Title :
CPW-fed broadband circularly polarized microstrip rectangular slot antenna with triangular fractal slots in tuning stub
Author :
Saini, Rohit Kumar ; Dwari, Santanu
Author_Institution :
Dept. of Electron. Eng., Indian Sch. of Mines, Dhanbad, India
Abstract :
A rectangular slot antenna fed by coplanar waveguide (CPW) for broadband circular polarization is presented. Two circular arc shaped grounded perturbation is introduced at diagonally opposite corners of the rectangular slot to obtain wide axial ratio bandwidth. The axial ratio bandwidth is further improved by using a triangle fractal slots in tuning stub. This slot antenna with triangle fractal slots in tuning stub has been designed and optimized on a FR4 substrate with dielectric constant ε4= 4.3 and substrate thickness h=1.53mm. The simulated results of this antenna exhibits impedance bandwidth 151.79% from frequency range (1.93GHz-12.18GHz) at VSWR ≤ 2 throughout this band and axial ratio band width 39.34% from frequency band (3.6GHz-5.45GHz) at AR ≤ 3dB. The simulated radiation patterns of this antenna are Omni-directional in H-plane and Bi-directional in E-plane.
Keywords :
antenna radiation patterns; broadband antennas; coplanar waveguides; microwave antennas; slot antennas; CPW-fed broadband circularly polarized microstrip rectangular slot antenna; E-plane; FR4 substrate; H-plane; bi-directional radiation pattern; circular arc shaped grounded perturbation; coplanar waveguide; dielectric constant; omni-directional radiation pattern; triangular fractal slots; tuning stub; Bandwidth; Broadband antennas; Fractals; Impedance; Microstrip antennas; Slot antennas; Tuning; CPW-feed; Multiple resonant frequencies; Rectangle slot antenna; Triangle slot fractal in tuning stub;
Conference_Titel :
Applied Electromagnetics Conference (AEMC), 2013 IEEE
Conference_Location :
Bhubaneswar
Print_ISBN :
978-1-4799-3266-5
DOI :
10.1109/AEMC.2013.7045096
