A Compact, Highly Linear Ku-Band SiGe HBT Power Amplifier Using Shared Single Center-Tap Four-Way Output Transformer Balun for Emerging Low Earth Orbit SATCOM Phased-Array Transmitter

This paper presents a compact, highly linear Ku-band SiGe HBT PA for Low Earth orbit (LEO) satellite communication (SATCOM). A four-way output transformer (TF) balun with a shared single center-tap (SSCT) is proposed not only for simplifying signal routing for compact chip size, but also obtaining h...

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Bibliographic Details
Published in2024 IEEE Radio Frequency Integrated Circuits Symposium (RFIC) pp. 295 - 298
Main Authors Yoon, Byeongcheol, Han, In Su, Kim, Junghyun, Ju, Inchan
Format Conference Proceeding
LanguageEnglish
Published IEEE 16.06.2024
Subjects
Area measurement
Baluns
Extraterrestrial measurements
Ku-band
low earth orbit (LEO)
Low earth orbit satellites
power amplifier (PA)
Power amplifiers
Routing
satellite communications (SATCOM)
Semiconductor device measurement
transformer (TF)
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Summary:This paper presents a compact, highly linear Ku-band SiGe HBT PA for Low Earth orbit (LEO) satellite communication (SATCOM). A four-way output transformer (TF) balun with a shared single center-tap (SSCT) is proposed not only for simplifying signal routing for compact chip size, but also obtaining high power combining efficiency. A prototype Ku-band SiGe PA, which merely occupies a core area of 0.21 mm 2 , attains measured peak output power (POUT) and power added efficiency (PAE) of 24.4 dBm and 32.1% at 11.7 GHz, respectively, with the highest power density of 1311.5 mW/mm 2 . The PA also delivers average POUT (Pavg) of 18.6/16.6 dBm with average PAE (PAEavg) of 16.0/12.6% at 250 MHz symbol rate DVB-S2X 64/256 APSK modulation.
ISSN:2375-0995
DOI:10.1109/RFIC61187.2024.10600029