Compact dual-band circularly polarized inverted y-shaped printed monopole antenna with edge ground

Reshmi Dhara; Taraknath Kundu

doi:10.3103/S073527272103002X

Authors

Reshmi Dhara National Institute of Technology Sikkim, India, India
Taraknath Kundu National Institute of Technology Sikkim, India, India

DOI:

https://doi.org/10.3103/S073527272103002X

Keywords:

, Circular polarization (CP), Impedance bandwidth, C and X band.

Abstract

A compact dual-band circularly polarized (CP) printed antenna with microstrip line feed is studied in this paper. It consists of an inverted y-shaped radiator with an edge ground plane on the opposite side of the substrate. The edge ground plane plays important role in impedance bandwidth (IBW) enhancement. In order to enhance the axial ratio bandwidth (ARBW) by a significant amount, the dimensions of the inverted y-shaped radiator are optimized. The value of measured IBW is equal to 4.48 GHz (4.94–9.42 GHz; 62.39%) with the resonant frequency f_r = 7.18 GHz. The proposed design exhibits the simulated IBW of 5.557 GHz (4.933–10.490 GHz; 72.05%) with the resonant frequency f_r = 7.7 GHz. The corresponding simulated ARBWs are equal to 742.5 MHz (f_CP1 = 6.32 GHz, 11.75%) and 1091.8 MHz (f_CP2 = 8.32 GHz, 13.12%) within the range of simulated and measured IBW, respectively. The presented antenna is compact with the optimized dimension of 20×20×1.6 mm³, i.e. 0.54×0.54×0.044λ_gL³, where λ_gL is the guided wavelength at the simulated lower resonant frequency f_gL = 4.933 GHz with size reduction of 39.7%. It is fabricated on the low cost FR-4 substrate with copper cladding. Measurement results validate simulated data from Ansys Electronics Desktop 2020 R1. The maximum simulated peak gain is equal to 4.796 dBi at 8.64 GHz within the CP band. The proposed antenna can be suitable for some portions of C- and X-, and ITU-8 GHz band wireless communication applications.

Author Biography

Reshmi Dhara, National Institute of Technology Sikkim, India

Assistant Professor, Dept of Electronics and Communication Engineering, National Institute of Technology Sikkim, India

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