| RF MFCG (Radio Frequencies Explosive Magnetic Flux CompressionGenerator) is a miniaturized electromagnetic pulse generation and radiation devices.It uses MFCG unit directly drive capacitive loads, electromagnetic energy andoscillation in the circuit is formed, and finally radiated out through the high-powerantenna. Electromagnetic pulse generated to cover a wide frequency range(MHz-GHz), and has a high radiation intensity. Since RF MFCG with small size,light weight, easier to radiation pulse characteristics are widely used in military andscientific research in various fields among.About RF MFCG operating characteristics, equivalent circuit and parametersoptimization studies, our predecessors have done a great job and came to a numberof important conclusions. The main contents of this paper to further explore RFMFCG working mechanism, based on the analysis of radiation characteristics of thegenerator, through a variety of ultra-wideband antenna research summary presents aUWB antenna cone, to solve the problem of the radiation efficiency, saving theentire apparatus structure, size, design and optimize the indirect power supplycircuit transformer coupling.Specific tasks include analyzing and discussed RF MFCG the basic theoryand operation mechanism of the generator from the pulse generator to the principleof energy conversion further theoretical research. The method of using theequivalent circuit analysis discussed RF MFCG working status and parameterchanges, the stator coil inductance, mutual inductance of the generator duringoperation change is discussed, which will be coupled back feeding transformerdesign research foundation. Describes some of the important properties of theantenna index of a variety of ultra wideband antenna, and sequentially analyzedthese antennas can be used as a high-power antenna to the possibility of use. Thenaccording to the RF antenna MFCG on all aspects of performance and structure sizeminiaturization requirements, determine Discone antenna for the device mostsuitable radiation antenna. According to the device dimensions and structuralcharacteristics of the antenna design, simulation and measurement of the disk ofthe cone antenna performance indicators to meet the RF radiation MFCG requirements. Presented on MFCG feed circuit acts on two stages of plant operationproblems, describes two common feed method. Analysis of the initial flux for thedevice to create a two feed method when the pros and cons. Circuit analysis methodusing theoretical analysis of the generator to the load fed in two ways, and assumesgenerator electrical parameters, a simple derivation calculation. Finally, transformercoupled feed Pspice simulation systems, analysis of transformer circuit indirect feedsystem parameters, the impact on the output transformer parameters; studiedTransformer pulse modulation system design principles, according to the designrequirements, after deduction calculations, can be determined physical size andtransformer feeding method. |
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