Dual-band balun with flexible frequency ratios

Author

Li Shen, Andres ; Mi Zhou ; Arigong, Bayaner ; Jin Shao ; Han Ren ; Jun Ding ; Rongguo Zhou ; Hualiang Zhang

Author_Institution

Dept. of Electr. Eng., Univ. of North Texas, Denton, TX, USA

Volume

50

Issue

17

fYear

2014

fDate

Aug. 14 2014

Firstpage

1213

Lastpage

1214

Abstract

A novel dual-band balun is presented. The designed 3-port balun is based on a 4-port structure with the fourth port terminated as an open end. Being a 4-port symmetrical network, even-odd-mode analysis is used to analyse the balun´s performance. Based on the derived explicit design equations, a balun is designed to operate at 1.1 and 2 GHz. Numerical simulations show a low reflection coefficient S₁₁, equal magnitude of -3 dB as well as 180° phase difference at the output ports. To validate the theoretical and numerical simulations, the proposed balun is fabricated on the FR4 Isola printed circuit board and measurement results match well with the design theory.

Keywords

UHF devices; baluns; numerical analysis; 3-port balun; 4-port structure; 4-port symmetrical network; FR4 Isola printed circuit board; PCB; design theory; dual-band balun; even-odd-mode analysis; explicit design equations; flexible frequency ratios; frequency 1.1 GHz; frequency 2 GHz; low reflection coefficient S₁₁; numerical simulations; output ports;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.1110

Filename

6880217