Junping Geng
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View article: The effect of heat-sensitive moxibustion in the elderly with nocturia: protocol for a randomized controlled trial
The effect of heat-sensitive moxibustion in the elderly with nocturia: protocol for a randomized controlled trial Open
Background Nocturia is a common and bothersome symptom in the elderly population, significantly impacting their quality of sleep and overall well-being. Heat-Sensitive moxibustion (HSM) is effective for elderly people with nocturia, but it…
View article: The Tilted-Branch Comb-Structure and Its Application to Beam Switchable Antenna in Wideband for Indoor Wi-Fi Communication
The Tilted-Branch Comb-Structure and Its Application to Beam Switchable Antenna in Wideband for Indoor Wi-Fi Communication Open
This paper investigates the radiation characteristics of tilted-branch comb structures and proposes a novel beam-switchable antenna design capable of switching between high-gain horizontal omnidirectional and vertical directional end-fire …
View article: The Enhancement in Optical Characteristics of Nano-Antenna Arrays through Addition of Inverse Active Core–Shell Nanoparticles in the Array Element
The Enhancement in Optical Characteristics of Nano-Antenna Arrays through Addition of Inverse Active Core–Shell Nanoparticles in the Array Element Open
We demonstrate analytically the technique and arrangement of nanoparticle antenna arrays with the enhancement of optical characteristics at an optical frequency regime. The optical characteristics of the array are enhanced by introducing a…
View article: The Generalized Principle of Pattern Multiplication and Its Application to Wide-Angle Scanning Array Based on Phase Mode Antenna
The Generalized Principle of Pattern Multiplication and Its Application to Wide-Angle Scanning Array Based on Phase Mode Antenna Open
The generalized principle of pattern multiplication (GPPM) and its application to wide-angle scanning array are investigated. It includes the generalized element factor (GEF), generalized array factor (GAF), and their beam match condition.…
View article: The Generalized Principle of Pattern Multiplication and Its Application to Wide-Angle Scanning Array Based on Phase Mode Antenna
The Generalized Principle of Pattern Multiplication and Its Application to Wide-Angle Scanning Array Based on Phase Mode Antenna Open
The generalized principle of pattern multiplication (GPPM) and its application to wide-angle scanning array are investigated. It includes the generalized element factor (GEF), generalized array factor (GAF), and their beam match condition.…
View article: A Novel Low-Profile Phased Antenna With Dual-Port and Its Application in 1-D Linear Array to 2-D Scanning
A Novel Low-Profile Phased Antenna With Dual-Port and Its Application in 1-D Linear Array to 2-D Scanning Open
A novel low-profile phased antenna with dual-port and its two types of 1-D linear array to 2-D space wide-angle beam scanning are proposed. The antenna unit is composed of fishbone structure and rhombus parasitic patch, which is folded int…
View article: An approach to achieve directional low‐profile antenna of quintuple stable pattern band by utilising dipole with compound concave corrugated reflector
An approach to achieve directional low‐profile antenna of quintuple stable pattern band by utilising dipole with compound concave corrugated reflector Open
An approach to achieve directional low‐profile UWB antenna by omnidirectional source with a reflector, is proposed. The general theoretical model about the direction and the phase conditions between the upward and reflected field are devel…
View article: Realization of Multimode OAM Beams with Almost the Same Divergence Angles
Realization of Multimode OAM Beams with Almost the Same Divergence Angles Open
This paper proposes a new method of realizing multimode OAM beams with almost the same divergence angles. The theoretical relationship between the divergence angle of the OAM beam and its radiation source is presented, and the radiation so…
View article: Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior
Core-Shell Nano-Antenna Configurations for Array Formation with More Stability Having Conventional and Non-Conventional Directivity and Propagation Behavior Open
The enhancement of optical characteristics at optical frequencies deviates with the choice of the arrangement of core-shell nanoparticles and their environment. Likewise, the arrangements of core-shell nanoparticles in the air over a subst…
View article: Interface-Induced Near-Infrared Response of Gold-Silica Hybrid Nanoparticles Antennas
Interface-Induced Near-Infrared Response of Gold-Silica Hybrid Nanoparticles Antennas Open
We proposed an IR absorber hybrid nanoantenna comprise of two overlapping gold nanoparticles residing over larger a silica nanoparticle. A wet chemical route was employed to prepare the hybrid structure of nanoantenna. High-resolution tran…
View article: Subwavelength plasmonic nanoantenna as a Plasmonic Induced Polarization Rotator (PI-PR)
Subwavelength plasmonic nanoantenna as a Plasmonic Induced Polarization Rotator (PI-PR) Open
This article reports the finding of the plasmonic induced polarization rotation and propagation rotation when the plane EM wave radiates the adjacent active coated nano particle and large dielectric sphere at resonant frequency. The result…
View article: Circularly-Polarized Shaped Pattern Planar Antenna for Aerial Platforms
Circularly-Polarized Shaped Pattern Planar Antenna for Aerial Platforms Open
Circularly-polarized planar antenna with a shaped pattern for airborne applications, is proposed in this letter. The proposed antenna consists of vertically-polarized formation and horizontally-polarized stubs to provide circularly-polariz…
