A silicon monolithic spiral transmission line balun with symmetrical design

Author

Yoon, Yeong J. ; Lu, Yicheng ; Frye, Robert C. ; Smith, Peter R.

Author_Institution

Dept. of Electr. & Comput. Eng., Rutgers Univ., Piscataway, NJ, USA

Volume

20

Issue

4

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

182

Lastpage

184

Abstract

In this work, a spiral transmission line balun has been fabricated on a high resistivity silicon substrate. The Marchand-type balun has been designed to have the same physical common ground points for the output transmission lines, which eliminates imbalance due to potential difference at the ground. Return loss is better than 17 dB in the frequency band of 1.6-4.1 GHz, especially 39 dB around 1.9 GHz. The amplitude imbalance is less than 0.3 dB throughout the bandwidth. The phase departure from 180/spl deg/ is less than 20 over the frequency range of 1.6-2.6 GHz. The balun is suitable for MMIC application.

Keywords

MMIC mixers; baluns; elemental semiconductors; silicon; 1.6 to 4.1 GHz; MMIC application; Marchand-type balun; Si; amplitude imbalance; output transmission lines; phase departure; physical common ground points; potential difference; return loss; spiral transmission line balun; symmetrical design; Conductivity; Frequency; Impedance matching; Inductors; MMICs; Mutual coupling; Silicon; Spirals; Transformers; Transmission lines;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/55.753760

Filename

753760