There is a new breed of RF receivers known as software-defined radios, and they are revolutionizing the way in which people listen to shortwave (SW) radio, or indeed any form of radio broadcast. SDRs ...

Chances are, you’ve actually used one without realizing it. I’m referring to a software-defined radio, and it is the design that most — if not all — modern radios, including automotive and home models ...

As you will see, by using ultrasonics to send and receive the data, we eliminate the need for expensive RF equipment such as high-speed oscilloscopes, spectrum analyzers, vector network analyzers, not ...