Article
Computer Science, Information Systems
Ming Xu, Jingwei Zhang
Summary: This paper presents a circularly polarized multiple-input multiple-output dielectric resonator antenna for 5G millimeter-wave applications. The antenna achieves wideband impedance and optimized axial ratio performance through the use of modified cross slots and complementary split ring resonators.
Article
Engineering, Electrical & Electronic
Bing Zhang, Jian Ren, Yu-Xiang Sun, Ying Liu, Yingzeng Yin
Summary: This paper presents a four-port cylindrical pattern diversity and polarization-diversity dielectric resonator antenna (DRA) for MIMO applications. The design utilizes degenerate modes of the cylindrical DRA to achieve efficient mode excitation and utilization of diversity. The performance of the design is verified through simulation, fabrication, and measurement, and the indoor communication performance is evaluated.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Computer Science, Information Systems
Sumer Singh Singhwal, Ladislau Matekovits, Binod Kumar Kanaujia
Summary: A glueless compact dual port dielectric resonator antenna for X-band applications is proposed in this paper. The prototype is fabricated using RT Duroid substrate and Eccostock-made DRA. The DRA is excited by aperture coupled feeds with symmetry between the ports. Additional mechanical stability is provided by four cylindrical copper rods and four strips used to fix the DRA on the substrate. Impedance matching and bandwidth widening are achieved using eight copper strips. The antenna exhibits a measured impedance bandwidth of 10.5% and a maximum gain of 6.2 dBi. The compact size, low volume, and X-band operation make it suitable for various applications including satellite communication, weather radar, synthetic aperture radar, and telemetry tracking and control.
Article
Chemistry, Analytical
Xue-Ping Li, Jun-Fei Ji, Chang-Jiao Duan, Qian-Qian Sun, Wei Li, An-Xue Zhang
Summary: This paper proposes a novel ultra-compact four-port MIMO cylindrical dielectric resonator antenna with improved isolation for WLAN applications. By adjusting impedance matching and introducing a U-shaped slot design, the antenna successfully achieves decoupling and improved isolation. Simulation, fabrication, and testing results demonstrate the antenna's excellent performance.
Article
Engineering, Electrical & Electronic
Yong Mei Pan, Yang Hu, Shao Yong Zheng
Summary: A simple method using specific higher-order modes has been investigated to improve the isolation of dielectric resonator antenna elements, resulting in low mutual coupling levels and avoidance of radiation pattern distortion. This decoupling technique is effective for reducing both E-plane and H-plane coupling without the need for extra decoupling elements in the antenna system. Fabrication and measurements of a MIMO DRA array showed that using the proper mode can enhance isolation from about 15 to 45 dB at 5.25 GHz.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Min Li, Singwai Cheung
Summary: This study introduces a novel decoupling method using a dielectric superstrate to reduce coupling between multiple-input multiple-output dielectric resonator antennas. Results show significant isolation enhancement and improvements in radiation characteristics, offering a unique approach for isolation enhancement of MIMO DRAs.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Bing Zhang, Jian Ren, Tian Yang, Yan-Ting Liu, Zhipeng Zhao, Junfei Zhao, Ying Liu, Yingzeng Yin
Summary: This study investigates a compact three-port pattern- and polarization-diversity rectangular dielectric resonator antenna (DRA). The antenna is designed based on three TE modes, TE1 delta 1x mode, asymmetric TEy (1 delta 1) mode, and the presented quasi-omnidirectional mode, symmetrical TEy (1 delta 1) mode. The radiation mechanism of the presented symmetrical TE1 delta 1y mode is revealed by the theory of array and the geometric theory of diffraction. The antenna design achieves simultaneous excitation of symmetric and asymmetric TEy (1 delta 1) modes using metal strips as artificial boundaries.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Changwu Tong, Nan Yang, Kwok Wa Leung, Pengfei Gu, Rushan Chen
Summary: This article proposes a new decoupling method that simultaneously achieves port and radiation pattern decoupling in dielectric resonator antennas (DRAs). The method involves attaching conformal strips to the DRs and adjusting them to cancel the resonant and induced fields inside the DRs. The proposed method has been experimentally demonstrated to achieve high isolation and undistorted radiation patterns. The effectiveness of the method is evaluated using a new indicator called energy storage proportion (ESP). Measurement results show good agreement with simulation results, confirming the effectiveness of the proposed method.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Nikesh Kumar Sahu, Ravi Kumar Gangwar
Summary: This study proposes a decoupling method based on metallic sheets to improve inter-port isolation in MIMO dielectric resonator antenna systems. By utilizing metallic sheets, the electromagnetic energy is restricted to nearby slots, resulting in significant improvement in inter-port isolation. This method allows for a compact and simple antenna arrangement without requiring additional footprint.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Engineering, Electrical & Electronic
Yang Hu, Yong Mei Pan, Mei Di Yang
Summary: This study investigates a circularly polarized MIMO antenna consisting of two identical DRAs, which effectively increase isolation between them and allow for simultaneous operation. By using metal strips to change the E-field rotation direction, the polarization properties of the passive DRAs are reversed compared to the active DRAs. The prototype antenna operating in the 2.4 GHz WLAN band showed a significant improvement in isolation between the two CP DRAs.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Chen Yang, Kwok Wa Leung
