Design and development of microstrip fed compact planar antennas for ultra wideband applications

Abstract

This research work investigates innovative methods in the design and development of newlinemicrostrip-fed compact planar antennas exhibiting linear and circular polarization for newlinewideband and narrowband UWB applications. Experimentations on modified partial newlineground with corner beveling adopts a circular patch antenna to operate in ultra newlinewideband operating frequencies. Further, truncations deployed on a circular radiating newlinepatch along with the asymmetric microstrip feed manifest circular polarization in the newlineradiation characteristics. Studies prove that the axial ratio bandwidth enhancement is newlinepossible by providing radial slits on a truncated circular patch and by incorporating newlinenotches on the partial ground plane. There exist few applications viz. WLAN, newlineWiMAX etc. which have been allotted the same frequency bands within the UWB and newlinemay cause potential interference. At this juncture, UWB antennas with band-notched newlinecharacteristics are preferred to nullify the interference. Consequently, this research newlinetargets band-notched CP antennas that exhibit circular polarization. U-shaped and Cshaped newlineslots are embedded to achieve the band rejection attributes. The features of newlineUWB technology has now emerged with developing a new system of communication newlineto identify devices and to track the location of objects using portable gadgets. Hence newlinethis study also focuses on developing microstrip-fed planar UWB antennas for newlinespecific location tracking applications. Rectangular-shaped slotted ground is utilized newlineto radiate two narrow bands in the UWB band. All the antennas have been fabricated newlineon compact FR4 substrate. In all the research experimentations, critical antenna newlineparameters are simulated and measured to verify and analyze their performance.