Tdk Corporation

Sakae Henmi

Takahide Kurahashi

Hidenori Ohata

Makoto Hasegawa

Kenji Endou

Naoyoshi Sato

Taro Miura

Kazuaki Suzuki

Masako Nukaga

A technique for improving a circulator element for its temperature characteristic is provided. A circulator element including a garnet type ferrite material, and a permanent magnet for applying a direct-current magnetic field to the garnet type ferrite material, wherein Srepresents the saturation magnetization of said garnet type ferrite material at a temperature TSrepresents one at a temperature Tand Srepresents one at a temperature Tand Srepresents the saturation magnetization of said permanent magnet at a temperature TSrepresents one at a temperature Tand Srepresents one at a temperature Twhere TTTand the saturation magnetizations SSSSSand Sare relative values providing that the saturation magnetizations at the temperature Tis 1, and

Circulator element

A non-reciprocal device includes at least one ferrimagnetic member (or). By controlling the FMR linewidth &#x394;H of the ferrimagnetic members (and), intermodulation distortion is controlled.

Method of controlling intermodulation distortion of non-reciprocal device

A non-reciprocal circuit element includes a microstrip TM resonator (n is a positive integer) with a metal disk and branches projecting from the metal disk in a trigonally symmetric structure, and a ferrite magnetic body spontaneously magnetized and coaxially disposed on the microstrip TM resonator. The metal disk and the branches are formed on a non-magnetic dielectric board having a ground conductor on its bottom face. The ferrite magnetic body is arranged so that a position of an electric field node matches to one of the branches.

Non-reciprocal circuit element and millimeter-wave hybrid integrated circuit board with the non-reciprocal circuit element

Growing community of inventors

Tokyo, Japan

Sakae Henmi