Patent ID: 6850751

Claim:
A non-reciprocal circuit device comprising: a substrate having magnetism; a magnet provided facing said substrate; a strip line block comprising a plurality of strip lines, and provided adjacent to said substrate, said plurality of strip lines electrically insulated from one another, and multi-layered together; a capacitor connected to said strip line block; and an enclosure for housing at least said substrate, said magnet, and said strip line block, wherein said non-reciprocal circuit device has a length, a width, and a thickness which are denoted respectively by L 1 , L 2 , and L 3 , wherein 2.5 mm< L 1 <7.0 mm, 2.5 mm< L 2 <7.0 mm, and 1.0 mm< L 3 <3.5 mm, said substrate defining an area denoted by S 1 , such that S 1 /( L 1 × L 2 )=0.1−0.78, said magnet having a thickness of L 4 , such that L 4 / L 3 =0.2−0.5, and said magnet defining an area denoted by S 2 , such that S 1 / S 2 =0.15−0.83.