Summary: A 3-D-printed wideband circularly polarized (CP) multiple-input-multiple-output (MIMO) antenna is proposed, which consists of two CP dielectric resonator antennas (DRAs) covered by a dielectric decoupler. The center-to-center distance between the two DRAs can be made as small as 0.33?(0) with a high isolation using the decoupler. The measured results of a prototype operating in X-band show a -10-dB impedance bandwidth of 21.7% (8.88-11.04 GHz), with an axial-ratio (AR) bandwidth and mutual coupling both less than 3 and -21.4 dB, respectively. The impedance and AR have a wide overlapping bandwidth of 21.7%.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Lei Guo, Haiting Fang, Yuxiang Sun, Yangping Zhao, Hui Li, Wenwen Yang
Summary: This article proposes a broadband and low-profile pattern-reconfigurable dielectric resonator antenna (DRA) with four different radiation patterns. By exciting two feeding ports with different phases, it achieves four radiation patterns and wide spatial coverage. The antenna demonstrates good performance in the 3.5 GHz frequency band.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Manzoor Elahi, Jingon Joung, Sungjoon Lim
Summary: The research focuses on using decoupling structure for improving isolation and bandwidth in a MIMO dielectric resonator antenna. The design successfully achieves circular polarization without occupying additional space, resulting in improved bandwidth and isolation performance. Experimental results show overlapping 3 dB axial ratio bandwidth of 13.8% with 20 dB isolation across the bandwidth.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Xiyao Liu, Kwok Wa Leung, Nan Yang
Summary: A compact horizontally polarized omnidirectional dielectric resonator antenna excited in the TE011+delta mode is presented, with an enhanced impedance bandwidth and suppressed cross-polar field. This antenna can be polarization reconfigured using diodes to switch between horizontal and vertical polarizations, with stable omnidirectional radiation patterns in both states.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Qi Xuan Lai, Yong Mei Pan, Shao Yong Zheng
Summary: This article investigates a novel self-decoupling method for MIMO dielectric resonator antenna (DRA) arrays. The method utilizes the transmission characteristics of a conformal strip that feeds the DRA. By adjusting the dimensions of the feeding strip, a standing-wave distribution of the E-field coupled to the metal strip of the adjacent passive DRA can be achieved, preventing energy from entering the receiving port and resulting in high isolation without additional decoupling structures. The feasibility of this self-decoupling method is verified using a prototype of a 2 x 2 MIMO planar DRA array, which showed a usable bandwidth of 10.8% and a maximum isolation of over 40 dB within the passband.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
J. J. Adams, S. C. Slimmer, J. A. Lewis, J. T. Bernhard
ELECTRONICS LETTERS
(2015)
Article
Engineering, Electrical & Electronic
Nicole L. Bohannon, Jennifer T. Bernhard
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2015)
Article
Engineering, Electrical & Electronic
Matthew W. Young, Siwen Yong, Jennifer T. Bernhard
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2015)
Article
Engineering, Electrical & Electronic
Kurt R. Schab, John M. Outwater, Matthew W. Young, Jennifer T. Bernhard
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2016)
Article
Engineering, Electrical & Electronic
K. R. Schab, J. T. Bernhard
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2017)
Article
Engineering, Electrical & Electronic
Brian B. Gibbons, Jennifer T. Bernhard
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2017)
Article
Multidisciplinary Sciences
Christopher W. Peterson, Seunghwi Kim, Jennifer T. Bernhard, Gaurav Bahl
Editorial Material
Engineering, Electrical & Electronic
Amir I. Zaghloul, Trevor S. Bird, Jennifer T. Bernhard
IEEE SENSORS JOURNAL
(2014)
Editorial Material
Engineering, Electrical & Electronic
Jennifer Bernhard, Ernst Bonek, Christos G. Christodoulou, David Kunkee, Kathleen L. Melde
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2014)
Article
Engineering, Electrical & Electronic
Inbar Hotzen Grinberg, Anudeep Mangu, Christopher W. Peterson, Eli Wilken-Resman, Jennifer T. Bernhard, Gaurav Bahl
IEEE TRANSACTIONS ON MAGNETICS
(2019)
Article
Computer Science, Information Systems
Pallavi Sharma, Jennifer T. Bernhard
Summary: This article presents the analysis of Archimedean spiral slots using the theory of characteristic modes. Purely magnetic characteristic modes are employed to study the behavior of a spiral slot etched in an infinite ground plane. The effect of spiral geometry parameters on the characteristic modes and guidelines for selecting appropriate slot dimensions are investigated and provided.
Proceedings Paper
Engineering, Electrical & Electronic
Matthew W. Young, Jennifer T. Bernhard
2015 9th European Conference on Antennas and Propagation (EuCAP)
(2015)
Proceedings Paper
Engineering, Electrical & Electronic
A. J. King, J. T. Bernhard
2015 9th European Conference on Antennas and Propagation (EuCAP)
(2015)
Proceedings Paper
Telecommunications
K. R. Schab, J. T. Bernhard
2015 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2015)
Proceedings Paper
Telecommunications
Ayah T. Massoud, Jennifer T. Bernhard
2015 IEEE INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION & USNC/URSI NATIONAL RADIO SCIENCE MEETING
(2015)
