Vincent Ngo

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Recent advances in body area network technologies such as radio frequency identification and ham radio, to name a few, have introduced a huge gap between the use of current wireless sensor network technologies and specific needs of some important wireless sensor network applications such as medical care, disaster relief, or emergency preparedness and(More)
In this paper, the problem of mobility handling in wireless sensor network (WSN) is studied with a simple priority backoff technique. To incorporate this technique for stationary and mobile sensor nodes, a novel hybrid MAC protocol called VMAC is designed with a fixed frame length. VMAC combines the advantages of schedule-based MAC for energy savings and(More)
This paper presents the development of high power AlGaN/GaN HEMTs on GaN/SiC epi-materials in MACOM Technology Solutions. Instead using state-of-the art via-hole technology popular in the GaN HEMT industry to have the common-Source on the device bottom, our Source-contact is designed on the device top-surface for enhancing its surface thermal dissipation as(More)
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