Design of a Marchand Balun for a Tightly Coupled Dipole Array Using Non-uniform Transmission Lines
Conference
Georgiadis, A, Niotaki, K, Goudos, S et al. (2026). Design of a Marchand Balun for a Tightly Coupled Dipole Array Using Non-uniform Transmission Lines
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Georgiadis, A, Niotaki, K, Goudos, S et al. (2026). Design of a Marchand Balun for a Tightly Coupled Dipole Array Using Non-uniform Transmission Lines
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A Marchand balun is designed based on nonuniform transmission line sections. A third order balun transformer is designed using three non-uniform transmission line sections. The characteristic impedance profile of the sections is optimized applying a convex optimization algorithm implemented with open source tools. A design example is presented for a wideband balun transformer in a tightly coupled dipole array, TCDA, antenna. The obtained VSWR is less than 2.5 from 0.695 GHz to 4.944 GHz for a 7.1:1 bandwidth at broadside.
