Results 31 to 40 of about 588,345 (204)

Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]

, 2014
A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier, Martinez, R, Sharma, A, Batchelor, John C., Garcia Zuazola, Ignacio Julio, de-Haro Ariet, L   +5 more
core   +1 more source

Design of Microstrip Antenna Arrays with Rotated Elements Using Wilkinson Power Dividers for 5 G Customer Premise Equipment Applications

International Journal of Antennas and Propagation
Microstrip antenna arrays are proposed in this paper for the customer premise equipment (CPE) applications in the frequency range 1 (FR1) of the 5th generation (5 G) mobile networks. The proposed antenna arrays consist of three FR4 substrates.
Ting-Yi Huang, Yun-Jhang Lee
doaj   +1 more source

A Horizontal Azimuth Pattern-Reconfigurable Antenna Using Omnidirectional Microstrip Arrays for WLAN Application

International Journal of Antennas and Propagation, 2019
A horizontal azimuth pattern-reconfigurable antenna with configurable parasitic element arrays for WLAN applications is proposed in this paper. It consists of a control board, a central series-fed omnidirectional microstrip array, four configurable ...
Liang Yang, Cheng Lu, Xiao Li, Leilei Liu, Xiaoxing Yin   +4 more
doaj   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

Advanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Circularly Polarized Antenna Array Fed by Air-Bridge Free CPW-Slotline Network

International Journal of Antennas and Propagation, 2017
A novel design of 1×2 and 2×2 circularly polarized (CP) microstrip patch antenna arrays is presented in this paper. The two CP antenna arrays are fed by sequentially rotated coplanar waveguide (CPW) to slotline networks and are processed on 1 mm thick ...
Yilin Liu, Kama Huang, Xia Luo
doaj   +1 more source

Bamboo‐Slip‐Inspired Conformal Reconfigurable Metasurfaces

Advanced Science, EarlyView.
Bamboo‐slip‐inspired conformal reconfigurable metasurface system. The structure is mainly composed of three parts, which are conformal metasurface, pattern reconfigurable antenna, and control components (such as Field Programmable Gate Array (FPGA)). Conformal metasurfaces draw inspiration from the design of ancient Chinese bamboo slips.
Qifan Li, Shaofeng Zhang, Qiang Feng, Dexiao Xia, Yajie Mu, Xiangjin Ma, Jiaqi Han, Haixia Liu, Guangyao Liu, Long Li   +9 more
wiley   +1 more source

Accurate DOA Estimations Using Microstrip Adaptive Arrays in the Presence of Mutual Coupling Effect

International Journal of Antennas and Propagation, 2013
A new mutual coupling calibration method is proposed for adaptive antenna arrays and is employed in the DOA estimations to calibrate the received signals.
Qiulin Huang, Hongxing Zhou, Jianhui Bao, Xiaowei Shi   +3 more
doaj   +1 more source

A Wideband, Circularly Polarized, Directive Antenna With a Circular Reflector

IEEE Access, 2019
A two-element, patch antenna with a single feed is presented to achieve wideband, circular polarization, and uni-directional radiation. The driven element of the antenna has a rotated, corner-truncated radiating patch to achieve circularly polarized ...
Tyler J. Mcpherson, Zabed Iqbal, Sungkyun Lim   +2 more
doaj   +1 more source

From Sensing Mechanisms to System Co‐Design: Graphene‐Based Sensors and Readout Circuits

Advanced Science, EarlyView.
This review establishes a unified PS–EQ–RF framework linking graphene sensing mechanisms, native electrical outputs, and output‐specific readout circuits. Voltage‐, current‐, resistance‐, and capacitance‐type sensing systems are systematically classified to guide architecture selection, low‐noise design, system co‐design, and practical integration ...
Jinduo Zhang, Meng Chen, Guanchen Li, Ruifeng Liu, Yingxin Wang, Ziran Zhao   +5 more
wiley   +1 more source

Conception of bi-band rectangular microstrip array antenna

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
Narrow band is the major inconvenient of the microstrip antenna. However, various multiband techniques are proposed towards several applications.
Zaakri Safa, Zenkouar Lahbib, Bri Seddik
doaj   +1 more source