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Reindeer skin clothing has been an essential component in the lives of indigenous people of the arctic and sub‐arctic regions, keeping them warm during harsh winters. However, the skin processing technology, which often conveys the history and tradition of the indigenous group, has not been well documented. In this study, NMR spectra and relaxation behaviors of reindeer skin samples treated with a...
In this paper, an L-band miniaturized frequency source which is designed and fabricated with three-dimensional packaging technology- LTCC (Low Temperature ceramic co-fired) is described. The structure of DDS+PLL is selected to increase frequency switching rate. The phase-locked loop, DDS, and low pass filter are reasonable designed to decrease phase noise. The testing results shows: frequency-hopping...
In this paper, an improved LTCC multi-layer band-pass filter which based on network synthesis of lumped parameter element, is introduced. In order to set up the finally model of multi-layer filter, ADS is used to get the initial value of components and HFSS is serviced to model and optimize the filter. The simulate results from ADS and HFSS also reach the expected goals: the pass-band loss below 0...
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