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- Title
Balanced circularly polarized square loop antenna under even‐mode resonance.
- Authors
Yuan, Cheng‐Ying; Lu, Wen‐Jun; Gao, Chen; Zhu, Lei
- Abstract
Abstract: Design approach to a novel balanced, circularly polarized (CP) square loop antenna under even‐mode resonance is proposed in this paper. The loop antenna is diagonally fed by a fork‐like dipole launcher. By matching the respective natural boundary condition of the loop radiator and the dipole launcher, the resonant even‐mode with inherent CP radiation characteristic can be sufficiently excited. Both the bi‐ and uni‐directional cases are designed and investigated. A bi‐directional CP loop antenna with a 3‐dB ratio axial ratio (AR) bandwidth of 6.6% is designed at first. A uni‐directional antenna having a planar metallic reflector is further designed. The uni‐directional loop antenna exhibits excellent uni‐directional CP performance with a high front‐to‐back ratio of 40dB and a 3‐dB AR bandwidth of 7.6% in both theory and experiment.
- Subjects
CIRCULAR polarizers; LOOP antennas; BOUNDARY value problems; BANDWIDTHS; ANTENNAS (Electronics)
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2018, Vol 28, Issue 6, p1
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.21280