Metamaterials are a new class of ordered composites that exhibit exceptional electromagnetic properties not readily observed in nature. In particular, artificial materials with both negative permittivity and permeability have attracted widespread interest in recent years. These composites are constructed from an array of metallic in dielectric and magnetic substrates and exhibit unusual electro...

Mobile phone technology makes use of radio frequency (RF) electromagnetic fields transmitted through a dense network of base stations in Europe. Possible harmful effects of RF fields on humans and animals are discussed, but their effect on plants has received little attention. In search for physiological processes of plant cells sensitive to RF fields, cell suspension cultures of Arabidopsis th...

Present studies report the experimental results on the dielectric and attenuation parameters for leaves of two different tree species at X-Band microwave frequency, 10.5 GHz. Leaves of two different tree species viz., Azadirachta indica (Neem) and Acacia indica (Babool) have been used in these measurements. Complex dielectric constants of these tree leaves have been measured by using waveguide ...

WiMAX is introduced by the Institute of Electrical and Electronic Engineers (IEEE). Wireless provides a worldwide interoperability for microwave access. Now-adays telecommunication industries are highly concerned with the wireless transmission of data, which can employ many transmission types, from point to multipoint links. It contains full mobile internet access. several applications have alr...

The communication paradigm has rapidly shifted from wireless mobile networks to All-Internet Protocol (IP) networks such as Multimedia Sub-system (IMS), Multi-Media Domain (MMD), and Worldwide Interoperability for Microwave Access (WiMAX), led by service industry leaders and communication manufacturers. This emerging communication paradigm is to provide new various services, such as ubiquitous ...

IEEE 802.16e is a mobile version of Worldwide Interoperability for Microwave Access (WiMAX) that plays an important role in the evolution towards 4G. In this work, we focus on multimedia performance measurement for the purpose of a more realistic mobile WiMAX network test. Our work aims to make a contribution in better understanding the mobile WiMAX performance for multimedia applications. For ...

Worldwide Interoperability for Microwave Access (WiMAX) is a technology that bridges the gap between fixed and mobile access and offer the same subscriber experience for fixed and mobile user. Demand for such type of mobile broadband servicesaccess, which is further extended to support portability and mobility based on IEEE 802.16e, also known as Mobile WiMAX. However, frequent topology changes...

OBJECTIVES In recent years, the widespread use of mobile phones has lead to a public debate about possible detrimental effects on human health. In spite of years of research, there is still a great controversy regarding the possibility of induction of any significant physiological effects in humans by microwave radiations emitted by mobile phones. This study aims to investigate the effects of e...

A dynamic bias technology is proposed to meet linearity standards at high-power levels and simultaneously reduce power consumption at low-power output levels for a mobile WiMAX terminal application. The dynamic bias circuit induces voltage via the current from the source port of the final active stage, and makes the bias operate the PA dynamically as the output power level is increased. The fab...

This paper focuses on the performance of data services in mobile Worldwide Interoperability for Microwave Access (WiMAX) networks and development of a proper set of Key Performance Indicators (KPIs) that may be used to assess the network performance. Data collected via drive test from an already deployed network were analyzed with the goal to determine the QoS from the end user perspective. The...