Ka-Band Antenna With High Circular Polarization Purity And Wide Ar Beamwidth

Keywords

Circularly polarized antenna; high-polarization purity; Ka-band antenna array; wide axial-ratio (AR) angular beamwidth antenna

Abstract

This letter presents the design of a wideband circularly polarized antenna, operating at Ka band. The proposed antenna comprises a circular microstrip patch antenna that is coupled to a microstrip feedline through a modified L-shaped aperture slot. The antenna radiates a wideband right-hand circularly polarized wave with high polarization purity and a wide axial ratio (AR) angular beamwidth. A 4 × 4 antenna subarray has been designed, fabricated, and measured to validate the proposed concept. The array exhibits a reflection coefficient S11, <-10 dB over the frequency band 27-31 GHz. Moreover, the 4 × 4 antenna subarray yields a high level of polarization purity, as well as a flat measured AR ≤ 1.15 dB over the frequency range 27.55-30.45 GHz (10 % bandwidth).

Publication Date

9-1-2018

Publication Title

IEEE Antennas and Wireless Propagation Letters

Volume

17

Issue

9

Number of Pages

1697-1701

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/LAWP.2018.2864172

Socpus ID

85051410685 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85051410685

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