Title :
Compact Tunable Phase Shifters on Screen-Printed BST for Balanced Phased Arrays
Author :
Sazegar, Mohsen ; Zheng, Yuliang ; Maune, Holger ; Damm, Christian ; Zhou, Xianghui ; Jakoby, Rolf
Author_Institution :
Inst. for Microwave Eng. & Photonics, Darmstadt Univ. of Technol., Darmstadt, Germany
Abstract :
Two designs for compact continuously tunable phase shifters are presented employing integrated ferroelectric varactors based on screen-printed barium-strontium-titanate thick film. The circuits are based on left-handed transmission-line topologies that allow to realize very compact modules. The proposed designs have total lengths of 2.1 and 3.8 mm and provide a differential phase shift of more than 360° and a figure of merit of 51°/dB at 10 GHz. Furthermore, the phase shifters are in coplanar strip configuration, making them attractive for systems composed of balanced components.
Keywords :
circuit tuning; coplanar waveguides; phase shifters; varactors; balanced phased arrays; compact continuously tunable phase shifter; compact tunable phase shifter; coplanar strip configuration; differential phase shift; integrated ferroelectric varactor; left-handed transmission-line topology; screen-printed BST; screen-printed barium-strontium-titanate thick film; Ferroelectric devices; Integrated circuit modeling; Metamaterials; Permittivity measurement; Phase shifters; Tunable circuits and devices; Tuning; Barium–strontium–titanate (BST); coplanar strip (CPS); ferroelectric devices; left-handed transmission lines; metamaterials; phase shifters; tunable components;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2011.2171985
