College of Engineering

Abstract: Telephone networks are an essential part of modern life, the newest version or generation is the broadband integrated services digital network (BISDN). The B-ISDN uses the ATM as a transmission protocol. ATM is a streamlined form of packet switching suitable for high speed networks; it developed as a part of B-ISDN. Its importance grows especially after the introduction of IP over ATM. It is a flexible mode of transfer. It can provide many QoS categories and can work with different rates.

Abstract: Protocol (VoIP) phone that is interfaced to Personal Computer (PC), with an installed VoIP Softwares under Windows, like Net2Phone or Skype which uses Internet protocol to transport voice. The IP phone is a cThis thesis explains the design, implementation of a Voice over Internet ombination of software and electronic hardware. The user of an IP phone can carry out a conversation with another phone user just like an ordinary phone.

Abstract: Microwave power transistors made of conventional semiconductors have already approached their performance limit. In order to meet the future needs of wireless communication systems, research efforts are directed to wide bandgap semiconductors such as GaN. The combined merits of high power and high speed can be achieved using High Electron Mobility Transistors (HEMTs) made of AlGaN/GaN materials system. In this work, presents both one-dimensional and two-dimensional models to assess the static characteristics of AlGaN/GaN HEMT.