Research Article
Yagi Array of Microstrip Quarter-Wave Patch Antennas with Microstrip Lines Coupling
Table 2
Comparisons between the Yagi array of quarter-wave patch Antennas and the Yagi array of half-wave patch antennas.
| Character | Yagi array of quarter-wave patch antennas (Figure 1) | Yagi array of half-wave patch antennas (Figure 9) |
| Band | 4.68–5.24 GHz | 5.0–5.43 GHz | Fractional bandwidth | 11.3% | 8.25% | Beamwidth (elevation plane) | 56–58° | 42–46° | Beamwidth (azimuth plane) | 44–60° | 80–87° | Gain | 8.65–9.9 dBi | 8.28–10.19 dBi | Front-to-back ratio | >10 dB | >7.4 dB | Radiation angle (from broadside) | 45–50° | 35–40° | Radiation efficiency | 91–98% | 95–99% | Size of driven patch | 8.926 × 40 mm2 | 17.6 × 25 mm2 | Size of ground plane | 100 × 80 mm2 | 115 × 80 mm2 |
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