Khushboo Singh
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View article: A metal-dielectric 3D-Printable metastructure for the radiation enhancement of electromagnetic band-gap resonator antennas
A metal-dielectric 3D-Printable metastructure for the radiation enhancement of electromagnetic band-gap resonator antennas Open
This article introduces a planar, highly transmissive, 3-D printable metastructure with a low profile for enhancing the far-field radiation performance of conventional electromagnetic band-gap (EBG) resonator antennas. The proposed near-fi…
View article: Design and measurement of a multi-feed resonant cavity antenna with in-antenna power combination at mm-wave
Design and measurement of a multi-feed resonant cavity antenna with in-antenna power combination at mm-wave Open
In this paper, we present the design, simulation, fabrication, and measurements of an on-chip dielectric resonator (DR)-fed millimeter-wave high-gain antenna system with in-antenna power combining capability. A low-profile resonant cavity …
View article: Designing Chip-Feed High-Gain Millimeter-Wave Resonant Cavity Antenna (RCA) Array and Optimization of Beam Steering Metasurface
Designing Chip-Feed High-Gain Millimeter-Wave Resonant Cavity Antenna (RCA) Array and Optimization of Beam Steering Metasurface Open
In this article, a chip-fed millimeter-wave high-gain antenna system with in-antenna power combining capability is presented. A low-profile resonant cavity antenna (RCA) array is fed by multiple spherical dielectric resonators (DRs), demon…
View article: Waveguide-Based All-Metal Near-Field Metasurfaces for Linearly and Circularly Polarized Beam Steering Antennas
Waveguide-Based All-Metal Near-Field Metasurfaces for Linearly and Circularly Polarized Beam Steering Antennas Open
This article presents an efficient near-field meta-steering antenna design using metasurfaces composed of waveguide-type, all-metal cells to achieve beam steering in both azimuth and elevation planes. The inherent rigidity of metallic meta…
View article: Dual-Band Passive Beam Steering Antenna Technologies for Satellite Communication and Modern Wireless Systems: A Review
Dual-Band Passive Beam Steering Antenna Technologies for Satellite Communication and Modern Wireless Systems: A Review Open
Efficient beam steerable high-gain antennas enable high-speed data rates over long-distance networks, including wireless backhaul, satellite communications (SATCOM), and SATCOM On-the-Move. These characteristics are essential for advancing…
View article: Dual-band Passive Beam-Steering Antenna Technologies for Low Power Satellite Communication and Modern Wireless Systems: A Review
Dual-band Passive Beam-Steering Antenna Technologies for Low Power Satellite Communication and Modern Wireless Systems: A Review Open
Efficient beam steerable high-gain antennas enable high-speed data rates over long-distance networks, including wireless backhaul, satellite communications (SATCOM), and SATCOM On-the-Move. These characteristics are essential for advancing…
View article: 3-D Printable Metal-Dielectric Metasurface for Risley Prism-Based Beam-Steering Antennas
3-D Printable Metal-Dielectric Metasurface for Risley Prism-Based Beam-Steering Antennas Open
A 3-D printable, planar, metal-dielectric metasurface-based, 2-D beam-steering system for aperture-type antennas is presented in this paper. This beam-steering system, also known as the near-field meta-steering system, comprises two fully …
View article: Spectroscopic and imaging considerations of THz-TDS and ULF-Raman techniques towards practical security applications
Spectroscopic and imaging considerations of THz-TDS and ULF-Raman techniques towards practical security applications Open
Nitrogen-containing high-energy organic compounds represent a class of materials with critical implications in various fields, including military, aerospace, and chemical industries. The precise characterization and analysis of these compo…
View article: Multi-Functional Reconfigurable Intelligent Surfaces for Enhanced Sensing and Communication
Multi-Functional Reconfigurable Intelligent Surfaces for Enhanced Sensing and Communication Open
In this paper, we propose a reconfigurable intelligent surface (RIS) that can dynamically switch the transmission and reflection phase of incident electromagnetic waves in real time to realize the dual-beam or quad-beam and convert the pol…
View article: Suppressing Sidelobes in Metasurface-Based Antennas Using a Cross-Entropy Method Variant and Full Wave Electromagnetic Simulations
Suppressing Sidelobes in Metasurface-Based Antennas Using a Cross-Entropy Method Variant and Full Wave Electromagnetic Simulations Open
Managing sidelobe levels (SLLs) in metasurface-driven beam-steering antennas poses a significant challenge due to intrinsic factors leading to grating lobes. Our proposed method employs an equivalent model to efficiently optimize large per…
View article: Multi-Functional Reconfigurable Intelligent Surfaces For Enhanced Sensing and Communication
Multi-Functional Reconfigurable Intelligent Surfaces For Enhanced Sensing and Communication Open
In this paper, we propose a reconfigurable intelligent surface (RIS) that can dynamically switch the transmission and reflection phase of incident electromagnetic waves in real time to realize the dual-beam or quad-beam and convert polariz…
View article: Suppressing Sidelobes in Metasurface-Based Antennas Using Cross-Entropy Method Variant and Full Wave Electromagnetic Simulations
Suppressing Sidelobes in Metasurface-Based Antennas Using Cross-Entropy Method Variant and Full Wave Electromagnetic Simulations Open
