Multiharmonic generators for relative phase calibration of nonlinear network analyzers. - Peter Heymann; Ralf Doerner 002; Matthias Rudolph (IEEE Trans. Instrum. Meas., 2001)

Highly linear X-band GaN-based low-noise amplifier. - Cristina Andrei; Ralf Doerner 002; Olof Bengtsson; Serguei A. Chevtchenko; Wolfgang Heinrich; Matthias Rudolph (ISSSE, 2012)