Design of a Broadband 3 GHz to 20 GHz High Performance Integrated Mixer with 0 dBm LO Drive
Xudong Wang, Bill Beckwith, Thomas Schiltz, Weston Sapia, Michael Bagwell
A broadband 3 GHz to 20 GHz SiGe passive mixer requiring only 0 dBm LO drive is presented. A new balun structure is the key innovation that enables the wide RF bandwidth. The same balun topology is used on the IF, enabling a wide, 300 MHz to 9 GHz IF. This high-performance double-balanced mixer can be used for up-conversion or down-conversion. The mixer is packaged in a tiny 2 mm × 3 mm, 12-lead QFN package and delivers 23 dBm IIP3 and 14 dBm P1dB. The mixer consumes 132 mA on a 3.3 V supply.
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