Balun bandpass filters represent a critical advancement in radio frequency (RF) circuit design, integrating the dual functions of balanced-to-unbalanced conversion and frequency selection. These ...

Noel Maginnity is a consultant in Carterton, New Zealand. An alternative audio program input is often required at a medium-wave transmission site. During STL maintenance or if the STL fails, it is ...

This audio noise filter circuit is a bandpass filter for audio frequency band. It filters unwanted signals that are lower or higher than the audio frequencies. It has 2 filters: a low pass filter and ...

Unless you hold a First Degree RF Wizard rating, chances are good that coax stubs seem a bit baffling to you. They look for all the world like short circuits or open circuits, and yet work their magic ...

The Fraunhofer Institute for Integrated Circuits IIS has developed digitally tunable and reconfigurable RF filters. In a congested spectrum “devices that send and receive data must function reliably”, ...

Can you buy a working radar module for $12? As it turns out, you can. But can you make it output useful information? According to [Mathieu], the answer is also yes, but only if you ignore the ...