Reduced Height Waveguide Limiter Using Nanotube Technology

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-08-C-7802
Agency Tracking Number: B073-035-0155
Amount: $99,997.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: MDA07-035
Solicitation Number: 2007.3
Small Business Information
7001 Shallowford Road, Chattanooga, TN, 37421
DUNS: 194646782
HUBZone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Benjamin Simmons
 Principal Investigator
 (423) 894-4646
Business Contact
 Reba Pap
Title: CEO
Phone: (423) 894-4646
Research Institution
The solid state semiconductor technology in radar systems supporting the U. S. Army's ballistic missile defense program increases its vulnerability to the effects of high power, fast rise-time EMP, HPM, and UWB pulses. Recent research has shown that using carbon nanotubes (CNTs) can greatly improve the performance of a limiter. Improvements upon a previous X-band waveguide plasma limiter can be made by utilizing arrays of CNTs in a reduced height waveguide. This configuration offers several advantages over the current device. First, the CNTs offer greater field enhancement and survivability compared to metallic point electrodes, resulting in a faster reaction time, lower spike leakage, and greater reliability. Second, the reduced height waveguide will increase the electric field across the spark gap, which will also decrease the reaction time and reduce the spike leakage. Third, the use of CNT arrays allows the field enhancing electrodes to be present over the entire width of the waveguide on both of the H-plane surfaces without introducing significant insertion loss, leading to a reduction in flat leakage. Using a CNT array as a field enhancing electrode in a plasma limiter promises to offer faster reaction time, higher power handling capability, and greater reliability than existing systems.

* information listed above is at the time of submission.

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