Yahia M. M. Antar
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View article: Uniformly 3-D-Printed Low-Cost Hedgehog Spherical Lens Antenna
Uniformly 3-D-Printed Low-Cost Hedgehog Spherical Lens Antenna Open
This paper presents a design strategy for a low-profile, low-cost, uniformly 3D-printed dielectric spherical lens antenna, tailored for high-gain communication applications. The proposed approach employs a cost-effective and modified fabri…
View article: Wideband Narrow-Beam 16-Element Two-Port MIMO Array Antenna With High Isolation for Automotive Radar and 5G Millimeter Wave Applications
Wideband Narrow-Beam 16-Element Two-Port MIMO Array Antenna With High Isolation for Automotive Radar and 5G Millimeter Wave Applications Open
An eight-element linear array antenna is designed to provide a narrow beam, wide bandwidth, and high gain for compact electronic devices while mitigating propagation losses. The design is extended to a two-port MIMO array to enhance channe…
View article: Compressed Sensing Digital MIMO Radar Using a Non-Uniformly Spaced SIW Sparse Receiver Array
Compressed Sensing Digital MIMO Radar Using a Non-Uniformly Spaced SIW Sparse Receiver Array Open
A compressed sensing (CS) digital radar system based on a sparse array design is proposed for use in automotive collision-avoidance applications. The proof-of-concept radar system offers an enlarged antenna aperture, employing fewer elemen…
View article: Design of Dual-Band MIMO Array Antenna and Its Characterization for Urban Millimeter Wave Channel Conditions
Design of Dual-Band MIMO Array Antenna and Its Characterization for Urban Millimeter Wave Channel Conditions Open
The multiple-input-multiple-output (MIMO) antenna improves the channel capacity, and the array antenna improves the channel condition. A combined feature benefits the current cellular and other 5G applications. The strength of the MIMO arr…
View article: A Comparative Review on Superdirectivite Antenna Systems in Modern Literature
A Comparative Review on Superdirectivite Antenna Systems in Modern Literature Open
Superdirectivity describes the phenomenon in which an antenna system exceeds its maximum theoretical directivity. Originally developed theoretically in the twentieth century, superdirectivity has regained attention due to the increasing de…
View article: Bio-Inspired Polarization Compass for Solar Azimuth Prediction Under Clear and Cloudy Sky Conditions
Bio-Inspired Polarization Compass for Solar Azimuth Prediction Under Clear and Cloudy Sky Conditions Open
Sunlight becomes partially polarized due to Rayleigh scattering while passing through the atmosphere. Many insects such as ants and beetles utilize the polarization information of skylight for navigation. Unlike magnetic compass and GPS, t…
View article: Slot-Notch Mechanism Enabled Circularly Polarized High Gain Antenna for 5G mm-Wave RF Energy Harvesting
Slot-Notch Mechanism Enabled Circularly Polarized High Gain Antenna for 5G mm-Wave RF Energy Harvesting Open
This article describes the design of a slot-notch mechanism-enabled broadband and high-gain microstrip antenna fed by a microstrip line for fifth-generation (5G) millimeter-wave applications. The antenna is designed using Rogers 4003 subst…
View article: Analysis and Design of Planar Surface Wave Lenses and Application to Leaky-Wave Antennas
Analysis and Design of Planar Surface Wave Lenses and Application to Leaky-Wave Antennas Open
Planar metasurface lens structures based on microstrip technology, optimized to control the propagation of surface waves (SWs), are presented. Two different lenses are studied, i.e., a converging or plane-wave-like lens and a diverging len…
View article: A Novel Yagi Element Integrated Nested Loop Quasi-Self-Complementary Dual-Port Combiner Radiator
A Novel Yagi Element Integrated Nested Loop Quasi-Self-Complementary Dual-Port Combiner Radiator Open
This article presents a quasi-self-complementary radiator structure designed to operate simultaneously as a combiner and an antenna. The dual-port architecture comprises axially symmetric nested microstrip loops. The upper half of the radi…
View article: Physical Origin of the Effective Parameters at Boundaries in Finite Difference Schemes
Physical Origin of the Effective Parameters at Boundaries in Finite Difference Schemes Open
Using the Observable form of Maxwell's equations, we reveal that effective parameters at materials boundaries emerge naturally as anisotropic transfer functions. The complexity of the boundary dictates the order of these functions. Employi…
