Title :
Rectangular disk directional couplers with a relatively tight coupling
Author :
Kawai, Tadashi ; Kokubo, Yoshihiro ; Ohta, Isao
Author_Institution :
Department of Electronics, Faculty of Engineering, Himeji Institute of Technology, 2167 Shosha, Himeji, 671-22, Japan
Abstract :
This paper investigates a quadrature directional coupler designed on the basis of two-dimensional electromagnetic field of a rectangular disk configuration, theoretically and experimentally. The present coupler, in particular, is useful for an application to a relatively tight coupling to the extent of about ¿10 dB. A method of flattening the frequency characteristics of the coupling also is shown.
Keywords :
Coupling circuits; Design engineering; Directional couplers; Eigenvalues and eigenfunctions; Electromagnetic coupling; Electromagnetic fields; Electromagnetic scattering; Frequency; Magnetic circuits; Transmission line matrix methods;
Conference_Titel :
Microwave Conference, 1995. 25th European
Conference_Location :
Bologna, Italy
DOI :
10.1109/EUMA.1995.337054
