Article
Computer Science, Information Systems
Theodoros N. Kapetanakis, Christos D. Nikolopoulos, Konstantinos Petridis, Ioannis O. Vardiambasis
Summary: Textile patch antennas of various shapes and materials were designed and fabricated with optimized characteristics for wearable applications, demonstrating excellent performance.
Article
Physics, Multidisciplinary
Hui Gu, Lei Ge, Jihong Zhang
Summary: This paper presents a reconfigurable circular-ring feed patch antenna for polarization diversity applications, achieved through p-i-n diodes to switch between 45 degrees linear polarization, left-hand circular polarization, and right-hand circular polarization. The prototype matches simulations well and successfully demonstrates the three polarization states, making it a promising candidate for future wireless systems.
FRONTIERS IN PHYSICS
(2021)
Article
Physics, Applied
Li Shao, Xinyue Tang, Yujie Yang, Dacheng Wei, Yuanchang Lin, Guotian He, Dapeng Wei
Summary: With the development of wireless technology and flexible electronics, flexible frequency reconfigurable antennas are being widely used as sensors for detecting mechanical signals. This study introduces a flexible force sensitive frequency reconfigurable microstrip antenna fabricated with silver fiber conductive fabric. By incorporating an elastic dielectric layer with a microhemispheric array, the frequency band width of the reconfigurable antenna is extended. The antenna demonstrates high sensing sensitivity and can be used as a strain sensor for measuring human finger bending angle and movements.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Analytical
Franck Kimetya Byondi, Youchung Chung
Summary: This study presents the design of a 920 MHz UHF RFID conductive fabric tag antenna, measuring the DC resistance and impedance of the fabric to calculate conductivity, and simulating different tag designs to compare results. The fabric tag antennas showed different reading ranges and characteristics, suitable for entrance control systems due to their easy application on other fabrics and clothes.
Article
Engineering, Civil
Xiaoping Zhou, Yihui Fu, Hantao Zhu, Zihao Yu, Shanyong Wang
Summary: A new sensor chip with a frequency reconstruction range of 2.252 GHz similar to 2.450 GHz is designed and fabricated in this paper. By adding a self-designed T-shaped shell and using a liquid metal antenna, the sensor range is expanded to 0 kN similar to 96 kN. Experimental results show that the sensor has good performance and can be used for pressure measurements.
SMART STRUCTURES AND SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Philip Ayiku Dzagbletey, Jae-Young Chung
Summary: This manuscript investigates the use of screen-printed and inkjet-printed conductive fabric antennas. The screen-printed antennas showed optimal radiation performance and were used to develop a new fabric antenna feeding technique. The aperture-fed technique involved a single coaxial cable overlayed on a cut-out slot on the ground layer of the patch antenna. Two antenna models for Bluetooth low energy (BLE) and long-range (LoRa) wireless applications were designed, fabricated, and measured, showing good impedance and radiation performance. The screen-printing procedure and feeding technique are presented in this manuscript.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Analytical
Feng-Xue Liu, Jie Cui, Fan-Yu Meng, Tian-Yu Jiang, Shao-Fei Yan, Shuai Chao, Lei Zhao
Summary: A textile bandwidth-enhanced polarization-reconfigurable half-mode substrate-integrated cavity antenna was designed for wearable applications. A slot was cut out from the patch of a basic textile HMSIC antenna to excite two close resonances to form a wide -10 dB impedance band. Snap buttons were added at the radiation aperture to shift the -10 dB band and allow for reconfiguration of the antenna's polarization.
