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Dual circularly polarized loop antenna using a pair of resonant even‐modes
Author(s) -
Xu Lu,
Lu WenJun,
Yuan ChengYing,
Zhu Lei
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21703
Subject(s) - dual loop , physics , circular polarization , loop (graph theory) , turnstile antenna , loop antenna , bandwidth (computing) , optics , reflector (photography) , antenna (radio) , topology (electrical circuits) , coaxial antenna , microstrip antenna , computer science , electrical engineering , telecommunications , engineering , microstrip , mathematics , combinatorics , light source
Conceptual design of dual circularly polarized (CP) square loop antennas using a pair of resonant even‐modes for wireless sensor application is presented. A pair of even‐modes is simultaneously excited within a single, nonuniform square loop element and employed to realize a dual circular polarization characteristic. When the natural boundary conditions of the even‐modes and the feed lines are matched, respectively, a bidirectional dual CP loop antenna can be attained at first. Then, a unidirectional dual CP loop antenna is designed by introducing a simple metallic reflector. Both bidirectional and unidirectional designs exhibit dual CP performance with available operation bandwidth of 10.0% and 8.5%. The design approach is expected to get applications in dual CP antenna designs for wireless sensor systems.