Inherently matched Y-junction stripline circulator

Ivanov, S. T.

doi:10.1109/22.575580

Cited by 9 publications

(5 citation statements)

References 8 publications

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“…In this approach, the maximum normalized E-field strength (E Max,norm,peak ) in the cavity (ferrite resonator) is used to find normalized power, that is put in simulation to achieve 1 nJ stored energy. Then, from [42] and [48], the breakdown power of the ferrite resonator is derived as (31):…”

Section: A Peak Power Handlingmentioning

confidence: 99%

“…If we take each of the interfaces of the conventional line and determine the temperature drop from interface to interface, as shown in Fig. 18, then the thermal rise in the center conductor can be calculated from (31). Finally, the maximum average power for the strip-line circulator may be calculated using (32).…”

Section: B Average Power Handlingmentioning

confidence: 99%

“…18. 4) Calculate the thermal rise in each part of the circuit using (31). The thermal conductivity of the metal housing is higher than 100 W/m • C, which results in lower thermal resistance, and its thermal rise may be negligible.…”

Section: B Average Power Handlingmentioning

confidence: 99%

“…Narrowband circulators are normally used at low frequencies where a high degree of isolation is needed. Research works on narrowband circulators using different guiding structures are found in [30], [31], and [32]. Despite the countless studies on the design and synthesis of ferrite circulators, the design of a circulator still deploys the same procedures based on empirical and iterative methods and has no exact design approach.…”

Section: Introductionmentioning

confidence: 99%

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Design and Synthesis of Ferrite Strip-Line Circulator Based on Enhanced Closed Form Solution and Power Handling Analysis

Khim

Cheab²,

Soeung

et al. 2022

IEEE Access

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In this article, Y-junction strip-line circulators are designed using an enhanced closed form solution consisting of unified key equations and a flowchart design, which serves as a direct procedure for designing a ferrite circulator. This design methodology is combined with a 3D EM simulation that allows for the calculation of the saturation magnetization, uniform biasing, and ferrite dimensions needed for a circulator to operate in both modes. In addition, the closed form can be used to calculate the Y-junction parameters and allow the matching network to be calculated and the uniform circulator biasing design ended. Our analysis starts with the ferrite calculation to ensure that it is uniformly biased magnetically, and this is followed by strip-line design, Y-junction matching, and biasing circuit design. Using fullwave electromagnetic (EM), HFSS and magnetostatic (MS), Maxwell3D simulations, several key design parameters such as the saturation magnetization, coupling angle, and various external permanent magnetic biases are investigated. To validate the proposed concept, two strip-line circulators are designed and fabricated for operation in wide-bandwidth and narrow-bandwidth applications. Good agreement is found between the simulated and experimental responses for the S-parameters of the circulators. We also present a semi-analytical analysis of the concept of breakdown, which enables calculation of the peak power and total thermal rise in the strip-line structure. The average power handling capability of a strip-line circulator is studied for the first time. The proposed closed form expressions can also be implemented in various ferrite circulators using different guiding technologies for millimeter-wave applications.

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Section: A Peak Power Handlingmentioning

confidence: 99%

Section: B Average Power Handlingmentioning

confidence: 99%

Section: B Average Power Handlingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Synthesis of Ferrite Strip-Line Circulator Based on Enhanced Closed Form Solution and Power Handling Analysis

Khim

Cheab²,

Soeung

et al. 2022

IEEE Access

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“…However, these circulators have a large circuit size and are not accessible to integrate. In Benevent and colleagues, [14][15][16] stripline circulators have been extensively studied, with low losses and easy integration. This circulator has the potential to handle high power.…”

Section: Introductionmentioning

confidence: 99%

Folded circulator with shorted Y‐junction for high power applications

Guo

Song

et al. 2022

Micro & Optical Tech Letters

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In this letter, a compact suspended-stripline circulator with high powerhandling capability has been proposed. The presented double-knotted circulator is constructed by folding the structure through an air-filled microcoaxial line. Power-handling capability is increased using a single-sided ferrite disc and dielectric loading at the central junction. Moreover, another Y-junction shorted to the ground is coupled on the other side of the substrate to improve the circuit impedance matching. The equivalent circuit model and high power characteristics of the suspended-stripline circulator are proposed and analyzed. An X-band double-knotted circulator has been designed, simulated, fabricated, and measured. The measured results show a reasonable agreement with the simulated ones.

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Planar Model Analysis of Microwave Ferrite Junctions

Ivanov¹,

Dankov²

1997

Microwave Physics and Techniques

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Inherently matched Y-junction stripline circulator

Cited by 9 publications

References 8 publications

Design and Synthesis of Ferrite Strip-Line Circulator Based on Enhanced Closed Form Solution and Power Handling Analysis

Design and Synthesis of Ferrite Strip-Line Circulator Based on Enhanced Closed Form Solution and Power Handling Analysis

Folded circulator with shorted Y‐junction for high power applications

Planar Model Analysis of Microwave Ferrite Junctions

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