Title :
A transversal filter using CPW directional couplers
Author :
Ida, Yutaka ; Imai, Nobuaki ; Ogawa, Eiichi
Author_Institution :
Marata Manuf. Co. Ltd., Kyoto, Japan
Abstract :
A transversal filter using coplanar waveguide (CPW) directional couplers and no active devices has been proposed. It aims to be free from the noise figure problems found in an active transversal filter and also aims to show it can be easily realized with a single-layer structure when the bandwidth is narrower than about 30%. Two types of CPW directional couplers were employed. When using G-S-G-S-G-type directional couplers, connecting section influences between strong and weak couplers were successfully suppressed.
Keywords :
coplanar waveguides; directional couplers; waveguide filters; CPW directional coupler; G-S-G-S-G-type structure; bandwidth; noise figure; single-layer structure; transversal filter; Bandwidth; Coplanar waveguides; Directional couplers; Impedance; Joining processes; Laboratories; Optical filters; Optical resonators; Radio communication; Transversal filters;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