Managing sidelobe levels (SLLs) in metasurface-driven beam-steering antennas poses a significant challenge due to intrinsic factors leading to grating lobes. Our proposed method employs an equivalent model to optimize large periodic metasu…
View article: Coherent terahertz laser feedback interferometry for hydration sensing in leaves
Coherent terahertz laser feedback interferometry for hydration sensing in leaves Open
The response of terahertz to the presence of water content makes it an ideal analytical tool for hydration monitoring in agricultural applications. This study reports on the feasibility of terahertz sensing for monitoring the hydration lev…
View article: Comparison of Physical and System Factors Impacting Hydration Sensing in Leaves Using Terahertz Time-Domain and Quantum Cascade Laser Feedback Interferometry Imaging
Comparison of Physical and System Factors Impacting Hydration Sensing in Leaves Using Terahertz Time-Domain and Quantum Cascade Laser Feedback Interferometry Imaging Open
To reduce the water footprint in agriculture, the recent push toward precision irrigation management has initiated a sharp rise in photonics-based hydration sensing in plants in a non-contact, non-invasive manner. Here, this aspect of sens…
View article: State-of-the-Art Passive Beam-Steering Antenna Technologies: Challenges and Capabilities
State-of-the-Art Passive Beam-Steering Antenna Technologies: Challenges and Capabilities Open
This article reviews the latest developments of beam steering antennas that are entirely passive to realize interference-free, power-efficient, and highly secured end-to-end wireless communication. We briefly introduce metamaterials and me…
View article: Electromagnetic Metasurfaces: Insight into Evolution, Design and Applications
Electromagnetic Metasurfaces: Insight into Evolution, Design and Applications Open
Metasurfaces have emerged as game-changing technology ranging from microwaves to optics. This article provides a roadmap to the evolution of electromagnetic metasurfaces with a focus on their synthesis techniques, materials used for their …
View article: Guest Editorial Disruptive Beam-Steering Antenna Technologies for Emerging and Future Satellite Services
Guest Editorial Disruptive Beam-Steering Antenna Technologies for Emerging and Future Satellite Services Open
The papers in this special section focus on the state-of-the-art of applied and analytical research, including the latest technological advancements and the use of innovative materials and methods to disrupt the way beam-steering antennas …
View article: Accurate optimization technique for phase-gradient metasurfaces used in compact near-field meta-steering systems
Accurate optimization technique for phase-gradient metasurfaces used in compact near-field meta-steering systems Open
View article: Morphological, biochemical and molecular insights on responses to heat stress in chilli
Morphological, biochemical and molecular insights on responses to heat stress in chilli Open
Four heat susceptible and four heat tolerant genotypes of chilli were grown under high temperature as well as control conditions to study the morphological, biochemical and molecular changes occurring in them due to high temperature stress…
View article: Hexagonal Microstrip Patch Antenna Design for UWB Application
Hexagonal Microstrip Patch Antenna Design for UWB Application Open
Microstrip patch antennas is one of the most used antennas for wireless communication. Its key features include a limited bandwidth, low cost, and ease of manufacture. This paper describes about the design of microstrip patch antenna over …
View article: Accurate Optimization Technique for Phase-Gradient Metasurfaces used in Compact Near-Field Meta-Steering Systems
Accurate Optimization Technique for Phase-Gradient Metasurfaces used in Compact Near-Field Meta-Steering Systems Open
Near-field Meta-Steering (NFMS) is a constantly evolving and progressively emerging novel antenna beam-steering technology that involves an elegant assembly of a base antenna and a pair of phase-gradient metasurfaces (PGMs) placed in the n…
View article: IEEE AWPL Special Cluster 2022 on “Disruptive Beam-Steering Antenna Technologies for Emerging and Future Satellite Services”
IEEE AWPL Special Cluster 2022 on “Disruptive Beam-Steering Antenna Technologies for Emerging and Future Satellite Services” Open
The modern-day wireless applications demand a low Size Weight and Power (SWAP)-constrained beam-steerable front-end antennas that can be installed unobtrusively on stationary or mobile platforms, whether on the ground or airborne.These app…
View article: Sub-surface damage detection in marble structures using THz time domain and laser feedback interferometric imaging techniques
Sub-surface damage detection in marble structures using THz time domain and laser feedback interferometric imaging techniques Open
This present collaborative research, undertaken in two different hemispheres, in an effort to address the challenge of early structural and sub-surface assessment of heritage marble architectures, like the Taj Mahal, using two complementar…
View article: Designing Efficient Phase-Gradient Metasurfaces for Near-Field Meta-Steering Systems
Designing Efficient Phase-Gradient Metasurfaces for Near-Field Meta-Steering Systems Open
We investigate the aptness of various order (90°) rotationally symmetric phase-transforming cells for the upper phase-gradient metasurface, which always receives an oblique incidence wave from the lower metasurface in a Near-Field Meta-St…