Article
Nanoscience & Nanotechnology
Esfandiar Pakdel, Julie Sharp, Sima Kashi, Wenli Bai, Mazeyar Parvinzadeh Gashti, Xungai Wang
Summary: Cotton fabrics with superhydrophobic, antibacterial, UV protection, and photothermal properties were developed using Ag/PDMS coatings. The relationship between the fabrics' superhydrophobicity and antibacterial activity against E. coli bacteria was studied, along with the UV protection performance of Ag/PDMS coatings. The content of Ag NPs and PDMS played critical roles in determining the water contact angle on modified fabrics, and increasing the content of Ag NPs boosted the UV protection level of fabrics.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Jiahao Zhang, Ying Liu, Yongtao Jia, Rongqiao Zhang
Summary: This article introduces a low radar cross section (RCS) and high-gain Fabry-Perot (F-P) antenna with reconfigurable scattering beams based on varactor diodes, achieving signal modulation through changing the capacitance. Both experimental and simulated results show promising outcomes for the proposed antenna design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Guo-Ping Gao, Ben-Kai Zhang, Jing-Hang Dong, Zhi-Heng Dou, Zhuo-Qi Yu, Bin Hu
Summary: A novel reconfigurable antenna that operates in both ON- and OFF-body modes is proposed in this study. The antenna achieves omnidirectional and unidirectional radiation by using the TM00 and TM10 mode of a rectangular patch. By cutting a rectangular slot on the patch, the resonance frequency of the unidirectional mode is shifted to a lower frequency, resulting in a smaller antenna size and overlapping impedance bandwidths. Four p-i-n diodes are used for arbitrary switching of the operating mode. The measured results show that the antenna covers the 2.4-GHz ISM band with an overlapped bandwidth of 3.8%, and it maintains stable performance when placed on different parts of the human body. The calculated specific absorption rate (SAR) values meet the standards of the United States and Europe, making the proposed antenna suitable for wearable systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Liza Verma, Isha Karnawal, Vikas Chaudhary, Parveen Kumar, Damanpreet Singh, Rajesh Kumar, Gaurav Sapra, Barnett Cleveland, Shukri Afazov, Paul Felton, Philip Breedon
Summary: This work describes the fabrication of a carbon fabric PDMS-based strain sensor with high flexibility, durability, and sensitivity for monitoring human kinematics. The sensor is made by combining activated carbon fabric and PDMS to form a nanocomposite film. Robust electrodes using snap buttons are introduced to ensure the performance of the flexible sensor. The sensor's material, electrical, and mechanical characteristics are analyzed and discussed, as well as its behavior under varied environmental conditions.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Pengfei Deng, Xuan Li, Yanbin Wang, Zijian He, Wenkai Zhu, Yun Zhang, Gabriella M. Schalm, Tian Li
Summary: This study demonstrates a highly stretchable, ionic, and electronic conductive fabric by utilizing natural nanoscale channels in fibers, confining the electronic conductive material with the cellulose fibers, and decoupling the property degradation of the fiber from deformation using a knitted pattern.
ADVANCED FIBER MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Suresh Kumar Muthuvel, Minakshmi Shaw, Yogesh Kumar Choukiker
Summary: This article introduces a concentric circle compound reconfigurable microstrip antenna, which achieves frequency, polarization, and pattern reconfiguration by adjusting the capacitance values of variable diodes. The experimental results show high gain and stable radiation patterns of the antenna.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Materials Science, Ceramics
Ameen Abdelrahman, Fouad Erchiqui, Mourad Nedil, Brahim Aissa, Mohemed Siaj
Summary: We developed a stretchy and resilient micro-strip antenna using a nanocomposite of PDMS and bentonite clay loaded with silver, copper, and graphene nanoparticles. The characteristics of the nanocomposite were extensively evaluated, including physical, mechanical, thermal, and conductivity properties. The fabricated antenna showed a suitable pattern for cutting-edge applications like military, sensing, and space.
