Design of π-Structure Dual-Band Matching Network With Unequal Susceptance Cancellation Stubs

This paper proposes a novel design of a dual-band impedance matching network using unequal susceptance cancellation. It derives and illustrates the interesting property of a stub to cancel unequal susceptances, irrespective of the sign, at any two arbitrary frequencies of interest. This increases design flexibility and ease. To validate the presented theory, a prototype operating at 1.0 GHz and 1.8 GHz, has been fabricated on RO5880 (ϵr = 2.2). The measured results are in good agreement with the simulated ones.