Antenna splitter
An antenna splitter is a type of crossover in the field of high-frequency technology , which is used to either split high-frequency signals from different frequency bands to different transmitting antennas or to combine the received antenna signals on a common cable. This allows signals received from different antennas at different frequencies to be transmitted on a common cable. Antenna splitters basically consist of a combination of bandpass filters that are matched to the respective frequency ranges of the antennas.
General
When receiving, the signals received from various antennas are combined on a cable so that they can be fed to a receiving device, for example a radio receiver. An example is the joining or separation of FM radio and different television bands such as the CCIR bands II, III, IV, and V.
Antenna splitters for television receivers, as shown in the adjacent picture, are based on passive filter stages that are implemented in the form of a stripline and have a balun for matching the impedance of the stripline to the antenna splitter. At low frequencies up to a few 10 MHz, combinations with discrete components such as capacitors and coils are also used.
If powerful transmitters and receivers are to be connected to a common antenna at the same time, other techniques such as diplexers , directional couplers or circulators are used.
literature
- Friedrich Wilhelm Gundlach (preface): Pocket book of high frequency technology . Ed .: Klaus Lange, Karl-Heinz Locher. tape 1 : Basics. Springer, 1992, ISBN 3-642-58104-8 , pp. R14 ( online ).
- Alois Krischke (DJ0TR): Rothammels Antennenbuch . founded by Karl Rothammel. 13th edition. DARC Verlag, Baunatal 2014, ISBN 978-3-88692-065-5 . Chapter 37.4.
- Walter Fischer: Digital television and radio technology in theory and practice. MPEG baseband coding, DVB, DAB, ATSC, ISDB-T transmission technology, measurement technology . 2nd edition, Springer Verlag, Berlin / Heidelberg 2009, ISBN 978-3-540-88187-2 .
- Erwin Hölzler, Dietwald Thierbach (ed.): News transmission. Basics and technology, Springer-Verlag, Berlin / Heidelberg 1966.