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Dielectrically embedded flat mesh lens for millimeter waves applications.

Giampaolo Pisano1, Ming Wah Ng, Fahri Ozturk

  • 1The University of Manchester-School of Physics and Astronomy, Manchester, UK. giampaolo.pisano@manchester.ac.uk

Applied Optics
|May 15, 2013
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Summary
This summary is machine-generated.

Researchers developed a novel flat lens using stacked metal meshes. This device mimics classical lenses, offering a robust, low-loss solution for millimeter wave applications like cosmic microwave background instruments.

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Area of Science:

  • Physics
  • Electrical Engineering
  • Optics

Background:

  • Classical lenses are bulky and complex.
  • Subwavelength structures offer potential for novel optical devices.
  • Millimeter wave (mmWave) and sub-terahertz applications require advanced optical components.

Purpose of the Study:

  • To design and fabricate a flat lens using subwavelength periodic metal meshes.
  • To optimize the phase shift across the lens surface to mimic classical lens behavior.
  • To validate the performance of the mesh lens for millimeter wave applications.

Main Methods:

  • Photolithographic techniques were used to create stacked subwavelength periodic metal meshes.
  • A computational code optimized over 1000 transmission line circuits for phase shift control.
  • Radio frequency (RF) performance was characterized using a vector network analyzer and corrugated horn antennas.
  • Finite-element method (FEM) models were used for comparison with experimental data.

Main Results:

  • A W-band mesh-lens prototype was successfully manufactured.
  • Far-field beam patterns demonstrated excellent agreement between measured data and FEM simulations.
  • The mesh lens exhibits low-loss, robust, lightweight, and compact characteristics.

Conclusions:

  • The developed designing tools and manufacturing procedures are validated.
  • The subwavelength metal mesh flat lens is a promising technology for mmWave quasi-optical systems.
  • Potential applications include advanced cosmic microwave background polarization instruments.