Accession Number:

ADA533931

Title:

A 240 GHZ Polarimetric Compact Range for Scale Model RCS Measurements

Descriptive Note:

Conference paper

Corporate Author:

MASSACHUSETTS UNIV LOWELL SUBMILLIMETER-WAVE TECH LAB

Report Date:

2010-10-01

Pagination or Media Count:

7.0

Abstract:

A fully-polarimetric compact radar range operating at 240 GHz has been developed for obtaining Ku-band RCS measurements on 116th 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.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE