Results 31 to 40 of about 5,179 (216)

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

Space‐Time Metasurface Antenna Enabled High‐Dimensional Electromagnetic Modulation for Intrinsic Physical Layer Security

Advanced Science, EarlyView.
The concept of high‐dimensional EM modulation using the STMA for physical layer secure communication is illustrated in figure. The STMA consists of a series of programmable unit cells, with 1‐bit reconfigurable phase states (0/π). The STMA is excited by a monochromatic continuous wave (CW) at frequency fc and controlled by a field‐programmable gate ...
Xinyu Fang, Yiqing Sun, Chenfeng Yang, Siran Wang, Zheng Xing Wang, Kaixu Wang, Geng‐Bo Wu   +6 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

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

Design and investigation of 65 nm rf cmos technology lc-vco’s / Aukštadažnių, 65 nm kmop technologijos, lc įtampa valdomų generatorių projektavimas ir tyrimas

Mokslas: Lietuvos Ateitis, 2014
In this paper, two LC Voltage-Controlled Oscillators (LC-LC-VCO1 and LC-VCO2) are designed using TSMC 65 nm LP/MS/RF CMOS technology. Two arrays, one of which is a 6-bit capacitor array and the other – an array of MOS varactors, provide a wide LC-VCO ...
Vytautas Mačaitis, Vaidotas Barzdėnas
doaj   +1 more source

Anti-Series Varactor Network With Improved Linearity Performances in the Presence of Inductive and Capacitive Parasitics

IEEE Access, 2021
This paper proposes a varactor-based circuit technique intended for amplitude and phase control, with improved linearity in the presence of parasitic capacitances and parasitic inductances.
David Berthiaume, Jean-Jacques Laurin, Nicolas G. Constantin   +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

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

A Tunable Dual-Band Bandpass-to-Bandstop Filter Using p-i-n Diodes and Varactors

IEEE Access, 2018
In this paper, a tunable dual-band bandpass-to-bandstop filter and its analysis are proposed. The bandpass-to-bandstop transformation could be obtained by changing the state of the p-i-n diode.
Fu-Chang Chen, Run-Shuo Li, Ji-Peng Chen
doaj   +1 more source

Implementation of Reconfigurable, Planar Meander Antenna for WLAN Applications

Journal of High-Frequency Communication Technologies, 2023
This paper presents the implementation of Reconfigurable, Planar Meander Antenna operates at 2.45 GHz and 5.12 GHz for WLAN applications. In the proposed work the planar meander antenna is designed using FR4 substrate. In the meander antenna the varactor
Bhuvaneswari B, Aruna V, Monisha R, Pooja E   +3 more
doaj   +1 more source