Results 211 to 220 of about 277,685 (261)

Power-efficient multicasting in ad hoc networks

The 11th IEEE International Conference on Networks, 2003. ICON2003., 2004
For power-constrained wireless ad hoc networks, a crucial issue in routing and multicasting is to conserve as much power as possible while still achieving good throughput performance. In this paper, we propose a class of power-efficient multicasting algorithms using a new cost function that jointly optimizes power conservation and path efficiency ...
J. Ye, W.C. Wong, K.C. Chua
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Class-F power amplifier with high power added efficiency for 900MHz

2014 2nd International Conference on Electronic Design (ICED), 2014
This paper presents a design and implementation of a Power Amplifier for GSM Transmitters using a high efficiency class-F type. A typical class-F circuit has been designed, simulated and implemented using GaAs pHEMT transistor at a frequency of 900MHz. The proposed design achieves 95.5% of theoretical Power Added Efficiency and 28.9dBm output power. To
M. Al-Ajmi, A. Al-Blushi, R. Al-Mamari, Z. Nadir, M. Bait-Suwailam   +4 more
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Class-B power MMIC amplifiers with 70 percent power-added efficiency

IEEE Transactions on Microwave Theory and Techniques, 1989
C-band monolithic amplifiers using high-efficiency, refractory metal, multifunction-self-aligned-gate (MSAG) processing have been designed, fabricated, and tested. The class-B single-ended amplifier design uses reactive termination for higher order harmonics and achieves a power-added efficiency (PAE) of 70% with associated gain of 8 dB and output ...
I.J. Bahl, E.L. Griffin, A.E. Geissberger, C. Andricos, T.F. Brukiewa   +4 more
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2.3 V operation GaAs power MESFET with 68% power-added efficiency

Proceedings of 1994 IEEE GaAs IC Symposium, 2005
A state-of-the-art GaAs power MESFET operating at a drain bias of 2.3 V has been developed using the low-high doped channel structure. The device has 0.8-/spl mu/m gate length and 21-mm gate width. The power performance tested at a 2.3 V drain bias under 900 MHz operation frequency was output power of 31.3-dBm with 11.3-dB gain and 69-percent power ...
null Jong-Lam Lee, null Jae Kyoung Mun, null Haecheon Kim, null Jae Jin Lee, null Hyung-Moo Park, null Sin-Chong Park   +5 more
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Power-added efficiency errors with RF power amplifiers

International Journal of Electronics, 1997
This paper investigates the errors that can result when applying two different definitions of power-added efficiency to RF power amplifiers. The first definition is generic to all multiple-port networks and is simply the ratio of the total output power to total input power. The second definition is specific to RF power amplifiers and widely regarded as
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Highly Efficient InP/GaAsSb DHBTs With 62% Power-Added Efficiency at 40 GHz

IEEE Electron Device Letters, 2011
We report the large-signal load-pull characterization of InP/GaAsSb double heterojunction bipolar transistors (DHBTs) with fT and fMAX cutoff frequencies as high as 380 and 320 GHz, respectively. Measurements were performed at 40 GHz in a passive load-pull system to characterize the output power and power-added-efficiency (PAE) performance. A PAE of 60%
TEPPATI, VALERIA, Zeng Y., Ostinelli O., Bolognesi C. R.   +3 more
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X-band InGaP PHEMTs with 70% power-added efficiency

1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192), 2002
This paper describes the low-noise and power performance of InGaP/InGaAs PHEMTs lattice-matched to GaAs substrates. The 0.15-/spl mu/m/spl times/600-/spl mu/m PHEMTs exhibited extrapolated f/sub t/ and f/sub max/ of 70- and 150-GHz, respectively. At 10-GHz, 200-/spl mu/m devices yielded a low noise figure of 0.58-dB with very high associated gain ...
null Ming-Yih Kao, E.A. Beam, P. Saunier, W.R. Frensley   +3 more
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Power efficient range assignment in ad-hoc wireless networks

2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003., 2004
We study the problem of assigning transmission ranges to the nodes of ad hoc wireless networks to minimize power consumption while ensuring network connectivity. We give an exact branch and cut algorithm based on a new integer linear program formulation solving instances with up to 35-40 nodes in 1 hour; a proof that min-power symmetric connectivity ...
E. Althaus, G. Calinescu, I.I. Mandoiu, S. Prasad, N. Tchervenski, A. Zelikovsky   +5 more
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Power efficient topology control in wireless ad hoc networks

2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733), 2004
In the wireless ad hoc networks, for prolonging the communication duration of the nodes, the transmission power is required to be minimized to conserve the limited battery life. In addition, for the wireless ad hoc networks to be applicable, the networks are required to he connected. Unfortunately, the two requirements are against each other.
Tseng, Chih-Cheng, Chen, Kwang-Cheng
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Energy Efficiency of High Power Accelerators for ADS Applications

2016
One important issue identified by the 2014 comprehensive nuclear fuel cycle Evaluation & Screening report* that was chartered by the US Department of Energy was the impact of the electricity required to operate the accelerator on the overall efficiency of an Accelerator Driven System (ADS).The objective of this paper is to contribute some ...
Haj Tahar, Malek, Méot, Francois, Peggs, Steve   +2 more
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