Research Article
A Compact Highly Isolated Four-Element Antenna System for Ultra-Wideband Applications
Table 2
State-of-the-art comparison of the proposed antenna with the literature.
| Ref. no | Antenna size (mm2) | Frequency of operation (GHz) | Electrical dimension of the antenna (λ2) | Isolation (dB) | Max. gain (dB) | ECC | DG | CCL |
| [9] | 56 × 68 | 3.89–17.09 | 0.726λ × 0.88λ | 15 | 5.87 | <0.02 | NA | <0.5 | [10] | 34 × 34 | 3.3–3.9, 5-6, 7.4–8.5 | 0.374λ × 0.374λ | 15 | 5.5 | <0.05 | NA | NA | [14] | 80 × 80 | 3 to 4 | 0.8λ × 0.8λ | 25 | 5.8 | <0.02 | 9.9 | <0.4 | [15] | 48 × 34 | 2.1–20 | 0.336λ × 0.238λ | 23 | 2.91 | NA | 9.81 | <0.29 | [17] | 74 × 74 | 3.37–27.71 | 0.831λ × 0.831λ | 34 | 7.68 | <0.039 | NA | NA | [21] | 36 × 35 | 2.6–12.2 | 0.312λ × 0.303λ | 17 | NA | NA | 9.99 | NA | [22] | 40 × 40 | 2.6–12.2 | 0.346λ × 0.346λ | 15 | 3.5 | <0.012 | 9.95 | 0.22 | [23] | 40 × 40 | 1.71–3.94 | 0.228λ × 0.228λ | 25 | 2.36 | <0.4 | 9.71 | 0.13 | [26] | 30 × 30 | 3.1–12 | 0.31λ × 0.31λ | 17 | 6.2 | <0.001 | 9.9 | 0.1 | Proposed work | 20 × 30 | 3.1–12 | 0.206λ × 0.31λ | 25 | 8 | <0.2 | 9.9 | 0.25 |
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