Results 21 to 30 of about 611,978 (349)

A Dielectric Resonator Fed Wideband Metasurface Antenna With Radiation Pattern Restoration Under its High Order Modes

IEEE Access, 2020
In this article, a dielectric resonator (DR) excited wideband metasurface (MTS) antenna with differential feeding is proposed, which uses two modes of the MTS and the fundamental mode of the DR to achieve multimode operation and obtain wide bandwidth ...
Yonghui Qiu, Zibin Weng, Zhi-Qiang Zhang, Jianfeng Liu, Hong-Wei Yu, Yi-Xuan Zhang   +5 more
doaj   +1 more source

Fundamental issues in antenna design for microwave medical imaging applications [PDF]

, 2010
This paper surveys the development of microwave medical imaging and the fundamental challenges associated with microwave antennas design for medical imaging applications. Different microwave antennas used in medical imaging applications such as monopoles,
Busawon, Krishna, Elsdon, Michael, Fernando, Michael, Smith, Dave   +3 more
core   +1 more source

Distributed Detection over Fading MACs with Multiple Antennas at the Fusion Center [PDF]

, 2010
A distributed detection problem over fading Gaussian multiple-access channels is considered. Sensors observe a phenomenon and transmit their observations to a fusion center using the amplify and forward scheme.
Banavar, Mahesh K., Smith, Anthony D., Spanias, Andreas, Tepedelenlioglu, Cihan   +3 more
core   +1 more source

Wideband Low-Profile Luneburg Lens Based on a Glide-Symmetric Metasurface

IEEE Access, 2020
This paper presents a two-dimensional low-profile Luneburg lens that is designed by using a glide-symmetric metasurface. The entire lens consists of two mirrored metal plates with periodic metal pins, and the pins on one plate are glided exactly a half ...
Fangfang Fan, Mingbo Cai, Jiachen Zhang, Zehong Yan, Jinxiao Wu   +4 more
doaj   +1 more source

An investigation into the Gustafsson limit for small planar antennas using optimisation [PDF]

, 2013
The fundamental limit for small antennas provides a guide to the effectiveness of designs. Gustafsson et al, Yaghjian et al, and Mohammadpour-Aghdam et al independently deduced a variation of the Chu-Harrington limit for planar antennas in different ...
Lewis, Andrew, Shahpari, Morteza, Thiel, David V.   +2 more
core   +2 more sources

A Dual-Band MIMO Antenna With Enhanced Isolation for 5G Smartphone Applications

IEEE Access, 2019
In this paper, a compact dual-band MIMO antenna array for 5G smartphone applications is proposed. The MIMO antenna consists of eight folded monopole antennas operating at 3.45-GHz band (3300~3600MHz).
Wen Jiang, Yangqiang Cui, Bo Liu, Wei Hu, Yan Xi   +4 more
doaj   +1 more source

A Miniaturized Dual-Band Frequency Selective Surface with Enhanced Capacitance Loading for WLAN Applications

Sensors
This article presents a miniaturized dual-band frequency selective surface (FSS) based on capacitance-enhancing technique for RF shielding applications. The FSS incorporates two independent corner-modified square loop (CMSL) elements realized on a lossy ...
Muhammad Idrees, Sai-Wai Wong, Abdul Majeed, Shu-Qing Zhang, Yejun He   +4 more
doaj   +1 more source

Design of Wideband Circularly Polarized Crossed-Dipole Antenna Using Parasitic Modified Patches

IEEE Access, 2019
In this paper, a wideband circularly polarized (CP) crossed-dipole antenna is presented by using parasitic modified patches. Four polygonal metal patches are sequentially rotated around the crossed dipoles.
Zhipeng Zhao, Yapeng Li, Meng Xue, Le Wang, Zhaoyang Tang, Yingzeng Yin   +5 more
doaj   +1 more source

Design of a Miniaturized and Polarization-Independent Frequency-Selective Surface for Targeted EMI Shielding

Applied Sciences
In this article, a miniaturized frequency-selective surface (FSS)-based electromagnetic shield is investigated for EMI mitigation in the X-band. The FSS comprises a convoluted conducting loop designed over an FR-4 substrate.
Muhammad Idrees, Yejun He, Youquan Wen, Abdul Majeed   +3 more
doaj   +1 more source

A Meta-Surface Decoupling Method for Two Linear Polarized Antenna Array in Sub-6 GHz Base Station Applications

IEEE Access, 2019
In this paper, an extremely compact two-element linear polarized multiple-input-multiple-output (MIMO) antenna array with a metasurface superstrate is proposed.
Feng Liu, Jiayin Guo, Luyu Zhao, Xiumei Shen, Yingzeng Yin   +4 more
doaj   +1 more source