Temperature range specification of system gain for microwave radio equipment mounted externally

At the higher microwave frequencies, where radio systems are designed with a fade margin to overcome precipitation fading, the temperature range over which this fade margin is required may not have previously been considered. There is substantial evidence that both precipitation fading and multipath fading are temperature-dependent. As a result, the specified required system gain can be significantly reduced, at and towards the extremes of the temperature range, from that needed to meet the maximum precipitation fading. This should result in lowering the cost of the equipment.