A Variable Gain Multiband Shunt Feedback LNA for LTE. - Stefan Kaehlert; Dirk Bormann; Ralf Wunderlich; Stefan Heinen (ICECS, 2010)

An integrated voltage-mode PWM controlled buck converter with active compensation. - Lei Liao; Tobias D. Werth; Stefan Kaehlert; Ralf Wunderlich; Stefan Heinen (ICECS, 2010)

Design of frequency agile filters in RF frontend circuits. - Stefan Kaehlert; Dirk Bormann; Tobias D. Werth; Muh-Dey Wei; Lei Liao; Stefan Heinen (RWS, 2012)

3.5 GHz triple cascaded current-reuse low noise amplifier. - Muh-Dey Wei; Dirk Bormann; Stefan Kaehlert; Tobias D. Werth; Lei Liao; Sheng-Fuh Chang; Renato Negra (NORCHIP, 2013)