A 240 GHZ Polarimetric Compact Range for Scale Model RCS Measurements

Abstract

A fully-polarimetric compact radar range operating at 240 GHz has been developed for obtaining Ku-band RCS measurements on 1:16th scale model targets. The transceiver consists of dual fast-switching, stepped, CW X-band synthesizers driving dual X24 transmit multiplier chains and dual X24 local oscillator multiplier chains. The system alternately transmits horizontal (H) and vertical (V) radiation while simultaneously receiving H and V. Software range-gating is used to reject unwanted spurious responses in the compact range. A flat disk and rotating circular dihedral are used for polarimetric as well as RCS calibration. Cross-pol rejection ratios of better than 45 dB are routinely achieved. The compact range reflector consists of a 60" diameter, CNC machined aluminum mirror fed from the side to produce a clean 27" FWHM quiet zone. In this paper a description of this 240 GHz compact range is provided along with an ISAR measurement example.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2010
Accession Number
ADA533931

Entities

People

  • Guy B. Demartinis
  • Michael J. Coulombe
  • Robert H. Giles
  • Thomas M. Horgan
  • William E. Nixon

Organizations

  • University of Massachusetts Lowell

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acquisition
  • Bandwidth
  • Calibration
  • Data Acquisition
  • Electromagnetic Radiation
  • Frequency
  • Ku Band
  • Measurement
  • Millimeter Waves
  • Models
  • Oscillators
  • Radiation
  • Range Gating
  • Reflectors
  • Scale Models
  • Terahertz Radiation
  • X Band

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Radar Systems Engineering.