I don't think so, because those types of filters only work if the wavelength (lamda) of the signals approach the dimensions of the elements/conductors ( for example lambda/4 stubs etc.) A 20kHz signal would have a wavelength of c/f = 15 kilometers ! (in vacuum). On a conductor the wavelength is a bit different, but still way too big to realize such a Microstrip filter for audio, unless you're willing to build such a big PCB... ;)
For audio, just use op. amp. with capacitors and resistors like everyone is doing. It is even smaller than 50GHz microstrip filter. Google for Sallen-Key filters
@@davidbrooks8621 the problem with capacitors in audio filters is the introduction of signal phase shifting, delay, and distortion at the filter cut off point.
@@chasepe5762 Every analog filter design with capacitors or inductors has the problem you mentioned. Use it first with wider bandwidth and then use a DSP and symmetric FIR filter and the job is done. Any way all the stuff with microstrips is for microwave frequency and not audio freq.
Great video, thanks for sharing it publicly!
Can these microstrip filters be applied to +/-5v 0khz to 20khz range audio signals with minimum phase change?
I don't think so, because those types of filters only work if the wavelength (lamda) of the signals approach the dimensions of the elements/conductors ( for example lambda/4 stubs etc.)
A 20kHz signal would have a wavelength of c/f = 15 kilometers ! (in vacuum).
On a conductor the wavelength is a bit different, but still way too big to realize such a Microstrip filter for audio, unless you're willing to build such a big PCB... ;)
@@thomasschneider6012 thanks for the response! Maybe some day in the future it can be engineered
For audio, just use op. amp. with capacitors and resistors like everyone is doing. It is even smaller than 50GHz microstrip filter. Google for Sallen-Key filters
@@davidbrooks8621 the problem with capacitors in audio filters is the introduction of signal phase shifting, delay, and distortion at the filter cut off point.
@@chasepe5762 Every analog filter design with capacitors or inductors has the problem you mentioned. Use it first with wider bandwidth and then use a DSP and symmetric FIR filter and the job is done. Any way all the stuff with microstrips is for microwave frequency and not audio freq.