A5000673554- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Advanced Antenna and Metasurface Technologies
- Acoustic Wave Resonator Technologies
- Antenna Design and Optimization
- Advanced MEMS and NEMS Technologies
- Internet Traffic Analysis and Secure E-voting
- Millimeter-Wave Propagation and Modeling
- Crystallization and Solubility Studies
- Photonic and Optical Devices
- Network Security and Intrusion Detection
- Ferroelectric and Piezoelectric Materials
- X-ray Diffraction in Crystallography
- Metamaterials and Metasurfaces Applications
- Energy Harvesting in Wireless Networks
- Advanced MIMO Systems Optimization
- Microwave Dielectric Ceramics Synthesis
- Advanced Materials and Mechanics
- Semiconductor Lasers and Optical Devices
- Radio Frequency Integrated Circuit Design
- Ultrasonics and Acoustic Wave Propagation
- Mechanical and Optical Resonators
- Microwave and Dielectric Measurement Techniques
- Advanced Malware Detection Techniques
- Security and Verification in Computing
University of Central Florida
2016-2025
Tongji Hospital
2025
Huazhong University of Science and Technology
2020-2025
Gillette Children's Specialty Healthcare
2024
Southwest Jiaotong University
2011-2024
Antea Group (France)
2024
Frontier Science Foundation-Hellas
2024
Long Island University
2024
Alpha Omega Electromagnetics (United States)
2024
Institute of Electrical and Electronics Engineers
2024
A novel synthesis technique to integrate high- <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> 3-D filters with highly efficient slot antennas is presented in this paper. This allows for compact integration of and very high antenna efficiency significantly reduced form factor integrated RF front ends. Prototype four-pole Chebyshev cavity are demonstrated at xmlns:xlink="http://www.w3.org/1999/xlink">X</i> -band using both coaxial coplanar...
A seamless integration of 3-D vertical cavity filters with highly efficient slot antennas is presented herein. This technique enables low-loss filtering and reduces co-site interference within phased arrays. two-pole filter integrated a antenna demonstrated at <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> band. The center frequency fractional bandwidth the filter/antenna system are 10.16 GHz 3.0%, respectively. Due to near-zero transition...
A novel wireless temperature sensor is presented herein for high-temperature applications. This robust in harsh environments using stable materials and purely passive structures. The resonant frequency of the determined by temperature-dependent dielectric constant substrate material. can be wirelessly detected sensing sensor. integration resonator antenna enables realization low-profile compact sensors. Measured decreases from 5.12 to 4.74 GHz when increases 50°C 1000°C. corresponds a...
A new approach to parasitic phased-array antennas is presented. symmetric two-layer, single-input inexpensive three-element array at 1-GHz employing varactors as tuning mechanisms are designed, fabricated, and measured. The driven element mutually coupled two elements in the H-plane. used control mutual coupling beam scanning maintain resonance 1 GHz. continuous range of -15 + 15° measured with maintained impedance matching radiation pattern integrity. low cost diode varactors, place...
A frequency-reconfigurable slot-ring antenna switching between L- and C-bands is presented. The aperture of an L-band can be reconfigured to a 2 × C -band array by changing the states 16 p-i-n diode switches. This operates at 1.76/5.71 GHz with fractional bandwidth 8.6%/11.5% in L/ C-band operating states, respectively. measured realized gain radiation efficiency are 0.1/4.2 dBi 66.6%/80.7%, element spacing 5.71 0.36λ0, which enables beamsteering without grating lobes. shared-aperture...
A key challenge in censorship-resistant web browsing is being able to direct legitimate users redirection proxies while preventing censors, posing as insiders, from discovering their addresses and blocking them. We propose a new framework for called CensorSpoofer that this by exploiting the asymmetric nature of traffic making use IP spoofing. de-couples upstream downstream channels, using low-bandwidth indirect channel delivering outbound requests (URLs) high-bandwidth downloading content....
A third-order substrate integrated waveguide (SIW) filter/antenna is presented in this letter. The composed of two cavity resonators with a slot antenna the second cavity. excites modes cavity, creating filtering response while preserving radiating characteristics. transmission zero can be arbitrarily placed below or above passband. operates at center frequency 3.71 GHz and has an 8.29% fractional bandwidth 5.10 dBi gain.
A laser-based layer-by-layer additive process, stereolithography, is used to create truly three-dimensional (3-D) structures for high-frequency applications. High aspect-ratio complicated 3-D embedded inside of a package are created by this process. Previously, Q's greater than 3000 and tolerances /spl sim/0.19% have been achieved resonators. In paper, more applications demonstrated. Particular examples include the integration nonplanar monopole antenna coupled high-Q cavity with only 0.26%...
