Wideband circularly polarized antenna for dual‐band operation

In this paper, we propose a wideband antenna with circular polarization (CP) characteristics in two different bands. The proposed antenna consists of two radiator elements on the top layer of the substrate and a feeding structure on the bottom layer of the substrate. A square wide slot with 45° rota...

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Bibliographic Details
Published inMicrowave and optical technology letters Vol. 63; no. 1; pp. 286 - 294
Main Author Sung, Y.
Format Journal Article
LanguageEnglish
Published Hoboken, USA John Wiley & Sons, Inc 01.01.2021
Wiley Subscription Services, Inc
Subjects
Broadband
Circular polarization
circularly polarized antenna
dual‐band CP antenna
Frequencies
Ground plane
Patch antennas
Radiators
Resonant frequencies
Slits
slot antenna
Substrates
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Summary:In this paper, we propose a wideband antenna with circular polarization (CP) characteristics in two different bands. The proposed antenna consists of two radiator elements on the top layer of the substrate and a feeding structure on the bottom layer of the substrate. A square wide slot with 45° rotation achieves low resonant frequency. High resonant frequency is formed by a square patch implemented in a square slot. To obtain CP characteristics in the low‐frequency band, a pair of opposite edges of the ground plane/substrate is cut off. By applying a pair of slits to the diagonal part of the patch antenna, good CP performance can be obtained in the high‐frequency band. The measured 3‐dB axial ratio (AR) bandwidths are 11% and 10.4% in two different bands, respectively. Right‐handed CP (RHCP) characteristics are exhibited in both bands; these measurements are congruent with the simulated data.
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.32576