Abstract
A novel probe-fed single-layer annular-ring patch antenna for dual-frequency circular polarization is evaluated numerically and experimentally verified. The proposed antenna consists of a small circular patch surrounded by two concentric annular-rings, which is loaded by an unequal lateral cross-slot ground plane. The circularly-polarized frequency ratio of the two resonant modes is tunable to a small value, suitable for wireless communications systems. The patch size of the proposed antenna is reduced by about 53% compared to the conventional circular patch at a given frequency. The radiation characteristics of the novel antenna are also presented.
| Original language | English |
|---|---|
| Pages (from-to) | 2104-2107 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 55 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2007 |
Keywords
- Annular-ring patch
- Axial ratio
- Cross-slot
- Dual-band circular polarization antennas