A Compact Wideband Marchand Balun Based on Novel Three-Coupled-Line Transformer Structure
Abstract
!A compact wideband Marchand balun based on a novel three-coupled-line transformer structure is proposed, implemented and fabricated on silicon integrated passive device (IPD) technology. The proposed balun adopts IPD process to realize multi-line coupling and transformer structure at the same time, realizes ultra-compact size on the basis of enhanced coupling, and achieves excellent broadband performance. Meanwhile, the equivalent circuit models and design equations are presented. The simulated and measured results of the balun are in reasonably good agreement. The amplitude and phase imbalances measured at the fabricated balun prototype are less than ±1.2dB and ±5°, respectively, with bandwidth from 1.8 to 7 GHz. The insertion loss of the proposed balun isL× 0.0072 λL).
Fields of Study & Subjects
Microwave Engineering and Waveguides
Radio Frequency Integrated Circuit Design
Analog and Mixed-Signal Circuit Design
Publication details
- Journal / source
- IEEE Transactions on Components Packaging and Manufacturing Technology
- Volume
- 16
- Issue
- 3
- Pages
- 541–546
- Publication date
- 9 February 2026
- Language
- EN