An edge-coupled marchand balun with partial ground for excellent balance in 0.13 μm SiGe technology

Sudipta Chakraborty*, Leigh E. Milner, Xi Zhu, Oya Sevimli, Anthony E. Parker, Michael C. Heimlich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

An edge-coupled meandered three-coupled-line Marchand balun with a partial ground plane implemented in 0.13 μm SiGe Bi-CMOS technology is presented in this brief. The balance performance of the designed balun is significantly improved by creating a `no ground plane' beneath the coupledline structure, which is demonstrated by simulating two baluns: one with a partial ground and the other with a solid ground underneath. The measured amplitude and phase imbalances are less than 0.4 dB and 2.5°, across the 3-dB bandwidth from 21.5 to 95 GHz, surpassing previously reported results of edge-coupled Marchand baluns. The balun occupies 230 μm × 370 μm.
Original languageEnglish
Pages (from-to)226-230
Number of pages5
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
Volume68
Issue number1
DOIs
Publication statusPublished - Jan 2021

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