Sabtu, 14 Juli 2012

Antenna diplexer

Antenna diplexer
- A brief overview, a tutorial on the basics of antenna or RF diplexer diplexer used for purposes including enabling a single RF antenna for use by several transmitters ..

An antenna or RF diplexer diplexer is a unit in a single application can be used to allow more than one transmitter to operate on a single RF antenna. Sometimes these units can be called antenna duplexers. Typically an antenna diplexer will allow the transmitter to a different frequency operation using the same antenna. In other applications, an antenna diplexer can be used to allow a single antenna to be used for transmission on one frequency band and receiving on other bands.

Antenna diplexers find many uses. In one common example of an antenna or RF diplexer diplexer used in cellular base station to allow it to send and receive simultaneously. The diplexer antenna allows the system to use the same antenna while preventing the transmitted signal from reaching the receiver and the input block. In other applications diplexer may be used by broadcast stations transmitting at different frequencies at the same time using the same antenna. Use of diplexer allows a single antenna to be used, while preventing the output of a transmitter which fed back into the other output.

Diplexers small antennas can be used in a domestic environment to enable multiple signals to run along a single feeder. In one application may allow a single feeder to be used for television and VHF FM radio reception, or to allow television signals from terrestrial and satellite voice box low (LNB) to pass on the same lead. This RF diplexers are usually relatively low cost as not nearly as demanding specifications that are used for professional installation of the RF diplexer.

Basic concept of antenna diplexer

There are a number of ways to implement the RF diplexers. They all involve the use of filters. In this way the path to a different transmitter and receiver can be separated according to the frequency they use. The easiest way to implement the diplexer is to use low pass and high pass filter despite the band-pass filter can be used. In this way diplexer routes all signals at frequencies below the cut-off frequency of low pass filter to one port, and all signals above the cut-off frequency high pass filter to another port. Also here are the street from between two long-distance from the filter. All the signals that can pass through low pass filter in the diplexer will not be able to pass through a high pass filter and vice versa.

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