Matsushita Electric Industrial Co., Ltd.

Hitoshi Uchi

Hiroshi Kawano

Munenori Fujimura

Shuichiro Yamaguchi

Hiromi Tokunaga

Takayuki Takeuchi

Yasuhiko Horio

Kengo Shiiba

A non-reciprocal circuit device has a length, a width, and a thickness denoted respectively by LLand Land the overall dimensions of 2.5 mm&#x3c;L&#x3c;7.0 mm, 2.5 mm&#x3c;L&#x3c;7.0 mm, and 1.0 mm&#x3c;L&#x3c;3.5 mm. When a projected area of the substrate of the device is orthogonally projected on a plane parallel to a base surface of the substrate is denoted by S, the substrate holds a proportional relation to S/(L&#xd7;L)=0.1 to 0.78. When a thickness of the magnet of the device is denoted by Lthe magnet holds a proportional relation of L/L=0.2 to 0.5. When a projected area of the magnet orthogonally formed on a plane parallel to a surface of the magnet is denoted by Sthey have a proportional relation of S/S=0.15 to 0.83.

Non-reciprocal circuit device, method of manufacturing, and mobile communication apparatus using the same

A compact non-reciprocal circuit device capable of handling a high power without impairment of the characteristics. The non-reciprocal circuit device contains a magnetic substrate that exhibits anisotropic behavior by application of a direct-current magnetic field. On the surface of the substrate, strip-lines are disposed at an angle, being insulated with each other. One end of each strip-line is grounded, and the other end of each is connected through a capacitor to a ground. Of the ends connecting the capacitors, one end connects to a termination resistor; the remaining ends connect each to an input terminal and an output terminal. The non-reciprocal circuit device exhibits non-reciprocal characteristics between the input and output terminals. The case of the device contains an insulating thermal conductor that serves as a heat-radiator for the termination resistor and the strip-lines.

Non-reciprocal circuit device having a thermal conductor

Growing community of inventors

Miyazaki, Japan

Hitoshi Uchi