Coplanar-guide and slot-guide junction circulators

Ogasawara, N.; Kaji, Mitsuo

doi:10.1049/el:19710149

Cited by 22 publications

(6 citation statements)

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“…17 shows a schematic diagram of a quasi-monolithic circulator based o n coplanar transmission lines. Although coplanar circulators have been reported before [17], the (from Fig. 13) .0005 ,004 ,014 0.55 0.95 performance observed in the earlier work was apparently not good enough to warrant further investigation.…”

Section: Iiq = P027rf~ Vfk2/zomentioning

confidence: 77%

Circulators for microwave and millimeter-wave integrated circuits

Schloemann

1988

Proc. IEEE

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The requirements for circulators for use in combination with microwave and millimeter-wave integrated circuits are reviewed, with special emphasis on modules for phased-array antennas. Recent advances in broadbanding and in miniaturization are summarized. Novel types of circulators that are fabricated by attaching a ferrite disc and a suitable coupling structure to the surface of a dielectric or semiconductor substrate ("quasi-monolithic" integration) are described. Methods for achieving complete monolithic integration are also discussed.

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Section: Iiq = P027rf~ Vfk2/zomentioning

confidence: 77%

Circulators for microwave and millimeter-wave integrated circuits

Schloemann

1988

Proc. IEEE

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“…The CPW line was introduced in 1969 by Wen [3]. In 1971; Ogasawara [4] has showed and has confirmed that the Yjunction circulators with CPW successfully operated at certain frequencies. This work is devoted to the study of the three port ferrite circulator using CPW technology.…”

Section: Introductionmentioning

confidence: 99%

Miniature Triangular Circulator with Coplanar Waveguide Structure

El-Bouslemti¹,

Salah-Belkhodja²

2014

IJEEE

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A different form of coplanar triangular circulator structures is proposed in this work. The HFSS is used to simulate the circulator and to check the non-reciprocal characteristics at operating frequency. In this analysis, an insertion loss of-0.21 dB and an non-reciprocity of-33 dB appeared at around 13.5 GHz; these results show good circulation performances of the device. The miniaturization of device need to have a small size which it is a principal advantage of a coplanar triangular circulator. 

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“…Some time ago, Ogasawara first reported a coplanar waveguide circulator on a ferrite substrate. However, no details on the circulator and its transmission characteristics were given in his paper [2]. Koshiji et al [3] have designed a coplanar waveguide with a big cylindrical ferrite post.…”

Section: Introductionmentioning

confidence: 99%

FABRICATION AND MEASUREMENT OF A COPLANAR CIRCULATOR WITH 65 µm YIG THIN FILM

Zahwe¹,

Sauviac²,

Rousseau³

2009

PIER Letters

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A circulator with a coplanar structure is designed and analysed using a three dimensional finite element method. Based on the proposed design, the circulator is fabricated with a YIG (Yttrium Iron Garnet). The thickness of YIG is only 65 µm. The design is planar and realized by stacking several layers, resulting in a potentially simple and low cost industrial process. Simulated results are better than measured ones but circulation is obtained around 9 GHz. Measured insertion loss is 5 dB and isolation is 36 dB giving interesting perspectives for the device.

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Coplanar-guide and slot-guide junction circulators

Cited by 22 publications

References 1 publication

Circulators for microwave and millimeter-wave integrated circuits

Circulators for microwave and millimeter-wave integrated circuits

Miniature Triangular Circulator with Coplanar Waveguide Structure

FABRICATION AND MEASUREMENT OF A COPLANAR CIRCULATOR WITH 65 µm YIG THIN FILM

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