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A combiner (German: combiner of information ) consists of a reflective, translucent pane. The combiner superimposes or combines information from the environment with artificially generated information such. B. in the form of a head-up display .

In a head-up display automobile, the combiner is often simply the windshield. In the automotive sector, separate combiners are rarely used in front of the windshield, as these are difficult to accept by drivers.

Electrical engineering

In high-frequency technology, a combiner is an assembly that combines several weaker signals of the same frequency into one stronger signal. At the same time, it isolates the inputs from one another so that they do not influence one another or the other signal generators.

Using a combiner, for example, transmitter output stages can be combined and sent to an antenna, whereby the individual output stages can be operated (relatively) independently of one another.

Depending on the design, the signals are combined in a combiner without a phase shift or, for example, with a 90 ° (quadrature) or 180 ° phase shift. The latter can also be used, for example, to measure the difference between signals.

A combiner is similar to a diplexer . In contrast to the combiner, a diplexer combines signals of different frequencies.


  • Roger L. Freeman: Radio System Design for Telecommunication. Third Edition, John Wiley & Sons Inc, Chichester 2007, ISBN 978-0-471-75713-9 .
  • Mohammad A. Karim: Electro-Optical Displays. Marcel Dekker Inc, New York 1992, ISBN 0-8247-8695-5 .
  • Andrea Richichi, Francoise Delplancke, Francesco Paresce, lain Chelli (eds.): The Power of Optical / IR Interferometry. Springer Verlag, Berlin / Heidelberg 2008, ISBN 978-3-540-74253-1 .
  • David P. Maxson: The IBOC Handbook. Understanding HD Radio (TM) Technology, Taylor & Francis Group, London 2007, ISBN 978-0-240-80844-4 .

See also

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