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We present a two-way current combining power amplifier (PA) for 28GHz wireless communication. To boost the saturated output power (PSAT) and maintain a high power-added efficiency (PAE), a differential 3-stacked transistors structure is used for the unit PA cell. The stability factor and the PAE are improved with capacitive neutralization and shunt inductor intermediate node matching. Reliability issues under a 2.4V supply voltage are relieved with properly designed biasing and gate capacitances. The PA is implemented in a 22nm FD-SOI technology with a chip core area of 0.21 mm2, Measurement results show that the PA achieves a power gain of 27dB and a PSAT of 21.7dBm with a maximum PAE of 27.1% at 28GHz. The output 1dB compression point (P1aB) is 19.1 dBm. Measured PAE at P1dB and 6dB power back-off are 23% and 10.3%, respectively.
|Title of host publication||2020 IEEE Custom Integrated Circuits Conference (CICC)|
|Number of pages||4|
|Publication status||Published - Mar 2020|
|Event||2020 IEEE Custom Integrated Circuits Conference (CICC) - , United States|
Duration: 22 Mar 2019 → 25 Mar 2020
|Conference||2020 IEEE Custom Integrated Circuits Conference (CICC)|
|Period||22/03/19 → 25/03/20|
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