In recent few years, the antenna and sensor communities have witnessed a considerable
integration of radio frequency identification (RFID) tag antennas and sensors because of the …

In this article, we reconsider the subject of spatiotemporal electromagnetic (EM) energy
around the antenna near field from a fundamental perspective and discuss the use of …

Though commonly used to calculate Q-factor and fractional bandwidth, the energy stored by
radiating systems (antennas) is a subtle and challenging concept that has perplexed …

The tradeoff between radiation efficiency and antenna bandwidth, expressed in terms of Q-
factor for small antennas, is formulated as a multiobjective optimization problem in current …

Optimal currents on arbitrarily shaped radiators with respect to the minimum quality factor
are found using a simple and efficient procedure. The solution starts with a reformulation of …

Antenna current optimization is a tool that offers many possibilities in antenna technology.
Optimal currents are determined in the antenna design region and used for physical …

Decomposition of the electromagnetic energy into its stored and radiated parts is
instrumental in the evaluation of antenna Q and the corresponding fundamental limitations …

The theory of characteristic modes (TCM) provides a set of eigenvalues and eigenvectors
that are determined entirely by a structure's geometry at a particular frequency. When …

Considerable time is often spent optimizing antennas to meet specific design metrics.
Rarely, however, are the resulting antenna designs compared to rigorous physical bounds …

A compact hybrid‐mode antenna is proposed for sub‐6 GHz communication. The proposed
antenna is composed of a slotted rectangular patch, a feeding dipole, and a balun. Three …