| 摘要 |
A chopper radiometer that includes a receiving antenna to which through T-like junction a key-modulator is connected, and low-ohmic matched edge absorbing load, the output of the key-modulator through a T-like junction is connected to high-ohmic controlled edge absorption load, and input of heterodyne receiver, synchronous detector output of which is connected to the low frequency filter, registration device, low frequency generator connected to control inputs of the key-modulator and synchronous detector. It includes generator of reference signal output of which is connected to the key-modulator, output of heterodyne receiver is connected to de-correlation filter output of which is connected in series to synchronous detector, besides that the output of de-correlation filter is in series connected to the second synchronous detector and the second low frequency filter, the output of the low frequency filter and the output of the second low frequency filter are connected to the direct and inverted inputs of the multiplier, the output of the multiplier is connected in series to amplifier and registration device, one of the outputs of the low frequency generator is connected to control input of the second synchronous detector. |