View article: Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas
Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas Open
Higher order plasmonic resonance modes and their frequency blue shifts in silver-coated silica nanoparticle antennas are studied. Synthesizing them with a wet chemistry method, silica (SiO2) nanoparticles were enclosed within silver shells…
View article: Pattern Reconfigurable Antenna Applying Spoof Surface Plasmon Polaritons for Wide Angle Beam Steering
Pattern Reconfigurable Antenna Applying Spoof Surface Plasmon Polaritons for Wide Angle Beam Steering Open
A pattern reconfigurable antenna based on switchable spoof surface plasmon polaritons (SSPPs) transmission line is experimentally presented. There are two fundamental modes on traditional SSPPs transmission line, the odd mode and the even …
View article: Dual CP Polarization Diversity and Space Diversity Antennas Enabled by a Compact T-Shaped Feed Structure
Dual CP Polarization Diversity and Space Diversity Antennas Enabled by a Compact T-Shaped Feed Structure Open
A compact T-shaped feed structure (IFS) is reported that enables the realization of two types of diversity antennas: a polarization diversity antenna (PDA) and a spatial diversity antenna (SDA). Both systems have a high potential for mobil…
View article: Experiments of Orbital Angular Momentum Phase Properties for Long-Distance Transmission
Experiments of Orbital Angular Momentum Phase Properties for Long-Distance Transmission Open
In this paper, we propose a new method to effectively measure orbital angular momentum (OAM) properties for long-distance transmission. Properties of OAM wavefront in terms of phase and amplitude are measured by rotating the OAM wave anten…
View article: Water metamaterial for ultra-broadband and wide-angle absorption
Water metamaterial for ultra-broadband and wide-angle absorption Open
A subwavelength water metamaterial is proposed and analyzed for ultra-broadband perfect absorption at microwave frequencies. We experimentally demonstrate that this metamaterial shows over 90% absorption within almost the entire frequency …
View article: Gap-Dependent Localized High Energy Multiple Dipolar Modes in Passive Silver-Coated Silica Nanoparticle Antennas
Gap-Dependent Localized High Energy Multiple Dipolar Modes in Passive Silver-Coated Silica Nanoparticle Antennas Open
The gap-induced plasmonic response of metallic nanoparticles drastically changes the near and far-field properties of nanoparticle antenna. Similar to a pair of metallic nanostructures, the two nanoparticles, with a dielectric core and sil…
View article: Multiband coherent perfect absorption in a water-based metasurface
Multiband coherent perfect absorption in a water-based metasurface Open
We design an ultrathin water-based metasurface capable of coherent perfect absorption (CPA) at radio frequencies. It is demonstrated that such a metasurface can almost completely absorb two symmetrically incident waves within four frequenc…
View article: Wideband visible-light absorption in an ultrathin silicon nanostructure
Wideband visible-light absorption in an ultrathin silicon nanostructure Open
We design a new kind of metamaterial absorber in the form of an ultrathin silicon nanostructure capable of having wideband absorption of visible light. We show that our metamaterial can exhibit almost perfect absorption of incident light e…
View article: Omnidirectional Circularly Polarized Antenna with High Gain in Wide Bandwidth
Omnidirectional Circularly Polarized Antenna with High Gain in Wide Bandwidth Open
A novel omnidirectional circularly polarized (CP) slot array antenna with high gain is proposed, which is based on the coaxial cylinder structure, and the orthogonal slots radiated the circular polarization wave around the cylinder. Furthe…
View article: Topological Design of Planar Circularly Polarized Directional Antenna with Low Profile Using Particle Swarm Optimization
Topological Design of Planar Circularly Polarized Directional Antenna with Low Profile Using Particle Swarm Optimization Open
A topological method for the design and optimization of planar circularly polarized (CP) directional antenna with low profile was presented. By inserting two parasitic layers, generated by particle swarm optimization, between the equiangul…
View article: MoS$_2$ Broadband Coherent Perfect Absorber for Terahertz Waves
MoS$_2$ Broadband Coherent Perfect Absorber for Terahertz Waves Open
We present a comprehensive analysis of terahertz waves propagation through a bulk MoS crystal slab. It is shown that broadband coherent perfect absorption can be achieved and the coherent absorptivity can be adjusted from 1.57% to 99.97% b…
View article: Broadband Dual Circularly Polarized Magnetoelectric Dipole Antenna Fed by a Miniaturized Six-Branch Hybrid Coupler
Broadband Dual Circularly Polarized Magnetoelectric Dipole Antenna Fed by a Miniaturized Six-Branch Hybrid Coupler Open
A broadband dual circularly polarized magnetoelectric dipole antenna (MEDA) fed by a miniaturized six-branch hybrid coupler (SBHC) is presented in this paper. First, a dual linearly polarized MEDA with a bandwidth of 73.3% is developed bas…
View article: Designs and Performance Characteristics of Coated Nanotoroid Antennas
Designs and Performance Characteristics of Coated Nanotoroid Antennas Open
The electromagnetic properties of a toroidal coated nanoparticle (T-CNP) antenna with an active core (doped with rare earth erbium Er 3+ ions) are investigated. It is demonstrated that the active T-CNP acts as a strong dipole radiator at i…