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AN INNOVATIVE CONCEPT FOR A NEW CLASS OF EMP SIMULATORS IS PROPOSED. THE ELECTROMAGNETIC EQUIVALENCE PRINCIPLE IS APPLIED TO PROVIDE A THREAT LEVEL SIMULATION WITH A BANDWIDTH GOAL OF 1 GHZ AND ARBITRARY ANGLES OF INCIDENCE AND POLARIZATION ARE PROVIDED BY SOFTWARE. IT IS ENVIRONMENTALLY SOUND AND IS HIGHLY AUTOMATED. IT IS EXPECTED TO BE LESS EXPENSIVE TO PROCURE AND MAINTAIN THAN CONVENTIONAL ME ...

THIS PROPOSAL CONSISTS OF USING A LOW COST FORMABLE MANDREL MATERIAL WHICH IS CAPABLE OF EASY REMOVAL THROUGH SMALL OPENINGS. THESE MANDRELS CAN BE PURCHASED IN DIFFERENT ALLOY FORMS TAILORED TO WITHSTAND THE REQUIRED CURE TEMPERATURES AND PRESSURES ASSOCIATED WITH GRAPHITE/EPOXY AND GRAPHITE/THERMOPLASTIC COMPOSITE FABRICATION. THIS PROPRIETARY MATERIAL (STANDARD COMMERCIAL ITEM) HAS A COEFFICIEN ...

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. T ...

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 ...

THE DEVELOPMENT OF SIMULATION MODELS OF A DISTRIBUTED SYSTEMS AND THEIR MAPPING INTO A PARALLEL SYSTEM, IS A HIGHLY COMPLEX TECHNICAL TASK BECAUSE OF THE GREAT INFLUENCE ITS VARIOUS ELEMENTS WILL HAVE ON ITS PERFORMANCE. THERE ARE MAJOR TECHNICAL ISSUES INVOLVED IN PERFORMING SUCH COMPLEX SIMULATION EFFORT, INCLUDING UNIQUE REQUIREMENTS SIMULATION MODELS, VARIED ARCHITECTURAL CONCEPTS OF DISTRIBUT ...

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GPS IS PLANNED TO BE USED BY THE U.S. ARMY IN A VARIETY OF TACTICAL SCENARIOS. FIRE CONTROL APPLICATIONS ARE CURRENTLY BEING INVESTIGATED WHERE GPS WOULD BE USED TO TRACK REGISTRATION ROUNDS AND LOCATE RADIOSONDES. SINCE GPS IS A RADIONAVIGATION SYSTEM, ITS EFFECTIVENESS IN A TACTICAL ENVIRONMENT IS LIMITED BY ITS SUSCEPTIBILITY TO ELECTRONIC COUNTERMEASURES (ECM). IT IS PARTICULARLY DIFFICULT TO ...

A PORTABLE, LOW COST FM-CW DOPPLER WEATHER RADAR IS PROPOSED TO PROVIDE "REAL-TIME" METEOROLOGICAL DATA IN THE FIELD. SUCH A SYSTEM WOULD ASSIST BATTLEFIELD DECISION MAKING BY MONITORING CONDITIONS PERTINENT TO MICROWAVE DUCTING, ARTILLERY CONTROL, AND DETERMINING LOCAL WEATHER. CURRENT DOPPLER WEATHER RADARS TEND TO BE PULSED, VERY LARGE, AND TO COST MILLIONS OF DOLLARS; THEY REQUIRE A LARGE OPER ...

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