A MODIFIED COUPLED-LINE SCHIFFMAN PHASE SHIFTER WITH SHORT REFERENCE LINE | Zendy

Weiwei Zhang | Zendy; Yuanan Liu | Zendy; Yongle Wu | Zendy; Weimin Wang | Zendy; Ming Su | Zendy; Jinchun Gao | Zendy

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A MODIFIED COUPLED-LINE SCHIFFMAN PHASE SHIFTER WITH SHORT REFERENCE LINE

Author(s) -

Weiwei Zhang,

Yuanan Liu,

Yongle Wu,

Weimin Wang,

Ming Su,

Jinchun Gao

Publication year - 2014

Publication title -

progress in electromagnetics research c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 34

ISSN - 1937-8718

DOI - 10.2528/pierc14063003

Subject(s) - line (geometry) , phase shift module , phase (matter) , materials science , physics , mathematics , geometry , quantum mechanics

A coupled-line circuit structure is proposed in this paper to design a modified Schiffman phase shifter with short reference line. Based on the traditional transmission line theory and ABCD parameters, closed-form mathematical equations for electrical and scattering parameters are obtained. Obviously, this proposed coupled-line phase shifter has several advantages such as arbitrary phase difference, easy implementation, and analytical design method. Finally, two examples of microstrip coupled-line phase shifter, which have fractional bandwidth over 45%, are fabricated and measured. Good agreements between the simulated and measured results verify our design.

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