# Lumped element quarterwave transformers

Everybody knows that a matching network can be built using a quarterwave transformer. E.g. if a load of impedance $$Z_L$$ shall be matched to a source having impedance $$Z_S$$, this can be accomplished by using a transmission line with an electrical length of 90 degrees and characteristic impedance $$Z_0 = \sqrt{Z_S\,Z_L}$$. However, is this also possible using lumped elements?