Millimeter-wave broadband antennas with low profile dielectric covers

Affan Aziz Baba*, Raheel M. Hashmi, Karu P. Esselle, Zunnurain Ahmad, Jan Hesselbarth

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

In this paper, a low-profile broadband antenna is presented for 60 GHz applications. It is demonstrated that the entire unlicensed 60 GHz frequency band can be covered using a dielectric based aperture type antenna. The antenna consists of a single-layer dielectric superstrate and an aperture type feed, which are separated by an air-cavity. The diameter of the superstrate is 15 mm, which is 2.75 lambda(0) at the lowest operating frequency of 55.2 GHz. The simulated total efficiency of the antenna is greater than 88% over the entire operating band (55.2 GHz-65 GHz), which is unprecedented relative to medium-to-high gain millimeter-wave printed antenna arrays, used for similar applications. A prototype antenna was constructed, which exhibits a measured peak gain of 19.5 dBi. This value remains greater than 17 dBi over the entire operating bandwidth. The measured 3-dB beamwidths of the proposed antenna remain between 16 degrees to 20 degrees in the E-plane and 19.5 degrees to 25 degrees in the H-plane, respectively. The proposed antenna provides broadside directed radiation patterns with cross-polarization in the order of -30 dB over the entire operating band.

Original languageEnglish
Pages (from-to)186228-186235
Number of pages8
JournalIEEE Access
Volume7
DOIs
Publication statusPublished - 2019

Bibliographical note

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Keywords

  • 60 Ghz frequency band
  • High gain
  • Radiation enhancement
  • Slot antenna
  • Wide bandwidth

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