Journal of electromagnetic engineering and science

The Korean Institute of Electromagnetic Engineering and Science (한국전자파학회)
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Photonic-Assisted Reactive-Near-Field Analysis of a 3 dB-Tapered Ka-Band Array Antenna

  • Lee, Dong-Joon (Korea Research Institute of Standards and Science) ;
  • Kang, Jeong-Jin (Department of Information and Communication, Dong Seoul College) ;
  • Kang, No-Weon (Korea Research Institute of Standards and Science) ;
  • Kim, Wan-Sik (LIG Nexl Co. Ltd.) ;
  • Park, Wee-Sang (Department of Electrical and Computer Engineering, Pohang University of Science and Technology) ;
  • Rothwell, Edward J. (Department of Electrical and Computer Engineering, Michigan State University) ;
  • Whitaker, John F. (Center for Ultrafast Optical Science, University of Michigan)
  • Received : 2010.01.08
  • Published : 2010.03.31
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Abstract

A Ka-band microstrip array antenna for wide-range detection of moving targets is analyzed through a photonicassisted reactive-near-field characterization technique. The antenna array employs a 3-dB-tapered feed network to suppress the sidelobe level while retaining a wide azimuth beamwidth for a wide detection range. The relative nearelectric field patterns of the array and its 3-dB-tapered feed lines have been measured using an electro-optic fieldmapping technique for minimally invasive millimeter-wave sensing. A number of typical limitations on the technique, involving bandwidth, low signal-modulation depth, and high laser-induced noise in high-frequency applications, have been overcome by suppressing the carrier portion of the optical interrogation beam.

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References

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