High-Gain Dielectric Endfire Antenna by Forward Scattering of Dielectric Spheres

Utpal Dey, Souvik Agasti, Jan Hesselbarth

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


Forward scattering of an electromagnetic wave on a spherical dielectric resonator is applied to enhance endfire directivity of tapered dielectric rod radiators. An analysis of electromagnetic wave scattering using Mie theory shows that the superposition of fundamental transverse electric and magnetic dipole modes of dielectric spheres increases directivity in forward direction. A compact arrangement with four dielectric spheres is shown to increase the directivity of a dielectric slab radiator by more than 6 dB for a prototype antenna operating around 90 GHz, and by almost 4 dB for another antenna operating at 200 GHz.

Original languageEnglish
Pages (from-to)2310-2314
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Issue number12
Publication statusPublished - Dec 2020
Publication typeA1 Journal article-refereed


  • Dielectric waveguide
  • electromagnetic scattering
  • Mie theory
  • millimeter-wave (mm-wave) antenna

Publication forum classification

  • Publication forum level 2

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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