Results 41 to 50 of about 436,887 (206)

Beam scanning using microstrip line on biased ferrite [PDF]

, 1997
The beam scanning properties of a 2-element patch array fed by a microstrip reed situated on a ferrite substrate are presented. Biasing the ferrite changes the phase length or the microstrip line, scanning the beam by up to 40 degrees. The resulting scan
Langley, Richard J., Batchelor, John C.
core   +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

Circularly-polarized 28-GHz antenna for next generations of communication systems

Scientific Reports
A circularly-polarized (CP) printed antenna is proposed for millimeter-wave mobile communications. The antenna has a defected ground structure (DGS), and it operates at 28 GHz.
Rania R. Elsharkawy, Khalid. F. A. Hussein, Asmaa E. Farahat   +2 more
doaj   +1 more source

Adaptive numerical integration technique for the analysis of open planar circuits and antennas [PDF]

, 1997
This paper presents new adaptive integration technique in the spectral domain to speed up the impedance matrix calculation. This includes the adaptive truncation which limits the infinite integration into the finite computer resources and the adaptive ...
C. J. Railton, Balik, Hasan Hüseyin, Railton, CJ, Hasan H. Balik, Balik, HH   +4 more
core   +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

Recent Advances in Programmable Metasurfaces and Meta‐Devices

Advanced Electronic Materials, EarlyView.
Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao, Chong He, Nan Wang, Liming Si, Weiren Zhu   +4 more
wiley   +1 more source

Analysis and control of harmonic radiation from active integrated oscillator antennas [PDF]

, 2002
Harmonic radiation from microstrip patch oscillators is examined experimentally and theoretically using both a single and dual parallel-tuned circuit Van der Pol oscillator model.
Buesnal, GR, Cryan, MJ, Hall, PS, Hall, Peter, Buesnel, GR, Cryan, M   +5 more
core   +1 more source

A Compact Resistively Loaded Metamaterial Absorber for 2.4 GHz RF Energy Harvesting With Impedance‐Matched Rectifier Analysis

Advanced Electronic Materials, EarlyView.
A compact resistively loaded metamaterial absorber captures RF energy at 2.4 GHz and directs most of the accepted power to modeled loads. The resonant response is confirmed experimentally for the fabricated absorber, while an impedance‐matched rectifier is evaluated through simulation. The stage‐wise results distinguish absorber, rectifier, and cascade
Md. Murad Kabir Nipun, Md. Jahedul Islam
wiley   +1 more source

Design of novel multiband bandpass filters based on coupled symmetric short‐circuit stub multimode resonators

Electronics Letters
In this letter, the working mechanism of suggested bandpass filters with connected symmetric short‐circuit stub multimode resonators is described. Because of the design flexibility, the suggested bandpass filters' centre frequencies may be modified based
Jie Luo, Zaiyue Liu, Shanshan Gao
doaj   +1 more source

A New Compact Quad-Band Metamaterial Absorber Using Interlaced I/Square Resonators: Design, Fabrication, and Characterization

IEEE Access, 2020
This paper presents the design and analysis of a new compact quad-band metamaterial absorber (MMA). The proposed structure is constructed as an array of 12 × 13 unit cells, each one is based on a combination of interlaced I/square resonators ...
Mohamed Edries, Hesham A. Mohamed, Sherif S. Hekal, Mohamed A. El-Morsy, Hala A. Mansour   +4 more
doaj   +1 more source