Lumped element 180° Wilkinson dividers and a rat-race divider

A lumped element 180° Wilkinson divider consisting of 11 elements was presented in 2003. It used a conventional Wilkinson divider, a-90° and a+90° phase shifter of π-and T-type. In this paper, that of 10 elements is newly presented. Frequency characteristics of the two 180° Wilkinson dividers and those of a rat-race divider known as an out of phase circuit are discussed.

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