Of course, it’s not quite that simple. A PCB is more than just copper ... To demonstrate this, [FesZ] used an online tool to design a bandpass filter for ADS-B signals. He designed two filters ...

Kyocera AVX’s BP1206 and BP2816 thin-film bandpass filters provide repeatable and reliable RF performance for wireless ...

and end up with a much sharper lowpass filter as well as a bandpass filter. For the bandpass, we’ll need to build up a quick highpass filter as well. Bonus! I claimed last time that the Sallen ...