Visit ASIAA Homepage Registration Deadline: November 6, 2021
East Asia Submillimeter-wave Receiver Workshop
November 25(Thu)-26(Fri), 2021
Update: Due to recent restrictions, the workshop is fully online.

Oral Presentation

Proof-of-concept experiment on a novel microwave circulator

Author(s): Sho Masui (OPU/NAOJ), Takafumi Kojima, Yoshinori Uzawa (NAOJ), Hideo Ogawa, Toshikazu Onishi (OPU)

Presenter: Masui Sho (Osaka Prefecture University / NAOJ)

We will present a proof-of-concept experiment on a novel microwave circulator utilizing two hybrid couplers and a gyrator which does not use ferrites. A gyrator is a non-reciprocal device that has a 180 degree differential phase shift between waves propagating through it in opposite directions. In our experiment, we realized it by employing two mixers as up/down frequency converters and phase shifters. We successfully demonstrated the circulator operation using commercially available components in a microwave region. This type of circulator could be configured based on compact planar circuits and has a great potential to be applied for the future multi-beam heterodyne receivers. In this talk, we will report on the experimental results and the technical challenges in the circulator or isolator design.

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