Anechoic Chamber Simulation Tool using Integrated FDTD and SBR Ray Tracing

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: F04611-02-C-0033
Agency Tracking Number: 011XP-0866
Amount: $749,693.00
Phase: Phase II
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
315 S. Allen St., Suite 222, State College, PA, 16801
DUNS: 945483733
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Joseph Schuster
 Electromagnetic Analyst
 (814) 861-1299
Business Contact
 Raymond Luebbers
Title: President
Phone: (814) 861-1299
Research Institution
Accurate analysis of electromagnetic anechoic chambers is a challenging problem. The geometry is complicated and includes multiple antenna radiators, systems under test (SUT), supporting structures, and absorber. Furthermore the frequency range isextensive, traversing a broad range from 50 MHz to 18 GHz. For the large chamber (264 x 250 x 70 feet) of the Benefield Anechoic Facility (BAF) this means the chamber size in wavelengths varies over a very large range over which different calculationmethods must be applied for good accuracy. Our approach is that for the lower range of frequencies the finite difference time domain (FDTD) method will be used to analyze the entire anechoic chamber. At the higher frequencies shooting ray methods can beused. Both methods will be integrated under a single graphical user interface which will allow user control of the excitation antennas, system under test geometry, and calculation parameters. The graphical user interface will also provide display offields over a variety of surfaces inside the chamber and straightforward comparison with measured fields for validation. The ability to assess the effects of absorber reflection on the illumination of the system under test will be an important capabilityof the proposed software tool.

* Information listed above is at the time of submission. *

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