In this paper, physical limitations on the directivity D and Q-factor Q are derived for antennas of arbitrary shape. The quotient D/Q is shown to be bounded from above by the antenna volume and certain shape coefficients in terms of the eigenvalues of the high-contrast polarizability dyadic. The theory is exemplified by numerical results for the half-wave antenna with astonishing agreement.
|Publication status||Published - 2007|
|Event||International Symposium on Electromagnetic Theory, 2007 - Ottawa, Canada|
Duration: 2007 Jul 26 → 2007 Jul 28
|Conference||International Symposium on Electromagnetic Theory, 2007|
|Period||2007/07/26 → 2007/07/28|
Subject classification (UKÄ)
- Electrical Engineering, Electronic Engineering, Information Engineering