| ANALYSIS of 144ZL.ANT on 04-07-00 at 21:05 | |
| 144 MHz ZL Special Free Space Symmetric 144.3 MHz 8 6061-T6 wires, centimeters |
|
| len = rear driven element | 100.2 |
| le = front driven element | 96 |
| sp = space between elements | 28.1 |
| 2 current sources p=0° p1=135° Wire 1, center 1 p1 Wire 5, center 1 p |
|
| Forward Gain | 4.29 dBd |
| F/B | 22.32 dB |
| Azimuth Beamwidth | 69° |
| Elevation Beamwidth | 132° |
The 2 folded dipoles that form the ZL Special antenna are of differing sizes. The element at the rear is larger than the front element and forms a reflector. Both dipoles are driven with a phase sift of 135° between the elements. This phase shift is achieved using a length of 300 Ohm ribbon cable which is crossed over between the front and rear dipoles.
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