Compact Suspension-stripline Circulator For High Power Applications

Guo, Song; Song, Kaijun; Wang, Ying; Pan, Yong

doi:10.1109/apmc46564.2019.9038871

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…N ON-RECIPROCAL RF components, such as isolators or circulators, are of increasing importance in emerging RF front-ends as they serve two primary roles: 1) they separate the transmitted from the received RF signals in full-duplex RF transceivers [1], [2], [3] and 2) they protect sensitive RF devices against unwanted reflections [4]. One of the main approaches to realize isolators/circulators is to incorporate ferromagnetic materials within the volume of a two-port or a three-port microwave network and achieve non-reciprocity by applying magnetic biasing [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29]. Notable demonstrations of ferrite-based devices include: 1) waveguide-type isolators/circulators [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], where a ferrite slab is integrated within a 3-D waveguide or a Y-junction; 2) stripline-based [15], [16], [17], [18], <...…”

Section: Introductionmentioning

confidence: 99%

“…One of the main approaches to realize isolators/circulators is to incorporate ferromagnetic materials within the volume of a two-port or a three-port microwave network and achieve non-reciprocity by applying magnetic biasing [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], [15], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29]. Notable demonstrations of ferrite-based devices include: 1) waveguide-type isolators/circulators [5], [6], [7], [8], [9], [10], [11], [12], [13], [14], where a ferrite slab is integrated within a 3-D waveguide or a Y-junction; 2) stripline-based [15], [16], [17], [18], [19] and microstrip-based [20], [21], [22], [23] isolators/circulators; 3) four-port phase shifters, couplers, and circulators in [24],…”

Section: Introductionmentioning

confidence: 99%

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Ferrite-Based Multiport Circulators With RF Co-Designed Bandpass Filtering Capabilities

Ashley

Psychogiou

2023

IEEE Trans. Microwave Theory Techn.

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This article reports on the RF design and practical development of multiport circulators with RF co-designed bandpass filtering functionality. The proposed bandpass filter/circulator (BPFC) concept is based on a hybrid implementation approach, where dual-mode non-reciprocal ferrite-based resonators (FBRs) are cascaded with microwave resonators and mixed-electromagnetic (EM) couplings. In this manner, highly selective bandpass filtering transfer functions are created in the direction of propagation, and high RF signal cancellation is obtained in the reverse direction. A design methodology using coupled-resonator-based synthesis is proposed to facilitate the design of these components using well-known filter design techniques. Various electromagnetically simulated and synthesized examples are presented to demonstrate the operating principles of the BPFC approach alongside its applicability to high-order filtering responses. The BPFC concept is further expanded to the realization of multiport non-reciprocal components. For proof-ofconcept demonstration, four multiport prototypes were designed, manufactured, and measured at S-band.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ferrite-Based Multiport Circulators With RF Co-Designed Bandpass Filtering Capabilities

Ashley

Psychogiou

2023

IEEE Trans. Microwave Theory Techn.

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“…Power handling and waveguide circulators were studied in [38], [39], [40], [41], and [42]. Waveguide circulators have high power handling than strip-line circulators and suitable for high power application, but at low frequencies they become large structures and special mechanical design and multipaction analyses are needed to ensure proper operation and remove thermal energy from the materials [43], [44], [45], [46], [47]. More literature on power handling capabilities have been studied and applied for directional couplers, filters, and waveguide circulators, but not for Y-junction strip-line circulators [48], [49].…”

Section: Introductionmentioning

confidence: 99%

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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Design of Miniaturized S-band High Isolation Strip-line Circulator for 5G Application

Khim

Cheab

Soeung

et al. 2022

2022 International Conference on Future Trends in Smart Communities (ICFTSC)

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Compact Suspension-stripline Circulator For High Power Applications

Cited by 3 publications

References 10 publications

Ferrite-Based Multiport Circulators With RF Co-Designed Bandpass Filtering Capabilities

Ferrite-Based Multiport Circulators With RF Co-Designed Bandpass Filtering Capabilities

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

Design of Miniaturized S-band High Isolation Strip-line Circulator for 5G Application

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