Non-reciprocal circuit device and transmitting / receiving device

Abstract

Abstract PROBLEM TO BE SOLVED: To deal with the demand for miniaturization and cost reduction and to suppress the dispersion of characteristics or the increase in insertion loss by forming a coupling electrode for detecting the power of transmission signal on a dielectric substrate forming capacitance for matching to be connected to respective center electrodes. SOLUTION: Near a 1st capacitance electrode C1 on a dielectric substrate 24, a coupling electrode 35 is patterned and this coupling electrode 35 is simultaneously formed from the same material as capacitance electrodes C1-C3. Namely, the coupling electrode 35 is integrally formed on the dielectric substrate 24 as the component of the isolator 12, the coupling electrode 35 and the capacitance electrode C1 for matching at an input port are coupled by electrostatic capacitance and transmission power is detected. Therefore, a coupling circuit can be built in the existing isolator 12, and a circuit configuration by other components can be unnecessitated. As a result, a mounting area can be reduced, the number of parts can be decreased, and the miniaturization and cost reduction of the entire transmission/reception equipment can be dealt with. Besides, the dispersion of characteristics can be canceled and the increase of the insertion loss can be avoided.

Inventors

• 👤 Toshihiro Makino
• 👤 敏弘 牧野
• 👤 Akito Masuda
• 👤 昭人 増田
• 👤 Takashi Hasegawa
• 👤 長谷川　　隆
• 👤 Takashi Kawanami
• 👤 崇 川浪

Bibliographic Details