Patent ID: 6351244
Filing Date: 2002-02-26
Classification: H01Q

Abstract:
Arrangement for use in an antenna array for transmitting and receiving at at least one frequency in at least one first and one second polarization, comprising:at least two antenna elements, where each antenna element is intended for one of the two polarizations, the antenna elements being arranged on a feeding structure which conducts electrical signals to and from the antenna elements; wherein the feeding structure comprises a number of waveguides dimensioned for the said at least one frequency, wherein different waveguides are used for feeding antenna elements intended for different polarization, wherein the waveguides are completely or partially filled with a material, the dielectric constant of which is higher than that of air, whereby an antenna array with small or negligible grating lobes can be obtained; and wherein the antenna elements are arranged in a first separate plate which has its major extension in a first and a second plane of extension, which first plate is arranged on the feeding structure.