Research Article
A Central Symmetrical and Low-Profile Omnidirectional Circularly Polarized Antenna
Table 1
Comparison of reference and the proposed antenna
| Reference | Structure | Usable bandwidth (%) | Max gain (dBi) | Dimensions ( at centre frequency) | Height |
| [6] | Planar | 3.97 | 1.77 | 0.62 × 0.62 | 0.029 | [2] | Planar | 4.3 | 3.3 | 1.74 × 0.31 | 0.039 | [7] | Nonplanar | 0.9 | 1.01 | 0.16 × 0.16 | 0.03 | [4] | Planar | 0.54 | −0.4 | 0.29 × 0.29 | 0.016 | [5] | Nonplanar | 11.55 | 0.86 | 0.25 × 0.25 | 0.082 | [11] | Planar | 0.78 | 0.82 | 0.29 × 0.29 | 0.02 | [1] | Nonplanar | 7.3 | 2.04 | 0.32 × 0.32 | 0.27 | This study | Planar | 1 | 1.15 | 0.27 × 0.27 | 0.012 |
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