Quasioptical Hot Electron Bolom-Eter Mixers Based on Thin NBN Films for Terahertz Region

Presented in this paper are the performances of HEB mixers based on 2-3.5 nm thick NbN films integrated with log-periodic spiral antenna. Double side-band receiver noise temperature values are 1300 K and 3100 K at 2.5 THz and at 3.8 THz, respectively. Mixer gain bandwidth is 5.2 GHz. Local oscillator power is 1-3 ?W for mixers with different active area.