Research Article
Bacteria Foraging Algorithm in Antenna Design
Table 3
Design and performance parameters for the Yagi-Uda at 300 MHz with and without BFA optimization.
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Element number () | 12-element Yagi-Uda (conventional) | 12-element Yagi-Uda (optimized) | Fixed design parameters: , , MHz Optimized design parameters | Fixed design parameters: , , MHz Optimized design parameters | Length in m | Spacing in m | SWG | Length in m | Spacing in m | SWG |
| 1 | 0.510 | | 10 | 0.492 | — | 10 | 2 | 0.490 | 0.250 | 10 | 0.487 | 0.226 | 10 | 3 | 0.450 | 0.300 | 10 | 0.441 | 0.228 | 10 | 4 | 0.445 | 0.300 | 10 | 0.422 | 0.206 | 10 | 5 | 0.440 | 0.300 | 10 | 0.428 | 0.226 | 10 | 6 | 0.435 | 0.300 | 10 | 0.426 | 0.448 | 10 | 7 | 0.430 | 0.300 | 10 | 0.424 | 0.396 | 10 | 8 | 0.425 | 0.300 | 10 | 0.422 | 0.372 | 10 | 9 | 0.420 | 0.300 | 10 | 0.424 | 0.452 | 10 | 10 | 0.415 | 0.300 | 10 | 0.416 | 0.434 | 10 | 11 | 0.410 | 0.300 | 10 | 0.420 | 0.446 | 10 | 12 | 0.400 | 0.300 | 10 | 0.428 | 0.326 | 10 |
| | Performance parameters | Performance parameters |
| 1 | (Ωs) = | (Ωs) = | 2 | DR (dB) = 12.670 (+-axis) | DR (dB) = 16.3391 (+-axis) | 3 | FTBR (dB) = 10.3248 | FTBR (dB) = 18.2209 | 4 | FSLL (dB) = 8.9446 | FSLL (dB) = 12.3298 | 5 | EHPBW (°) = 29.1124 | EHPBW (°) = 24.6027 | 6 | HHPBW (°) = 30.5694 | HHPBW (°) = 25.3909 |
| | Fitness value | Fitness value |
| FT | 0.4008 | 0.2361 |
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