In many cases (e.g. remote control, medical alarm, home automatization) it is necessary to have a short-range wireless communication which can be realized by small radio modules. Physical connection (wire or cable) between these devices are not required which serves as a big advantage. That's why they are playing a more and more important role in our daily life.
Nowadays the most well-known and spreading wireless technology is declared by the IEEE 802.11 standards, however market demand has induced a technology which supports the communication of simple, but not so frequently rechargeable devices. Protocol ZigBee has efficient energy management thus it provides low energy consumption.
The purpose of my BSc thesis is to introduce the designing of a robust, cheap, ZigBee radio module which uses the 2.4 GHz ISM band. I tested the designed device not only with measurements but I also validated it for ETSI (European Telecommunications Standards Institute) regulations.
In my thesis, I review the most essential high-frequency related theories in microwave engineering. Furthermore I explain the design process of the circuit, the printed circuit board and the antenna which all belong to the module. This thesis contains the results of the measurements as well.
Finally, I summarize the results of the design process, the measurements and I also phrase some development opportunities.