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IEE Colloquium on High Frequency Simulation in Practice

8 May 1997

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Displaying Results 1 - 13 of 13
  • Modelling wire antennas in wider simulations

    Publication Year: 1997, Page(s):10/1 - 10/8
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The thin wire models currently available in TLM and FDTD have been found to give comparable results to MoM techniques, except in close proximity to the TLM thin wire at low frequency. Thus, it is concluded that simple wire antennas can be efficiently represented in TLM and FDTD models. The performance of the TLM models was seen to be influenced by boundary proximity, but these effects have not yet... View full abstract»

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  • IEE Colloquium on High Frequency Simulation in Practice (Ref. No.1997/010)

    Publication Year: 1997
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (44 KB)

    The following topics were dealt with: field solvers in engineering; microwave heating simulation using finite elements; finite element solvers for microwave ferrite devices; TLM in EMC and microwave design; finite-difference time-domain power-divider networks design; radiated emissions from high speed digital circuits and integrated antennas; antenna simulation using NEC, FDTD and moment method; a... View full abstract»

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  • Modelling antennas on structures

    Publication Year: 1997, Page(s):9/1 - 9/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    ALDAS is a versatile program which has been in use for a number of years and which uses diffraction theory for computing the effects of a conducting structure on the RF performance of an antenna mounted on or off the structure. Geometrical Theory of Diffraction consists of a number of solutions to canonical problems such as diffraction at an edge, at cone tips, creeping waves et cetera. Since thes... View full abstract»

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  • Simulation of microwave heating using finite elements

    Publication Year: 1997, Page(s):2/1 - 2/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    A finite element programme in C++ was written capable of producing the electric field and temperature distribution in materials heated by microwaves, as well as other forms of electrical energy. A formulation in the time as well as frequency domain using edge elements is possible. For very large industrial problems in electroheat it is essential to be able to run the code on a supercomputer thus r... View full abstract»

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  • Experience of antenna simulation using NEC, FDTD and a novel moment method

    Publication Year: 1997, Page(s):8/1 - 8/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    Electromagnetic field computation strategies can be broadly divided into two camps: integral-equation methods and differential-equation methods. The integral equation methods such as the method of moments are efficient and accurate for small problems that do not involve a dielectric, but the run times of the programs can increase extremely rapidly for more detailed models requiring more data point... View full abstract»

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  • The theory and practice of microwave antenna modelling

    Publication Year: 1997, Page(s):11/1 - 11/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    Antenna analysis can be considered as deriving either implicitly or explicitly the current distribution on a particular structure. Once this is known the radiation properties can be completely characterised. Analysis techniques do not have to explicitly derive the current as by Maxwell's equations currents and fields are directly linked and hence the current is often implied and not explicitly ava... View full abstract»

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  • Field solvers in engineering

    Publication Year: 1997, Page(s):1/1 - 1/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    The 1990s has witnessed the rise to prominence of microwave field solvers in the day-to-day engineering design process. This progress has been possible due to the availability of commercial user friendly tools to engineers, supported by developments in desktop computing power. GMRC has acted as a focus in GEC-Marconi for their evaluation, benchmarking and application. The paper concentrates on `re... View full abstract»

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  • Calculation and measurement of the current induced on a conducting rod when illuminated by a dipole

    Publication Year: 1997, Page(s):12/1 - 12/8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (436 KB)

    At radio frequencies, electromagnetic compatibility (EMC) clearance of aircraft by practical measurement is expensive and becomes a more lengthy process as further electrical and electronic equipment is installed. A means of producing a reduced set of experimental tests is therefore attractive. Complementing such testing by numerical modelling is potentially a useful way of effecting this provided... View full abstract»

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  • Finite element solvers for microwave ferrite devices

    Publication Year: 1997, Page(s):3/1 - 3/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    Microwave ferrite materials are widely used for the design and construction of nonreciprocal phase shift and control components below 40 GHz. In Maxwell's equations a tensor permeability is used to characterise magnetically biased ferrite materials. The entries of this tensor are nonlinear functions of frequency, bias field, material magnetisation and demagnetising effects. This complicated relati... View full abstract»

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  • The application of TLM to practical problems in EMC and microwave design

    Publication Year: 1997, Page(s):4/1 - 4/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (188 KB)

    This paper describes the application of the transmission-line modelling (TLM) method to high-frequency problems with particular emphasis on electromagnetic compatibility (screened rooms and antenna calibration are briefly mentioned) and microwave design problems (a high pass microwave filter and amplifier are briefly mentioned) View full abstract»

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  • The application of the TLM method for the design and analysis of microwave filter circuits

    Publication Year: 1997, Page(s):5/1 - 5/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    In this paper practical applications of the TLM method to the design and analysis of planar microwave filters are presented. The relative practicality behind the designs is discussed in the light of their importance for electromagnetic analysis. It is shown that with the understanding of the design techniques, electromagnetic simulations can provide useful information on the design and predicted r... View full abstract»

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  • Design and optimization of power-divider networks using the finite-difference time-domain method and circuit simulation tools

    Publication Year: 1997, Page(s):6/1 - 6/3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (180 KB)

    Power dividers are widely used RF-components, e.g. within phased array antennas. A stable phase and amplitude distribution is necessary for the generation of the desired antenna patterns. Several kinds of transmission lines with their special properties can be used for the power transfer. The design of a large power divider network requires an accurate knowledge of all incorporated structures (inc... View full abstract»

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  • Simulation techniques for the prediction of radiated emissions from high speed digital circuits and the design of integrated antennas

    Publication Year: 1997, Page(s):7/1 - 7/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (404 KB)

    This paper examines the practical application of advanced theoretical techniques, based on a hybrid combination of circuit theory and rigorous electromagnetic field solutions, to two distinct, but fundamentally related, problems. The first concerns an electromagnetic compatibility scenario, for which prediction of the emissions produced by a 50 MHz CMOS clock circuit combined with a number of simp... View full abstract»

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