35-GHz 6-port receiver for radar applications

Christian G. Diskus; Andreas Stelzer; Christian Gamsjaeger; Kurt Luebke; Erich Kolmhofer; Hartwig W. Thim

doi:10.1117/12.365717

15 October 1999 35-GHz 6-port receiver for radar applications

Christian G. Diskus, Andreas Stelzer, Christian Gamsjaeger, Kurt Luebke, Erich Kolmhofer, Hartwig W. Thim

Proceedings Volume 3752, Subsurface Sensors and Applications; (1999) https://doi.org/10.1117/12.365717
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The application of six-port technology in the receiving part of a radar front-end is described in this contribution. This receiver allows measuring magnitude and phase of the radar signal without the need of down-conversion. According to the applications and the availability of the devices needed for assembling the prototype sensor the frequency of operation was set to 35 GHz. The structure of the six-port as well as the calibration and measurement algorithms are described in detail. The accuracy of the phase measurement is 2 - 10 degrees depending on the power level of the signal. Another key element of the proposed radar sensor is a direct frequency counter. With this circuit it is possible to measure the frequency of operation within 120 microseconds. The accuracy of the distance reading of the radar is directly related to the accuracy of the frequency measurement and has reached 0.1 mm.

Citation Download Citation

Christian G. Diskus, Andreas Stelzer, Christian Gamsjaeger, Kurt Luebke, Erich Kolmhofer, and Hartwig W. Thim "35-GHz 6-port receiver for radar applications", Proc. SPIE 3752, Subsurface Sensors and Applications, (15 October 1999); https://doi.org/10.1117/12.365717

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