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FEASIBILITY STUDY OF HIGH-EFFICIENCY RF-POWER COMBINERS

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
15860
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
15860
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
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: FEASIBILITY STUDY OF HIGH-EFFICIENCY RF-POWER COMBINERS
Agency / Branch: DOD / ARMY
Contract: N/A
Award Amount: $61,162.00
 

Abstract:

MODERN HF/VHF JAMMERS EMPLOY POWER COMBINERS AND MULTIPLE POWER-AMPLIFIER (PA) MODULES TO ACHIEVE A HIGH POWER OUTPUT, CANCELLATION OF HARMONICS, AND GRADUAL DEGRADATION OF PERFORMANCE DUE TO MODULE FAILURE. POWER COMBINERS CAN BE A SIGNIFICANT SOURCE OF POWER LOSS BECAUSE OF RESISTIVE LOSSES, MISMATCH (AMPLITUDE/ PHASE) OF PA OUTPUTS, AND PA INEFFICIENCY DUE TO NONNOMINAL LOAD. CURRENTAND VOLTAGE-SUMMING COMBINERS HAVE NO INTRINSIC LOSSES, BUT PROVIDE NEITHER ISOLATION NOR CONSTANT IMPEDANCE. HYBRID COMBINERS PROVIDE ISOLATION, BUT ARE INEFFICIENT WHEN THE INPUT SIGNALS DIFFER IN AMPLITUDE AND/OR PHASE. DIRECTIONAL AND QUADRATURE COUPLERS PROVIDE CONSTANT IMPEDANCE, BUT ARE INEFFICIENT FOR MISMATCHED AMPLITUDE, PHASE, OR LOAD IMPEDANCE. A VARIATION ON THE LUMPEDELEMENT WILKINSON COMBINER AND ADAPTIVE INTERCONNECTION APPEARS ATTRACTIVE. HOWEVER, EACH TYPE OF COUPLER HAS ITS OWN CHARACTERISTICS, AND A SINGLE TYPE OF COMBINER MAY NOT BE OPTIMUM FOR ALL APPLICATIONS. THE PROPOSED PROGRAM WILL CONDUCT THE GROUND WORK NECESSARY FOR SYNTHESIS AND IMPLEMENTATION OF HIGH-EFFICIENCY POWER COMBINERS. ITS PRINCIPAL COMPONENTS ARE: ANALYSIS OF DIFFERENT COMBINERS IN A COMMON FRAMEWORK, COMPARISON OF THEIR EFFECTS UPON PAS, DETERMINATION OF TRADE-OFFS BETWEEN COUPLER LOSS AND PA EFFICIENCY, AND IDENTIFICATION OF THE MOST PROMISING APPROACHES FOR DEVELOPMENT.

Principal Investigator:

Dr Frederick H Raab
Principal Investigator
8026559670

Business Contact:

Small Business Information at Submission:

Green Mountain Radio Research
50 Vermont Ave - Ft Ethan Alle N Colchester, VT 05446

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