Bøger af Puja Acharya

The dispersion and non-linearities both occur simultaneously in a system and play an important role in degrading the overall performance of optical communication system and networks. The interest in non-linear fiber optics is expected to continue in view of the current emphasis on the development of the photonics-based technologies for information management. The dispersion and non-linear interactions of fiber material set an upper limit to the amount of information that can be transmitted. The significance of impairments becomes more critical while realizing ultra-high dense wavelength division multiplexed systems (DWDM) that are used to exploit optical bandwidth. Particularly for long haul transmission with number of WDM channels, the accumulated non-linear effects lead to waveform distortion and cross talk between Channels.Therefore, in order to realize broadband optical communication systems and networks, it is imperative to compensate the pulse spreading due to group velocity dispersion (GVD) and fiber non-linearities due to optical kerr¿s effects.

A fundamental component of all wireless communication systems, the antenna is essential to their effective operation. There are many various types of antennas on the market, each with unique features. This book presents a miniaturized microstrip antenna for a satellite phone in lower earth orbit. With respectable performance, the suggested antenna is 66.3% smaller than a conventional circular patch antenna. Furthermore, the radiator plane adjustments are producing a true omnidirectional pattern. The antenna works in unlicensed spectrum band at 1600 MHz and is highly recommended for ISM band The compact size, reasonable gain, and monopole radiation pattern make this antenna suitable for the 1525 MHz band satellite phones. it suitable for applications in satellite and RADAR communications. Multi bands and ultra-wideband antennas are also executed with miniatured size and can be integrated easily with innumerable wireless devices.