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This paper describes a method for directly generating FMCW signal based on the PLL circuits; mainly by changing the PLL system's frequency divider ratio N rapidly and producing a corresponding control voltage to control VCO to output the FMCW signal. The key of this method is the transition period Δt of divider. Set up simulation model in ADS2011 to simulate, get the conclusion that the smaller the...
In a real-life airplane, there are usually a large number of electronic devices and radiation sources. Equipped in this complex electromagnetic environment, the conducting cables always produce serious impact on the electromagnetic performance of the aircraft system. Therefore, it is of importance to investigate the electromagnetic compatibility (EMC) of the cables. To this end, we propose a simple...
A method of analyzing transmission characteristics of via holes in the time domain is presented in this paper. A suitable analysis model is set up using CST (Computer Simulation Technology). With theoretical analysis, the effect of via structures on signal transmission characteristics could be acquired. The simulation results show that appropriate design for via holes can reduce transmission characteristics...
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