Results 231 to 240 of about 277,685 (261)
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Low-voltage operation GaAs spike-gate power FET with high power-added efficiency
IEEE Transactions on Electron Devices, 1997A GaAs power FET with a spike-gate has been developed for high-efficiency operation under extremely low supply voltage less than 1.5 V. The spike-gate provides both low on-resistance of 2.2 /spl Omega//mm and high transconductance of 180 mS/mm without reducing the output impedance or increasing the gate resistance.
T. Tanaka +5 more
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GaAs power HBTs with 84% power-added efficiency operating in C-X band
25th European Microwave Conference, 1995, 1995This paper describes the results of an experimental study of operating GaAs Power Heterojunction Bipolar Transistors (HBTs) in Class C bias mode over C-X frequency Bands. We find that the power-added efficiency (PAE) improves and power gain decreases in Class C when compared to Class AB bias.
Fazal Ali, Colin Aitchison, Bert Hewitt
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Record power added efficiency of bipolar power transistors for low voltage wireless applications
International Electron Devices Meeting 1998. Technical Digest (Cat. No.98CH36217), 2002To increase the power added efficiency (PAE) of low voltage RF bipolar power transistors for cellular applications, we investigated the influence of transistor parasitics on PAE. We found that reducing the output capacitance increases the PAE due to better second harmonic tuning.
F. van Rijs, H.A. Visser, P.H.C. Magnee
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Power added efficiency and linearity tradeoffs in GaN and GaAs microwave power HEMTs
Solid-State Electronics, 2010Abstract In this paper, power added efficiency (PAE) and linearity characteristics of AlGaN/GaN HEMTs are compared with those of high-voltage GaAs pseudomorphic HEMTs. Devices with different gate widths are characterized for their power output, gain, PAE and linearity performances as a function of bias current and source and load impedance.
T. Okayama, Mulpuri V. Rao
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Improved schemes for power-efficient broadcast in ad hoc networks
International Journal of High Performance Computing and Networking, 2006Ad hoc wireless networks are a special type of wireless network in which a collection of mobile hosts (nodes) with wireless network interfaces may form a temporary network without base-stations. How to design an energy efficient broadcast algorithm is very important.
Xiao Chen, Jian Shen
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X-band balanced power amplifier using novel coupler with 50% power-added efficiency
Microwave and Optical Technology Letters, 1999In this paper, we demonstrate an X-band balanced power amplifier using a novel microstrip line dc blocking impedance-transforming branch-line coupler (DCITBC). This novel coupler has the function of dc blocking, which can easily cascade two stages of an active circuit together. Therefore, we can reduce the cost and the circuit size.
Kuan-Liang Tsao +2 more
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Power efficient resilience and lifetime in wireless ad-hoc networks
Proceedings of the 1st ACM international workshop on Foundations of wireless ad hoc and sensor networking and computing, 2008The temporary and unfixed physical topology of a wireless adhoc network is determined by the distribution of the wireless nodes as well as the transmission power (range) assignment of each node. This paper studies asymmetric power assignments for which the induced communication graph is k-strongly connected, while minimizing the total energy assigned ...
Daniel Berend +2 more
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Distributed power control for power-aware energy-efficient routing in ad hoc networks
2002A BSTRACT In this paper, a distributed power control mecha- nism for ad hoc networks is proposed and investigated. This mechanism, acting at different layers, reduces the power consumption maintaining similar behavior, in terms of delay and throughput, as classic schemes. In the proposed strategy, the generic sender uses an appro- priate power level to
BERGAMO, PIERPAOLO +4 more
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A 4W V-band MMIC Power Amplifier with 24% Power-Added Efficiency
2021 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 2021Fangjin Guo +4 more
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