Duplexer

The duplexer incorporates the receiver multicoupler system and the transmitter combiner system to a common antenna. Duplexers are especially useful in a microcell application where space is limited, costs are kept to a minimum, and the building owner or manager places limits on the number of antennas allowed in the building.

The types of duplexing that can be used in a wireless system are:

· Separate TX antenna, or no duplexing

· Single, or one antenna

· Double, or two antenna

When no duplexing is used, three separate antennas are connected, on for transmit and two for receiver. This configuration results in lower output power.

In single duplexing, one antenna is used for transmit and receive. A second receive antenna could be connected for receiver diversity. This configuration allows a single antenna to be used but also results in lower output power.

In double duplexing, two antennas are used for both TX and RX and results in the maximum possible output power.