Results 31 to 40 of about 4,146 (226)

Dual-Layer Beamscanning Reflectarray Antenna Operating at Ku-Band

Journal of High-Frequency Communication Technologies, 2023
This paper presents a beam scanning electronically reconfigurable reflectarray configuration for Ku-band applications using a single varactor diode.  A 15×15 center-fed reconfigurable reflectarray antenna is designed consisting of 225 octagonal shaped ...
Vidhyashree Suresh, Aishika Bhattacharjee, Kirubaveni Savarimuthu   +2 more
doaj   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

A K-Band VCO With AC-Shorted Transformer Tank for 76–81 GHz FMCW Radars

IEEE Access
This paper presents an 18.5–20.6 GHz voltage-controlled oscillator (VCO) that achieves a wide tuning range and low phase noise, suitable for frequency-modulated continuous-wave (FMCW) radar systems.
Weihu Wang, Brian A. Floyd
doaj   +1 more source

Compact Reconfigurable Band Notched UWB Cylindrical Dielectric Resonator Antenna Using Single Varactor Diode

Advanced Electromagnetics, 2018
This paper presents compact UWB cylindrical dielectric resonator antenna with reconfigurable band notch capability using single varactor diode. Theoretical results are achieved for the design with the range of frequencies 4-10.6 GHz.
A. S. Elkorany, S. A. Saad, D. A. Saleeb
doaj   +1 more source

Pattern Reconfigurable Dual-Polarized Dipole Antenna With Staggered Parasitic Elements

IEEE Access, 2022
This paper presents a pattern reconfigurable dual-polarized dipole antenna with staggered parasitic elements operating in 3.5 GHz band. The proposed antenna is designed by assembling two linearly polarized antennas to be orthogonally polarized, and each ...
Ju-Ik Oh, Jeong-Wook Kim, Sang Hyuck Han, Sol Kim, Jong-Won Yu, In-June Hwang   +5 more
doaj   +1 more source

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

Advanced Electronic Materials, EarlyView.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

Experimental Characterization of a New Active Huygens’ Metasurface-Based Element for Beam Steerable Lens at Ka-Band

IEEE Access
In this paper, a novel reconfigurable linearly polarized ultrathin unit cell design for lens applications at Ka-band frequencies (26-28.75 GHz) is presented.
Zohre Pourgholamhossein, Tayeb A. Denidni   +1 more
doaj   +1 more source

Reconfigurable Mach–Zehnder interferometer for dynamic modulations of spoof surface plasmon polaritons

Nanophotonics, 2021
We propose an ultrathin reconfigurable Mach–Zehnder interferometer (MZI) for realizing dynamic frequency and amplitude modulations of spoof surface plasmon (SSP) signal.
Cui Wen Yi, Zhang Jingjing, Gao Xinxin, Cui Tie Jun   +3 more
doaj   +1 more source

A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS

Advanced Electronic Materials, EarlyView.
A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang, Zheng Xing Wang, Wanwan Cao, Zhen Jie Qi, Li Jie Wu, Han Qing Yang, Qun Yan Zhou, Si Ran Wang, Hui Dong Li, Jun Yan Dai, Jiang Luo, Jun Wei Wu, Jia Nan Zhang, Zhen Zhang, Qiang Cheng   +14 more
wiley   +1 more source

Compact single‐varactor diode frequency‐reconfigurable microstrip patch antenna

IET Microwaves, Antennas & Propagation, 2021
A single‐varactor frequency‐reconfigurable microstrip patch antenna is presented. The antenna comprises a symmetrical arrangement of four metallised patches coupled and interconnected via slots and metallic bars, respectively.
Mahmoud Al Ahmad, Saifudeen Kabeer, Ala Abu Sanad, Lillian J. A. Olule   +3 more
doaj   +1 more source