Results 41 to 50 of about 10,285 (303)

Analysis of GaN HEMTs for broadband high-power amplifier design [PDF]

, 2022
S.128-131In this paper we present the analysis of GaN HEMT power cells for broadband high-power amplifier design. We compare different power cell layouts, different Al contents in the barrier layer, and different fieldplate configurations.
Mikulla, Michael, Quay, Rüdiger, Ambacher, Oliver, Raay, Friedbert van, Musser, M.   +4 more
core  

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Broadband High Power Amplifier Design Using GaN HEMT Technology [PDF]

, 2021
This paper presents the design and measurements of a broadband GaN HEMT power amplifier intended for point-to-point radios, electronic warfare systems, and test and measurement applications.
Ahmed Akgiray, Akgiray, Ahmed Halid, Dogancan Turt, Turt, Doğancan   +3 more
core   +1 more source

Power combination of broadband TRAPATT amplifiers

Electronics Letters, 1976
The power from two closely matched trapatt amplifiers was combined by means of two 3dB interdigitated hybrid couplers. An output power of 115 W with 350 MHz bandwidth was obtained from the combined circuit. This combination technique, the effectiveness of which was thought to be questionable for trapatt amplifiers, doubles their output power without ...
P.T. Ho, A. Rosen, J. Klatskin
openaire   +1 more source

Tailored Diketopyrrolopyrrole Derivatives for Efficient Deep‐Red Organic Lasers

Advanced Functional Materials, EarlyView.
Tailored diketopyrrolopyrrole derivatives exhibit high stable amplified spontaneous emission with single or dual bands. Incorporated into distributed‐feedback lasers based on one‐ and two‐dimensional dichromated‐gelatin diffractive gratings, these materials provide a robust, flexible platform for integrated organic deep‐red light sources. ABSTRACT Deep‐
Pablo Pasqués‐Gramage, Abelardo Sánchez‐Oliva, Álex Farrando‐Pérez, Pedro G. Boj, M. Victoria Gómez, Ana M. Rodríguez, Pilar Prieto, Rafael Muñoz‐Mármol, Andrew J. Musser, Iván Torres‐Moya, María A. Díaz‐García   +10 more
wiley   +1 more source

Intermodulation distortion performance enhancement of microwave power amplifiers [PDF]

, 2000
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.This thesis reports the author's investigation of the effects of the injection of specific signals on the intermodulation distortion performance of ...
Mbabele, M., Mbabele, Modeste
core  

Broadband and Energy-Efficient Power Amplifier Architectures [PDF]

, 2017
In this dissertation, power amplifier circuits and architectures are proposed that provide high efficiency for spectral-efficient high peak-to-average power ratio signals that are being used in modern communications systems.
Akbarpour, Mohammadhassan
core   +1 more source

Spin Dynamics in the van der Waals Ferromagnet CrTe2 Engineered by Niobium Doping

Advanced Functional Materials, EarlyView.
Spin‐dynamic magnetic properties of van der Waals (vdW) ferromagnet 1T‐CrTe2 are tuned via niobium (Nb) as Cr1‐xNbxTe2 (x = 0–0.2). Nb doping enables wide‐band tuning of the resonance frequency from 40 GHz down to the few‐GHz regime, accompanied by a moderate increase in the Gilbert damping from ∼0.066 to ∼0.14.
Dhan Raj Lawati, Prem Bahadur Karki, Jitender Kumar, Karishma Prasad, Mohamed A. Elekhtiar, Kai Huang, Bibek Tiwari, Suvechhya Lamichhane, Rupak Timalsina, Zane Hubble, Ayodimeji E. Aregbesola, John Watt, Sy‐Hwang Liou, Evgeny Y. Tsymbal, Jian Wang, Kapildeb Ambal, Abdelghani Laraoui   +16 more
wiley   +1 more source

Solid state optical conjugated polymer amplifier; with ultrafast gain switching [PDF]

, 2008
Conjugated polymers are organic materials which are attractive as optoelectronic devices because they have a combination of broad band emission, high gain, versatility in processing, are ductile and can be electrically pumped.
Amarasinghe, Dimali C. V.
core  

Stability of Medicinal Nanoemulsions to Spaceflight: Insights From the StarMed Experiment

Advanced Healthcare Materials, EarlyView.
Chitosan‐coated melatonin nanoemulsions (MN) recovered from a sounding rocket mission preserve droplet size and controlled‐release behavior, whereas uncoated nanoemulsions show ageing‐driven droplet growth and increased accessible drug fraction. Simple polymer coatings thus enhance the flight resilience of liquid space medicines under cumulative launch
Modupe Adebowale, Nguyen Van Duc Long, Philip M. Williams, Jens Hauslage, Volker Hessel   +4 more
wiley   +1 more source