In this letter, a low-cost patch antenna phased array is demonstrated with analog beam steering without using phase shifters. This novel technique can greatly reduce the cost of phased-array system and will enable wide-scale deployment arrays in low-end commercial products. presented three-element array, center (driven) fed by an RF source two neighboring (passive) antennas are excited through mutual coupling from antenna. The shifts between elements achieved changing reactance capacitors...
A reconfigurable dual-polarized slot-ring antenna/ array, switching between Sand C-band with wide bandwidth in each operating state is presented. By simultaneously eight p-i-n diode switches, a 2 × antenna array can be reconfigured to an S-band unit cell, and vice versa. Fractal shapes are incorporated into the structure significantly enhance bandwidth. In S-/C-band state, this shows 69.1%/58.3% fractional measured maximum realized gain of 2.4/3.1 dBi. For 2×2 spacing elements less than 0.5...
Directly coupling antennas to filters can remove the transition loss between two and reduce size of radio frequency front ends. Circularly polarized (CP) patch with a single feed are very popular in many applications due their compact ease design. However, probe-fed CP antenna typically exhibits only 1%-2% useful fractional bandwidth by considering both impedance matching axialratio (AR) bandwidths. Thick substrates were used realize single-feed wider bandwidth. thick may cause issues, such...
Wireless passive temperature sensors for harsh-environment applications based on cylindrical microwave cavity resonators are presented herein. Slot antennas integrated with zero additional volume. The resonant frequencies of the determined by dielectric constants ceramic materials, which monotonically increase versus temperature. Silicoboron carbonitride (SiBCN) very robust inside harsh environments featuring high temperatures and corrosive gases, optimized in this paper to reduce losses...
In this article, a 7×7 reconfigurable reflectarray operating at X- band is proposed and experimentally verified. The consists of linearly polarized, dual-resonance, tunable unit cells fabricated on single layer. Reconfigurability achieved by loading each dual-resonance cell with four varactors; the two resonances provide phase range greater than 360°. design utilized in analyzed using full-wave Floquet simulations. A biasing network supporting individual array element designed, allowing...
Aquaculture, the fastest growing food production sector cannot continue to rely on finite stocks of marine fish as primary source omega-3 (n-3) long-chain polyunsaturated fatty acids (LC-PUFA), eicosapentaenoic acid (EPA; 20:5n3) and docosahexaenoic (DHA; 22:6n-3), for feeds. A four-month feeding trial was conducted investigate impact a de novo oil, with high levels EPA DHA, obtained from transgenic Camelina sativa growth performance, tissue profiles, expression lipid metabolism genes when...
Alcoholic liver disease (ALD) is a serious worldwide health problem. Ginsenoside Rc major active ingredient isolated from Panax ginseng, whose pharmacological effects counteract oxidative stress, inflammation, and lipid accumulation. However, it still unclear whether ginsenoside might exert beneficial on alcohol-induced injury. To this aim, mice primary hepatocytes (MPHs) were challenged with alcohol to test Rc's their intracellular metabolism. C57BL/6J or SIRT6alb-/- chronically fed diet...
Left–right (LR) asymmetry disorders present a complex etiology, with genetic factors emerging as primary contributor. This study aims to explore the underpinnings of chromosomal variants and individual genes in fetuses afflicted prenatal LR disorder. Through retrospective analysis conducted between 2020 2023 at Tongji Hospital, Huazhong University Science Technology, outcomes asymmetric disorder were scrutinized utilizing copy number variation sequencing (CNV-seq) whole exome (WES)...
Abstract To improve the service life of high-speed steel tools, this paper studies influence laser treatment on wear resistance, hardening layer depth, and hardness tools. The results show that power, lap rate, scanning speed tools is from large to small. Laser surface can after about 922 HV, non-laser 418 0.5 times higher than hardening. After quenching, resistance has also been improved, rate quenching 0.0023% 0.001% lower 0.0033%, mechanism mainly abrasive wear. there are three areas...
Integration of high-quality (Q)-factor cavity filters with high-efficiency slot antennas for array applications is presented in this letter. This proposed integration technique exhibits near-zero transition loss between the filter and antenna, therefore improves total efficiency filter/antenna system. The antenna are vertically integrated to reduce footprint that necessary applications. fabricated unit cell has a center frequency 10.07 GHz bandwidth 5.5%. Using structure, 2 × designed,...
Recent work has shown that traffic analysis of data carried on encrypted tunnels can be used to recover important semantic information. As one example, attackers find out which website, or page a user is accessing simply by monitoring the patterns. We show much greater threat privacy than previously thought, as such attacks remotely. In particular, we that, perform analysis, adversaries do not need directly observe Instead, they send probes from far-off vantage point exploit queuing side...