A miniaturized triple-band circularly polarized antenna using meander geometry

Abstract

In this paper, a compact triple-band printed monopole antenna with circular polarization (CP) has been presented for C-band wireless applications. To achieve the triple-band CP response, the top layer of antenna geometry consists of a meander structure and two orthogonal stubs, whereas a ground plane consists of a vertical slot. The 10-dB impedance bandwidth of the proposed antenna is 450, 560, and 830 MHz at center frequencies of 4.1, 5.8, and 6.7 GHz, respectively. The 3-dB axial ratio (AR) bandwidth’s attained around center frequencies is 4.29%, 4.03%, and 3.52%, respectively. Additionally, the proposed design exhibits a miniaturized performance with an overall size of 0.35 × 0.39 × 0.017 λ, where λ represents free space wavelength at smallest CP frequency. Furthermore, the structure has a simple topology, broadside radiation, and sufficient moderate gain. The proposed antenna has been fabricated and its measured responses are in good agreement with the simulated results. © 2021 Informa UK Limited, trading as Taylor & Francis Group.