Abstract
This article presents a metamaterial transmission-line-based triple-feed network, which is meant for wideband circularly polarized antennas. The feed network itself is capable of an octave bandwidth, from 1.6 to 3.2 GHz, for an amplitude error of ±0.5 dB and phase error of ±10°. Prototype of a triangular slot antenna was implemented to validate the proposed triple-feed network. The measurement results show that the entire antenna has an impedance bandwidth (standing-wave-ratio ≥ 2) of 73.4%, whereas the 3-dB axial-ratio bandwidth is obtained at 27%. Bidirectional beam patterns with opposed polarization senses have been observed.
| Original language | English |
|---|---|
| Pages (from-to) | 1419-1423 |
| Number of pages | 5 |
| Journal | Microwave and Optical Technology Letters |
| Volume | 54 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 2012 |
| Externally published | Yes |
Keywords
- circularly polarized antenna
- composite right/left handed transmission line
- metamaterial transmission line
- triangular slot antenna