Results 31 to 40 of about 9,744 (208)
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
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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 +5 more
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Device for diode tuning in a stripline varactor harmonic multiplier [PDF]
, 1969 Stripline varactor harmonic multiplier uses a device for positioning the varactor diode with respect to the stripline circuit to obtain series resonance.
Steele, K. P.
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Advanced Functional Materials, EarlyView.Ferroelectric memcapacitors enable non‐volatile, voltage‐programmable capacitance tuning for adaptive electronics. A TiN/HfZrO/TiN device stack demonstrates more than eight stable capacitance states within a 24 pF memory window in compact 60 ×$\times$ 60 μm2$\umu{\rm m}^{2}$ devices at low operating voltages.
Deepika Yadav +6 more
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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 +3 more
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Varactor diode assembly with low parasitic reactances [PDF]
, 1975 Development of varactor diode assembly overcomes parasitic reactances of conventional varactor packages. In specially constructed assembly very high idler-frequency to signal-frequency ratios are used to obtain low-noise operation over maximum ...
Dickens, L. E.
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Silicon-based distributed voltage-controlled oscillators [PDF]
, 2001 Distributed voltage-controlled oscillators (DVCOs) are presented as a new approach to the design of silicon VCOs at microwave frequencies. In this paper, the operation of distributed oscillators is analyzed and the general oscillation condition is ...
Hajimiri, Ali, Wu, Hui
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Metamaterial Antennas Enhance MRI of the Eye and Occipital Brain
Advanced Materials, EarlyView.A radiofrequency antenna platform comprising planar and bend configurations is developed, incorporating structurally integrated epsilon‐negative metamaterial unit cells to enhance MRI. These antennas enable high‐resolution in vivo human MRI of the eye, orbit, and occipital brain. Comprehensive validation, including simulations, phantom experiments, SAR,
Nandita Saha +14 more
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A K-Band VCO With AC-Shorted Transformer Tank for 76–81 GHz FMCW Radars
IEEE AccessThis 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
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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 +3 more
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