you’ll see there is a lot of difference between active audio filters and passive RF filters, although some of the ideas are the same. Watching the effect different circuit tweaks have in real ...

Don’t design your own; grab cheap and tiny RF amplifier modules and put them on a PCB that fits your needs. These are the grandchildren of the old mini circuits modules that were popular among ...

The transfer of electromagnetic power wirelessly over a distance was not possible in 19 th century, since the electronic systems like autonomous sensors with ambient RF energy were not available.