Fundamental everyday RF utilities. Type any input — cards auto-update.
Pi-pad Attenuator (symmetric)
Matched pad for a single reference impedance Z0. Enter target attenuation to synthesise, or enter resistors to analyse.
Auto-solve
T-pad Attenuator (symmetric)
Matched pad for a single reference impedance Z0. Enter target attenuation to synthesise, or enter resistors to analyse.
Auto-solve
L-pad Match (2 resistors)
Impedance match between two real impedances using one series and one shunt resistor. Auto-selects topology (shunt at IN if Z2>Z1, else shunt at OUT).
Auto-solve
Potential Divider (Vout, I, R1, R2)
Ideal 2‑resistor divider. Edit Vin/R1/R2 to analyse Vout and current, or edit Vout to auto-adjust the divider ratio.
Auto-solve
Reserve
Reserve
Reserve
Reserve
Reserve
Reserve
Ground-backed CPW Impedance
Quasi-TEM characteristic impedance and effective permittivity for a grounded coplanar waveguide (signal trace with side grounds, backed by a ground plane).
Auto-solve
Microstrip Impedance
Wadell/Wheeler closed-form approximation including copper thickness correction. Edit Z0 to solve for width w.
Auto-solve
Microstrip Optimal Mitre
Douville & James empirical optimum for a 90° microstrip bend. Returns mitre diagonal M (mm).
Auto-solve
Stripline Impedance (asymmetric)
Asymmetric stripline approximation (Wadell form): edit Z0 to solve for width w. Stripline εeff ≈ εr.