The Säntis transmitter is a 123.5 m high transmitting station on the summit of the 2,502 m high Säntis mountain in Switzerland. It is operated by Swisscom. The original microwave station was built in 1955, but because Säntis is directly exposed to north-western weather the unprotected microwave radio antennae regularly iced up in winter. It was therefore decided to rebuild the station and to shield the antennae with polyurethane panels.