Exponential line

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A horn loudspeaker can be understood as the acoustic equivalent of an HF exponential line

In high-frequency technology, an exponential line is understood to be an inhomogeneous waveguide whose wave resistance (impedance) changes exponentially along the line . It serves as a high-frequency transformer for anechoic adaptation of a source (e.g. a transmitter ) to a load (e.g. an antenna ).

Horn antennas and their planar counterpart , the Vivaldi antenna , often have the character of an exponential line and are used to adapt to the free space wave resistance . In acoustics , for example, a gramophone loudspeaker or a horn loudspeaker (as in the picture) is based on the principle of exponential conduction .

literature

  • Otto Zinke and Heinrich Brunswig: Textbook of high frequency technology . Springer, Berlin 1973 (2nd ed.), Pp. 94-97. ISBN 3-540-05974-1 .
  • Hans Fricke, Kurt Lamberts, Ernst Patzelt: Basics of electrical communication . BG Teubner Verlag, Stuttgart 1979, ISBN 3-322-94046-2 .
  • H. Meinke, FW Gundlach: Pocket book of high frequency technology. Volume 3: Systems. 5th edition. Springer Verlag, Berlin / Heidelberg 1992, ISBN 3-540-54716-9 .

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