Band-pass filter based on magnetostatic surface waves, exciting by a one screen coplanar line

Abstract

An excitation of magnetostatic surface waves (MSSW) by a one screen coplanar transmission line was considered for the case, when coplanar line is placed at some distance from the ferrite film surface. The dependence of coplanar line impedance on the spacing between the line and ferrite film has been studied for design of band-pass filter. Approximate theoretical method of band-pass filter design is presented. Experimental frequency responses of band-pass filter which utilize a yttrium-iron-garnet (YIG) films with different thickness are presented and compared. Frequency dependences of a one screen coplanar line radiation resistance and insertion losses of band-pass filter are discussed.