Physical Bounds and Optimal Currents on Antennas
2012 (English)In: IEEE Transactions on Antennas and Propagation, ISSN 0018-926X, E-ISSN 0096-1973, Vol. 60, no 6, 2672-2681 p.Article in journal (Refereed) Published
Physical bounds on the directivity Q-factor quotient and optimal current distributions are determined for antennas of arbitrary shape and size using an optimization formulation. A variational approach offers closed form solutions for small antennas expressed in the polarizability of the antenna structure. Finite sized antennas are solved using Lagrangian parameters in a method of moments formulation. It is also shown that the optimal charge density for a small antenna can be generated by several current densities. Numerical examples for small and large antennas are used to illustrate the results.
Place, publisher, year, edition, pages
2012. Vol. 60, no 6, 2672-2681 p.
Antenna Q, antenna theory, physical limitations, polarizability
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-98728DOI: 10.1109/TAP.2012.2194658ISI: 000304909800008ScopusID: 2-s2.0-84861892765OAI: oai:DiVA.org:kth-98728DiVA: diva2:538909
FunderSwedish Research Council
QC 201207022012-07-022012-07-022012-07-02Bibliographically approved