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The article considers the method for improvement of directional couplers on coupled microstrip lines through compensation of phase velocity difference in symmetric and asymmetric excitation modes due to implementation of sawtooth lines.
The article describes the simulator of the reception portion of single photon communication line used in cryptography. The simulator is designed for investigation of parameters and characteristics of semiconductor photodetectors in the Geiger mode of operation. The program allows selecting the optimal operation mode of the detector based on a specific type of photodiode.
The article describes the simulator of the transmitter portion of single-photon communication line used in cryptography. The simulator is designed for investigation of parameters and characteristics of semiconductor lasers. The program simulates measuring instruments used in real experiments.
This article describes application of logarithmic amplifier, which can be used to design the device for measuring the complex reflection coefficient (CRC) of the microwave range terminals. The methods for measuring the complex reflection coefficient by the sensor, parameters of which are specified during the calibration, are considered here. The sources of measurement uncertainty are analyzed. The...
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