A 0.05-26 GHz Direct Conversion I/Q Modulator MMIC

An integrated I/Q modulator is presented, implementing a static frequency divider for local oscillator (LO) quadrature phase splitting, Gilbert cell switching mixers for direct upconversion, and fabricated in a high speed Indium-Phosphide HBT process. LO quadrature is fine-tuned by a control voltage...

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Bibliographic Details
Published in2014 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS) pp. 1 - 4
Main Authors Iverson, Eric W., Feng, Milton
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2014
Subjects
Amplitude modulation
Baseband
Frequency modulation
Mixers
Voltage control
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Summary:An integrated I/Q modulator is presented, implementing a static frequency divider for local oscillator (LO) quadrature phase splitting, Gilbert cell switching mixers for direct upconversion, and fabricated in a high speed Indium-Phosphide HBT process. LO quadrature is fine-tuned by a control voltage with 0.18 degrees/mV for 2.14 GHz operation. Single-sideband conversion gain ranges from -14 to -23 dB across the LO frequency range of 50 MHz to 26 GHz. Single-carrier W-CDMA ACPR ranges from -64 dBc to -53 dBc for approximately -20 dBm output power. Output intercept point (OIP3) ranges from +14 dBm at 50 MHz to +4.6 dBm at 26 GHz.
ISSN:1550-8781
2374-8443
DOI:10.1109/CSICS.2014.6978527