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Fibre connectivity is not always available or cost effective, for which microwave steps up to the plate with links frequently available of 1gbps+.
A system usually consists of an indoor rack mount unit, so called Indoor Unit (IDU), an outdoor unit (ODU) and an antenna, usually a parabolic dish. The ODU can be mounted directly behind the dish, connected via a short length of coax, or significantly away from the antenna. A single ODU, or pair, can be used in a vairety of different configurations but are usually for the purpose of obtaining increased bandwidths.
| NEC Pasolink Microwaves. High capacity at around 1gbps so frequently used where fibre is not easily available for mast backhaul | Large Parabolic Antennas (long range or long wavelength or both) |
A closeup of the back of the link. The protruding handle is generally an obvious indicator of NEC Pasolinks. |
A dual ODU fed large antenna on the Brighton transmitter. |
Another Pasolink. Below is a parabolic antenna with ODU out of shot. On the Corfe Castle Transmitter |
Inside a microwave dish. It's much like a satellite dish with the transmit/receive feed horn infront of a back reflector. |
A pair of Pasolinks behind the parabolic antenna. |
An Indoor unit for an NEC Pasolink. The coax feed to the ODU is on the left.