Title :
A wideband electronically tunable magnetostatic wave notch filter in YIG-GaAs waveguide structure
Author :
Tsai, Chen S. ; Su, Jun
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA
Abstract :
An electronically tunable microwave notch (band-stop) filter has been constructed in an yttrium-iron-garnet (YIG)/gallium arsenide (GaAs) material structure. An incident microwave propagating along the microstrip transmission line in the GaAs substrate is coupled to the magnetostatic surface waves excited in the YIG layer, which is laid upon the microstrip transmission line. Maximum coupling and thus the peak absorption of the output microwave power occur at the ferromagnetic resonance frequency in the YIG film as determined by a bias magnetic field. A tuning range as large as 1.6 to 13.6 GHz in the resonance frequency with the corresponding magnetic field tuning range of 70 to 4000 Oe has been accomplished
Keywords :
UHF filters; gallium arsenide; garnets; magnetic microwave devices; magnetostatic surface waves; magnetostatic wave devices; microstrip lines; microwave filters; notch filters; passive filters; tuning; yttrium compounds; 1.6 to 13.6 GHz; GaAs; GaAs substrate; YFe5O12; YFe5O12-GaAs; YIG; YIG layer; YIG-GaAs; YIG-GaAs waveguide structure; band-stop filter; bias magnetic field; electronically tunable notch filter; ferromagnetic resonance frequency; magnetostatic surface waves; magnetostatic wave notch filter; microstrip transmission line; tuning range; wideband MSW notch filter; Couplings; Gallium arsenide; Magnetic resonance; Magnetic separation; Magnetostatic waves; Microstrip; Microwave filters; Power transmission lines; Resonant frequency; Wideband;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762114
