Title :
Compact CPW-fed quasi-circular monopole with very wide bandwidth
Author :
Wu, Q. ; Jin, R. ; Geng, J. ; Ding, M.
Author_Institution :
Dept. of Electron. Eng., Shangai Jiao Tong Univ., Shanghai
Abstract :
Presented is a new CPW-fed quasi-circular monopole antenna, which is composed of a triangle and its tangent circle. This smooth monopole structure reduces the dimensions and improves impedance bandwidth dramatically. The CPW ground is bevelled to form a 50 to 100 Omega impedance transformer. The measured bandwidth defined by VSWR<2 is from 2.55 to 18.5 GHz, i.e. a ratio of about 7.3:1. The proposed monopole exhibits a nearly omnidirectional radiation pattern with very compact size and simple structure, which is suitable for various military and commercial wideband applications
Keywords :
antenna feeds; antenna radiation patterns; coplanar waveguide components; electric impedance; microwave antennas; monopole antennas; ultra wideband antennas; 2.55 to 18.5 GHz; 50 to 100 ohm; CPW-fed quasi-circular monopole antenna; coplanar waveguides; impedance bandwidth; impedance transformer; microwave antennas; omnidirectional radiation pattern; ultra wideband antennas;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20072304
