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FEASIBILITY STUDY FOR INTEGRATED ANTENNA-AMPLIFIER NETWORK

Award Information

Agency:
Department of Defense 		Branch:
Army 		Award ID:
9764 		Program Year/Program:
1991 / SBIR
Agency Tracking Number:
9764 		Solicitation Year:
N/A 		Solicitation Topic Code:
N/A 		Solicitation Number:
N/A
Small Business Information
Green Mountain Radio Research Company
77 Vermont Avenue Colchester, VT 05446-3121
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1991
Title: FEASIBILITY STUDY FOR INTEGRATED ANTENNA-AMPLIFIER NETWORK
Agency / Branch: DOD / ARMY
Contract: N/A
Award Amount: $525,000.00
 

Abstract:

OPERATION OF A JAMMER TRANSMITTER FROM A SMALL PLATFORM (RPV OR JEEP) NECESSITATES THE USE OF ELECTRICALLY SHORT ANTENNAS SUCH AS SHORT WHIPS AND SMALL LOOPS. THE CONVENTIONAL APPROACH USES A POWER AMPLIFIER DESIGNED FOR A 50-OHM LOAD AND AN ANTENNA TUNER THAT MATCHES THE ANTENNA-INPUT IMPEDANCE TO OHMS. HOWEVER, THE RAPID FREQUENCY CHANGES REQUIRED BY JAMMERS PRECLUDE THE USE OF ANTENNA TUNING. THE PROPOSED PROGRAM IS A FEASIBILITY STUDY AND SYSTEM DESIGN FOR A NOVEL APPROACH THAT INTEGRATES THE POWER AMPLIFIER (PA), ANTENNA, AND MATCHING NETWORK. THE ANTENNA ITSELF IS OPTIMIZED TO THE EXTENT POSSIBLE (GIVEN SIZE CONSTRAINTS) FOR MINIMUM VSWR. THE FILTER/MATCHING NETWORK ATTENUATES HARMONICS FROM THE PA AND BRINGS THE VSWR TO A REASONABLE LEVEL (E.G., <2:1) WITHIN ITS FREQUENCY BAND. A PIN-DIODE NETWORK SELECTS THE APPROPRIATE FILTER/MATCHING NETWORK FOR THE FREQUENCY OF OPERATION. AN OVERRATED PA DELIVERS THE SPECIFIED POWER INTO THE APPROXIMATELY MATCHED LOAD IMPEDANCE. THE FET PA ACHIEVES MAXIMUM EFFICIENCY BY OPERATING IN CLASS D AT HF AND SATURATED CLASS C AT VHF. A SWITCHING REGULATOR AND CONTROL UNIT MAINTAIN THE SPECIFIED OUTPUT POWER AND MAXIMUM EFFICIENCY IN SPITE OF VARIATIONS IN ITS LOAD IMPEDANCE.

Principal Investigator:

Frederick H Raab
8026559670

Business Contact:

Small Business Information at Submission:

Green Mountain Radio Research
50 Vermont Ave - Ft Ethan Alle Winooski, VT 05404

EIN/Tax ID: 784654312
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No