Results 61 to 70 of about 152,070 (212)
A varactor tuned low-cost 24 GHz harmonic VCO [PDF]
Advances in Radio Science, 2006 We present a low-cost 24 GHz VCO that is based on a microstrip design combined with discrete packaged devices. The output frequency is generated by a harmonic oscillator. The tunabilty was reached using a varactor diode.
M. O. Olbrich, L. Huang, E. M. Biebl
doaj
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
Transition voltage of AlGaN/GaN heterostructure MSM varactor with two-dimensional electron gas
, 2017 It is not in principle clear which of the capacitors forming a varactor is responsible for the capacitance change at the transition voltage. We analyzed a theoretical case of transition voltage of the varactor formed by ideal Schottky diodes.
L. Chow +9 more
core +1 more source
Advanced Science, Volume 13, Issue 58, 19 October 2026.Recent advances in metasurface‐enabled low‐observable technologies are reviewed from the perspective of cross‐scale material–structure synergy. Electromagnetic, thermal, optical, and acoustic stealth are highlighted together with dynamic tuning, programmable coding, data‐driven inverse design, artificial intelligence, multispectral compatibility, and ...
Shuhao Wang +5 more
wiley +1 more source
Nanophotonics, Volume 15, Issue 17, 11 September 2026.This work constructs a radio‐frequency front‐end‐free hybrid code‐division and space‐division‐multiplexing wireless communication system built on programmable space‐time‐coding metasurfaces. Orthogonal pseudo‐random codes reliably separate overlapped multistream signals that share identical frequency, time, and spatial resources.
Yuzhen Chen +3 more
wiley +1 more source
Beam steerable traveling wave meander line antenna using varactor diode for X-band applications
, 2008 This paper presents a novel beam steerable meander line antenna with varactor diode for X-band applications. Beam steering has been achieved by loading the arms of the meander line antenna with varactor diodes.
Gokalp, Nihan +5 more
core +1 more source
Design of a tunable linearity-enhanced Doherty power amplifier based on varactor diode networks
Engineering Science and Technology, an International JournalThis article presents a tunable linearity-enhanced technique using varactor diode networks (VDNs) to enhance the linearity of Doherty power amplifiers (DPAs) under broadband high peak-to-average power ratio (PAPR) signals.
Yating Li +4 more
doaj +1 more source
Spectral characterisation of variable reactance devices [PDF]
, 1987 Low Noise Figure communication receivers require more efficient frequency converters. Frequency conversion and multiplication processes cannot take place without the existence of harmonics in the system and the inherent property of a nonlinear element is
Fifa, Ekaterini
core
, 2016 Equations are derived for a parametric chaos generator containing three oscillatory circuits and a variable-capacitance diode (varactor) and are reduced to equations for slow amplitudes of parametrically interacting modes.
Kuznetsov, Sergey P.
core +1 more source
Sub‐Terahertz Memristor Switches Using MoS2 by Liquid–Liquid Interface Assembly
Advanced Science, Volume 13, Issue 49, 3 September 2026.This work introduces application‐ready sub‐terahertz memristor switches fabricated from electrochemically exfoliated MoS2 nanosheets assembled at a liquid–liquid interface. The devices exhibit robust unipolar resistive switching, low insertion loss, and high isolation across 10–110 GHz.
Tomás Mingates +15 more
wiley +1 more source