Results 71 to 80 of about 1,302 (222)
Advanced Functional Materials, Volume 36, Issue 12, 9 February 2026.This study explores the benefits of metasurfaces made from functional materials, highlighting their ability to be adapted and improved for various high‐frequency applications, including communications and sensing. It first demonstrates the potential of these functional material‐based metasurfaces to advance the field of sub‐THz perceptive networks ...
Yat‐Sing To +5 more
wiley +1 more source
Electronically tuned 23 GHz Gunn oscillators for a microwave datalink
, 1988 Includes bibliographical references.A market has been identified for 23 GHz, short-haul, low-capacity, digital radio. The dissertation presents the development of the varactor controlled Gunn oscillators that constitute the crystal locked microwave ...
Kratzenstein, L
core
Design and Analysis of Frequency-Tunable Amplifiers using Varactor Diode Topologies
, 2011 The design of frequency-tunable amplifiers is investigated and the trade-off between linearity, efficiency and tunability is revealed. Several tunable amplifiers using various varactor diode topologies as tunable devices are designed by using load-pull ...
Nesimoglu, Tayfun, Tayfun Nesimoglu
core +1 more source
Reconfigurable Metamirrors Based on Compliant Mechanisms
Advanced Functional Materials, Volume 36, Issue 10, 2 February 2026.Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy +3 more
wiley +1 more source
Advanced Materials Technologies, Volume 11, Issue 4, 19 February 2026.An LCD‐compatible complementary liquid‐crystal metasurface delivers dual‐band, dual‐polarized Ka‐band wavefront control with millisecond switching via a 10‐µm LC gap. Interlaced patch/slot pairs enable independent phase tuning at 28 and 38 GHz, while strategic 45° slot rotation suppresses parasitic resonances. Measurements on a 160 × 160‐cell prototype
Daehyeon Kim +4 more
wiley +1 more source
Heterostructure Barrier Varactor Multipliers
, 1998 We describe the Heterostructure Barrier Varactor (HBV) diode and its application in frequency multipliers. Different varactor models are presented that easily can be used in large signal simulations.
Stake, Jan, +2 more
core +1 more source
Broadband Achromatic Programmable Electromagnetic Camouflage via Fluidic‐Accessible Metasurface
Advanced Science, Volume 13, Issue 10, 18 February 2026.A fluidic access metasurface enables dynamic, broadband electromagnetic illusions. By physically reconstructing conductive patterns with liquid metal, the metasurface achieves real‐time, pixel‐level control over phase dispersion. This allows for the programmable generation of arbitrary strong scattering point arrays, effectively deceiving high ...
Shipeng Liu +14 more
wiley +1 more source
, 2007 A varactor diode for a ultra-high-frequency (UHF) TV tuner that can be operated within 5V of tuning voltage (VT) is presented. The fabricated diode has a shallow junction with a heavily doped p++ region on a steep hyperabrupt n+ region.
Shon, Yeong Soo, Choi, S.-Y., Kim, H. S.
core +1 more source
Photoresponse of area-variable varactor diode
Electronics Letters, 1996 Photoresponses and microwave characteristics of an area-variable varactor diode are investigated in the frequency range up to 7 GHz. It is demonstrated that the on/off ratio of its capacitance corresponds to 18.5 at 1 GHz. The capacitance is also significantly altered by photoillumination, and a maximum on/off ratio of 450% is achieved at 1 GHz with ...
null Kim, null Kwon, null Hong
openaire +1 more source
Frequency multipliers on semiconductor diode structures
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2018 Obvious advantages of the millimeter wave technology including a large information capacity, high directivity of radiation, diagnostics and spectroscopy capabilities of different environments, including the methods of electron paramagnetic resonance and ...
M. F. Karushkin
doaj +1 more source