An Ultra-compact Fully Integrated Circulator in 28 nm CMOS IC Technology

We demonstrated a non-magnetic non-reciprocal circulator in CMOS integrated circuit (IC) technology using a four-path band-pass filter (BPF)-based staggered commutation network, which can break Lorentz reciprocity and replace a ferrite-based circulator used for decades in the history of wireless com...

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Bibliographic Details
Published inJournal of semiconductor technology and science Vol. 25; no. 2; pp. 184 - 190
Main Authors Do, Quang-Huy, Ngo, Tan-Binh, Yoon, Sang-Woong
Format Journal Article
LanguageEnglish
Published 대한전자공학회 01.04.2025
Subjects
전기공학
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Summary:We demonstrated a non-magnetic non-reciprocal circulator in CMOS integrated circuit (IC) technology using a four-path band-pass filter (BPF)-based staggered commutation network, which can break Lorentz reciprocity and replace a ferrite-based circulator used for decades in the history of wireless communication. The circulator IC was implemented in Samsung 28 nm RF CMOS process. The small-signal measurements among three ports showed the minimum insertion loss of 4.5-5.5 dB, and the maximum isolation of 35.7-44.8 dB in the frequency of 2.39-2.4 GHz. The measured maximum IP1dB and minimum noise-figure were 18.5 dBm and 5.8 dB, respectively. The circulator IC consumes 21.6 mW, and the size of the chip without pads is 0.93 mm2 . KCI Citation Count: 0
ISSN:2233-4866
1598-1657
1598-1657
2233-4866
DOI:10.5573/JSTS.2025.25.2.184