Plasma antenna systems consisting of discharge elements have great practical application prospects due to their ability quickly adjust parameters over a wide range. In this work, the radiation patterns 30 mm long linear surrounded by 16 standard T8 fluorescent lamps were measured using spectrum analyzer with tracking generator. The pattern system is connecting output generator and input receivi...

Ad hoc network which requires no infrastructure equipment such as access points is paid great attention in recent years. In ad hoc network, each host controls its wireless access in a distributed fashion. Generally, carrier sensing is used for detecting channel availability. By using RTS and CTS control frames, MAC sub-layer predicts the channel use and resolves hidden-terminal problem. Broadca...

S D Priya Sankari, PG Scholar, KLN College of Information Technology, Pottapalayam. Abstract The communication industry field is mainly focused by high data transfer and more channel capacity in mobile communication. The monopole resonator antenna which is used to radiate in the omni directional pattern is used for multi broadcasting. Ultra wide band antenna technology is used for transmitting ...

This chapter introduces the concept of multi-beam antenna (MBA) in mobile ad hoc networks and the recent advances in the research relevant to this topic. MBAs have been proposed to achieve concurrent communications with multiple neighboring nodes while they inherit the advantages of directional antennas, such as the high directivity and antenna gain. MBAs can be implemented in the forms of mult...

This chapter describes the development and testing of antenna elements for use in a Multiple-input-multiple-output (MIMO) application. MIMO wireless systems have antenna arrays at both the transmitter and receiver terminals. This project focuses on the terminal MIMO antenna array design. The requirements of the antenna element at the terminal are as yet not well-defined but will include (for co...

The design of array antenna is vital study for today’s Wireless communication system to achieve higher gain, highly directional beam and also to counteract the effect of fading while signal propagates through various corrupted environments. In this study, the design and analysis of a (2x2) microstrip patch antenna array is introduced. It is designed to function in the 5.25 GHz which corresponds...

In this paper, we study the Minimum Latency Broadcast Scheduling (MLBS) problem in wireless sensor networks (WSNs). The main issue of the MLBS problem is to compute schedules with the minimum number of timeslots such that a base station can broadcast data to all other sensor nodes with no collisions. Unlike existing works that utilize the traditional omni-directional WSNs, we target the directi...

Directional Antenna Diversity for Mobile Devices: Characterizations and Solutions

The eavesdropping attack is a serious security threat to a wireless sensor network (WSN) since the eavesdropping attack is a prerequisite for other attacks. Conventional WSNs consist of wireless nodes equipped with omnidirectional antennas, which broadcast radio signals in all directions and are consequently prone to the eavesdropping attacks. Different from omnidirectional antennas, directiona...

A proper antenna to couple to a microstrip Microwave Kinetic Inductance Detector (MKID) is designed and simulated. A twin-slot microstrip-fed inline antenna is designed for frequency band of 600-720~GHz integrated with an elliptical lens and coupled to the MKID. A systematic design procedure for design of such antenna with microstrip inline feeding is presented. Whole structure of lens and twin...