Key:communication:microwave
Jump to navigation
Jump to search
 communication:microwave
|
 |
| Description |
|---|
Microwave transmission antenna 
|
| Group: communications |
| Used on these elements |
    |
| Requires |
| Useful combination |
| Status: in use |
| Tools for this tag |
|
Microwave transmission uses usually parabolic antennas which are located on masts/towers on both ends of radio link.
There are no individual masts/towers just for microwave transmission in Germany, they are always used together with mobile phone network antennas: communication:mobile_phone=yes.
Technical background and history
- Microwave transmission in keywords:
- - The first microwave link between Doverem and Calais in 1931. Distance 40 km, parabolic antenna 3 m.
- - The first multichannel link with 9 telephone channels in 1936 between Scotland and Northern Ireland.
- - Building an international network for long distance connections after the World War II. The first transmission of TV broadcast in 1953.
- - Until 1980-1990 there were devices for microwave links for up to 2.700 channels and frequencies between 1.9 GHz and 11 GHz. TV broadcast is transmitted almost exclusively via microwave links.
- - Construction of large telecommunication towers for signal transmission or TV broadcast with large parabolic and horn-reflector antennas between 1950 and 1980. Long connections using several intermediate stations. Analogue directional antennas using vacuum tubes as transmitters needed a lot of maintenance. Large space consumption on the platforms of the towers.
- - From the mid-1980s onwards is microwave transmission gradually replaced by optic cables.
- - Digitization and shutting down of the analogue technology in microwave transmission, with the simultaneous conversion of networks, frequencies and antennas between 1985 and 1990.
How to map
- man_made=mast or man_made=tower or man_made=communications_tower
- tower:type=communication
- communication:microwave=yes
Tags to use in combination
- communication:mobile_phone=yes
- operator=*
- ref=*
- height=*