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View article: A Solar Cell Compatible Super-Wideband Flexible Transparent Antenna with Enhanced Axial Ratio
A Solar Cell Compatible Super-Wideband Flexible Transparent Antenna with Enhanced Axial Ratio Open
A super-wideband transparent antenna (SWTA) with wide axial ratio bandwidth (ARBW) featuring an enhanced ground plane and microstrip feeding is proposed. The antenna has planar dimensions of 0.20λ0 × 0.20λ0 × 0.003λ0 at its lowest frequenc…
View article: Slot-Coupled Fed 256-Element Planar Microstrip Array with Beam Stability for K-Band Water Level Sensing
Slot-Coupled Fed 256-Element Planar Microstrip Array with Beam Stability for K-Band Water Level Sensing Open
Radar-based water-level monitoring requires antennas with narrow beams, high gain, and low sidelobes. Existing horn and series-fed microstrip arrays either lack compactness or suffer from frequency-dependent beam deviation that reduces sen…
View article: Predicting Final Properties in Ibuprofen Production with Variable Batch Durations
Predicting Final Properties in Ibuprofen Production with Variable Batch Durations Open
This study addresses the challenge of predicting final properties in batch processes with highly uneven durations, using the ibuprofen production process as a case study. Novel methodologies are proposed and compared against traditional re…
View article: Feasibility Study on the Medium-Low-Speed Maglev Power Supply of DC 3-kV System Considering Train Acceleration
Feasibility Study on the Medium-Low-Speed Maglev Power Supply of DC 3-kV System Considering Train Acceleration Open
The DC (direct-current) 750V or DC 1500V power supply systems is currently adopted for the medium-low-speed (MLS) maglev, achieving a maximum train operational speed of 140 km/h.There are plans to increase this speed to between 160~200 km/…
View article: Altered static and dynamic functional brain network in knee osteoarthritis: A resting-state functional magnetic resonance imaging study
Altered static and dynamic functional brain network in knee osteoarthritis: A resting-state functional magnetic resonance imaging study Open
This study aimed to investigate altered static and dynamic functional network connectivity (FNC) and its correlation with clinical symptoms in patients with knee osteoarthritis (KOA). One hundred and fifty-nine patients with KOA and 73 age…
View article: Compact Four-Port Waveguide Circulator Using Discrete Ferrites for Injection-Locking Magnetron System
Compact Four-Port Waveguide Circulator Using Discrete Ferrites for Injection-Locking Magnetron System Open
A compact high-power four-port circulator aiming to simplify the conventional, complex, and bulky injection-locking magnetron system is proposed. To reduce the performance deterioration and the risk of ferrite rupture under long-term high-…
View article: Compact Slot Microstrip Patch Antenna Loaded with Open Metal Cavity for Microwave Hyperthermia
Compact Slot Microstrip Patch Antenna Loaded with Open Metal Cavity for Microwave Hyperthermia Open
Cancer is a significant disease that often results in severe side effects from traditional treatments. Microwave hyperthermia has emerged as a minimally invasive, highly effective, and low‐toxicity treatment option that has gained widespre…
View article: Mitigating Thermal Focusing in Microwave Heating of Cylindrical Loads by Resonant Rings
Mitigating Thermal Focusing in Microwave Heating of Cylindrical Loads by Resonant Rings Open
Cylindrical loads are commonly found in microwave heating. However, cylindrical loads tend to have a thermal focus, leading to uneven microwave heating. In this paper, a novel microwave heating method was proposed by employing resonant rin…
View article: Superdirective Wideband Array of Circular Monopoles with Loaded Patches for Wireless Communications
Superdirective Wideband Array of Circular Monopoles with Loaded Patches for Wireless Communications Open
A wideband superdirective array, composed of a two-element circular monopole configuration, is introduced. The monopoles are placed in close proximity, facing each other on a metal ground. To ensure good matching at high frequencies, two p…
View article: Design of a Microwave Heating and Permittivity Measurement System Based on Oblique Aperture Ridge Waveguide
Design of a Microwave Heating and Permittivity Measurement System Based on Oblique Aperture Ridge Waveguide Open
