This introduction to antenna theory and design is suitable for senior undergraduate and
graduate courses on the subject. Its emphasis on both principles and design makes it perfect …

The fundamental limits of antennas tie its electrical size to its quality factor (Q-factor) and
radiation efficiency. The Q-factor is linearly proportional to the inverse of the instantaneous …

In this communication, the near-field radiation characteristics of electric and magnetic
antennas when surrounded by a lossy dielectric medium are described. This study is …

The ability to shrink the physical dimensions of an antenna without significant performance
degradation has been of great interest for over half a century. Over the decades, several …

The localization of wireless devices in indoor scenarios presents a major challenge because
of multipath propagation. Hence, the majority of the research community has focused on …

A flexible, planar electrically small antenna (ESA) with omni directional radiation pattern is
designed and fabricated for GPS and WLAN applications resonating at 1.5 GHz and 3.7 …

The policy of permanently assigning a frequency band to a single application has led to
extremely low utilization of the available spectrum. Cognitive radio, with its ability to be both …

A new concept associated with feeding an electrically small antenna is introduced to
overcome the fundamental limits of antennas. This new understanding of input impedance …

This two-part paper reviews recent innovations in circuit design that have accelerated the
miniaturization of sensor nodes. In this second part of the paper, we focus on key building …

The rate of wireless data transmission is limited by the antenna bandwidth. We present an
efficient technique to realize a high-rate direct binary FSK modulation by using the transient …