Wideband Circularly Polarized Antenna And Low-Cost Phase-Shifters Using Partially Transmitting Surface

Keywords

Circular Polarization (CP); Crossed-Bowtie antenna; Low-cost Phase shifters; Partially Transmitted Surface (PTS)

Abstract

This paper presents a design for a circularly polarized (CP) antenna and a low-cost phase shifting mechanism using a partially transmitting surface (PTS). Both the return loss (S11) and the axial ratio (AR) bandwidth enhancement is achieved by using a partially transmitting surface (PTS) type of superstrate, placed above a crossed-Bowtie shaped antenna with cloverleaf arms. Designs for achieving a continuous phase variation, ranging from either (i) 10° to 70° (ii) or 10° to 43° are presented, the former with a wider phase range of 60° but a relatively narrow impedance matching bandwidth, as compared with the latter design whose phase range is 33°, but the impedance bandwidth is wider. The realized return loss (S11) bandwidth of the antenna is 38.5%, and its 3dB axial ratio (AR) bandwidth is 41.5 %. Furthermore, the gain of the antenna is enhanced in the band of 4.2 to 6.2 GHz via the use of the PTS superstrate.

Publication Date

12-19-2017

Publication Title

2017 International Symposium on Antennas and Propagation, ISAP 2017

Volume

2017-January

Number of Pages

1-2

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/ISANP.2017.8228806

Socpus ID

85046478922 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85046478922

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