Research Article
A Wideband Highly Efficient Omnidirectional Compact Antenna for WiMAX/Lower 5G Communications
Table 1
Comparison with state of the art.
| | Parameter | Reference works | Proposed work | | [18] | [19] | [20] | [21] | [22] | [23] | [24] | [25] | [26] | [27] | [28] |
| | No. of band | 2 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 3 | 1 | 1 | | Resonant frequency (GHz) | 2.45, 5.8 | 2.45, 3.50 | ≈3.44 | 3.8 | 3.4 | 2.475, 3.45 | 3.9 | 3.41, 3.83 | 2.1, 3.5 | ~1.3, ~2.4, ~3.8 | 3.47 | 3.592 | | Reflection coefficient (dB) | ≈ -30, ≈ -23 | -40, -25 | ≈ -24.5 | ≈ -25 | < -10 | ~ -22 | ~ -38 | -31.15 | ~ -38, ~ -22 | ~ -18, ~ -18, ~ -35 | -23 | -46.78 | | Bandwidth (GHz) | 0.48, 1.89 | 0.3, 0.23 | 0.25 | 0.8 | ≈0.27 | 0.1, 0.36 | 1.08 | 0.72 | 1.95 | 0.23, 0.3, 0.7 | 1.01 | 1.40 | | Maximum gain (dB) | — | 6.8 | 3 | 2.3 | 4.8 | ~4 | 6 | 2.5 | 4.044 | 5 | 4.08 | 3.90 | | Maximum efficiency (%) | — | 70 | — | 73 | — | — | — | — | 92 | 80 | — | 98 | | Substrate | FR4 | FR4 | FR4 | FR4 | FR4 | Rogers RT/Duroid | ECCOSTOCK HIK | FR4 | FR4 | FR4 | FR4 | Rogers RT 5880 | | Substrate size () (mm3) | | | | | | | | | | | | | | Year | 2018 | 2019 | 2019 | 2020 | 2018 | 2021 | 2022 | 2020 | 2021 | 2019 | 2021 | 2023 |
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N.B.: means not available. |
