Simplified Prediction of Peak Power-Handling Capability for Stepped-Impedance Low-Pass Filters

Paolis, Fabrizio De; Frezza, Fabrizio

doi:10.1109/tmtt.2013.2244225

Cited by 6 publications

(5 citation statements)

References 14 publications

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“…First, for a filter of order N, the admittance matrix of the circuit prototype (Y CP ) is obtained from the N+2 coupling matrix and the normalized angular frequency ω [35], [36]:…”

Section: Prediction Based On Time-averaged Stored Energymentioning

confidence: 99%

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

González

Alcaide

Marin³

et al. 2022

IEEE J. Microw.

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Multipactor has become a keylimiting factor of the final performance of satellite communication systems, due to the increase in power levels and/or operating frequency bands. As a result, the critical components of these systems must meet demanding multipactor specifications which should be considered during the design process. This paper describes the different techniques available to predict the multipactor threshold power for radio frequency (RF) and microwave passive hardware under continuous wave (CW) excitation, from cumbersome particle simulations to fast approximate methods based on circuit models. All these techniques have been described and compared together for the first time, including also a detailed description of the configuration issues of commercial particle simulators required to obtain accurate multipactor threshold predictions. The techniques are applied to both wideband and narrowband application examples. The predictions have been compared with measured thresholds of manufactured samples obtained with a novel multipactor test bed, thus allowing to highlight the advantages and limitations of each technique and particle simulator. From this paper, it will be possible to choose the most suitable procedure (and an appropriate simulator, if needed) to obtain multipactor threshold prediction of passive hardware.

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“…First, for a filter of order N, the admittance matrix of the circuit prototype (Y CP ) is obtained from the N+2 coupling matrix and the normalized angular frequency ω [35], [36]:…”

Section: Prediction Based On Time-averaged Stored Energymentioning

confidence: 99%

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

González

Alcaide

Marin³

et al. 2022

IEEE J. Microw.

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“…Unlike other passive circuit devices, the power handling of circulators can be divided into two modes: peak power and average power. Their maximum power handling can be determined by the heating in the materials (related to the conductor, dielectric, and magnetic losses), which limits the average power handling capability, and by the dielectric breakdown field strength (related to the maximum peak voltage that the dielectric can withstand under the worst conditions) which limits the peak power handling capability [61], [62], [63], [64], [65], [66], [67]. Circulators destined for operation in space or other highvacuum applications may be susceptible to multipaction and other problems, such as nonlinear effects in the material [43], [44].…”

Section: Power Handling Capability Of the Circulatormentioning

confidence: 99%

“…Peak power is a power that is below the breakdown (P BD ) power, otherwise breakdown may occur. A method of normalization to 1 nJ of stored energy in the cavity was proposed in [67]. 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.…”

Section: A Peak Power Handlingmentioning

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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“…This planar low-pass filter is generally realized in PCB or alumina substrate, with the power handling capability of lower than 10 Watt, which is limited by the breakdown voltage of the capacitor, and the maximum operating current of the inductor. To address the power handling issue, the low-pass filter is often realized in waveguide [4][5] or coaxial line [6][7]. These methods can achieve low insertion loss and high power capability, but large size and complexity in assembly limit their applications in the planar circuits or the integration in micro-systems.…”

Section: Introductionmentioning

confidence: 99%

A C-band folded planar low-pass filter utilizing U-shaped probe for high power TR module

Wang,

Yu,

Deng

et al. 2023

J. Phys.: Conf. Ser.

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In this paper, a C-band folded low-pass filter is realized in the planar circuit by utilizing a U-shaped probe. The proposed filter consists of four microstrip patches and a U-shaped probe. The configuration, equivalent circuit and design method of the proposed filter are demonstrated. A prototype of the low-pass filter operating in C-band has been designed, fabricated and measured. The maximum insertion loss of the fabricated filter is about 0.8 dB from 5 GHz to 6 GHz, while the maximum return loss is -11 dB. The out of band rejection is over 30 dB at 12 GHz. The measured results show reasonable correlation with the ideal circuit and the simulated results. The proposed low-pass filter can be used for the high power transmit/receive (TR) module in active electronically scanned array (AESA).

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Simplified Prediction of Peak Power-Handling Capability for Stepped-Impedance Low-Pass Filters

Cited by 6 publications

References 14 publications

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

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

A C-band folded planar low-pass filter utilizing U-shaped probe for high power TR module

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