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The effect of the output impedance of peaking power amplifier (PA) on Doherty PAs (DPAs) is analyzed in this paper. In the design procedure of DPAs, the ideal case is that the output impedance of auxiliary PA is infinite at output power back-off (OPBO) level. However, it is almost impossible to realize this perfect condition in broadband DPAs. Therefore, when the output impedance of peaking path deviates...
The nature of carrier traps in polyester (PET) and polyethylene (PE) has been widely investigated by respectively using thermally stimulated current (TSC) and photo-stimulated discharge (PSD). Under non-isothermal technology, the trap depths of Polyester sample for the TSC peaks were about 0.50eV, for the PSD peaks were various from 3.8eV to 4.8eV. The trap depths of polyethylene sample for the TSC...
The distribution of charge trap in polyethylene was studied by means of photo-stimulated discharge (PSD) and thermally stimulated discharge (TSD). The shallow trap of 0.77eV in the analysis of TSD comes from the same trap distribution as the deep trap of the depth from 4.80 to 5.90eV in PSD. The results showed that the trap itself is suffered from thermal erosion in the process of charge released...
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