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A 28-GHz SiGe up-conversion mixer using a series-connected triplet for higher dynamic range and improved IF port return loss

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2 Author(s)
Comeau, J.P. ; Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Cressler, J.D.

This work presents a fully integrated SiGe microwave up-conversion mixer, utilizing a new circuit topology consisting of a common-base, series-connected triplet at the IF port to achieve a significant improvement in dynamic range. This circuit functions with an IF signal of 1.25 GHz, and has an input 1-dB compression point (IP1dB) of -6.8 dBm, for an RF output at 28 GHz. The circuit operates over a frequency range from 19 to 31 GHz, with a maximum conversion gain of 1 dB. The mixer can operate over an IF range from 1 to 10 GHz, while maintaining an IF port return loss greater than 10 dB.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:41 ,  Issue: 3 )