Decoding FSK transmission recorded by RTL-SDR dongle

In this article I’m about to present the process of decoding previously recorded FSK transmission with the use of Python, NumPy and SciPy. The data was gathered using SDR# software and it is stored as a wave file that contains all the IQ baseband data @ 2.4Msps The complete source code for this project is…

Complex impedance matching using scalar measurements, math and resistors

In this article I’ll present my approach to solving the problem of impedance matching using only scalar measurements, a little bit of complex numbers mathematics (in form of a python script) and resistors of different values. A worked example of 2.45GHz antenna matching to interface a 50 Ohm system is also presented to back up…