CAD of multipactor-free waveguide components for communication satellites

Ludovico, M.; Accatino, L.; Zarba, G.; Mongiardo, M.

doi:10.1109/mwsym.2002.1012278

Cited by 6 publications

(6 citation statements)

References 3 publications

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“…입력 도파관에 임의의 주파수 f 를 갖는 전력이 인가되 었을 때 필터의 입력부분(waveguide WR112)에 걸린 전압 을    라 하고, 필터 내부의 critical gap의 전압을    라 할 때, critical gap에 대한 전압비는 식 (1)과 같이 정의 된다 [4], [5], [8] . …”

Section: -2 전압배율인자(Vmf) 방법에 의한 해석unclassified

A Study on High-Power Handling Capability of X-Band Circular Waveguide Cavity Filter

Lee¹,

Kim²,

Lim³

et al. 2017

J. Korean Inst. Electromagn. Eng. Sci.

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In this paper, we presented the result of the study on high-power handling capability of the X-band circular waveguide cavity filter configured at the output of high power amplifier(120 W) for geostationary satellites. The dual mode circular waveguide cavity filter with 6th order is selected and the physical model of the filter is designed after determination of the size of resonator from mode chart. Multipactor margin analysis is performed by the SEM method and the VMF method. The result shows that the VMF method predicts lower multipactor breakdown thresholds than the SEM method. Evaluating the multipactor margin obtained by the VMF method to ECSS criteria, we could decide to perform multipactor test. The multipactor test conducted in ESA facility shows that multipactor did not occur even until the RF power increased up to 540 W. In consequence, by both analysis and test, we could verify that the X-band circular waveguide cavity filter has the sufficient high-power handling capability to operate on orbit.

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Section: -2 전압배율인자(Vmf) 방법에 의한 해석unclassified

A Study on High-Power Handling Capability of X-Band Circular Waveguide Cavity Filter

Lee¹,

Kim²,

Lim³

et al. 2017

J. Korean Inst. Electromagn. Eng. Sci.

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“…1 is then a fairly accurate representation of the physical structure in the frequency range of interest for voltage and power-handling predictions. Equations ( 4), ( 5), (9), and ( 11) can be combined and solved for the peak voltage in the th capacitive section (13) where is the peak voltage calculated from the direct-coupled prototype, is the specified cutoff angle, and is the characteristic impedance of the th capacitive section.…”

Section: Correspondence Between Model and Physical Structurementioning

confidence: 99%

“…Currently, precise analysis of the field/voltage distribution inside a low-pass filter requires rigorous electromagnetic (EM) modeling, using either modal analysis [9], [10] or numerical techniques such as the finite-element method (FEM) or the finite-difference time-domain (FDTD) method [11]. EM modeling is time consuming and requires detailed design dimensions of the overall structure.…”

Section: Introductionmentioning

confidence: 99%

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

Paolis

Frezza

2013

IEEE Trans. Microwave Theory Techn.

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Novel explicit formulas are introduced in this paper for the prediction of peak voltages and amplification factors in stepped-impedance coaxial and waveguide low-pass filters. Based on a coupling-matrix model and a simplified electromagnetic (EM) formulation, voltages in the filter critical areas are calculated analytically, without need of any 3-D EM simulations. Only filter prototype parameters are required in this method, which is therefore fast and considerably simplifies the power-handling analysis of corrugated filtering structures. The accuracy of the formulas is verified via commercial finite-difference time-domain software and multipactor breakdown test

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“…The minimum mechanical gap is a significant parameter to be considered in the design of low‐pass harmonic waveguide filters with a broad‐band spurious‐free frequency response and high‐power handling capability. A major improvement in the high‐power handling of the filter can be achieved by enlarging its minimum mechanical gap as the control of the size of the gap is a way to prevent the occurrence of multipaction . However, by means of classical devices like E ‐plane corrugated waveguide filters , it is not possible to enlarge the minimum mechanical gap while keeping, simultaneously, a wide rejected band (up to the third harmonic) for the fundamental TE 10 mode.…”

Section: Introductionmentioning

confidence: 99%

Tailoring of higher‐order mode suppression in a high‐power alternative to classical waffle‐iron filters

Teberio

Arregui

Arnedo

et al. 2014

Micro & Optical Tech Letters

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In this article, a novel stepwise technique for the design of high‐power low‐pass harmonic filters is proposed. The fundamental and higher‐order mode suppression process is divided into three different steps. In the first step, the fundamental TE10‐mode rejected band is accomplished by adjusting the height of E‐plane bandstop elements along the propagation direction. In the second step, this arrangement of bandstop elements is made two‐dimensional to suppress the higher‐order TEn0 modes. Finally, the higher‐order non‐TEn0 modes are rejected by controlling the minimum mechanical gap of the filter. The design process ends after the first, second, or third step depending on the intended mode behavior for the filter. The main characteristic of the new design technique is that the filter minimum mechanical gap can always be made much larger than in the classical solution (E‐plane corrugated or waffle‐iron filters) for the same frequency specifications. To validate the control of the higher‐order mode suppression that this method permits, three different filters are designed and compared. Moreover, a prototype has been fabricated and its S‐parameters measured to prove the feasibility of the proposed filters for a tailored frequency response. Finally, its high‐power handling capability has been estimated. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2967–2974, 2014

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CAD of multipactor-free waveguide components for communication satellites

Cited by 6 publications

References 3 publications

A Study on High-Power Handling Capability of X-Band Circular Waveguide Cavity Filter

A Study on High-Power Handling Capability of X-Band Circular Waveguide Cavity Filter

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

Tailoring of higher‐order mode suppression in a high‐power alternative to classical waffle‐iron filters

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