im designing 2.4GHz filter. i have optimized my filter with murata s-parameter files and spiral inductor in ADS. However, the optimized spiral have SRF within or below the operating frequency so its its shows negative inductance in the operating frequency. i know that the Q will be low due for negative inductance after SRF. what are the impact of using negative inductance for Rf filter?
can i replace the inductor with capacitor to solve this problem?