Title :
A wideband monolithic five-bit serrodyne modulator
Author :
Mitchell, S. ; Wachsman, J. ; Lizama, G. ; Ali, F. ; Adar, A.
Author_Institution :
Pacific Monolithics, Sunnyvale, CA, USA
Abstract :
An analysis and results of a serrodyne modulator, composed of a monolithic five-bit phase shifter and digital control circuits, are presented. Spur suppression of a serrodyne modulator is strongly dependent upon minimizing phase error and maintaining constant amplitude across all phase states. The advantages of monolithic GaAs ICs for this application are clear because of their inherent reproducibility. A monolithic five-bit serrodyne modulator demonstrates better than 22 dB of carrier and image suppression over a 7-12-GHz band when measured in the temperature range -50 degrees C to +95 degrees C.<>
Keywords :
III-V semiconductors; MMIC; gallium arsenide; modulators; -50 to 95 degC; 7 to 12 GHz; GaAs; MMIC; SHF; digital control circuits; monolithic GaAs ICs; monolithic five-bit phase shifter; monolithic microwave IC; serrodyne modulator; wideband; Amplitude modulation; Circuits; Digital control; Digital modulation; Gallium arsenide; Phase modulation; Phase shifters; Reproducibility of results; Temperature measurement; Wideband;
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1989. Technical Digest 1989., 11th Annual
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/GAAS.1989.69335
