Patent ID: 9547072
Date: 2017-01-17
CPC Classifications: G01S,Y02A

Claim:
1. A weather radar for measuring radar signals in the GHz range, the weather radar comprising: a receiver containing at least one signal path, the receiver comprising a receiving facility configured to receive an incoming radar signal, on which a test signal generated by a test signal generator is superimposed in a coupler; a processing device configured to amplify, filter and convert both signals to lower frequencies; a matched filter configured to filter the incoming radar signal; an evaluation device configured to derive calibration parameters of the signal path from the test signal for the frequency of the test signal in order to determine the signal strength of the received radar signal; wherein the test signal is mixed with at least one frequency differing from the frequency of the radar signal, so that the radar signal and the test signal are processed separately from one another by the evaluation device, and the calibration parameters of the signal path for the frequency of the radar signal are determined from the test signal through a modeling of the frequency dependence of the calibration parameters for frequencies around those of the radar signal; and wherein the receiver includes a splitting device configured to separate the test signal and the radar signal from one another and feed the test signal and the radar signal to the evaluation device.