Filter circuit device for strip line

Abstract

Abstract PURPOSE:To obtain a stable characteristic by screwing a dielectric base to a bottom face of a shield case via a throughhole of a base retaining member and selecting the shape of the retaining member to shield an electromagnetic wave other than in the wave guide mode so as to eliminate the need for solder ing. CONSTITUTION:A strip line filter circuit 4 is provided on the surface of a ground conductor 6 of the dielectric base 3 and a metallic pattern 8 is provided at the part of the conductor 6 to which a base retaining member 5 is abutted. The ground conductor 6 is in close contact with a bottom face of a shield case 1 and fixed by a screw 7 inserted through a throughhole of the member 5. Then a cover 2 is fitted. In this case, the aperture of the member 5 for the signal transmission part of the filter circuit 4 is designed to be a wave guide structure having a sufficiently high cut-off frequency in comparison with the pass band frequency of the filter circuit 4.

Inventors

• 👤 Yuuji Oosumi
• 👤 Hiroshi Takahashi
• 👤 Takeshi Sato

Bibliographic Details