Article
Engineering, Electrical & Electronic
Xiangyu Jin, Shaobin Liu, Yuning Yang, Yonggang Zhou
Summary: A novel frequency-reconfigurable solid-state plasma chip antenna based on plane slot is proposed, which can achieve cross-band frequency switching and exhibits prominent reconstruction characteristics. It offers high integration compared with traditional reconfigurable antennas.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Xuan Yi, Hang Wong
Summary: This article presents a novel folded horn-fed open slot antenna with wide bandwidth and high gain for millimeter-wave applications. The antenna has a three-layer planar structure and is designed with differentially fed excitations. It achieves a wide impedance bandwidth and stable radiation patterns.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Ken Paramayudha, Shengjian Jammy Chen, Withawat Withayachumnankul, Christophe Fumeaux
Summary: This paper introduces a concept of a frequency-reconfigurable circularly polarized antenna with omnidirectional radiation characteristics. The antenna achieves omnidirectional circular polarization through two orthogonal radiators and is empowered with reconfigurability through varactor-loaded slots. The antenna demonstrates a wide CP tuning range and stable omnidirectional patterns.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Sirous Bahrami, Gholamhosein Moloudian, Ho-Jin Song, John L. Buckley
Summary: This paper proposes a tunable circularly polarized antenna with a reconfigurable integrated feed network for cognitive radio applications. The feed network consists of an ultrawideband bandpass filter, a tunable T-shaped resonator, and an L-shaped microstrip line. The antenna achieves wideband and narrowband operation modes, providing flexibility for different applications in cognitive radio systems.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Quoc Hung Dang, Shengjian Jammy Chen, Damith Chinthana Ranasinghe, Christophe Fumeaux
Summary: This letter presents a dual-band frequency-reconfigurable flexible textile and foam antenna with independent tunability. The antenna operates simultaneously in a TMz0(0.5)0 mode and a higher order mode at the 2.45 and 5.8 GHz bands. It has a relative frequency tuning range of 41.1% at the lower band and 29.9% at the higher band. The fabricated antenna prototype maintains robust performance in various bending configurations, suggesting its practicality for wearable applications.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Tang-Jing Li, Guang-Ming Wang, Wen-Long Guo, Ke-Wei Xin, Jia-Qi Han, Hai-Peng Li
Summary: This letter presents a reconfigurable folded transmitarray antenna (RFTA) with a fully planar structure, consisting of an electronically reconfigurable metasurface and a polarization rotating metasurface (PRMS). The RFTA prototype with 12 x 12 elements is designed, fabricated, and measured, showing a gain of 13.4 dBi at 5.8 GHz and a two-dimensional beam scanning angle of +/- 60 degrees. This work significantly reduces the antenna profile compared to the traditional reconfigurable transmitarray antenna (RTA), making it a promising candidate for wireless communication systems with limited space.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Luca Santamaria, Fabien Ferrero, Robert Staraj, Leonardo Lizzi
Summary: This article proposes a slot-based electronically steerable parasitic array radiator (ESPAR) antenna suitable for Internet-of-Things (IoT) applications, which can provide 12 directive and two omnidirectional radiation states with the use of diodes for reconfiguration. The design, implementation, and effects of real electronic components on antenna performance are discussed in detail. The effectiveness of the antenna is evaluated both numerically and experimentally.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Quoc Hung Dang, Nghia Nguyen-Trong, Shengjian Jammy Chen, Christophe Fumeaux
Summary: This study proposes a pattern-reconfigurable flexible textile antenna that covers the 2.45-GHz ISM band. The design uses RF-switch integrated circuits packaged into reconfiguration modules to switch between the omnidirectional and broadside radiation modes. Analytical models are developed to calculate the resonance frequency of each mode, providing insights and assisting the design optimization. The experimental characterization of an antenna prototype validates the concept and analysis, demonstrating its stable performance in on-body environments and various bending test conditions in wearable scenarios.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Optics
Haifan You, Haiping Wang, Weike Luo, Yiwang Wang, Xinghua Liu, Zhenguang Shao, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng
Summary: We report high-performance Al0.1Ga0.9N p-i-n ultraviolet (UV) avalanche photodiodes (APDs) based on sapphire substrates. A two-step deposition method was used to reduce plasma damage while maintaining high-quality dielectric film. The devices show stable breakdown voltages, low dark current densities, and high avalanche gains. The suppression of surface leakage current and elimination of edge breakdown are confirmed through uniform electroluminescence distributions and emission spectra measurements.
Article
Engineering, Electrical & Electronic
Lei Sang, Shuaitao Li, Bin Hu, Kehan Dai, Mark Kraman, Hong Yang, Wen Huang
Summary: This article describes the design process of stretchable microstrip patch antennas on PDMS soft substrates. The stretchability of the materials leads to changes in both physical dimensions and electrical parameters compared to antennas on rigid substrates. By incorporating deformation parameters into the design equations, the reconfigurable antennas can work at multiple frequency points using an optimization algorithm. A demonstration patch antenna on PDMS was designed, fabricated, and measured, showing similar electrical performance as predicted by finite-element method modeling.
IEEE ANTENNAS AND PROPAGATION MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Shuting Tan, Yu Xiao, Yuxing Liu, Zhixi Liang, Yuanxin Li, Shiyou Xu
Summary: A pattern reconfigurable antenna with vertical polarization is proposed, using two folded near-coupled slot antennas. By designing a central feeding structure and a reconfigurable feeding strip based on the current reverse principle with p-i-n diodes, two endfire beams and a bidirectional beam can be achieved. A prototype is fabricated and measured to validate the design, obtaining three high-quality radiation beams. In the two endfire states, the measured peak gain can reach 7.15 dBi with a front-to-back ratio of more than 22 dB at 5.7 GHz, while in the bidirectional state, the measured peak gain can reach 3.94 dBi with an F/B ratio of less than 0.3 dB.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Computer Science, Information Systems
Nima Javanbakht, Rony E. Amaya, Jafar Shaker, Barry Syrett
Summary: A novel fixed frequency beam-steering leaky-wave antenna is presented, which utilizes GaAs varactor diodes for electronic beam-steering capability. Experimental validations were performed to prove the validity of the proposed design.
Article
Engineering, Electrical & Electronic
Kamil Yavuz Kapusuz, Sam Lemey, Hendrik Rogier
Summary: A novel single-feed ultrawideband cavity-backed slot antenna with reconfigurable polarization capability is demonstrated using AFSIW technology. The antenna achieves an ultrawide impedance bandwidth and supports four switchable linear polarization states by leveraging p-i-n diodes. Dynamic polarization reconfiguration is achieved through a simple bias network, resulting in stable performance across the operating bandwidth.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Energy & Fuels
B. R. Sanjeeva Reddy, Naresh K. Darimireddy, Chan-Wang Park, Abdellah Chehri
Summary: A novel frequency slot-based switchable antenna suitable for Bluetooth, WiMAX, and WLAN applications was presented in this article. By optimizing the antenna structure, compact size and switchable radiations were achieved.
Article
Computer Science, Information Systems
Saeed Haydhah, Ryan Gold, Zhiyong Dong, Fabien Ferrero, Leonardo Lizzi, Mohammad S. Sharawi, Ahmed A. Kishk
Summary: A new compact multifunctional pattern reconfigurable 2x2 antenna array at 3.65 GHz with high gain and 16 MIMO modes is proposed. The array consists of single-element antennas with U-slots etched on the ground plane and fed using a reconfigurable feeding network. The antenna array achieves high efficiency, peak gain, and impedance-bandwidth, making it suitable for small cell base-station applications.
