Research Article
A Compact Penta-Band Low-SAR Antenna Loaded with Split-Ring Resonator for Mobile Applications
Table 4
Proposed antenna vs. literature antennas.
| | Ref no. and year | Applied design methods | Dimension (mm2) | Requirement and name of additional structure | No. of operating bands | Maximum bandwidth | Minimum return loss (dB) | Maximum gain (dBi) | Minimum SAR value |
| | Reference [13], 2021 | AMC structure | 40.5 × 40.5 | Yes and AMC structure | 1 | 510 MHz | −40 | 7.47 | 4.8 (1 gram) | | Reference [14], 2020 | AMC structure | 30.54 × 30.54 | Yes and AMC structure | 1 | 472 MHz | −16 | 8.69 | 0.353 (10 gram) | | Reference [15], 2021 | Optimizing E field | 154 × 74 | Yes and metal rim | 4 | 980 MHz | −27 | Not specified | 1.19 (10 gram) | | Reference [16], 2021 | Optimizing H field | 151 × 71 | Yes and metallic bezels | 1 | 90 MHz | −24 | Not specified | 0.183 (10 gram) | | Reference [17], 2022 | EBG structure | 50.3 × 40 | No | 3 | 1 GHz | Poor | 2.5 | 0.27 (1 gram) | | Reference [18], 2019 | EBG structure | 91 × 91 | No | 1 | 244 MHz | −24 | 2.95 | 0.498 (1 gram) | | Reference [19], 2021 | EBG structure | 36.67 × 40 | Yes and dual feeding | 4 | 750 MHz | −40 | 4.55 | 0.62 (10 gram) | | Reference [40], 2021 | SRR structure | 20 × 13 | Yes and SRR structure | 3 | 1.9 GHz | −34 | 3 | 1.64 (1 gram) | | Reference [41], 2021 | SRR structure | 14 × 28 | No | 4 | 550 MHz | −24 | Not specified | 0.21 (1 gram) | | Reference [42], 2021 | SRR structure | 90 × 42 | Yes and SRR structure | 2 | 60 MHz | −38 | Not specified | 0.50 (10 gram) | | Proposed antenna | SRR structure | 30 × 26 | No additional structure | 5 | 400 MHz | −35 | 6.2 | 0.41 (10 gram) |
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