Over the past decade, characteristic mode analysis (CMA) research has grown from a niche
topic to a mainstream topic, warranting a tutorial-style special issue to survey the significant …

An optimization problem has been formulated to find a resonant current extremizing various
antenna parameters. The method is presented on, but not limited to, particular cases of gain …

Characteristic modes (CMs) of a spherical shell are found analytically as spherical
harmonics normalized to radiate unitary power and to fulfill specific boundary conditions …

A new single‐layer metamaterial lens antenna aimed to operate at 10 GHz is proposed in
this paper. The lens antenna consists of twelve capacitively coupled unit cells distributed …

The theory of characteristic modes is used to analyze antenna arrays. In particular, to study
arrays of thin-wire dipoles backed by an infinite electric ground plane. The proposed theory …

Resonances, ie, extrema of the eigenvalues of characteristic modes for closed perfectly
conducting objects are investigated. The characteristic modal solutions based on the …

The characteristic mode theory gives useful insights into the physical behavior of antennas,
which can be used for the design of single-feed circularly polarized antennas. For example …

Characteristic mode tracking plays a determining role in the correctness of the characteristic
modes (CMs) results. The reliable modal tracking methods are usually either complex or …

Modern antenna systems face serious problems of mutual coupling, which will cause
electromagnetic compatibility problems such as pattern distortion. This article presents an …

The consistent interpretation of modes is crucial in characteristic mode analysis, which can
usually be achieved by mode tracking algorithms. However, the problem of the eigenvalue …