Quasi-optical filter and antenna arrangement with such a filter

摘要

The individual layers comprise different dielectric and/or magnetic properties. The filter plate is located in a signal path of a HF transmission path at a point, at which the HF signal is not passed through a waveguide. The thickness, permittivity, and permeability of the individual layers are so chosen that the signal wave passes through the filter plate almost unattenuated, while at least the first, but possibly also further harmonics are reflected. The dimensions of the filter plate, except the thickness, are more than four wavelength of the signal wave by propagation through air.