Research Article
Proposal of a Planar Directional UWB Antenna for Any Desired Operational Bandwidth
Table 1
Comparison of some parameters of directional antennas.
| | Frequency (GHz) | Boresight gain (dB) | 3 dB beamwidth (degree) | Front-to-back ratio (dB) |
| | Conical antenna with elliptical aperture and reflector | | 3 | 5.1 | 98.3 | | | 6 | 8.0 | 66.8 | | | 9 | 7.0 | 103.6 | | | 12 | 7.2 | 96.5 | | | 15 | 7.8 | 73.9 | | | 18 | 6.8 | 88.0 | |
| | Semiplanar conical antenna with elliptical aperture and reflector | | 3 | 4.6 | 114.5 | | | 6 | 8.5 | 50.7 | | | 9 | 7.7 | 87.9 | | | 12 | 6.6 | 90.5 | | | 15 | 7.1 | 66.4 | | | 18 | 5.8 | 85.0 | |
| | Planar directional antenna | | 3 | 5.3 | 98.6 | | | 6 | 7.6 | 65.4 | | | 9 | 7.8 | 66.1 | | | 12 | 8.3 | 42.7 | | | 15 | 6.6 | 66.9 | | | 18 | 6.4 | 70.0 | |
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