In this paper, an oblique aperture ridge waveguide operating at 2450 MHz is proposed, and, using the ridge waveguide, a permittivity measurement system is constructed which can measure the permittivity of materials during microwave heating…
View article: Microwave-Driven Electrodeless Ultraviolet Lamp Based on Coaxial Slot Radiator
Microwave-Driven Electrodeless Ultraviolet Lamp Based on Coaxial Slot Radiator Open
Microwave-driven electrodeless ultraviolet (UV) lamps have the advantages of high efficiency and high power. However, the conventional microwave system is slightly oversized, which restricts the use of the lamp in a narrow space. A miniatu…
View article: Simultaneous Achievement of High-Yield Hydrogen and High-Performance Microwave Absorption Materials from Microwave Catalytic Deconstruction of Plastic Waste
Simultaneous Achievement of High-Yield Hydrogen and High-Performance Microwave Absorption Materials from Microwave Catalytic Deconstruction of Plastic Waste Open
Here, FeAlOx catalytic deconstruction of polyethylene in a domestic microwave oven is reported. With the starting weight ratio of FeAlOx to polyethylene at 1:1, the concentration and yield of H2 reach up to 67.85 vol% and 48.1 mmol g−1plas…
View article: Power Changes of Electromagnetic Waves Across the Temporal Boundary in Simple Polar-Molecule Reactions
Power Changes of Electromagnetic Waves Across the Temporal Boundary in Simple Polar-Molecule Reactions Open
Microwave-assisted chemical reactions have been widely used, but the inhomogeneous heating limits further applications. The aim of this paper is to investigate the power transfer behavior in the simple polar-molecule reactions whose polari…
View article: EFFICIENT BROADBAND POWER AMPLIFIER USING KLOPFENSTEIN TAPER AS OUTPUT MATCHING NETWORK
EFFICIENT BROADBAND POWER AMPLIFIER USING KLOPFENSTEIN TAPER AS OUTPUT MATCHING NETWORK Open
An efficient 0.6-4.2GHz GaN-HEMT power amplifier based on Klopfenstein taper is proposed in this letter.A method based on source-pull/load-pull simulation has been used to find the optimum source and load impedances across the broad band.T…
View article: Substrate integrated waveguide omnidirectional filtering antenna with a controllable radiation null for 5.8 <scp>GHz WiFi</scp> application
Substrate integrated waveguide omnidirectional filtering antenna with a controllable radiation null for 5.8 <span>GHz WiFi</span> application Open
A filtering antenna composed of a monopole and two stacked circular substrates integrated waveguide (SIW) cavity for 5.8 GHz WiFi application is proposed in this letter. Cross-coupling between the feeding probe and the second SIW cavity re…
View article: Microwave-Boosted One-Step Synthesis of Nanocrystal N-Doped 2D Carbon/Ni Composite with High Electromagnetic Absorption Performance
Microwave-Boosted One-Step Synthesis of Nanocrystal N-Doped 2D Carbon/Ni Composite with High Electromagnetic Absorption Performance Open
As the problems of electromagnetic pollution and interference are becoming increasingly serious, the development of electromagnetic absorption materials with a high absorption capacity and broad absorption bandwidth are stringently needed.…
View article: Research on Dry Microwave Heating Infectious Aerosols or Droplets on Respirators
Research on Dry Microwave Heating Infectious Aerosols or Droplets on Respirators Open
Dramatic shortages of filtering facepiece respirator supplies generally occur following the outbreak of a pandemic such as COVID-19. Here, the decontamination and reuse of respirators are considered. Among decontamination methods, microwav…
View article: The influence of gas humidity on the discharge properties of a microwave atmospheric-pressure coaxial plasma jet
The influence of gas humidity on the discharge properties of a microwave atmospheric-pressure coaxial plasma jet Open
This paper investigated the influence of gas humidity (1%, 3%, 8%, 10%, and 12%) on the characteristics of a microwave-induced atmospheric plasma jet. The plasma discharge was generated by a microwave solid-state source with a H2O–Ar mixtu…
View article: A self-boosting microwave plasma strategy tuned by air pressure for the highly efficient and controllable surface modification of carbon
A self-boosting microwave plasma strategy tuned by air pressure for the highly efficient and controllable surface modification of carbon Open
Microwave enabled air plasma was boosted by a carbon fiber cloth (CFC) and used for the high-efficiency surface modification of the CFC, yielding CFCs with tunable contents of oxygen and each O-containing group.
