A Novel Multi-Octave Differential Power Divider

In this white paper, a novel, multi-octave differential power divider is described. The power divider circuit is based on a new kind of Magic-T circuit composed of a balun and two parallel coupled transmission lines.

Results show that the proposed Magic-T circuit can achieve octave bandwidth with excellent isolation and balance. This fundamental Magic-T block is then used to create a multi-section 180-degree power divider capable of multi-octave performance. A 2-12 GHz, 7-section design is experimentally evaluated which exhibits excellent performance in terms of isolation, return loss, insertion loss and amplitude/phase balance.