This paper presents the design of a novel 8-way power-combining transformer for use in mm-wave power amplifier (PA). The combiner exhibits a record low insertion loss of 1.25 dB at 83.5 GHz. A complete circuit comprised of a power splitter, two-stage cascode PA array, a power combiner and input/output matching elements was designed and realized in SiGe technology. Measured gain of at least 16.8 dB was obtained from 76.4 GHz to 85.3 GHz with a peak 19.5 dB at 83 GHz. The prototype delivered 12.5 dBm OP and 14 dBm saturated output power when operated from a 3.2 V DC supply voltage at 78 GHz.
|Number of pages||3|
|Publication status||Published - 01 Jan 2013|
|Event||Silicon Monolithic Integrated Circuits in RF Systems - Austin, TX, United States|
Duration: 21 Jan 2013 → 23 Jan 2013
|Conference||Silicon Monolithic Integrated Circuits in RF Systems|
|Period||21/01/2013 → 23/01/2013|