Design of microwave wide-band quadrature hybrid using planar transformer coupling method

Author

Tung, Wei-Shin ; Wu, Hsu-Hsiang ; Chiang, Yi-Chyun

Author_Institution

Inst. of Electron. Eng., Chang-Gung Univ., Taiwan

Volume

51

Issue

7

fYear

2003

fDate

7/1/2003 12:00:00 AM

Firstpage

1852

Lastpage

1856

Abstract

A lumped-element quadrature hybrid consisting of two-section inductive coupled π-networks is presented. A synthesizing method involving a new set of design equations are also developed to realize the proposed hybrid with very good balance in both magnitude and phase between the output ports over a 38% fractional bandwidth. The measurements of the two prototypes show quite good agreement with the theoretical predictions. The proposed hybrid is compact and suited to be implemented by conventional microwave-integrated-circuit technology.

Keywords

coupled circuits; inductors; microwave integrated circuits; waveguide couplers; design equations; fractional bandwidth; microwave wide-band quadrature hybrid; microwave-integrated-circuit technology; output ports; planar transformer coupling method; synthesizing method; two-section inductive coupled π-networks; Bandwidth; Equations; MMICs; Microwave circuits; Microwave integrated circuits; Microwave theory and techniques; Monolithic integrated circuits; Phase transformers; Prototypes; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2003.814311

Filename

1209272