Title :
A quad-band rat-race coupler based on the Generalized Negative Refractive-Index Transmission-Line concept
Author :
Papanastasiou, A.C. ; Georghiou, E.G. ; Eleftheriades, George
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Cyprus, Nicosia, Cyprus
Abstract :
A quad-band rat-race coupler is presented based on the Generalized Negative Refractive Index Transmission Line (GNRI-TL) unit cell. The methodology for designing unit cells that account for the host transmission line is first described and then deployed for the design and fabrication of a quad-band unit cell operating at four widely used frequency bands. The measured results are compared to the simulated ones yielding reasonable agreement. Finally, a quad-band rat-race coupler is subsequently designed based on the unit cell measurements and the simulated results are presented.
Keywords :
refractive index; transmission lines; waveguide couplers; GNRI-TL unit cell; generalized negative refractive-index transmission-line concept; host transmission line; quad-band rat-race coupler; quad-band unit cell; Computer architecture; Couplers; Measurement units; Microprocessors; Microwave theory and techniques; Power transmission lines; Transmission line measurements; Generalized Negative Refractive Index Transmission Line (GNRI-TL); metamaterial; quad-band; rat-race coupler; unit cell;
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
