In: Electrical Engineering
FR4 substrate εr = 4.4, d = 1.6 mm, and tan δ = 0.02, with copper conductors 17 μm thick.
Design a high-pass filter, maximally flat lumped-element filter
having a cutoff at
4 GHz, and an attenuation of at least 20 dB at 3.5 GHz. The
characteristic impedance is 50 Ω.