CHARACTERIZATION AND PHASE COMPENSATION OF A COPLANAR WAVEGUIDE TO COPLANAR STRIP LINE BALUN

摘要

A uni-planar balun that transforms from unbalanced coplanar waveguide (CPW) to balanced coplanar strip line (CPS) is characterized through simulation and measurement. The balun is tested in the normal back-to-back configuration, as a terminated single balun, and the magnitude and phase imbalance are also determined by using a. 3-port test circuit connected to the balun. Etched bond wires are implemented to provide better manufacturing repeatability. A simple technique to correct the phase imbalance of the balun is introduced, and validated through port measurements of the balun connected to the 3-port test circuit, as well as radiation pattern measurements for the balun connected to an etched dipole.