Matched loading for calibration of passive matrix millimeter wave imaging system

Passive microwave imaging system are widely designed for the remote sensing, radio-astronomical observation and especially for the detection of weapons and contraband concealed on persons under clothing in the special control devices for public security. This system must have various special calibration at the used temperatures. There described in technical details simple square matched loading for the calibration matrix radiometric 8 mm receiving array which has VSWR not pure than 1,10.