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Appropriately designed InP/GaInAs -based pHEMTs with relatively conservative indium channel mole fractions are prime contenders for high-performance low-power dissipation mm-wave MMICs. A clear and distinct advantage of InP -based HEMT technology is that it is long since space-qualified, leveraging decades of InP fabrication and reliability know-how. As a first demonstrator of low-power operation,...
Semiconductor optical amplifiers (SOAs) offer cost effective components for deployment in next generation passive optical networks (PONs). This paper summarises the potential for SOAs in future PON evolutions.
This report presents the DC, pulsed I–V, small signal, and large signal characteristics of Freescale’s 48 V GaN HFET technology. Characterization of large signal performance for a 12.6 mm at 48V drain bias shows 89 W output power with an associated power density of 7.1 W/mm, linear gain of 17.5 dB, and a power-added efficiency (PAE) of 62%. Analysis of channel temperature over drain bias shows that...
The timely processing and dissemination of information over wireless sensor networks is a key aspect of their future success. This is especially important for delay-sensitive applications such as detection and estimation. This paper assumes a two-tier architecture for wireless sensor networks where sensor nodes are simple devices equipped with one antenna, and cluster heads are more powerful units...
This paper discusses the necessity and possibility of the application of the self-tuning principle to surface accuracy control in end milling. When the conventional numerical control is used, the actual tool position, which represents the finished work-piece geometry, often deviates from the desired position while milling thin webs. The necessary compensation for deflections is difficult because (1)...
A set of tasks {T1, T2, ..., Tr] are to be scheduled on a two-processor computing system. The execution time of each of the tasks is given. Moreover, a partial ordering ≪ over the set of tasks is specified. If Ti ≪ Tj, it is required that the execution of Tj will not begin until the completion of the execution of Ti. Let ω denote the total elapsed time for the execution of all the tasks in the set...
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