APERTURE-COUPLED UNIDIRECTIONAL DIELECTRIC RADIATOR (UDR)

The authors investigate the microstrip excitation of unidirectional di electric radiators (UDRs) in nonradiating dielectric waveguide (NRD) s tructures. A UDR is coupled through a small aperture to a microstrip l ine with its ground plane serving also as the shielding plane of the N RD structure. Measurement results show that the coupling efficiency is high and good matching can he easily achieved. Such a circuit configu ration allows the effective integration of a planar millimetre wave M( H)MIC technique and NRD technique in one system for the best use of bo th techniques for different functions.