Planar Lens–Based Ultra-Wideband Dielectric Rod Waveguide Antenna for Tunable THz and Sub-THz Photomixer Sources

Research output: Contribution to journalArticleScientificpeer-review


  • Alejandro Rivera-Lavado
  • Luis Enrique García-Muñoz
  • Dmitri Lioubtchenko
  • Sascha Preu
  • Kerlos Atia Abdalmalak
  • Gabriel Santamaría-Botello
  • Daniel Segovia-Vargas
  • Professor (Emeritus) Antti Räisänen

Research units

  • Universidad Carlos III de Madrid
  • KTH Royal Institute of Technology
  • Technische Universität Darmstadt
  • Spanish National Geographic Institute


In this manuscript, the use of dielectric rod waveguide antenna (DRW) with an embedded planar lens is proposed as a highly directional alternative to an electrically large hyper-hemispheric silicon lens for emission at millimeter and sub-millimeter wave frequencies. DRW antennas radiate properly if only the fundamental mode is excited to the structure. Since photomixer-based terahertz sources excite many modes, single-lobe radiation patterns are obtained only for lower frequencies of their potential working band. The use of embedded planar lenses is proposed for rectifying the wavefront phase and suppressing such higher-order modes in DRW, allowing an ultra-wideband operation.


Original languageEnglish
Pages (from-to)838-855
Number of pages18
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Issue number8
Publication statusPublished - 15 Aug 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Antenna, Antenna emitter, Dielectric rod waveguide, Embedded dielectric lenses, High power terahertz, Photomixer, THz

ID: 35786267