Kazuhiro Kitatani

Characteristics of magnetostatic surface waves propagating in thin metal film coated ferrimagnetic layered structure

A theoretical and experimental study on magnetostatic surface waves (MSSWs) propagating in a thin metal film covered ferrimagnetic layer structure is discussed. The effect of the finite conductivity of the metal coated on the ferrimagnetic layer is emphasized. The dispersion characteristics of the magnetostatic waves, whose propagation constants are complex, are discussed. Agreement between calculated and experimental values for the propagation loss and the transmission bandwidth of the surface waves is generally good. >

Beam scanning comb-line antenna loading movable dielectric plate

This paper describes a beam scanning antenna that consists of a movable dielectric plate loaded onto a microstrip comb-line antenna. This type of antenna uses a mechanical system and so offers a simple structure and low cost. The main beam direction of the proposed antenna is changed by moving the dielectric plate. The guide wavelength of the microstrip line was measured at the quasi-millimeter wave band (20 GHz) when moving the dielectric plate to investigate the possibility of beam scanning. The proposed antenna was fabricated to experimentally demonstrate its principle operation. A possible beam scanning angle of 20 degrees was confirmed.