| EPSRC Reference: |
GR/J40188/01 |
| Title: |
CONCURRENT LARGE SIGNAL/ELECTROMAGNETIC FIELD MICROWAVE CIRCUIT SIMULATION |
| Principal Investigator: |
Fusco, Professor V |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Electronics, Elec Eng & Comp Sci |
| Organisation: |
Queen's University of Belfast |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 April 1994 |
Ends: |
30 June 1997 |
Value (£): |
102,161
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| EPSRC Research Topic Classifications: |
| RF & Microwave Technology |
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Summary on Grant Application Form |
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(I) To mimic EM field behaviour using techniques based on network tearing. (ii) To integrate the EM properties in (i) with large signal active device models (ii) To combine (i) and (ii) using concurrent programming techniques to form a new class of high frequency nonlinear simulator and to validate its predictions.Progress:In this project a circuit has been broken into several smaller circuits which are analysed independently by a variety of FDTD EM field simulation algorithms, each optimised for the specific calculation in hand. These are then connected together on a diakoptics basis by using circuit theory techniques. In this way, the complete circuit behaviour of the overall system has been obtained. As a demonstrator a compact slot loop antenna has been designed using this philosophy. Here a curved slotline loop antenna, coplanar waveguide fed from a slotline balun and short-end coplanar matching network have been analysed piecewise by individual EM field simulations working on a diakoptics basis. Experimental results show that the diakoptics design technique developed is accurate and offers computational speed and memory advantages.In addition a new method of including single linear and nonlinear lumped elements within a 3-D FDTD algorithm has been developed. Here the conductivity parameter associated with those grids occupied by the lumped element is changed according to the functional current-voltage equation that governs the lumped element behaviour. Compared with previously published material the method here is stable, and is simple to implement. In addition, the method can accurately analyse lumped elements of any physical size (i.e. elements can occupy more than one cell). The technique is now being extended to include multiple lumped elements. Publications Relevant to Project 1. Chen, Q., Fusco, V.F., Slotline to Coplanar Waveguide Junction Modelling, IEEE MTT/ED/AP Society Joint Chapter Workshop on CAE, Modelling and Verification, London, ISBN 0951803263, pp 158-163, October 1994.2. Fusco, V.F., Electromagnetic Field Mapping Using Concurrent Processing Techniques, IEEE MTT/ED/AP Society Joint Chapter Workshop on CAE, Modelling and Verification, London, ISBN 0951803263, pp 103-109, October 1994.3. Chew, K.C., Fusco, V.F., Parallel Implementation of the Finite Difference Time Domain Algorithm, To Appear Special Issue on Parallel and Distributed Computing, International Journal Numerical Modelling Electronic Networks, Devices and Fields, May 1995.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.qub.ac.uk |