Dielectric resonator antenna for Short Range Wireless Communication Applications

Present scenario of communication, all wired ones replacing with wireless. So, to achieve efficient communication in wireless technology, efficient radiators required. One such efficient radiators is Dielectric resonator antenna. The extremely wide spectrum of 3.1 to 10.6 GHz with 15 bands of bandwidth greater than 500 MHz and power limit less than -41.3 dBm/MHz announced by FCC for Ultra wide band. The release of this Spectrum has rapidly increased the research in UWB technology for communications, radar imaging, and localization applications. Radio systems based on UWB technology offer opportunities for transmission of high data rate signals, coding for security and low probability of intercept, especially in multi user network applications .DRA is one of the best antennas for UWB applications due to its attractive features like high radiation efficiency, low dissipation loss, small size, light weight, and low profile. Moreover, DRAs which possess a high degree of design flexibility, have emerged as an ideal candidate for wide band, high efficiency, and cost-effective applications. Second antenna is designed which resonates at 5.5 GHz which is suitable for 802.11a WLAN applications.Third antenna is designed to resonate at two different frequencies one at 2.42 GHz and other at 9.13 GHz