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Design and characterization of an efficient multi-layered circularly polarized microstrip antenna

Published online by Cambridge University Press:  14 April 2015

Pravin R. Prajapati ,
Amalendu Patnaik  and
M. V. Kartikeyan
Pravin R. Prajapati*
Affiliation:
Millimeter and THz Wave Laboratory, Department of Electronics and Communication Engineering, Indian Institute of Technology, Roorkee, Roorkee-247667, India. Phone: +91 8791633827
Amalendu Patnaik
Affiliation:
Millimeter and THz Wave Laboratory, Department of Electronics and Communication Engineering, Indian Institute of Technology, Roorkee, Roorkee-247667, India. Phone: +91 8791633827
M. V. Kartikeyan
Affiliation:
Millimeter and THz Wave Laboratory, Department of Electronics and Communication Engineering, Indian Institute of Technology, Roorkee, Roorkee-247667, India. Phone: +91 8791633827
*
Corresponding author: P. R. Prajapati Email: [email protected]
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Abstract

A novel asymmetric “+” shaped fractal slotted circularly polarized microstrip antenna with a Yagi–Uda structure is proposed. Four asymmetric plus shape slots are embedded symmetrically in the center of all four quadrants of a square patch. To suppress undesirable higher modes, dumbbell-shaped defected ground structure (DGS) is introduced at the ground layer of the antenna. We introduce a method to compensate the reduction in gain occurring due to the presence of DGS, without changing in the overall size of the antenna. A 3 dB axial ratio bandwidth of 4 MHz at center frequency of 862 MHz, 10 dB impedance bandwidth of 13.20 MHz and a gain of 4.25 dB is achieved with the proposed antenna. A laboratory prototype of the proposed antenna is made to cross-verify the simulation results. Very good agreements between the two are obtained. The proposed antenna may prove useful for International Mobile Telecommunication application for designing high-gain arrays.

Keywords

Active array antennas and componentsPower amplifiers and linearizers
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 7 , November 2016 , pp. 1101 - 1109
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

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