A plane-wave beam-steering lens design using microstrip switched-line phase shifters

H. J. Park, D. H. Lee, M. Kim, D. S. Eom, Y. K. Chang

Research output: Contribution to journalArticlepeer-review


A compact beam-steering lens design appropriate for millimeter-wave and submillimeter-wave applications is experimentally verified with an X-band test model. The lens achieves coupling to plane-wave beams through arrays of patch antennas placed on its two outer surfaces. The isolation between input and output antennas is accomplished by inserting a metal ground plane in the middle of the lens. The two closest patch antennas on the front and the backside are connected together with microstrip circuits that include switched-line phased shifters and interconnecting vias through the lens substrate. Three different X-band 100-element plane-wave microstrip lenses that use passive delay lines instead of actual phase-shifters were fabricated to successfully demonstrate the beam-steering angles of 20 and 40 degrees. From a separate waveguide measurement on the unit-cell element only, the insertion loss of the lens was estimated to be approximately 3.5 dB with bandwidth of 2% at 10 GHz.

Original languageEnglish
Pages (from-to)117-124
Number of pages8
JournalInternational Journal of Infrared and Millimeter Waves
Issue number1
Publication statusPublished - 2005 Jan


  • Beam-steering lens
  • Patch antenna
  • Phase shifter

ASJC Scopus subject areas

  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)
  • Electrical and Electronic Engineering


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