Optimized Monopole and Dipole Antennas for UWB Asset Tag Location Systems

Abstract

Abstract-Miniaturized monopole and dipole antenna designs are reported with performances optimized for Ultra Wideband pulsed radio applications. The geometries are created using Bézier spline shapes, which have been refined with a genetic algorithm to simultaneously take account of both frequency-and time-domain criteria.Time-domain measurements of ultra wideband antennas with uniformly distributed energy across the full 3.1 -10.6 GHz mask are reported for the first time and validate a new approach to minimization of pulse dispersion effects in the antenna designs.Index Terms-optimization methods, ultra wideband antennas, dipole antennas, time domain measurements.

Design Method for Wideband Circularly Polarized Slot Antennas

“…The most common parameter to quantify its impact is fidelity factor. It describes the correlation between the shape of a pulse at antenna input and its shape at a given angle (,) in the far-field [22]. This concept applies well to linearly polarized antennas.…”

Scaling the Effectiveness of Existing Techniques towards Enhancing Performance of UWB Antenna

“…Numerous solutions towards bandwidth optimization were also seen in the literatures [27] considering various shapes of the pulse that can accommodate multiple signals. Such studies find better compatibility with the reconfigurable networks e.g.…”

On-body fidelity factor for footwear antennas over different ground materials

“…The signal was modelled in Matlab and then imported in CST microwave. The spectrum of the RRC is able to fit more efficiently to the UWB mask defined in the standard thanks to the bell-like shape [11] compared to the several derivatives of the Gaussian pulse. The FF [12] is a parameter that compares the shape of two pulses and it is defined in equation (1), where x 1 (t) and x 2 (t) represents two signals.…”

“…The FF is calculated considering the E field probes in the described positions and a Vivaldi antenna on the heel counter as a transmitting antenna [11]. The results are summarized in Table 1.…”