JOURNAL OF ELECTROCERAMICS
(2023)
Article
Engineering, Electrical & Electronic
Chang Jiang You, Shu Han Liu, Jin Xi Zhang, Xi Wang, Qin Yu Li, Guang Qiang Yin, Zhi Guo Wang
Summary: This paper analyzes and designs a frequency- and pattern-reconfigurable 1x4 array antenna, including a reconfigurable feed network, 12 rectangular parasitic patches, and four octagonal patch antennas. Characteristic mode analysis (CMA) is used to study the radiation characteristics of the proposed antenna. By changing the ON-OFF states of 18 p-i-n diodes in the feed network, different combinations of initial current phases are obtained to achieve reconfiguration of five radiation states. Frequency reconfigurability is achieved by loading varactor diodes and parasitic patches. The measured results show that the array pattern can be discretely switched in different directions, and the overlapped relative bandwidth of the five radiation states is more than 22%.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Vikrant Kaim, Neeta Singh, Binod Kumar Kanaujia, Ladislau Matekovits, Karu P. Esselle, Karumudi Rambabu
Summary: This study presents a low RF power receiver that enables wireless power transfer at 2.45 and 5.8 GHz, converting the received power into DC power. Four dual-branch rectifiers were used in power transfer experiments, and the results showed that the RF-DC total power conversion efficiency was 0.51/1.64 mW at 1 W power level.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Jing-Yu Lin, Yang Yang, Sai-Wai Wong, Xiaopeng Li, Lin Wang, Eryk Dutkiewicz
Summary: In this paper, a design of a diplexing in-band full-duplex (IBFD) slot antenna based on the quadruple-mode resonator (QMR) is presented for the first time. By using the QMR as a two-way waveguide diplexer integration, four independent frequency channels are implemented in the antenna. Higher order frequency responses are achieved by cascading QMRs. The antenna integrates filtering, diplexing, orthomode transducing, and radiating functions into a single element.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Engineering, Electrical & Electronic
Jing-Yu Lin, Yang Yang, Sai-Wai Wong, Rui-Sen Chen
Summary: In this article, narrowband and wideband in-band full-duplex (IBFD) filtering antenna arrays (FAAs) using cavity-based high-order modes are investigated. The pairs of degenerate high-order modes in a single cavity resonator, TM1n0 and TMn10 (n is even), are found suitable for the IBFD FAA designs due to their advantages in-phase and same amplitude for each magnetic loop, and modal orthogonality. Two types of full-duplex waveguide arrays, a second-order IBFD FAA and a fifth-order IBFD FAA, were implemented and tested with good performance.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Chemistry, Analytical
Khaled M. M. Morshed, Debabrata K. K. Karmokar, Karu P. P. Esselle
Summary: This article presents two novel antennas for mobile devices, allowing them to access both licensed shared access (LSA) bands and all the long-term evolution (LTE) bands, as well as several other bands. These antennas do not require passive or active lumped elements for input impedance matching. One of the antennas is dual-band, while the other is a wideband antenna. Both antennas show high efficiency in all the mentioned bands and nearly omnidirectional radiation patterns in the mid band. The wideband antenna has been fabricated and tested, demonstrating good wideband performance in a wide frequency range.
Article
Chemistry, Analytical
Madiha Farasat, Dushmantha Thalakotuna, Yang Yang, Zhonghao Hu, Karu Esselle
Summary: 5G requires more connected devices, which is achieved by using multiband antennas in base stations. However, multiband antennas face the challenge of pattern distortions due to surrounding antenna element structures. This study proposes a novel approach to reduce pattern distortion in the lower frequency band by integrating a common-mode suppression circuit with the impedance matching network of the high-band antenna element.
Article
Chemistry, Analytical
Sujan Shrestha, Syed Muzahir Abbas, Mohsen Asadnia, Karu P. Esselle
Summary: A three-dimensional printed wideband prototype (WBP) was proposed to enhance the horn feed source by generating a more uniform phase distribution. The phase variation without the WBP was 163.65°, which decreased to 19.68° after placing the WBP above the feed horn aperture at a ?/2 distance.
