New classes of miniaturized planar Marchand baluns

Author

Fathelbab, Wael M. ; Steer, Michael B.

Author_Institution

Dept. of Electr. & Comput. Eng., North Carolina State Univ., Raleigh, NC, USA

Volume

53

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

1211

Lastpage

1220

Abstract

Three new classes of miniaturized Marchand balun are defined based on the synthesis of filter prototypes. They are suitable for mixed lumped-distributed planar realizations with small size resulting from transmission-line resonators being a quarter-wavelength long at frequencies higher than the passband center frequency. Each class corresponds to an S-plane bandpass prototype derived from the specification of transmission zero locations. A tunable 50:100-Ω balun is realized at 1 GHz to demonstrate the advantages of the approach presented here.

Keywords

baluns; band-pass filters; high-pass filters; network synthesis; poles and zeros; resonator filters; 1 GHz; bandpass filters; filter prototypes; high-pass filter; miniaturized planar Marchand baluns; network synthesis; transmission line resonators; transmission zero; Band pass filters; Circuit synthesis; Coupling circuits; Filtering theory; Frequency; Impedance matching; Network synthesis; Passband; Prototypes; Transmission lines; High-pass/bandpass prototypes; Marchand balun; network synthesis; transmission zeros;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2005.845707

Filename

1420750