The WSP - 137 is a passive antenna for the reception of weather satellites operating in the 137 - 138 MHz frequency range. Thanks to the use of ultra low loss phase shifters, the system noise of the antenna is well below the atmospheric noise on 137 MHz. This makes the reception of extremely weak signals possible. The WSP - 137 has an earth screen of 8 oversized radials, preventing any nulls in the vertical antenna diagram and thus no noise bars on the received picture. The most unique feature of the WSP - 137 is the polarisation. Thanks to internal and external antenna elements, the antenna is horizontally polarised for signals received at low elevation angles. This improves reception for satellites which are just above the horizon. For signals at higher angles, the WSP - 137 is right hand circular polarised. So the WSP - 137 is able to give the best possible signal from horizon to horizon. All the antenna elements have a leak-path to earth, preventing that static built-up from nearby thunderstorms harm the sensitive input circuitry of the weather satellite receiver.
Features
* Frequency range 137 - 138 MHz ± 1 dB
* Reception pattern: Omni directional
* Polarisation: Horizontal for elevation angles < 20 degrees, changing to right-hand circular on signals with elevation angles of 40 degrees and higher.
* Dimensions: 90 cm height, 1.10 m diameter
* Frequency range 137 - 138 MHz ± 1 dB
* Reception pattern: Omni directional
* Polarisation: Horizontal for elevation angles < 20 degrees, changing to right-hand circular on signals with elevation angles of 40 degrees and higher.
* Dimensions: 90 cm height, 1.10 m diameter
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