Title :
CPW-fed slot antenna with fractal tuning stub for wideband circular polarization
Author :
Gosalvitr, Jeera ; Mahatthanajatuphat, Chatree ; Akkaraekthalin, Prayoot ; Chaimool, Sarawuth
Author_Institution :
Fac. of Eng., King Mongkut´´s Univ. of Technol. North Bangkok, Bangkok, Thailand
Abstract :
Based on the use of the fractal tuning stub and slot radiator, a wideband circularly polarized coplanar waveguide (CPW)-fed slot antenna with fractal tuning stub is presented. The fractal tuning stub has been designed to enhance widely the impedance bandwidth. Moreover, in order to achieve the extended axial ratio bandwidth, the slot radiator is etched and verified on the upper slot. The proposed antenna attains an overlapped bandwidth (axial ration ≤ 3 dB and return loss ≤ 10 dB) of 45% (2.25-3.57 GHz) in measurement.
Keywords :
coplanar waveguides; polarisation; slot antennas; CPW-fed slot antenna; extended axial ratio bandwidth; fractal tuning stub; frequency 2.25 GHz to 3.57 GHz; impedance bandwidth; return loss; slot radiator; wideband circular polarization; wideband circularly polarized coplanar waveguide; Antenna measurements; Antennas; Fractals; Microstrip; Tuning;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2011 8th International Conference on
Conference_Location :
Khon Kaen
Print_ISBN :
978-1-4577-0425-3
DOI :
10.1109/ECTICON.2011.5947810
