Improvement in broad band ferrite isolators

Courtois, L.; Forterre, G.; Chiron, B.

doi:10.1063/1.29980

Cited by 3 publications

(3 citation statements)

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“…Fig. 1(a) shows a conventional symmetric edge-mode isolator circuit design commonly found in the literature [6], [7], [8], [9], [10], [13]. This design achieves good impedance matching at both ports through carefully optimized transition tapers.…”

Section: Edge-mode Isolator Analysismentioning

confidence: 99%

“…By asymmetrically loading the guide edges, nonreciprocal behavior can be achieved. Hines's original isolator design has undergone significant development and improvement by various groups [7], [8], [9], [10]. The bandwidth performance of the edge-mode isolator has been extensively investigated by Courtois et al [7] and Forterre et al [8].…”

Section: Introductionmentioning

confidence: 99%

“…Hines's original isolator design has undergone significant development and improvement by various groups [7], [8], [9], [10]. The bandwidth performance of the edge-mode isolator has been extensively investigated by Courtois et al [7] and Forterre et al [8]. There now exist commercial edge-mode isolators which offer operating bandwidths that can approach two octaves.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Insertion Loss Cryogenic Edge-Mode Isolator With 18 GHz Bandwidth

Zeng,

Tong,

Paine

2023

IEEE J. Microw.

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Cryogenic isolators play an important role in low-noise receiver systems widely employed in millimeter and submillimeter telescopes. To enable a significantly wider Intermediate Frequency (IF) bandwidth, there is strong demand for a wideband, low-loss isolator in modern facilities like the Submillimeter Array (SMA) and Atacama Large Millimeter/submillimeter Array (ALMA). In this article, we present a novel cryogenic edge-mode isolator that incorporates an innovative circuit design. Operating at a cryogenic temperature of 4 K, this isolator delivers unprecedented performance, covering a frequency range from 4 GHz to 22 GHz. It exhibits insertion loss of less than 1 dB, together with return loss below -15 dB. In particular, it provides an isolation better than 17 dB across most of the band, a significant improvement over the previous generation of edge-mode isolators. This new isolator design is suitable for a wide array of low-noise receiver applications, from radio-astronomy to quantum computing.INDEX TERMS Calcium vanadium, ferrite devices, isolators, millimeter wave and terahertz components, quantum computing, radio astronomy, YIG.

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