I need to design a band-pass passive filter with pass band 10kHz~150KHz. One of the needed inductor is 2.2mH. I find there are two choice: Axial type or Can type. But it seems they are designed mainly for EMI filter. May I use them in signal chain filter?
For a 50 Ohm filter, the 2.2mH choke you linked has 7.5Ohm "may" shift a breakpoint up 1 order of magnitude near 1kHz, resulting in 20dB less attenuation below that. Other chokes are available (at higher current ratings not needed) with 0.25 Ohm that will work better for low-frequency rejection. https://uk.farnell.com/hammond/1537n/rf-choke-500uh-5-3-2a-axial/dp/2759969
BTW you can get a perfectly flat Bessel PB response with a 50 Ohm load, albeit -6dB unless you buffer the input to ~ 0 Ohms Here's a simple 4th order approximation.
You could also make it an 8th order active filter. with a quad OA with no chokes.