fed microstrip antenna is presented. This theory indicates that a singly fed circularly polarized (SFCP) microstrip antenna, in general, is able to produce CP waves at two different frequencies, which are just slightly separated. The two CP operating frequencies can be found through an iterative process. Furthermore, the optimum feed location loci can be determined numerically. Finally, the theoretical results for two kinds of SFCP antennas are compared with the experimental results. The agreement is quite good and the theory validity is confirmed.
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