View article: Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach
Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach Open
In this paper, we present an electromagnetic (EM) Lagrangian approach to quantify the reactive energy density distribution around generic antenna systems operating in the time-harmonic regime. First, we introduce the `period-averaged EM La…
View article: Millimeter-wave planar antenna array augmented with a low-cost 3D printed dielectric polarizer for sensing and internet of things (IoT) applications
Millimeter-wave planar antenna array augmented with a low-cost 3D printed dielectric polarizer for sensing and internet of things (IoT) applications Open
A unique high gain antenna array with a 3D-printed dielectric polarizer is proposed. The packaging of the antenna array feeding structure is eliminated by aggregating the feeding network in between the antenna elements. This has a signific…
View article: Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach
Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach Open
In this paper, we present an electromagnetic (EM) Lagrangian approach to quantify the reactive energy density distribution around generic antenna systems operating in the time-harmonic regime. First, we introduce the `period-averaged EM La…
View article: Antenna Mutual Coupling in Near-field: Insights using Reactive Helicity and EM Lagrangian Density
Antenna Mutual Coupling in Near-field: Insights using Reactive Helicity and EM Lagrangian Density Open
In this letter, we provide new insights into the mutual coupling between antennas, using spatial distribution of near-field reactive Helicity and period-averaged EM Lagrangian density. First, we analytically show that reactive Helicity (gi…
View article: Antenna Mutual Coupling in Near-field: Insights using Reactive Helicity and EM Lagrangian Density
Antenna Mutual Coupling in Near-field: Insights using Reactive Helicity and EM Lagrangian Density Open
In this letter, we provide new insights into the mutual coupling between antennas, using spatial distribution of near-field reactive Helicity and period-averaged EM Lagrangian density. First, we analytically show that reactive Helicity (gi…
View article: Half-Annular Leaky-Wave Antenna With Suppressed Open Stopband: Design and Experimental Testing
Half-Annular Leaky-Wave Antenna With Suppressed Open Stopband: Design and Experimental Testing Open
A new half-annular bull-eye leaky-wave antenna (LWA) design with suppressed open stopband (OSB) and integrated feeding is presented. The 2-D aperture offers a pencil beam with scanning through broadside and with stable gain values as a fun…
View article: High Gain Fan-Beam Pattern Antenna Based on the Utilization of Diffracted Fields From Dielectric Slabs Edges for IoT and Sensing Applications
High Gain Fan-Beam Pattern Antenna Based on the Utilization of Diffracted Fields From Dielectric Slabs Edges for IoT and Sensing Applications Open
A high gain, low-cost antenna structure is designed for a smart car parking system. The antenna uses Printed Ridge Gap Waveguide (PRGW) technology, which is fully shielded, and suppresses any parasitic radiation from the feed, and minimize…
View article: Near-field Correlation in MIMO Antennas: A Necessary Revisit
Near-field Correlation in MIMO Antennas: A Necessary Revisit Open
Traditionally, correlation coefficients calculated based on far-field radiation patterns as well as antenna currents through cross-correlation Green's functions, are utilized to characterize MIMO (multiple-input multiple-output) antennas […
View article: An Electrodynamics Solver for Moving Sources
An Electrodynamics Solver for Moving Sources Open
An Electrodynamics solver for moving sources is introduced. The main challenges and formulation are highlighted. The solver enables the simulation of fields for sources undergoing arbitrary motion. Two examples of uniformly moving current …
View article: Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach
Distribution of Reactive Energy Density around Antennas in Time-Harmonic Regime: An Electromagnetic Lagrangian Approach Open
In this paper, we present an electromagnetic (EM) Lagrangian approach to quantify the reactive energy density distribution around generic antenna systems operating in the time-harmonic regime. First, we introduce the `period-averaged EM La…