Miniaturized 3D printed balun using high-k composites

摘要

This paper presents a method to miniaturize a balanced-to-unbalanced (balun) transition using 3D printing while utilizing high permittivity polymer composites. The balun is a rat-race hybrid coupler utilizing three ports designed with a stack of ABS, high-k composite material, and LCP with permittivity of 2.6, 8.45, and 3.14 respectively. The balun is approximately 1.2 cm wide with a 3 dB power split and a 180 degree phase difference.