Beamforming in series-fed antenna arrays can inherently suffer from beam-squinting. To
overcome the beam-squinting problem, low-dispersion, fast-wave transmission lines can be …

An intimate relation is established between non-Foster reactive elements and loss-
compensated negative-group-delay (NGD) networks. It is shown that any possible network …

This study presents a novel approach to the design and implementation of transmission‐
type negative group delay (NGD) networks based on a coupled line doublet structure. To …

The anomalous dispersion observed in wideband Fabry–Perot Antennas formed by multiple
coupled cavities is explained in terms of modal coupling between several leaky waves. In …

This study reports on negative group velocities in a lumped transmission line, where
capacitors and inductors connected to resistors are placed in the series and shunt branches …

In this article, a compact distributed septuple-band negative group delay circuit (NGDC) is
proposed and analyzed. It is mainly composed of a high–low–high step-impedance …

A novel technique is proposed for the fixed-beam design of leaky wave antennas (LWAs) by
periodically loading multiresonance elements. The single-resonance elements can generate …

An analogy is demonstrated between negative group delay (NGD) networks and non-Foster
reactive elements. It is shown that non-Foster elements and NGD networks influence a …

Non-Foster (NF) circuits are becoming increasingly popular in filters and matching networks
as they allow the cancellation of reactances and thus enable wideband matching. With many …

We show that simple radio-frequency (RF) interferometers can have slow-wave positive
group delay (PGD) or negative group delay (NGD), as well as superluminal propagation …