Premium
Circularly polarized annular slot antenna with switchable frequency
Author(s) -
Wang ChuenChing,
Chen MuYi,
Row JeenSheen
Publication year - 2013
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.27509
Subject(s) - slot antenna , varicap , optics , microstrip antenna , patch antenna , physics , return loss , electrical engineering , coaxial antenna , microstrip , antenna (radio) , optoelectronics , engineering , capacitance , electrode , quantum mechanics
A design for frequency reconfigurable annular slot antennas with circular polarization (CP) is described.The slot antenna is excited with a shorted microstrip line through coupling, and one varactor diode placed on the slot is used to generate CP radiation. By controlling the dc bias of the varactor, the CP operating frequency of the slot antenna can be switched between two frequencies with a frequency ratio of about 1.6; moreover, the antenna operating at each CP frequency has a return loss of less than 10 dB and the broadside radiation with a peak gain of higher than 3 dB. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1115–1118, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27509