Gain And Side Lobe Level Enhancement Of Array Antennas Using Metasurface Superstrates

Keywords

Antenna arrays; Circular Polarization(CP); Crossed-Bowtie antenna; Metasurface Superstrate (MSS); Sidelobe Level (SLL)

Abstract

This paper presents a wide-band circularly polarized antenna, and a systematic procedure for designing antenna arrays comprising of crossed-bowtie (cloverleaf)radiating elements. We show gain improvements ranging from 6.87dB for a single element to 15.84dB for 3×3 and to 20.5dB for 5×5 with Side Lobe Level (SLL)-12.8dB and -11.5dB. The Metasurface Superstrate (MSS)further improves the gain to 18.6dB for 3×3 and 22.4dB for 5×5 and SLL to -20.9dB and -14.7dB. The optimum height for the MSS superstrate is λ/4 to realize the best gain and SLL performance. The realized return loss (S 11 )bandwidth of the single antenna element is 38.5%, and its 3dB axial ratio (AR)bandwidth is 41.5 %. The proposed antenna arrays may be useful for C-band satellite communication.

Publication Date

1-1-2018

Publication Title

2018 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting, APSURSI 2018 - Proceedings

Number of Pages

1503-1504

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/APUSNCURSINRSM.2018.8608427

Socpus ID

85061920833 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85061920833

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