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- Jonathan Ethier, D . J . MCNAMARA
- 2010 IEEE International Conference on Wireless…
- 2010

The theory of characteristic modes has been given in [1] for perfectly conducting objects. If we use a moment method formulation such as [2] to model a conducting structure, with N of the RWG expansion functions used, the EFIE is converted into a matrix equation [Z][J]=[V]. Column vector [J] contains the coefficients of the expansion functions for the… (More)

- H. Alroughani, Jonathan Ethier, Dave McNamara
- 2014 International Conference on Electromagnetics…
- 2014

The characteristic modes of perfectly conducting objects computed using modified Green's functions are classified and demonstrated to be the same as sub-structure characteristic modes. We indicate the advantage of the sub-structure viewpoint, and that the idea is easily extended to include lossless dielectric objects as the “rigid” member of… (More)

- Jonathan Ethier, Dave McNamara
- 2012 IEEE International Conference on Wireless…
- 2012

A new technique for the shape synthesis of antennas that are of electrically small or intermediate size was described in preliminary form. Its use of characteristic mode based objective functions allows it to achieve one thing not possible with other shape synthesis methods proposed thus far, namely that we optimize the geometry before defining the… (More)

- H. Alroughani, Jonathan Ethier, Dave McNamara
- 2016 IEEE/ACES International Conference on…
- 2016

Existing characteristic mode tracking algorithms experience difficulties when used for dielectric objects due to the presence of non-physical modes when surface integral equation models are used. It is shown how these problems can be circumvented using a pragmatic approach.

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