Title :
Slot line between oppositely-magnetized ferrite layers for broadband, high-nonreciprocity phase shifters
Author :
Koza, C.J. ; El-Sharawy, E.-B.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
A novel phase shifting structure that exhibits both broadband operation and high nonreciprocity is presented. This structure comprises a slot line between two oppositely magnetized ferrite substrates. A full-wave, spectral-domain analysis is used, where Green´s functions are formulated using a transmission matrix approach. By eliminating the use of relatively thick high-dielectric substrates, a bandwidth of 3:1 and a differential phase of 50 degrees /cm are feasible. The addition of thin layers of high-dielectric material is shown to increase the differential phase to over 100 degrees /cm without significantly reducing the bandwidth.<>
Keywords :
Green´s function methods; ferrite devices; phase shifters; spectral analysis; waveguide components; Green´s functions; bandwidth; broadband operation; differential phase; high-nonreciprocity phase shifters; oppositely-magnetized ferrite layers; slot line; spectral-domain analysis; transmission matrix approach; Bandwidth; Dielectric materials; Dielectric substrates; Ferrites; Frequency; Magnetic fields; Magnetic materials; Phase shifters; Propagation constant; Sandwich structures;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.147167
