Research Article
A High-Efficiency Compact Planar Antenna for ISM Wireless Systems
Table 1
Comparison of various antennas.
| Antenna type | Total size (mm2) | Measured gain (dBi) |
| Helical antenna [5] | 35.35 × 8.15 () + Extra Ground | | Square-spiral antenna [8] | 51 × 28 | | Metal-shielding box antenna [7] | 82 × 51 | | Meander-line antenna [9] | 86 × 50 | | Proposed antenna | 80 × 30 | 1.2 |
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