Results 71 to 80 of about 4,146 (226)
High-Q anti-series AlGaN/GaN high electron-mobility varactor
, 2022 S.599-602This paper gives a first presentation of an anti-series AlGaN/GaN high electron-mobility varactor with a tuning ratio of 4.7 and a Q factor above 100. The losses could be decreased by 30% by omitting the ohmic junctions in the signal path.
Amirpour, Raul +4 more
core +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Hafnium oxide (HfO2) nanoparticles (NPs), derived from a rare‐metal element, have gained increasing attention as a versatile class of functional nanostructures with unique optical, dielectric, and surface properties that enable diverse biomedical applications. As a representative rare‐metal oxide, HfO2 NPs with well‐defined architectures offer
Mothana Hussein Tarawneh +8 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
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Varactor tuned dual-band Wilkinson power divider
, 2009 In this paper varactor tuned dual-band Wilkinson power divider for dual band applications is presented. A new power divider circuit for dual-band operation was modified by adding varactor diodes as tunable elements.
Budimir, D., Draskovic, D.
core
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
Comparison of Antennas Electrical Tuning Methods for Mobile Applications
Известия высших учебных заведений России: Радиоэлектроника, 2017 The various methods of antenna electrical tuning for mobile handsets working in several LTE frequency bands are described. The PIFA-type antenna containing high and low frequency branches is proposed.
A. D. Grigoriev, B. Djalilov
doaj
Independently Tunable Concurrent Dual-Band VCO Using Square Open-Loop Resonator
IEEE Access, 2018 A concurrent dual-band voltage-controlled oscillator (VCO) with independently tunable dual oscillation frequencies is proposed. A shared square open-loop dual-mode resonator and two varactor diodes are the basic units offering flexible tuning for the ...
Boqiong Li +3 more
doaj +1 more source
Varactor-tunable second-order bandpass frequency-selective surface with embedded bias network
, 2016 A varactor-tunable second-order bandpass frequency-selective surface (FSS) for microwave frequencies is presented in this article. The FSS is composed of three stacked metallic layers.
Said Al-Sarawi (522726) +4 more
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Reliability analysis of torsional varactor
, 2007 A torsional MEMS varactor with wide dynamic range, lower actuation voltage and isolation between actuation voltage and signal voltage has been proposed in C. Venkatesh et al. (2005).
Bhat, Navakanta, Venkatesh, C
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A micromachined zipping variable capacitor
, 2010 Micro-electro-mechanical systems (MEMS) have become ubiquitous in recent years and are found in a wide range of consumer products. At present, MEMS technology for radio-frequency (RF) applications is maturing steadily, and significant improvements have ...
Pu, Suan-Hui
core