Article
Engineering, Electrical & Electronic
Foez Ahmed, Muhammad U. Afzal, Dushmantha N. Thalakotuna, Karu P. Esselle
Summary: This article proposes a new dual-band metascreen (DBM) for polarization independent near-field phase corrections. The DBM is based on quad-layer phase-shifting cells with interlaced slot patterns to cater to different operating frequencies. The article also proposes a dual-band directive antenna using a dual-band metallic, partially reflective surface. Experimental tests of a prototype show excellent radiation performance and a low-profile, lightweight design.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Jianfeng Zhu, Yang Yang, Shaowei Liao, Quan Xue
Summary: This study demonstrates the use of additively manufactured metal-only waveguide-based tri-band and broadband reflectarray antennas. By adjusting the length of waveguide sections and the position of units, the phase-shifting over triple bands can be controlled independently for beam shaping. Additionally, the sharp selectivity of the waveguide allows for achromatic feature in the reflectarrays.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Gang Zhang, Shuai Feng, Yuan Chen, Yang Yang, He Zhu, Xin Zhou, Jiasheng Hong, Wanchun Tang, Jiquan Yang
Summary: In this article, a new method is proposed for designing single-and dual-band filtering rat-race couplers based on hemispherical cavities. Two types of multiplexing multimode topologies are constructed in dual-cavity configurations, enabling both single-and dual-band operation. By accurately placing the internal coupling slots and input-output ports, desired filtering responses and phase requirements can be achieved. Two prototypes are successfully implemented using 3-D-printing technology, displaying advantages such as compact size, high Q-factor, lightweight, controllable bandwidths and center frequencies, good phase difference characteristics, and flexible extendable topologies.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Optics
Jianfeng Zhu, Mengze Li, Jiexin Lai, Yang Yang
Summary: This work demonstrates a polarization-maintaining metasurface for spin-decoupled beam shaping using multimaterial additive manufacturing. The wavefronts of LHCP and RHCP can be independently controlled while maintaining the same spin state.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Analytical
Khaled M. Morshed, Debabrata K. Karmokar, Karu P. Esselle, Ladislau Matekovits
Summary: In this paper, a one-dimensional pattern reconfigurable leaky-wave antenna (LWA) was developed for wireless terminals. By selecting the feed points, the antenna can switch the beam in three different directions. Two of these antennas were placed at right angles to achieve two-directional beam switching, which allows the beam to point in five different directions.
Article
Chemistry, Analytical
Khushboo Singh, Mondeep Saikia, Karthick Thiyagarajan, Dushmantha Thalakotuna, Karu Esselle, Sarath Kodagoda
Summary: This paper proposes a reconfigurable intelligent surface (RIS) that can dynamically switch the transmission and reflection phase of electromagnetic waves, realize dual-beam or quad-beam, and convert the polarization of the transmitted beam. When integrated with sensing elements, it can perform joint detection and communication functions in future wireless sensor networks. The capabilities of the RIS in manipulating the dynamic field scattering are validated through experiments and simulations.
Proceedings Paper
Engineering, Electrical & Electronic
Zhiwei Yin, Yang Yang
Summary: A low-profile dual-polarized patch antenna for millimeter-wave (mmWave) applications is introduced. Characteristic mode analysis was used to identify two orthogonal modes that excite the driving patch and the 2x2 patch array. Through the regulation of coupling between the top 2x2 radiator and the middle driving patch using through-holes, the proposed antenna achieves suitable operating bandwidth and a low profile.
2023 5TH AUSTRALIAN MICROWAVE SYMPOSIUM, AMS
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Foez Ahmed, Khushboo Singh, Karu P. Esselle, Dushmantha Thalakotuna
Summary: This paper reviews the potential of near-field metallic metasurfaces (MMs) in developing high-performance antenna systems. The proposed MMs, based on near-field phase translation, are used to enhance gain and steer the beam in a large 3D conical space. The dielectric-free, low-cost, and lightweight properties of MMs make them suitable for usage in strict operating conditions.
2023 5TH AUSTRALIAN MICROWAVE SYMPOSIUM, AMS
(2023)
Article
Chemistry, Multidisciplinary
Lei Ding, Chaohao Chen, Xuchen Shan, Baolei Liu, Dajing Wang, Ziqing Du, Guanshu Zhao, Qian Peter Su, Yang Yang, Benjamin Halkon, Toan Trong Tran, Jiayan Liao, Igor Aharonovich, Min Zhang, Faliang Cheng, Lan Fu, Xiaoxue Xu, Fan Wang
Summary: Multiplexing is of great significance in biology, medicine, and microscopic imaging. A new approach is introduced using the optical nonlinearity of lanthanide-doped upconversion nanoparticles (UCNPs) for super-resolved multiplexing microscopy. By applying a vortex beam, imaging resolution is enhanced and UCNPs are differentiated based on their distinctive nonlinearities. This enables a complementary dimension to spectral, temporal, and polarized dimensions for nanoscale multiplexing.
ADVANCED MATERIALS
(2023)
