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We have evaluated the AC-DC transfer differences of our thin-film multijunction thermal converters with increased heat capacity under vacuum conditions to improve the low frequency characteristics. µµ The measured thermal time constant at about 0.001 Pa is increased up to 9 s from 3 s measured at ambient pressure. The AC-DC transfer differences evaluated by using a sampling method are less than 1...
We have performed numerical calculation of AC-DC transfer differences of thermal voltage converter at low frequencies using an improved electro-thermal model of single-junction thermal converter (SJTC). A feature of our model is incorporation of the heat capacity of a thermocouple and a range resistor, which play a crucial role at low frequencies. To validate the calculation results, we have measured...
The paper describes a method for measurement of ultra-low frequencies voltage at the range from 0.01Hz to 1Hz. The method based on the square law of the Dual-heater thermal converter using sinθ2 + cosθ2 = 1 equation to evaluate main impact factors causing the measurement errors. The principle and the preliminary results are presented.
This paper provides a short review of radio frequency/microwave power amplifiers (PAs) and their critical role in a modern satellite communication system. Authorspsila original design contributions are also highlighted.
Thick film resistance and capacitance elements have recently come to be used in miniaturized and lightweight electronic instruments. The thick-film magnetic semiconductor (IMS), with a thickness of 80 ??m, is a sintered substance based on ferrite powder and a ruthenium compound. The TMS has both the ferromagnetic and the semiconducting properties of the ferrite and the ruthenium compound. The TMS...
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