Implementation of Magnetoelectric Dipoles in Metasurfaces for 5G Applications

This paper proposes to use magnetoelectric dipoles (ME-dipoles) to design a frequency selective surface (FSS) for the first time, and then a polarized and a transmittarray. Based on the design concept, we believe that the ME-dipoles in these metasurfaces can be replaced with other ME-dipoles to form other metasurfaces.

Is powering up IoT wireless sensors by ambient RF energy found in everyday environments feasible?

This paper presents a RF energy harnessing system prototype that demonstrates it is possible to sense temperature, pressure and humidity and wirelessly transmit these signals to a central server with a duty cycle of approximately 15 minutes, when the background ambient RF signals are as low as -28.6 dBm at 950 MHz.

Next-Generation Healthcare: Enabling Technologies for Emerging Bioelectromagnetics Applications

A comprehensive overview of enabling technologies opening new and unexplored opportunities in body area sensing and stimulation is provided. Emerging bioelectromagnetics applications that may readily benefit from such technologies, with the potential to ultimately transform healthcare, sports, consumer electronics, and beyond, are discussed. Challenges, opportunities, and future directions are also highlighted.

Recent Articles

Wideband Substrate Integrated Cavity-Backed Dielectric Resonator Antenna at Sub-6-GHz Band
December 26 2022Reza Shamsaee Malfajani, Jean-Jacques Laurin and Mohammad S. Sharawi present the design and implementation of a wideband single-mode dielectric resonator antenna (DRA) with a substrate integrated cavity-backed structure. Two short-circuited striplines with differential feeding are placed inside the substrate integrated cavity (SIC) for pure mode excitation of the DRA, providing stable radiation characteristics, and low cross polarization levels.
Surface Electromagnetic Waves at Seawater-Air and Seawater-Seafloor Interfaces
December 26 2022Igor I. Smolyaninov, Quirino Balzano and Alexander B. Kozyrev present a detailed analytical and numerical consideration of TE and TM polarized surface electromagnetic wave properties. The resulting surface waves have propagation constants that permit communication ranges far longer than those of bulk propagation in the lossy media. They demonstrate theoretically and experimentally their ability to carry broadband radio signals over practical communication distances underwater.
An Innovative Method to Treat Very Small Apertures in Ray-Tracing Simulations
December 15 2022Andrea Sacchetti and Matthias Oscity address a specific type of configurations where typical ray-tracing simulations can fail to produce meaningful results, namely when the light intensity transmitted by a very small aperture needs to be determined. They lay down the mathematical formalism behind the method and present it also in the form of a simple, generalizable algorithm. An experimental test that confirms the validity of the proposal across a range of aperture sizes are also provided.
mmWave Yagi-Uda Element and Array on Liquid Crystal Polymer for 5G
December 13 2022Rajveer S. Brar and Rodney G. Vaughan present a Yagi-Uda structure on PCB with a bandwidth from 22 to 44 GHz to cover a set of standard mmWave bands for 5G. Their prototype uses the RFIC packaging material Liquid Crystal Polymer which is suitable for Antenna-in-Package technology. The associated improvements in the impedance bandwidth, scan range, gain and radiation efficiency are presented for edge- and corner-mounted arrays designed for a mobile terminal such as a cellphone.
Efficiency-Driven Design for Planar Antennas With Lossy Materials
December 9 2022Purna B. Samal, Shengjian J. Chen, Tran T. Tung, Dusan Losic and Christophe Fumeaux demonstrates a design strategy for improving the radiation efficiency of a planar antenna made of a layered conductor of MXene with modest conductivity on a lossy PDMS substrate. They also proposed new methods to reduce the conductor loss and the dielectric loss. The optimized antenna exhibits a high radiation efficiency of 71% and offers a wide impedance bandwidth of 56% covering operation for the 5 GHz WLAN band.
Low Profile GRIN Lenses With Integrated Matching Using 3-D Printed Ceramic
December 8 2022Yongduk Oh, Neal Kordsmeier, Hussain Askari and Jacob J. Adams investigate a shortened horn antenna with high gain that is enabled by a 3D-printed gradient index (GRIN) lens composed of high permittivity zirconia. The baseline H-plane sectoral horn antenna is designed with length that is 1/3 of the optimal horn antenna and exhibits a low gain due to the high flaring rate of the horn. Increased gain is achieved by adding a flat GRIN lens at the horn aperture.
Dual-Polarized 6–18-GHz Antenna Array With Low-Profile Inverted BoR Elements
December 8 2022Matti Kuosmanen, Sten E. Gunnarsson, Johan Malmström, Jari Holopainen, Juha Ala-Laurinaho and Ville Viikari investigates a dielectric-loaded Vivaldi-type antenna array that is formed inside a plastic block. It utilizes the inverted body-of-revolution (BoR) structure, where cone-shaped cavities are formed in a dielectric material and metalized from the inside.