nobchaThe front-end filter of this receiver originally used a two-stage staggered configuration, but I switched to a three-stage Chebyshev design to improve the skirt characteristics. This resulted in better attenuation performance in the FM broadcast band and the upper image frequency range.
Update: What I learned about the front end filter instead of ２ stages stagger resonator after assembling the PCB circuit.
A project log for I Built an Airband Receiver Around a $1 Radio IC
What happens when you combine the RF section of a cheap portable radio with a modern DSP receiver chip? TA2003&Si4732.
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