X-band Left Handed Phase Shifter using Thin Film Ba0.25SR0.75TiO3 Ferroelectric Varactors

Author

Kuylenstierna, Dan ; Ash, Eric ; Vorobiev, Andrei ; Itoh, Tatsuo ; Gevorgian, Spartak

Author_Institution

Dept. of Microtechnology & Nanoscience, Chalmers Univ. of Technol., Goteborg

fYear

2006

fDate

10-15 Sept. 2006

Firstpage

847

Lastpage

850

Abstract

This paper describes the design, modeling, and realization of a tunable left handed (LH) phase shifter using thin film Ba_0.25Sr_0.75TiO₃ (BST) ferroelectric varactors. The unique nature of LH transmission line (TL) metamaterials enables reduced size, compared to conventional loaded line phase shifters realized as right handed (RH) TLs. The prototype LH TL phase shifter fabricated in this work includes 9 LH unit cells. At 10 GHz the phase advance is ~1000 deg without applied bias and under applied 20 V DC bias it tunes to ~750 deg. The Figure of Merit is better than 30 deg/dB over a 22 % bandwidth extending from 8.7 GHz to 10.9 GHz

Keywords

ferroelectric devices; metamaterials; varactors; 10 GHz; 20 V; 8.7 to 10.9 GHz; BST thin film; Ba_0.25Sr_0.75TiO₃; X-band left handed phase shifter; ferroelectric varactors; figure of merit; left handed transmission line; metamaterials; right handed transmission line; Bandwidth; Binary search trees; Ferroelectric materials; Metamaterials; Phase shifters; Prototypes; Strontium; Transistors; Transmission lines; Varactors;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2006. 36th European

Conference_Location

Manchester

Print_ISBN

2-9600551-6-0

Type

conf

DOI

10.1109/EUMC.2006.281052

Filename

4057951