Title :
Circular and Elliptical CPW-Fed Slot and Microstrip-Fed Antennas for Ultrawideband Applications
Author :
Angelopoulos, Evangelos S. ; Anastopoulos, Argiris Z. ; Kaklamani, Dimitra I. ; Alexandridis, Antonis A. ; Lazarakis, Fotis ; Dangakis, Kostas
Abstract :
This letter presents novel circular and elliptical coplanar waveguide (CPW)-fed slot and mictrostip-fed antenna designs targeting the 3.1¿10.6 GHz band. The antennas are comprised of elliptical or circular stubs that excite similar-shaped slot apertures. Four prototypes have been examined, fabricated and experimentally tested, the three being fed by a CPW and the fourth by a microstrip line, exhibiting a very satisfactory behavior throughout the 7.5 GHz of the allocated bandwidth in terms of impedance matching $(hbox VSWR¿2)$, radiation efficiency and radiation pattern characteristics. Measured impedance bandwidths of beyond 175% will be presented.
Keywords :
antenna feeds; antenna radiation patterns; coplanar waveguides; impedance matching; microstrip lines; slot antennas; 3.1 to 10.6 GHz; CPW-fed antennas; circular antennas; elliptical antennas; impedance matching; microstrip lines; microstrip-fed antennas; radiation pattern characteristics; slot antennas; Aperture antennas; Bandwidth; Coplanar waveguides; Impedance matching; Microstrip antennas; Prototypes; Slot antennas; Testing; Ultra wideband antennas; Ultra wideband technology; Circular; coplanar waveguide (CPW); elliptical; microstrip; slot; ultrawideband (UWB);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2006.878882
