Frequency conversion is a critical function in all wireless systems. A key component used to accomplish this is the mixer. Designers need to understand different mixer topologies and specifications in order to meet their system requirements. This webinar provides a brief overview of frequency conversion and introduces the mixer as the component used to accomplish this function.
Our new interactive switching mixers demonstration is now available here on RFMentor.com. In the brief video log below, I go through some of the interesting observations that you can make with this new tool. You can use the tool right here on RFMentor.com.
This interactive web page allows you to look at the output waveforms from a switching-type mixer, as well as a pure multiplication. You can change the RF and LO frequencies and update the graph.
This demo is included in the Online RF Technology Certification program from Besser Associates.
These lecture notes provide comprehensive coverage of mixer types as used in RF and microwave applications. Three approaches to producing the multiplication of two signals are described: using nonlinear behavior of a diode or transistor, switching, and sampling. Major mixer topologies are also introduced. These notes may be more detailed than what many people are looking for, but they are still worth reading over to gain an understanding of the different mixer strategies.
This app note gives a good understanding of the operation of switching type mixers. "Switching type" refers to the implementation of the mixing operation by using the diode or transistor as a switch that turns the RF signal on and off or inverts its polarity at the LO frequency. Another type of mixer implementation is to bias the diode so that it operates in the square law region so that the output includes the square of the input.
In this 5th Edition, the author continues to evaluate various novel techniques and design methods for the modulation and transmission of digital data, allowing the readers to gain a firm understanding of the processes needed to effectively design wireless data link communication systems. Since the author regularly runs industry seminars based on this book, he is continuously updating the book material. This edition includes thorough updates of all chapters including all concepts and revised and new figures.