Circulator with coplanar waveguide structure | Zendy

Yamamoto Setsuo | Zendy; Shitamitsu Keiko | Zendy; Kurisu Hiroki | Zendy; Matsuura Mitsuru | Zendy; Oshiro Kazunori | Zendy; Mikami Hideto | Zendy; Fujii Shigeo | Zendy

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Circulator with coplanar waveguide structure

Author(s) -

Yamamoto Setsuo,

Shitamitsu Keiko,

Kurisu Hiroki,

Matsuura Mitsuru,

Oshiro Kazunori,

Mikami Hideto,

Fujii Shigeo

Publication year - 2004

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200304536

Subject(s) - circulator , coplanar waveguide , ferrite (magnet) , return loss , materials science , microwave , insertion loss , transmission line , fractional bandwidth , transmission loss , optoelectronics , magnetization , electrical engineering , magnetic field , optics , physics , telecommunications , engineering , composite material , quantum mechanics , resonator , antenna (radio)

A small size circulator with a coplanar waveguide structure was designed and its transmission characteristics were analyzed using a high frequency electromagnetic simulation based on 3D FEM. The circulator consisted of a YIG ferrite substrate and a transmission line and a ground. When a YIG ferrite substrate with a saturation magnetization of 90 mT was used and a magnetic bias field of 64 kA/m was applied, the circulator operates at 6.98 GHz with an insertion loss | S 21 | of 1.06 dB, an isolation | S 31 | of 32.90 dB, a return loss | S 11 | of 29.89 dB, and a bandwidth (at 20 dB) of 43 MHz. The nonreciprocal transmission characteristics are achieved skillfully utilizing the wavy non‐uniform distribution of microwave. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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