View article: Metallic and dielectric hybrid 3D printed K‐band dielectric‐loaded antenna with reduced sidelobe
Metallic and dielectric hybrid 3D printed K‐band dielectric‐loaded antenna with reduced sidelobe Open
A K‐band (18–27 GHz) dielectric‐loaded waveguide antenna is designed as the feed for a parabolic reflector. The antenna is composed of a waveguide launcher and a dielectric load. The waveguide launcher is fabricated by selective laser melt…
View article: Butyltin compounds in fishes commonly sold in Taiwan markets
Butyltin compounds in fishes commonly sold in Taiwan markets Open
Fishes commonly consumed in Taiwan were purchased from four fish markets at seasonal intervals in 2006 in order to monitor the butyltin residues, including monobutyltin (MBT), dibutyltin (DBT), tributyltin (TBT), and tetrabutyltin (TeBT), …
View article: Special Issue on “Microwave Applications in Chemical Engineering”
Special Issue on “Microwave Applications in Chemical Engineering” Open
Microwave heating has been widely used in the chemical industry because of its advantages, such as fast heating rate, selective and controllable heating, increasing reaction rate and reducing by-products in chemical reactions. The Special …
View article: SIW filter with broadband stopband by suppressing the coupling of higher‐order resonant modes
SIW filter with broadband stopband by suppressing the coupling of higher‐order resonant modes Open
This Letter presents a third‐order multilayer substrate integrated waveguide (SIW) filter with broadband stopband. The filter is composed of three vertically stacked square SIW cavities. The input/output feeding structure and the coupling …
View article: A novel side-channel analysis for physical-domain security in cyber-physical systems
A novel side-channel analysis for physical-domain security in cyber-physical systems Open
Security of cyber-physical systems against cyber attacks is an important yet challenging problem. Cyber-physical systems are prone to information leakage from the physical domain. The analog emissions, such as magnetic and power, can turn …
View article: CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile
CPW-fed circularly-polarized antenna array with high front-to-back ratio and low-profile Open
A novel design of a coplanar waveguide (CPW) feed antenna array with circular polarization (CP) and a high front-to-back ratio is described. The proposed CP array is achieved by using a compact CPW–slotline transition network etched in the…
View article: Simulation and Analysis of Oleic Acid Pretreatment for Microwave-Assisted Biodiesel Production
Simulation and Analysis of Oleic Acid Pretreatment for Microwave-Assisted Biodiesel Production Open
Oleic acid needs to be heated when it is utilized for biodiesel production, but, as a low-loss solution, oleic acid is difficult to heat by microwave. An efficient heating method for oleic acid is designed. A high loss material porous medi…
View article: An Interdigital Electrode Probe for Detection, Localization and Evaluation of Surface Notch-Type Damage in Metals
An Interdigital Electrode Probe for Detection, Localization and Evaluation of Surface Notch-Type Damage in Metals Open
Available microwave notch-type damage detection sensors are typically based on monitoring frequency shift or magnitude changes. However, frequency shift testing needs sweep-frequency data that make scanning detection becomes difficult and …