Radio frequency communication

摘要

A differential transmission transition interface, comprising: a first and a second buried conducting track providing respectively first and second differential couplings between adifferential RF transmission output and a waveguide; the first buried conducting track extending over an opening (45) of the waveguide to provide a first RF coupling element (368b); and the second buried conducting track extending over the opening (45) to provide a second RF coupling element (468b); wherein: at least a portion (368d) of the first RF coupling element (368b) extends over thewaveguide opening (45) in a first angular direction; at least a portion (468d) of the second RF coupling element (468b) extends over the waveguide opening (45) in a second angular direction that is opposed to the firstangular direction.