Results 81 to 90 of about 10,259 (303)
Broadband RF Power Amplifier Design Methodology Using Sequential Harmonic Characterization
, 2015 Radio Frequency Power Amplifier (RFPA) amplifies the communication signals to the required power level for transmission. It is the most power consuming stage in a transceiver chain; consequently, any improvement in terms of dissipated power and ...
Taghavi, Hosein
core +1 more source
300 GHz broadband power amplifier with 508 GHz gain-bandwidth product and 8 dBm output power
, 2022 S.1249-1252This paper presents a broadband H-band (220 - 325 GHz) power amplifier in a 35nm InGaAs-based metamorphic high electron mobility transistor technology.
Leuther, Arnulf +4 more
core +1 more source
Tapered amplifier laser with frequency-shifted feedback
SciPost Physics, 2016 We present a frequency-shifted feedback (FSF) laser based on a tapered amplifier. The laser operates as a coherent broadband source with up to 370GHz spectral width and 2.3us coherence time.
A. Bayerle, S. Tzanova, P. Vlaar, B. Pasquiou, F. Schreck
doaj +1 more source
When Cubic is Not Isotropic: Phonon–Exciton Decoupling in CuInSnS4 Single Crystals
Advanced Optical Materials, EarlyView.A cubic CuInSnS4 crystal does not fully play by cubic rules. While phonons follow the average iso‐tropic lattice symmetry, the disorder‐localized excitons break away, showing strong, and reproduci‐ble polarization‐dependent emission. This work shows how intrinsic cation disorder can turn a mac‐roscopically cubic material into a source of hidden ...
Lara Kim Linke +11 more
wiley +1 more source
Development of Broadband Power Amplifiers
, 2007 根據多項研究顯示不論在時間或是空間上，3GHz以下頻帶使用率約為15％∼85％，在3GHz以上的頻帶使用率更是相當低。因此美國聯邦通訊委員會（FCC）提出感知無線電系統（Cognitive Radio System），藉由偵測以及調整使用頻帶可以在不影響正規使用者的情形下提高頻帶使用率。為了能夠同時傳送多頻帶的訊號，傳送端必須要有一個寬頻功率放大器去適應這種系統。 本論文主要研究內容為射頻功率放大器的理論以及設計。我們分析了各種寬頻功率放大器的技巧，最後採用網路合成寬頻匹配的方法去實現寬頻功率放大器 ...
葉威志, Yeh, Wei-Chih
core
Bandwidth Extension of Resistive-Feedback CMOS Inverter Amplifier Using T-Coil Peaking
IEEE AccessThis paper presents a broadband CMOS three-stage resistive-feedback inverter (RFI) amplifier for high-speed applications. A novel T-coil-based peaking technique is proposed, combining over-shunt and gate peaking to extend the bandwidth with reduced ...
Minkyung Choi +4 more
doaj +1 more source
Advanced Optical Materials, EarlyView.Mono‐ and bilayer MoS2 photodetectors enable wavelength‐selective AC photoresponse and optically driven capacitance modulation under visible illumination. Green excitation produces the strongest cumulative capacitive response, consistent with trap‐mediated charge accumulation at mono/bilayer and metal–MoS2 interfaces.
Pegah Zandi +5 more
wiley +1 more source
Advanced Optical Materials, EarlyView.Associating a chiral bent core liquid crystal molecule, that self‐assembles into helical nanofilaments, with an achiral red‐NIR phosphorescent octahedral molybdenum cluster produces a hybrid material exhibiting efficient red‐NIR circularly polarized emission under UV excitation.
Jeanne Rebours +6 more
wiley +1 more source
Broadband Class-EM power amplifier with double reactance compensation technique
, 2020 This paper presents the analysis and design of a high-efficiency broadband Class-EM power amplifier (PA). The inherent broadband characteristic of the Class-EM PA that turns out due to the resistive-reactive impedance terminations at the fundamental and ...
Safari Mugisho, Moise +2 more
core +1 more source
Efficient technique for ultra broadband, linear power amplifier design [PDF]
, 2018 Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.This publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence
Böck, Georg +2 more
core +1 more source