To provide a nonreversible circuit element that can be reduced in size as a whole by reducing the insertion loss after improving the action of a bias magnetic field.
This nonreversible circuit element is provided with a magnetic substrate 5, a plurality of line conductors 6, 7, and 8, a plurality of capacitor substrates 11 and 12 arranged around the substrate 5, and a magnet member 4 for impressing bias magnetic field in the main body 9 of a yoke composed of an upper yoke and a lower yoke 3. The line conductors 6, 7, and 8 are piled up on one surface side of the magnetic substrate 5, and the end sections of the conductors 6, 7, and 8 are connected to the capacitor substrates 11 and 12. In addition, the magnet member 4 is formed to have major and minor axes and a curved-surface portion at least at part of its outer peripheral section.
ONISHI HITOSHI
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama