Research Article
A Novel Concentric Annular-Ring Slot Dual-Band Circularly Polarized Microstrip Antenna
Table 2
Comparisons between the proposed antenna and other dual-band circularly polarized microstrip slot antennas.
| References | Overall size (mm) | Impedance matching bandwidth | AR bandwidth | Gain (dBic) | Radiation efficiency |
| [9] | | 2.7%/1% | 9.6%/4% | −1.9/−6.9 | — | [10] | | 26.7%/11.3% | 6.1%/6.0% | 5.2/6.3 | — | [11] | | 106% | 32%/5.6% | 3.81/3.44 | — | [12, 13] | | 8.6%/15.5% | 15.7%/15.5% | 4.3/3.0 | — | [14] | | 25.8%/47% | 4.3%/3.6% | 3.3/4.5 | — | This work | | 14%/10% | 1.23%/1.15% | 7.3/6 | 88.7%/79.2% |
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