A SuperNEC implementation of model besed parameter estimation by interpolating the method of moments impedance matrix

dc.contributor.authorO'Leary, Neil Iain
dc.date.accessioned2008-12-09T10:16:26Z
dc.date.available2008-12-09T10:16:26Z
dc.date.issued2008-12-09T10:16:26Z
dc.description.abstractSuperNEC is a method of moments (MoM) electromagnetic eld solver based on the Numerical Electromagnetics Code (NEC). Much of the simulation time can be attributed to the lling of the impedance matrix, which is performed at each frequency point of interest. Impedance matrix interpolation methods have been implemented in SuperNEC to reduce the computational time required to ll the impedance matrix [Z]. Elements in [Z] vary predictably over frequency and can be approximated by a second order polynomial. A second improved method is implemented where the dominant frequency variation term is removed prior to calculating the tting function. A method of determining the optimum sample range relative to simulation range and maximum interaction distance has been developed. Given the correct choice of sample range the mean error in the MoM solution is less than 10% over the frequency range and the input impedance can be reproduced with good agreement over a wide bandwith. Improvement in the simulation e ciency of 1.7 times can be expected if su cient frequency points are of interest to account for the computational time required to sample the matrix and determine tting function coe cients. This method has been applied to a dipole antenna, an LPDA and a horn antenna. To increase the simulation bandwidth and retain an acceptable level of accuracy, the bandwidth is split into multiple sub-bands.en
dc.identifier.urihttp://hdl.handle.net/10539/5877
dc.language.isoenen
dc.subjectMoM efficiencyen
dc.subjectimpedance matrixen
dc.subjectinterpolationen
dc.subjectSuperNECen
dc.titleA SuperNEC implementation of model besed parameter estimation by interpolating the method of moments impedance matrixen
dc.typeThesisen

Files

Original bundle

Now showing 1 - 2 of 2
No Thumbnail Available
Name:
NEIL_OLEARY_MSC_DISSERTATION.PDF
Size:
1.43 MB
Format:
Adobe Portable Document Format
Description:
No Thumbnail Available
Name:
NEIL_OLEARY_MSC_PAPER.PDF
Size:
175.74 KB
Format:
Adobe Portable Document Format
Description:

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
96 B
Format:
Item-specific license agreed upon to submission
Description:

Collections