An antenna is an electromagnetic radiator, a sensor and a transducer that converts guided electromagnetic energy in a transmission line to radiate electromagnetic energy. Recently Ultra WideBand (UWB) antenna plays an important role in communication system because of its low cost, low power consumption, low interference, capability of high data rate of around 100mega bits/second ...

Wireless network consists of distributed sensor nodes to monitor the physical conditions and establish the traffic system. Every node in WSN sends and receives the packet, resulting in wastage of bandwidth. However, bandwidth effective sensor node is not effective in improving the energy-saving protocol in wireless sensor network. The wake-up process with high energy consumption ...

Cognitive radio is an emerging technology for the effective frequency utilization. The fixed spectrum allocation has resulted in spectrum holes. The cognitive radio solves the problem for unused spectrum by the mechanism of spectrum assignment. This paper proposes an efficient spectrum assignment by Markov scheduling, banker’s algorithm for deadlock avoidance and applying the graph coloring ...

In this paper, a novel structure of metamaterial is proposed in order to miniaturize a rectangular microstrip patch antenna. The metamaterial is composed of two nested split octagons which are located on a 10 mmx10 mm Rogers RT/duroid 5880 with 0.7874mm thickness and dielectric constant of 2.2. A 3×5 array of such metamaterials is placed ...

In this paper, a compact planar Ultra-WideBand (UWB) antenna with notch characteristics is presented which excites multiple notches at different frequencies across the band of operation. Required notch frequencies are obtained with the help of T shaped slots and inverted L-shaped metallic filter element. The notch frequency is varied with the help of slot on ...

In recent years, the technology in the field of wireless networks has been advanced. The mobile users are demanding access to the wireless networks at anytime and anywhere. To ensure the service continuity and to maintain the promising QoS, the decision regarding handoff is to be taken appropriately. The most common criteria for handoff are ...

In the absence of an opportunity to physically interaction with products in the online environment, online information plays a critical role in enabling e-commerce consumers purchase decisions. Thus, it is critical to understand what leads to consumer satisfaction with online information quality. This paper investigates how the quality of certain attributes of e-commerce systems such ...

In this paper, the simulation of cognitive radio system to must detect the presence of primary user to avoid interference. Spectrum sensing to detect the spectrum holes (unused bands of the spectrum) providing high spectral resolution capability. Allowing the secondary users to operate at the spectrum vacant bands which allocated the primary users. They should ...

The emerging technique for communication with in a large VLSI system is a network-on-chip. The fast scaling of technique there has been susceptible faults in the component of the network on chip, thus there is a requirement for technique to maintain circuit reliability. A fault-tolerant NOC (Network-On-Chip) should be having the capacity to detect a ...

There has been a formidable interest in the area of distributed generation in recent times. A wide number of loads are addressed by distributed generators and have better efficiency too. The major disadvantage in distributed generation is voltage control-is highlighted in this paper. The paper addresses voltage control at buses in IEEE 14 bus system ...