Realization of high-order S-plane bandpass Marchand balun with no lumped elements

Author

Yun-Wei Lin ; Chi-Yang Chang

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

fYear

2012

fDate

4-7 Dec. 2012

Firstpage

1196

Lastpage

1198

Abstract

A high-order wideband planar balun is proposed in this paper. The balun is exactly synthesized using Richards´ Theorem. Applying the S-plane bandpass other than high-pass prototype can shrink the circuit size and improve the stopband performance. Using the step impedance transformation, the proposed balun can be easily implemented in planar structure without lumped elements to fit the user-defined specification. A high-order balun with bandwidth about 100% and reflection level of -20dB is designed as an example. The simulation and measurement results are matched well.

Keywords

baluns; equivalent circuits; transmission lines; Richard theorem; equivalent circuit; high-order S-plane bandpass Marchand balun; high-order wideband planar balun; high-pass prototype; planar structure; step impedance transformation; step impedance transmission lines; Equivalent circuits; Impedance; Impedance matching; Microstrip; Prototypes; Slotline; Wideband; Balun; S-plane bandpass prototype; planar structure; synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2012 Asia-Pacific

Conference_Location

Kaohsiung

Print_ISBN

978-1-4577-1330-9

Electronic_ISBN

978-1-4577-1331-6

Type

conf

DOI

10.1109/APMC.2012.6421867

Filename

6421867