Compact Analog Phase Shifters using Thin-Film (Ba,Sr)TiO3 Varactors

Author

Chen, L. Y Vicki ; Forse, Roger ; Cardona, Albert H. ; Watson, Thomas C. ; York, Robert

fYear

2007

fDate

3-8 June 2007

Firstpage

667

Lastpage

670

Abstract

This paper describes the realization of compact 360 degree phase-shifter MMICs using thin-film BST varactors in a series cascade of all-pass networks. Unlike conventional delay-line structures, all-pass networks provide constant phase shift with small variation of insertion loss. In similar fashion, very broadband phase-shifters can be implemented by cascading all-pass networks with staggered center-frequencies. Using a thin-film BST technology for the varactors, extremely compact and low-cost phase-shifter structures have been developed. Selected results are shown in the 1-30GHz range.

Keywords

MMIC; phase shifters; thin film capacitors; varactors; all-pass networks; broadband phase-shifters; compact analog phase shifter MMIC; constant phase shift; delay-line structures; frequency 1 GHz to 30 GHz; insertion loss; thin-film BST varactors; Bandwidth; Binary search trees; Capacitance; Frequency; Insertion loss; Phase shifters; Transfer functions; Transistors; Tunable circuits and devices; Varactors; BST; all-pass filters; phase shifters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium, 2007. IEEE/MTT-S International

Conference_Location

Honolulu, HI

ISSN

0149-645X

Print_ISBN

1-4244-0688-9

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2007.380008

Filename

4263905