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检索条件"主题词=distributed parameter circuits"

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Investigation of Single Phase Reclosing Using Arc Model on the 500 kV Transmission Line from Mae Moh to Tha Ta Ko

Investigation of Single Phase Reclosing Using Arc Model on t...

引用

IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

作者： K. Ngamsanroaj S. Premrudeepreechacharn Electricity Generating Authority of Thailand Uttaradit Thailand Department of Electrical Engineering Chiang Mai University Chiang Mai Thailand

Single phase switching has become an increasingly more viable approach to the operation of EHV systems in recent years. Indeed, single phase reclosing, if successful, represents a significant step in improving system performance and is an attractive, economical means of obtaining acceptable transient stability with fewer lines. Single phase reclosing has the additional benefits of reducing switching overvoltages. This paper addresses the investigation of single phase reclosing using arc model on the on single and double circuit transmission line employing single phase switching due to single line to ground faults The work is performed by EMTP on the Thailand 500 kV transmission line from Mae Moh to Tha Ta Ko. A series of studies have been performed.

关键词： Transmission lines Circuit faults Power generation Power transmission lines Surges Switching circuits Electronic mail distributed parameter circuits EMTP Impedance

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Mixed mode S-parameters analysis for differential networks in integrated circuits

Mixed mode S-parameters analysis for differential networks i...

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International Symposium on Physical & Failure Analysis of Integrated circuits

作者： Yinchao Chen Shuhui Yang College of Photoelectricity Information and Communication Engineering Beijing Information Science and Technology University Beijing China Department of Electrical Engineering University of South Carolina Columbia SC USA

In this paper, we extend the mixed mode S-parameter representation and its properties for a differential network commonly used in integrated circuits and printed circuit boards (PCBs). As an example of a differential network circuit, we illustrate the analysis of a pair of differential traces printed on a PCB using Ansoft HFSS to simulate the S-parameters. The differential pair is a typical transmission line that includes interconnects (vias) and is routed between PCB chip dies. Then we construct a differential schematic circuit using the simulated S-parameters of the PCB traces, and extract its associated Rx voltage signals and eye diagram.

关键词： Scattering parameters Radio frequency Integrated circuit interconnections Crosstalk Circuit simulation Power transmission lines Transmission line theory distributed parameter circuits Insertion loss Information analysis

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Design of a single-feed all-metal 63 GHz Fabry-Perot cavity antenna using a TL and a wideband circuit model

Design of a single-feed all-metal 63 GHz Fabry-Perot cavity ...

引用

Antennas and Propagation Society International Symposium

作者： S. Ali Hosseini Filippo Capolino Franco De Flaviis Department of EECS University of California Irvine CA USA

In this paper, we show a wideband transmission line (TL) model for a Fabry-Perot cavity (FPC) antenna which is designed at a center frequency of 63 GHz using a thick and slotted metallic partially reflective surface. Then, by using the proposed wideband circuit model, we predict the gain and 3dB gain bandwidth of the antenna, assumed as infinitely large in the transverse domain (for the modeling purposes). Finally we compared the circuit model results to the full-wave ones for a FPC antenna of finite extent.

关键词： Broadband antennas Fabry-Perot Flexible printed circuits Predictive models distributed parameter circuits Reflector antennas Slot antennas Transmission line antennas Frequency Bandwidth

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Recent development of ultra-wideband (UWB) bandpass filters using distributed stub transmission line structures

Recent development of ultra-wideband (UWB) bandpass filters ...

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Mediterrannean Microwave Symposium (MMS)

作者： Hussein Nassser Shaman Jia-Sheng Hong Department of Communications Saudi Border Guards Ministry of Interior Riyadh Kingdom of Saudi Arabia Department of Electrical and Electronic Engineering Heriot-Watt University Edinburgh United Kingdom

A brief review and recent progress in developing ultra-wideband (UWB) filters using distributed stub transmission line structures is reported in this paper. Several advanced UWB filters are demonstrated with electromagnetic (EM) simulated and experimental results. The filters are based on a circuit model for an optimum distributed highpass filter consisting of short-circuited stubs separated by non-redundant connecting lines. It is shown that a cross-coupling between non-adjacent resonators or between the input and output (I/O) feed lines can be implemented to generate new transmission zeros which improve the performance of the stub filters. It is also demonstrated that the uniform connecting lines of the stub filter can be replaced by stepped-impedance lines to suppress the spurious harmonic passbands. In addition, stepped-impedance resonators (SIRs) are implemented to generate a narrow notched band inside the UWB passband to avoid interference with existing radio signals.

关键词： Ultra wideband technology Band pass filters Transmission lines Resonator filters distributed parameter circuits Joining processes Passband Circuit simulation Feeds Filtering theory

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High permittivity tape transmission line supported by low permittivity substrate at millimeter-wave frequencies

High permittivity tape transmission line supported by low pe...

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Microwave, MTT-S International Symposium

作者： Ryo-ji Tamaru Futoshi Kuroki Kure National College of Technology Hiroshima Japan

ISBN: (纸本)9781424428038

A new guiding structure which consists of high permittivity tapes inserted in the horizontal mid-plane of a below cutoff parallel metal waveguide was proposed for the realization of mass productive and low loss dielectric waveguides. In this paper, a supporting technique of the high permittivity tape was considered. A guiding structure consisting of the high permittivity tapes attached on a low permittivity substrate was proposed and the transmission characteristics were calculated. From these results, it was obvious that the single mode transmission bandwidth was about 50 GHz at a center frequency of 60 GHz, and moreover, this guide exhibited a low-dispersion performance just as that of the typical high permittivity tape transmission line and the transmission loss was 14.5 dB/ m in the low-dispersion frequency region.

