We present an investigation of hot-electron bolometric mixer based on YBa2C
u3O7-delta (YBCO) superconducting thin film. Mixer conversion loss, absorbe
d local oscillator power and intermediate frequency bandwidth was measured
at the local oscillator frequency 600 GHz. The fabrication technique for na
noscale YBCO hot-electron bolometer (HEB) mixer integrated into planar ante
nna structure is described.