SITIS Archives - Topic Details
Program:  SBIR
Topic Num:  AF071-043 (AirForce)
Title:  New Directed Energy (Millimeter Wave) Power Density Meters to Determine
Research & Technical Areas:  Information Systems, Sensors, Weapons

  Objective:  Develop a millimeter wave power density meter that can measure up to 100 GHz, has an accuracy better than + 0.4 dB and can be used in fields greater than 1 W/cm2.
  Description:  Directed energy nonlethal weapons, such as the Active Denial System (Vehicle Mounted or Airborne) use millimeter wave technology. Currently manufactured power density meters measure up to 40 GHz with reported accuracies of + 1 dB. Unfortunately, there is risk of damage to these meters when the incident power density is greater than approximately 100 mW/cm2 and an inability to accurate measure the dose critical to experiments that determine the safety requirements for potential exposure. Such specifications are often limiting when highly accurate field measurements are required. When using other technologies, such as implementing an open-ended waveguide, measuring the effective area of is difficult and is frequency dependent. Again it is unfortunate but there exist no known models to calculate this effective area. Our requirements are for ease of usability, a single operator device capable of 100GHz with an accuracy better than + 0.4 dB that can be used with fields greater than 1 W/cm2.

  PHASE I: Determine the feasibility of designing a millimeter wave power density meter that can measure up to 100 GHz, has an accuracy better than + 0.4 dB and can be used in fields greater than 1 W/cm2. Breadboard a prototype version of the power density meter.
  
  PHASE II: Develop, demonstrate, and validate an operational millimeter wave power density meter that was designed during Phase I.

  DUAL USE COMMERCIALIZATION: Military application: Used by the government, specifically the millitary, to measure incident power density. Commercial application: Also use by commercial cell phone industry, academia, and government to measure incident power density. Accurate dosimetry is essential for all microwave research and health hazard assessments.

  References:  1. International EMF Dosimetry Project (http://www.brooks.af.mil/AFRL/HED/hedr/int_emf.html) 2. Durney CH, Massoudi H and Iskander MF (1986): Radiofrequency Radiation Dosimetry Handbook (Fourth Edition), USAFSAM-TR-85-73, USAF School of Aerospace Medicine, Brooks Air Force Base, TX 78235.

Keywords:  Directed Energy, Radio Frequency Radiation, Microwave Radiation, Dosimetry

Additional Information, Corrections, References, etc:
Ref #2: available at: http://www.brooks.af.mil/AFRL/HED/hedr/reports/handbook/contents.htm
Ref #2: available at: http://www.brooks.af.mil/AFRL/HED/hedr/reports/handbook/contents.htm

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