关键词： Permittivity Transmission lines Frequency Dielectric losses Propagation losses Electromagnetic waveguides Prototypes Millimeter wave technology distributed parameter circuits Dielectric substrates

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New technique for the design of ultra-broadband power dividers based on tapered lines

New technique for the design of ultra-broadband power divide...

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Microwave, MTT-S International Symposium

作者： B. Mencia-Oliva A. M. Pelaez-Perez P. Almorox-Gonzalez J. I. Alonso Departamento de Señales Sistemas y Radiocomunicaciones Universidad Politécnica de Madrid Madrid Spain

ISBN: (纸本)9781424428038

Nowadays, there is a great interest to develop systems which cover wide frequency bands. Power dividers are key elements in these systems. In this paper, a new technique for the design of ultra-broadband power dividers based on tapered lines is presented. The key elements are the tapered lines, because they perform wider bands. To improve this 3-port circuit response, resistive elements are used. In order to validate this technique, a 3-12 GHz power divider has been designed, covering the UWB communications band, and developed in microstrip technology. The circuit measurements show a good performance.

关键词： Power dividers Reflection Power transmission lines distributed parameter circuits Impedance Frequency Ultra wideband communication Microstrip Bandwidth Joining processes

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A new design method for a dual-band power divider

A new design method for a dual-band power divider

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IEEE Annual Conference on Wireless and Microwave Technology (WAMICON)

作者： Kwisoo Kim Daehoon Jang Baatarkhuu Dorjsuren Jongsik Lim Dal Ahn Department of Electrical Communication Engineering Soonchunhyang University South Korea Department of Electrical Communication Engineering Soonchunhyang University

This paper presents a dual-band 2 section Wilkinson power divider. The proposed method is used that transmission lines of the divider are transformed to pi-type equivalent circuits, which can be same impedance and electrical length. To validate the proposed method, we design a dual-band divider which is used for 0.9 GHz cellular and 1.8 GHz 3 rd generation system. The specified dual-band divider which has 1:1 power division ratio at two bands is designed, fabricated and measured. The measured results show excellent performance with an insertion loss of less than 0.25 dB, a return loss of less than 118.74 dB, and good isolation characteristics.

关键词： Design methodology Dual band Power dividers Power transmission lines distributed parameter circuits Equivalent circuits Impedance Power measurement Loss measurement Performance loss

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Comparison among different via models based on Feature Selective Validation technique

Comparison among different via models based on Feature Selec...

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IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： Siming Pan Hanfeng Wang Jun Fan UMR/MST EMC Laboratory Missouri University of Science and Technology Rolla MO USA

A new approach is proposed in this paper to validate different uncertain approaches without knowing a standard reference by applying the feature selective validation (FSV) technique. New reference is established by the weighted average of the various approaches. Four via modeling methods including physics-based circuit model, equivalent transmission line model, multiple scattering model, and full wave model are compared and validated by the approach proposed in this paper to illustrate the effectiveness of different via modeling techniques.

关键词： Electromagnetic scattering Electromagnetic modeling distributed parameter circuits Power transmission lines Computational modeling Printed circuits Electromagnetic compatibility Laboratories Computational electromagnetics Circuit simulation

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Realization of Via-free Microstrip Composite Right/Left-Handed Transmission Lines

Realization of Via-free Microstrip Composite Right/Left-Hand...

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German Microwave Conference

作者： Mark A. Eberspaecher Kim Eccleston Thomas F. Eibert Lehrstuhl fur Hochfrequenztechnik Technische Universitat Munchen Department of Electrical and Computer Engineering University of Canterbury

Three via-free microstrip composite right/left handed (CRLH) unit cells are presented, which enable easy and low-cost fabrication of transmission lines exhibiting the infinite wave length phenomenon. All guiding structures are designed in an entirely printed circuit technology based on the transmission line theory and its equivalent circuit. Supported by EM simulation software the unit cells are optimized to operate at a frequency of 10 GHz. Appropriate experiment boards were fabricated and the measurements obtained from a microwave vector network analyzer are compared to the simulated results. Furthermore, an approach is worked out to determine the dispersion characteristics of the unit cells without the need of an equivalent circuit. The introduced and applied method allows to calculate dispersion relations directly based on simulated and measured ABCD parameters Left and right-handed regions are pointed out by the dispersion diagram and the so-called infinite wavelength phenomenon is exhibited.

关键词： Microstrip Transmission lines Transmission line theory Circuit simulation distributed parameter circuits Equivalent circuits Fabrication Printed circuits Frequency Transmission line measurements

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Efficient Design of Multilayer Microwave Modules using an Element-Wise Simulation Technique

Efficient Design of Multilayer Microwave Modules using an El...

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German Microwave Conference

作者： G. Vogt K. H. Druee S. Humbla J. Mueller R. Stephan D. Stoepel J. F. Trabert M. A. Hein Institute for Micro- and Nanotechnologies Ilmenau University of Technology

A technique for the fast and efficient modeling of complex microwave modules is investigated. In order to reduce simulation and optimisation time of spatially extended transmission line structures, a library of basic microwave components together with an approach for the decomposition and cascaded simulation of extended microwave circuits is proposed. To verify the design method, simple test structures as well as constituents of challenging low temperature co-fired ceramics (LTCC) modules from an ongoing R&D project are analysed and evaluated. The promising results encourage further efforts to exploit the discussed method for automated design approaches.

关键词： Nonhomogeneous media Microwave theory and techniques Circuit simulation Design methodology distributed parameter circuits Libraries Microwave circuits Circuit testing Temperature Ceramics

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