This dataset contains the experimental data presented in the paper titled "High-performance GaAs/AlAs superlattice electronic devices in oscillators at frequencies 100-320 GHz." FIG2.CSV contains experimentally recorded current-voltage characteristics of a superlattice electronic device. The data correspond to Fig. 2. FIG3.CSV contains experimentally recorded output powers from superlattice electronic devices at oscillation frequencies 120-180 GHz in the fundamental mode. The data correspond to Fig. 3. FIG4.CSV contains experimentally recorded output powers and oscillation frequencies vs. back short position for a superlattice electronic device oscillating in the fundamental mode. The data correspond to Fig. 4. FIG5.CSV contains experimentally recorded output powers from superlattice electronic devices at oscillation frequencies 240-320 GHz in a second-harmonic mode. The data correspond to Fig.5.