MICROWAVE DIRECTIONAL FILTER Russian patent published in 2002 - IPC

FIELD: broadband selective radio communication systems, telecommunications, radar equipment, and radio navigation. SUBSTANCE: directional filter that has identical input and output transmission lines electromagnetically coupled with loop conductor and disposed in flat metal case is characterized in that halves of mentioned transmission lines are arranged in reciprocating-opposing manner inside rectangular space maximal-length sides of loop conductor. Adjacent ends of respective halves in center of loop conductor are interconnected. EFFECT: enlarged band with respect to fixed attenuation reading level on mass produced foiled dielectric sheets. 4 dwg