A new output structure for class E power amplifier (PA) is proposed in this paper. A series LC resonator circuit, tuned near the second harmonic of the operating frequency is added to the output circuit. This resonator causes low impedance at the second harmonic. The output circuit is designed to shape the switch voltage of the class E amplifier and lower the voltage stress of the transistor. T...

In this paper, the output electric pulse characteristics of gallium arsenide photoconductive semiconductor switch (GaAs PCSS) with bias voltage 20 kV and width about 100 ns are studied. By designing reflection transmission optical paths, absorption rate trigger GaAs PCSS at a wavelength 1064 nm was measured to be 24.8%. When is 16 kV-20 kV, avalanche multiplication rates carriers calculated res...

In this paper, a range-gated LIDAR system utilizing an LN crystal as the electro-optical switch and SCMOS (scientific complementary metal oxide semiconductor) imaging device is designed. To achieve operations, we utilize two polarizers (LiNbO3) to form switch. The optical realized by applying pulse voltage at both ends of due crystal’s conoscopic interference effect effect. advantage that low-b...

in this research, the structural behavior of timber and concrete sleepers in a standard railway turnout is evaluated, in the case of raising speed. in approaching this evaluation, current practices in the structural analysis of sleepers are surveyed and then, the sensitivity analysis with abaqus software is made based on selected criteria (bending and shear stresses as well as contact pressure)...

Ensuring service continuity in safety critical applications is crucial. In some of these applications, multilevel converters play a vital role. this regard, research work presents self-healing fault-tolerant control approach to ensure the resiliency neutral-point clamped converter when semiconductor component encounters an open circuit fault. The defective can be power switch or clamping diode....

We have theoretically studied the effect of deterministic temporal control of spontaneous emission in a dynamic optical microcavity. We propose a new paradigm in light emission: we envision an ensemble of two-level emitters in an environment where the local density of optical states is modified on a time scale shorter than the decay time. A rate equation model is developed for the excited state...