Title :
A 7-8 GHz Serrodyne Modulator in SiGe for MIMO Signal Generation
Author :
Withagen, Johan C. J. G. ; Annema, A.J. ; Nauta, Bram ; van Vliet, Frank E.
Author_Institution :
Univ. of Twente, Enschede, Netherlands
Abstract :
An 8-bit 360o 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.
Keywords :
BiCMOS analogue integrated circuits; Ge-Si alloys; MIMO communication; microwave phase shifters; phase modulation; MIMO applications; MIMO signal generation; SiGe; SiGe BICMOS technology; frequency 6 Hz to 10 MHz; frequency 7 GHz to 8 GHz; frequency offsets; orthogonal signals; phase modulator; sawtooth modulated phase shifter; serrodyne modulator; size 250 nm; undesired frequency component; word length 8 bit; Frequency modulation; Harmonic analysis; MIMO; Phase modulation; Phase shifters; Radar; Transistors;
Conference_Titel :
Compound Semiconductor Integrated Circuit Symposium (CSICs), 2014 IEEE
Conference_Location :
La Jolla, CA
DOI :
10.1109/CSICS.2014.6978531
