NON-RECIPROCAL CIRCUIT ELEMENT AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: KITAMURA YOICHI, SHIBATA HIRONOBU, UEDA TETSUYA, OWADA SATORU
• Format: Patent
• Language: English; Japanese
• Published: 23.04.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; WAVEGUIDES

PROBLEM TO BE SOLVED: To provide a small non-reciprocal circuit element capable of being manufactured with small assembly man-hours, and a method for manufacturing the same.SOLUTION: A non-reciprocal circuit element comprises a ferrite substrate 2, a first circuit board 3, and a magnet. The ferrite substrate 2 includes a first principal surface 2A and a second principal surface 2B located on the opposite side of the first principal surface 2A. The ferrite substrate 2 further includes a center electrode 21 formed on the first principal surface 2A, an input/output terminal 22 electrically connected to the center electrode 21, and a ground electrode 23 formed on the second principal surface 2B. The first circuit board 3 includes a base body composed of a dielectric body and including a third principal surface 3A and a fourth principal surface 3B located on the opposite side of the third principal surface 3A, and a wiring pattern 31 provided in the base body. A magnet 4 is arranged on the fourth principal surface 3B. In a plan view, the ferrite substrate 2 is arranged so as to overlap the magnet 4 on the third principal surface 3A. The ground electrode 23 and the wiring pattern 31 are electrically connected. 【課題】小型で、かつ、少ない組立工数で製造可能な非可逆回路素子およびその製造方法を提供する。【解決手段】フェライト基板２と、第１回路基板３と、マグネットとを備える非可逆回路素子であって、フェライト基板２は、第１の主面２Ａと、第１の主面２Ａの反対側に位置する第２の主面２Ｂとを含み、フェライト基板２は、第１の主面２Ａ上に形成された中心電極２１と、中心電極２１と電気的に接続されている入出力端子２２と、第２の主面２Ｂ上に形成された接地用電極２３とを含み、第１回路基板３は、誘電体からなり第３の主面３Ａと第３の主面３Ａの反対側に位置する第４の主面３Ｂを有するベース体と、ベース体に設けられている配線パターン３１とを含み、マグネット４は、第４の主面３Ｂ上に配置され、フェライト基板２は、第３の主面３Ａ上に平面視においてマグネット４と重なるように配置されるとともに、接地用電極２３と配線パターン３１とが電気的に接続されている。【選択図】図１