High frequency branching filter device

Abstract

Abstract PURPOSE:To prevent deterioration in branching filter characteristics and an increase in polarized wave dependency by varying the pattern size of a frequency selective surface plate continuously in two directions on the surface plate. CONSTITUTION:Three high-pass type frequency selective surface plates 10 are used, rectangular windows are formed in a metallic thin plate, and formed gratings differ in mutual distance. Further, the surface plates 10 are so slanted that distances between the surface plates 10 are different at points 31-33 where the surface plates 10 are viewed laterally. Namely, the interplate distances at the points 31-33 are made different so that interplate distance Xcostheta= constant, making the electric length between surface plates equal at the points 31-33. Therefore, the detrioration in branching filter characteristics and increase in polarized wave dependency are prevented.

Inventors

• 👤 Ryuichi Iwata
• 👤 岩田　龍一

Bibliographic Details