Quasi-theoretical investigation of four circularly polarized metaloop antennas
Science and Engineering, Hosei University, Koganei, Tokyo, Japan
* Corresponding author: firstname.lastname@example.org
Accepted: 2 November 2018
Published online: 16 January 2019
Four metamaterial line loop (metaloop) antennas, RND-MTLP-C, RND-MTLP-N, SQR-MTLP-C, and SQR-MTLP-N are investigated to clarify the antenna characteristics. Each metaloop is made up of either a C-type metamaterial line or an N-type metamaterial line, where the dispersion characteristics of the unit cell for the C- and N-type metamaterial lines are designed to be as similar as possible. The RND-MTLP-C and SQR-MTLP-C act as a dual-band counter circularly polarized antenna across a fast wave frequency region. It is found that, depending on the deviation factor, the SQR-MTLP-N behaves as a tri-band circularly polarized antenna, but the RND-MTLP-N does not have the tri-band characteristic. The radiation pattern, gain, and input characteristic in terms of the VSWR for the four antennas are clarified.
Key words: Metaloop antennas / circularly polarized wave / polarization / dual-band operation / tri-band operation
© H. Nakano et al., published by EDP Sciences, 2019
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