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
Hauke Ingolf Kremer, Kwok Wa Leung, Mike W. K. Lee
Summary: For the first time, dielectric vias were used to design a substrate-integrated dielectric resonator antenna (SIDRA), resulting in a wideband multiring antenna. The wideband behavior is achieved through two different dielectric resonator modes.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Lei Wang, Yun-lei Shi, Yan Chen, Quan Huang, Wei-heng Shao, Wen-xiao Fang, Guo-guang Lu, Yun Huang, Yun-fei En
Summary: This article presents a new broadband circularly polarized dielectric resonator antenna with parasitic elements, achieving wider impedance and axial ratio bandwidth by introducing half-ring DRs as parasitic elements.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Zi-Kang Chen, Li Zhang, Zibin Weng, Rui-Yang Li
Summary: This letter presents a wideband wide-beam rectangular di-electric resonator antenna (DRA) using uniaxial anisotropic material for the first time. By tuning the uniaxial permittivity tensor, the radiation from the top wall of the DRA is enhanced and the gain at low elevation angle in the E-plane is improved. The bandwidth is broadened by merging the feed slot mode and the fundamental TE(111)(y) mode. The addition of a grounded substrate and trapezoidal notches on the ground broadens the half-power beamwidth (HPBW) in the H-plane. The measured results show an impedance bandwidth of 35.7% over a band of 2.65-3.8 GHz with HPBWs of at least 250 degrees and 162 degrees in the E-and H-planes, respectively.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Chen Xi Zhao, Yong Mei Pan, Guo Dong Su
Summary: This study investigates a 1 x 3 filtering dielectric resonator antenna (DRA) array, which achieves both good radiation and filtering performance without requiring complex filtering circuits.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Nikesh Kumar Sahu, Gourab Das, Ravi Kumar Gangwar, Karumudi Rambabu
Summary: A novel integrated four-element dielectric resonator-based multiple-input-multiple-output (MIMO) polarization diversity antenna is proposed in this letter, aiming to improve the reliability and performance of wireless connections by utilizing different types of antenna elements to radiate in opposite directions. Experimental measurements confirm the excellent performance of the proposed MIMO antenna in terms of frequency bandwidth and axial ratio bandwidth.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Yan-Ting Liu, Boyuan Ma, Shaode Huang, Shiyan Wang, Zhang Ju Hou, Wen Wu
Summary: This paper presents a wideband low-profile connected rectangular ring dielectric resonator (DR) antenna array for millimeter wave (mmWave) applications. The array consists of four rectangular ring DRA elements excited by microstrip feedlines. Various modes are excited simultaneously to achieve wideband design. The position of the dielectric arms connecting the DRAs has significant effects on the antenna performance. The prototype demonstrates good agreement between measured and simulated results, with a measured impedance bandwidth of 31.6% (22.52-30.97 GHz).
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
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
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, Multidisciplinary
Nikesh Kumar Sahu, Gourab Das, Ravi Kumar Gangwar
Summary: This work precisely explores the generation of circular polarization in two different dielectric resonator antenna elements using two different excitation schemes and demonstrates good performance in terms of pattern diversity and inter-port isolation for MIMO applications.
ENGINEERING SCIENCE AND TECHNOLOGY-AN INTERNATIONAL JOURNAL-JESTECH
(2022)
Article
Engineering, Electrical & Electronic
Changwu Tong, Hauke Ingolf Kremer, Nan Yang, Kwok Wa Leung
Summary: Using dielectric vias, a compact and wide-band circularly polarized dielectric resonator antenna is proposed. The use of high dielectric constant in the vias helps in reducing the size of the antenna. By redistributing the resonant frequencies, the antenna achieves wide impedance and axial ratio bandwidths. The antenna is fabricated using standard PCB process.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Saeed Fakhte, Mohammad Mahdi Taskhiri
Summary: A dual-band terahertz rectangular dielectric resonator antenna (DRA) based on graphene is proposed in this work. The resonant frequencies of the antenna's TE111y and TE113y modes can be tuned by varying the chemical potential of the graphene, which acts as an impedance surface. An approximate formula for obtaining the resonant frequency of the graphene-loaded DRA is also presented for the first time, and it shows good agreement with simulation results.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Majedehsadat Rad, Nastouh Nikkhah, Bijan Zakeri, Mohammad Yazdi
Summary: This paper presents two wideband dual-polarized dielectric resonator antennas for X-band radar applications and provides the design process and measurement results. The antennas demonstrate wideband impedance bandwidth and axial ratio, and offer both RHCP and LHCP radiation. They are suitable for various radar applications.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Priya Ranjan Meher, Bikash Ranjan Behera, Sanjeev Kumar Mishra
Summary: This paper presents the design of a compact broadband circularly polarized antenna based on a cubic dielectric resonator antenna, which has been experimentally verified to perform well and is suitable for various wireless applications operating in Bluetooth, ISM, Wi-Fi, and Wi-MAX frequency bands.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Zhen-Xing Xia, Kwok Wa Leung, Pengfei Gu, Rushan Chen
Summary: This study investigates a three-dimensional (3-D)-printed dual-fed dual-frequency dielectric antenna for vehicular communications. The antenna combines a dielectric resonator (DRA) antenna and a dielectric lens antenna, providing good performance in both S- and X-bands for various vehicle communication scenarios.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Energy & Fuels
Leboli Z. Thamae, Retselisitsoe I. Thamae, Thimothy M. Thamae
Article
Engineering, Electrical & Electronic
L. Z. Thamae, Z. Wu, W. Konrad
IET MICROWAVES ANTENNAS & PROPAGATION
(2009)
Article
Engineering, Electrical & Electronic
L. Z. Thamae, Z. Wu
IET MICROWAVES ANTENNAS & PROPAGATION
(2010)
Article
Engineering, Electrical & Electronic
L. Z. Thamae, Z. Wu
IET MICROWAVES ANTENNAS & PROPAGATION
(2012)
Article
Engineering, Electrical & Electronic
Sebota Mokeke, Leboli Z. Thamae
Summary: The integration of solar photovoltaic and wind energy into the power grid in Lesotho has caused both dynamic and steady state impacts, with simulations revealing that increased penetration of renewable energy resulted in grid instability.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Thato Nchakha Rateele, Leboli Z. Thamae
Summary: The electricity demand in Lesotho exceeds the domestic generation capacity, with a deficit of 59% met by imports. Lesotho has abundant renewable energy sources and can incentivize independent power producers to build solar PV and wind farms to increase energy security and diversify the power mix.
Review
Communication
Leboli Zachia Thamae
INTERNATIONAL JOURNAL OF DIGITAL TELEVISION
(2015)
Article
Economics
Retselisitsoe Isaiah Thamae, Leboli Zachia Thamae, Thimothy Molefi Thamae
STUDIES IN BUSINESS AND ECONOMICS
(2015)
