Results 11 to 20 of about 2,026,776 (294)

Integration of sol-gel frequency agile materials for tunable RF devices [PDF]

open access: yes, 2012
This thesis focuses on the use of high permittivity tunable dielectrics and more specifically sol-gel ferroelectric thin films for low cost, high performance tunable devices such as varactors and filters at RF and microwave frequencies.
Fragkiadakis, Charalampos
core   +7 more sources

New thermocouple-based microwave/millimeter-wave power sensor MMIC techniques in GaAs [PDF]

open access: yes, 2010
We describe a new RF and microwave power sensor monolithic microwave integrated circuit design. The circuit incorporates a number of advances over existing designs.
Steve Cochran   +11 more
core   +1 more source

Axially symmetrical Fabry-Perot oscillator with multiple devices inserted in dielectric substrate [PDF]

open access: yes, 1997
We investigate an axially symmetrical Fabry-Perot oscillator with active devices inserted in a dielectric substrate for power combining of many more devices in the microwave and millimeter wave frequency range.
Sanagi, Minoru   +5 more
core   +1 more source

Physics-based large-signal sensitivity analysis of microwave circuits using technological parametric sensitivity from multidimensional semiconductor device models [PDF]

open access: yes, 1997
The authors present an efficient approach to evaluate the large-signal (LS) parametric sensitivity of active semiconductor devices under quasi-periodic operation through accurate, multidimensional physics-based models.
Bonani, S.   +15 more
core   +3 more sources

New High-Efficiency Resonant O-Type Devices as the Promising Sources of Microwave Power

open access: yesEnergies, 2020
New O-type high-power vacuum resonant microwave devices are considered in this study: COM klystrons, CSM klystrons and resotrodes. All these devices can output a large amount of power (up to units of MW and higher) with an efficiency of up to 90%.
Andrei Baikov, Olga Baikova
doaj   +1 more source

Improved Empirical Formula Modeling Method Using Neuro-Space Mapping for Coupled Microstrip Lines

open access: yesMicromachines, 2023
In this paper, an improved empirical formula modeling method using neuro-space mapping (Neuro-SM) for coupled microstrip lines is proposed. Empirical formulas with correction values are used for the coarse model, avoiding a slow trial-and-error process ...
Shuxia Yan   +5 more
doaj   +1 more source

The microwave digestion of solids [PDF]

open access: yes, 1990
Bibliography: leaves 115-116.Microwave ovens have been available for domestic cooking since 1956. This method of heating is very efficient compared to conventional cooking methods.
Broomhall, G A
core   +1 more source

An optimization design scheme applied to multi-modules cascading of transceiver IC

open access: yesDianzi Jishu Yingyong
In this paper, a novel optimization design scheme is proposed to solve the cascading mismatch problem of sub-circuits in beamforming chips due to parasitic effects.
Yu Qiushi   +9 more
doaj   +1 more source

When self-consistency makes a difference [PDF]

open access: yes, 2008
Compound semiconductor power RF and microwave device modeling requires, in many cases, the use of selfconsistent electrothermal equivalent circuits.
Bonani, Fabrizio   +5 more
core   +1 more source

Electronically tuned 23 GHz Gunn oscillators for a microwave datalink [PDF]

open access: yes, 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   +1 more source

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