Hello Volker,In anechoic chamber the radiation of an antenna is govrned by the Polarizarion loss factor as shown bellow.
given the ludwig3 menu bellow where Z=1 and X=1, what is the pure vectoric definition value of reference antenna L(in the formula)?
Thanks.

 

what is the pure vectoric definition value of reference antenna L(in the formula)?

Hello there!
The use of orthogonal polarization to provide two communications channels for each frequency band has led to interest in the polarization purity of antenna patterns.It is a surprising fact that there is no universally accepted definition of “cross polarization" at the present, and at least three different definitions have been used either explicitly or implicitly in the literature.The IEEE standard [l] definition is“The polarization orthogonal to a reference polarization.” For circular polarization this is adequate, but for linear or elliptical polarization the direction of the reference polarization must still be defined.In your case it has been defined as Ludwig-3. L. L. Tsai “ A numerical solution for the near and far flelds of an annularri & of magnetic current "L" IEEE Trans. Antennas Propaget., vol. AP-20, pp. 56+576, Sept. 1972.