Table 3 Radiation properties across 25 ghz and 30 GHz.
Antenna parameters | Initial antenna array (array #1) | DGS loaded with CSRR (array #2) | DGS loaded with CSRR and oblique slots (array #3) | DGS loaded with CSRR, oblique slots and radiation patches loaded with a slot (array #4) |
|---|---|---|---|---|
Gain (dBi) | 2–3.6 (average: 2.8) | 7–8.5 (average: 7.75) | 7.5–10.8 (average: 9.15) | 10.8–14 (average: 12.4) |
Average gain improvement over initial array #1 (dBi) | – | 4.95 | 6.35 | 9.6 |
Efficiency (%) | 49–63 (average: 56) | 64–73.5 (average: 68.75) | 75.5–81.5 (average: 79.5) | 85–87.5 (average: 86.25) |
Average efficiency improvement over initial array #1 (%) | - | 12.75 | 23.5 | 30.25 |
