Research Article
Substrate Dielectric Constant Effects on the Performances of a Metasurface-Based Circularly Polarized Microstrip Patch Antenna
Table 2
Performance summary of the antenna with different dielectric constants for both the lower and upper substrates.
| Lower substrate dielectric constant, εr1 | Upper substrate dielectric constant, εr2 | Antenna size () | |S11| ≤ −10 BW (%) | AR BW (%) | Peak gain (dBic) |
| 1.06 | 2.2 | 0.82 × 0.82 × 0.046 | 44.54 (4.1–6.45) | 17.39 (4.2–5.0) | 9.31 | 2.2 | 1.06 | 0.91 × 0.91 × 0.051 | 36.6 (4.52–6.55) | 19.55 (4.66–5.67) | 10.16 | 1.06 | 3.38 | 0.73 × 0.73 × 0.040 | 25.9 (3.73–4.84) | 14.47 (3.78–4.37) | 8.46 | 3.38 | 1.06 | 0.82 × 0.82 × 0.046 | 17.39 (4.2–5.0) | 17.39 (4.2–5.0) | 9.69 |
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