A 7-8 GHz Serrodyne Modulator in SiGe for MIMO Signal Generation

An 8-bit 360 o sawtooth modulated phase shifter is used to apply very small frequency offsets to RF signals between 7 and 8 GHz. Offsets between 6 Hz and 10MHz can be obtained. Such frequency offsets can be used to generate orthogonal signals, which are required in e.g. MIMO applications. Each undes...

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Bibliographic Details
Published in2014 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) pp. 1 - 4
Main Authors Withagen, Johan C. J. G., Annema, A. J., Nauta, B., van Vliet, F. E.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2014
Subjects
Frequency modulation
Harmonic analysis
MIMO
Phase modulation
Phase shifters
Radar
Transistors
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Summary:An 8-bit 360 o sawtooth modulated phase shifter is used to apply very small frequency offsets to RF signals between 7 and 8 GHz. Offsets between 6 Hz and 10MHz can be obtained. Such frequency offsets can be used to generate orthogonal signals, which are required in e.g. MIMO applications. Each undesired frequency component is suppressed to below -30 dBc. The phase modulator is realized in a 250 nm SiGe BICMOS technology.
ISSN:1550-8781
2374-8443
DOI:10.1109/CSICS.2014.6978531