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Microstrip‐line‐fed printed shorted ring‐slot antennas for circular polarization
Author(s) -
Chen WenShan,
Huang ChienChin,
Wong KinLu
Publication year - 2001
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.1380
Subject(s) - microstrip , circular polarization , microwave , square (algebra) , slot antenna , ring (chemistry) , circumference , optics , microstrip antenna , electrical engineering , physics , engineering , telecommunications , geometry , mathematics , antenna (radio) , chemistry , organic chemistry
Designs of circularly polarized printed shorted annual and square ring‐slot antennas are proposed. Circular polarization (CP) radiation of the shorted ring‐slot antennas is achieved by selecting a proper length of the shorted section in the ring slot, which is about 3.9 and 8% of the mean circumference of annular and square ring slots, respectively, and feeding the ring slot using a microstrip line 90° to the shorted section. Prototypes of the proposed designs have been implemented. Experimental results show that good CP radiation performances are observed, and the 3 dB axial‐ratio CP bandwidths obtained for the annular and square ring‐slot antennas can reach about 8.4 and 8.1%, respectively. Details of the proposed CP designs and obtained experimental results are presented and discussed. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 137–140, 2001.