Design of wideband 90° phase shifter using compact CRLH structure

Author

Zhang, Rong ; Lin, Xian Qi ; Wu, Yang Sheng ; Zhang, Jin ; Fan, Yong

Author_Institution

EHF Key Lab. of Fundamental Sci., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2012

fDate

19-20 April 2012

Firstpage

1

Lastpage

4

Abstract

To satisfy several standards of wireless systems, the wideband phase shifters become essential. In this paper, we present the design and testing of a compact wideband 90° phase shifter with small phase error using CRLH transmission line. The wideband phase shifter is obtained by subtracting of two phase shift parts. The properties of the CRLH transmission line are analyzed and the empirical formula is given to determine the phase shift of the transmission line against with the length of the interdigital capacitance. According to the formula, a 90° phase shifter with a phase error of ±3° has been achieved. The implemented phase shifter works from 4.225GHz to 5.709GHz with a small size of less than 35mm×50mm in total. The measured results show good agreement with the simulated results.

Keywords

metamaterials; phase shifters; transmission lines; CRLH transmission line; compact CRLH structure; frequency 4.225 GHz to 5.709 GHz; interdigital capacitance; phase error; wideband 90° phase shifter; wireless system; 90°; CRLH; phase shifter; small size; wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Circuits and System Technology (MMWCST), 2012 International Workshop on

Conference_Location

Chengdu

Print_ISBN

978-1-4673-1893-8

Type

conf

DOI

10.1109/MMWCST.2012.6238154

Filename

6238154