Bias Tee Component Calculator
Enter your operating frequency range and system impedance to size the inductor and capacitor for a bias tee — and check whether a single L/C pair can realistically cover that range before you commit to a board spin.
How is this calculated?
Both components are sized against your minimum frequency, since that's where each has the hardest job: the inductor's reactance is at its lowest there (hardest to block RF), and the capacitor's reactance is at its highest there (hardest to pass RF). If both work at f_min, they only get better as frequency rises — at least until a real inductor's self-resonant frequency intervenes, which is what the feasibility check above accounts for separately.
Target reactances are set from your margin and impedance choice, then solved for component value: