Analogue Szuperheterodyn ISM-band Transceiver for Education

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Dr. Dudás Levente
Department of Broadband Infocommunications and Electromagnetic Theory

From the year of 2015, some subjects of the MSc training will be changed, which have been lectured by the Department of Broadband Infocommunications and Electromagnetic Theory so far. My task was to develop a transmitter-receiver device chain, which is using the superheterodyne principle. This device chain will be the main part of a laboratory, and students have to take measurements on it. The application of the superheterodyne principle gives wide range of opportunities to the developer hands. For example, multiple use of frequency mixers. Because of the measurements for students, I had to plan the whole chain measurable, which means that, I built all the functional blocks (e.g.: gain blocks, filter blocks, and so on) on separatable boards, which easily connectable using SMA connector types. During my work I planned electric circuits and printed circuit boards using schematic and layout designers, then I produced the functional blocks myself to measure them, verifying the right operation of the whole transmitter- and receiver chain.


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