Rodney G. Vaughan
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View article: Survey of the Fixed-Geometry Wheeler Cap Method: The Myth of a Simple Antenna Efficiency Measurement Technique
Survey of the Fixed-Geometry Wheeler Cap Method: The Myth of a Simple Antenna Efficiency Measurement Technique Open
Rigorous experimental estimation of antenna efficiency is challenging and so the simplicity of the fixed-geometry Wheeler cap method has made it an attractive low-cost option. Although experimental results have revealed multiple issues, th…
View article: Finite Element Method Modeling of the Wire Thickness of a Monopole on a Circular Ground Plane
Finite Element Method Modeling of the Wire Thickness of a Monopole on a Circular Ground Plane Open
Simulations and measurements of the input impedance and matching of a cylindrical monopole at the center of a circular ground plane are presented. The design parameters are the monopole length ( to ), the monopole radius ( to ), and the gr…
View article: Near-Field Reception of Dipole Sources Using a Dual-Loaded Loop
Near-Field Reception of Dipole Sources Using a Dual-Loaded Loop Open
The dual-loaded loop is a two-port antenna configured as two half-loops. Its advantage is the ability to sense two field components instead of the single component of a single-port loop. In this study, the theory of the dual-loaded loop is…
View article: mmWave Yagi-Uda Element and Array on Liquid Crystal Polymer for 5G
mmWave Yagi-Uda Element and Array on Liquid Crystal Polymer for 5G Open
Arrays on personal terminals are feasible using mmWave frequencies, but are limited by mutual coupling. A standard specification for MIMO is −15 dB coupling which can be readily attained over a modest bandwidth, and decoupling modification…
View article: Dual-Slot Cavity Antenna for mm-Wave Beamforming Array
Dual-Slot Cavity Antenna for mm-Wave Beamforming Array Open
A cavity-fed, dual-slot element and its 4-element linear array configurations for beam-steering applications at 28 GHz are described. The element cavity is formed from rectangular substrate integrated waveguide (SIW), perturbed at one of i…
View article: Simplifying Through-Forest Propagation Modelling
Simplifying Through-Forest Propagation Modelling Open
Propagation analysis and modeling is critical for radio systems design, but remains a challenge for most through-vegetation situations, including forests. Transmission through such inhomogeneous mixed media is complicated by the many diffe…
View article: Practical Diversity Design for PCB IoT Terminals
Practical Diversity Design for PCB IoT Terminals Open
Mobile or nomadic diversity antennas feature a variety of element types and layouts, mostly PCB-based, reflecting complex design trade-offs between their performance and the required compactness. The design stage is electromagnetic-based b…
View article: Datasets for Face and Object Detection in Fisheye Images
Datasets for Face and Object Detection in Fisheye Images Open
We present two new fisheye image datasets for training face and object detection models: VOC-360 and Wider-360. The fisheye images are created by post-processing regular images collected from two well-known datasets, VOC2012 and Wider Face…
View article: FDDB-360: Face Detection in 360-degree Fisheye Images
FDDB-360: Face Detection in 360-degree Fisheye Images Open
360-degree cameras offer the possibility to cover a large area, for example an entire room, without using multiple distributed vision sensors. However, geometric distortions introduced by their lenses make computer vision problems more cha…
View article: Self‐assembled triangular waveguide slot array for system‐on‐chip applications
Self‐assembled triangular waveguide slot array for system‐on‐chip applications Open
New microelectronic fabrication techniques enable the creation of high‐performance on‐chip antennas by using new or modified antenna designs. A system's performance is normally improved by a high antenna gain which requires an electrically…