TelecomStudy18

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 p...

Overview, of the typical RF antenna design types used with satellites, both on the ground and on the satellite. This includes satellite television (tv) reception. A variety of forms of antenna can be used for transmitting to and receiving from satellites. The most common type of satellite antenna is the parabolic reflector, however this is not the only type of antenna that can be used. The actual type of antenna will depend upon what the overall application and the requirements.  Antenna gain The distances over which signals travel to some satellites is very large. Geostationary ones are a particular case. This means that path losses are high and accordingly signal levels are low. In addition to this the power levels that can be transmitted by satellites are limited by the fact that all the power has be generated from solar panels. As a result the antennas that are used are often high gain directional varieties. The parabolic reflector is one of the most popular. Antennas...

The antenna diplexer or RF diplexer splitter / combiner used for combining and splitting RF fees so they can be used by multiple transmitters of receivers and possibly on different frequencies. An Antenna diplexer is a unit that in one application can be used to enable more than one transmitter to operate on a single RF Antenna. Sometimes these units may be called Antenna duplexers. Typically an Antenna diplexer would enable transmitters operating of different frequencies to use the same Antenna. In another application, an Antenna diplexer may be used to allow a single Antenna to be used for transmissions on one band of frequencies and reception on another band. Antenna diplexers find many uses. In one common example an Antenna diplexer or RF diplexer is used in a cellular base station to allow it to transmit and receive simultaneously. The Antenna diplexer enables the same Antenna system to be used while preventing the transmitted signal from reaching the receiver and blocking t...