Abstract
In this paper, a novel antenna design comprising planar monopole with fractal slot defected ground structure for circularly polarized radiation is proposed. In the proposed antenna geometry, circular polarization radiation characteristics are obtained by defecting the ground structure with fractal slot. In this approach, CP characteristics are achieved by intensifying the level of cross polar component of the linearly polarized antenna upto a certain level by means of fractal slot inserted in ground structure. Antenna prototype with third order iterative tuning fork shaped fractal slot is fabricated and tested for the validation of simulated results. Parametric studies are also performed to exemplify the process of CP radiations. From the simulated and measured results, it is confirmed that the proposed antenna can be proficiently produced 10 dB return loss bandwidth (BW) nearly ≈37.4%, while 3-dB AR bandwidth (ARBW) is 15.5%, respectively. The proposed antenna can be a credible applicant for LTE Band 13/cellular/PCS /ASW/WiMAX and Wi-Fi applications.
Highlights
INTRODUCTIONThe microstrip antennas are widely employed in the wireless and satellite communication systems for the reason that they offer countless advantages likewise light weighted, small in size, ability of to be integrated with microwave integrated circuits on conformal surfaces
Over the past decades, the microstrip antennas are widely employed in the wireless and satellite communication systems for the reason that they offer countless advantages likewise light weighted, small in size, ability of to be integrated with microwave integrated circuits on conformal surfaces
In circularly polarized microstrip antennas (CPMSA), CP radiation can be realized with the practices of single feed, dual feed or hybrid feed excitation techniques [1]
Summary
The microstrip antennas are widely employed in the wireless and satellite communication systems for the reason that they offer countless advantages likewise light weighted, small in size, ability of to be integrated with microwave integrated circuits on conformal surfaces. A compact hexagonal shaped CP antenna with triangular fractal slots on the ground structure for wide-band applications [10], a linearly polarized CPW-fed octagonal fractal antenna with defected ground structure for super-wideband [11], A low-profile fractal antenna for wearable on-Body WBAN applications [12], an array antenna using defected ground structure shaped with fractal form generated by Apollonius circle [13], and another CP antenna with fractal ground structure [14] have been addressed These CP antennas with fractal structure produce reasonably narrow return loss (RL) and axial ratio bandwidth typically ≤ 10 % and ≤ 5%, respectively with comparable gain profile between 2- 5 dB/dBic. Besides, a proximity coupled asymmetric cross slotted circular patch with Koch curve fractal structure has been reported to improve the antenna performances [15]. In ‘‘Antenna design’’ section the geometrical structure of antenna with fractal ground structure is described; while detailed discussion on simulated and measured results is explained in section ‘‘Results and Discussions’’ followed by conclusive remarks and applications of the proposed in ‘‘Conclusion’’ section
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