0.8-5.2GHz band SiGe-MMIC Q-MOD for multi-band multi-mode direct conversion transmitters

  title={0.8-5.2GHz band SiGe-MMIC Q-MOD for multi-band multi-mode direct conversion transmitters},
  author={Noriharu Suematsu and Chika Kageyama and K. Nakajima and Koji Tsutsumi and Eiji Taniguchi and Kaoru Murakami},
  journal={2005 Asia-Pacific Microwave Conference Proceedings},
  pages={4 pp.-}
In order to realize multiband multimode transmitters for the 4th generation mobile communication systems based on software define radio (SDR) technology, 0.8-5.2GHz broad-band direct conversion quadrature modulator (Q-MOD) has been fabricated in 0.35/spl mu/m SiGe BiCMOS process. The circuit combination of a static frequency divider and a poly phase filter (PPF) enables higher 90degree phase accuracy than that of the static frequency divider alone. By employing this 90 degree power divider, the… CONTINUE READING


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