Six-Port Error Propagation

In this contribution the various influences on the accuracy of a near range precision radar are described. The front-end is a monostatic design operating at 34-36.2 GHz. The hardware configuration enables different modes of operation including FM-CW and interferometric modes. To achieve a highly accurate distance measurement, attention must be paid to various error sources. Due to the use of a six-port it is rather complicated to determine the corresponding error propagation. In the following the results of investigations on how to achieve an exceptional accuracy of ?0.1 mm are described.