Results 51 to 60 of about 5,321 (175)
Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 4, December 2026.ABSTRACT Safe and reliable communication infrastructure for advanced air mobility requires an intelligent and adaptable propagation channel. Electromagnetic meta‐materials, especially meta‐surfaces such as the reconfigurable intelligent surface enable such intelligence allowing programmability with multiple modes of electromagnetic wave manipulation ...
Roshan Antony Gomez, Michael Kaliske
wiley +1 more source
Varactor high level mixer [PDF]
, 1969 Varactor microwave frequency mixing ...
Penque, N. J., Rosen, H. A.
core
Scalable Multi‐Target Illusion via a Segmented Spatiotemporal Metasurface
Nanophotonics, Volume 15, Issue 19, 13 October 2026.An electromagnetic kaleidoscope is realized with a segmented spatiotemporal metasurface that transforms one physical aperture into multiple independently controlled false targets. Parallel‐sequence spectral translation codes apparent range and velocity, while segment allocation regulates echo amplitude. Experiments at 5 GHz generate two to five targets
Yujie Hong +10 more
wiley +1 more source
Realization of Direct Linear Relation Between Control Voltage and Resonance Frequency of the LC Voltage Controlled Oscillator [PDF]
Engineering and Technology Journal, 2018 The main problem of traditional LC ( L represents the inductance, and C represents the Capacitance) Voltage Controlled Oscillators VCOs, is the non-linearity relation between the tuning control voltage and output resonance frequency, which is caused by ...
Azzad Saeed
doaj +1 more source
Advanced Optical Materials, Volume 14, Issue 40, 27 October 2026.A theory‐guided magnetoelectric metasurface design breaks the conventional optical transparency and electromagnetic performance trade‐offs. By preserving the electric and magnetic current paths required for efficient reflection through fine‐metal‐line structure, the developed transparent reflective metasurface achieves high optical transparency without
Mina Feizi +5 more
wiley +1 more source
LOW PASS AND QUAD BAND PASS TUNABLE FILTER BASED ON STUB RESONATOR TECHNIQUE [PDF]
Jordanian Journal of Computers and Information Technology, 2019 An electronically tunable multi-passband filter using one varactor diode is implemented based on transmission line stub method for passing several most favourable applications through multiple operating bands.
Yanal S. Faouri +3 more
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Advanced Science, Volume 13, Issue 57, 14 October 2026.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 +6 more
wiley +1 more source
Bamboo‐Slip‐Inspired Conformal Reconfigurable Metasurfaces
Advanced Science, Volume 13, Issue 58, 19 October 2026.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 +9 more
wiley +1 more source
Multiple varactor frequency doubler Patent [PDF]
, 1969 Multiple varactor for generating high frequencies with high power and high conversion ...
Habra, J. H.
core
Engineering Science and Technology, an International Journal, 2019 In this work a wide-bandwidth low-power voltage-controlled oscillator (VCO) design is presented using a new differential delay cell with complementary current control mechanism and inversion mode MOSFET (IMOS) varactor.
Vivek Jangra, Manoj Kumar
doaj +1 more source