Physical bounds and optimal currents on antennas

Mats Gustafsson; Marius Cismasu; B. L. G. Jonsson

doi:10.1109/tap.2012.2194658

Physical bounds and optimal currents on antennas

Mats Gustafsson, Marius Cismasu, B. L. G. Jonsson

Department of Electrical and Information Technology

KTH Royal Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Journal	IEEE Transactions on Antennas and Propagation
Volume	60
Issue number	6
DOIs	https://doi.org/10.1109/tap.2012.2194658
Publication status	Published - 2012

Subject classification (UKÄ)

Computational Mathematics

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10.1109/tap.2012.2194658

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title = "Physical bounds and optimal currents on antennas",

abstract = "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.",

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AU - Cismasu, Marius

AU - Jonsson, B. L. G.

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AB - 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.

U2 - 10.1109/tap.2012.2194658

DO - 10.1109/tap.2012.2194658

M3 - Article

SN - 0018-926X

VL - 60

JO - IEEE Transactions on Antennas and Propagation

JF - IEEE Transactions on Antennas and Propagation

IS - 6

ER -

Physical bounds and optimal currents on antennas

Abstract

Subject classification (UKÄ)

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