Title :
Microwave Nonlinear Directional Coupler Based on Ferrite Film
Author :
Ustinov, Alexey B. ; Timofeeva, Maria A. ; Kalinikos, Boris A.
Author_Institution :
Dept. of Phys. Electron. & Technol., St. Petersburg Electrotechnical Univ.
Abstract :
A microwave nonlinear directional coupler is described for the first time. It is a novel passive device for signal processing directly at microwave frequencies. The suggested nonlinear directional coupler is a four-port device with power-dependent coupling. Variation of the input microwave signal power leads to the switching of the microwave signal from one output port to another. The device consists of the four microwave junctions, attenuator, and ferrite-film nonlinear spin-wave phase shifter. The latter provides a differential nonlinear phase shift which depends on the value of the microwave signal. Design philosophy of the device is developed. The experimentally measured performance characteristics of the elaborated nonlinear directional coupler are presented. These characteristics are in good agreement with the theoretical predictions
Keywords :
ferrite waveguides; microstrip directional couplers; microwave phase shifters; waveguide attenuators; waveguide junctions; differential nonlinear phase shift; ferrite films; four-port device; microwave junctions; microwave nonlinear directional coupler; passive device; power dependent coupling; spin wave phase shifter; Couplings; Directional couplers; Ferrite films; Integrated optics; Magnetostatic waves; Microwave devices; Microwave frequencies; Microwave theory and techniques; Optical signal processing; Phase shifters; Ferrite devices; directional couplers; ferrite films; magnetostatic waves; microwave devices; nonlinear magnetics; nonlinear wave propagation;
Conference_Titel :
Microwave Symposium Digest, 2006. IEEE MTT-S International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-9541-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2006.249460
