Research Article
A Rectangular Planar Spiral Antenna for GIS Partial Discharge Detection
Table 2
The value of the designed antenna pattern.
| | Frequency (MHz) | Main lobe width (dB) | Beamwidth 3 dB (deg) | Side-lobe level (dB) |
| | 500 | −24.5 | | | | 1000 | 2.9 | 105.8 | −4.5 | | 1500 | 4.6 | 101.7 | −9.0 | | 2000 | 6.7 | 89.9 | −8.2 | | 2500 | 7.7 | 78.1 | −14.6 | | 3000 | 8.5 | 74.1 | −17.9 |
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