A Wideband Dielectric Waveguide-Based 160-GHz Radar Target Generator

Sensors

卷:19

Winfried Mayer¹  Christian Wegner²  Martin Geiger²  Christian Waldschmidt² 

[1] Endress + Hauser GmbH + Co. KG, 79689 Maulburg, Germany;

[2] Institute of Microwave Engineering, Ulm University, 89081 Ulm, Germany;

关键词: target generator;    dielectric waveguide;    millimeter wave radar;    dispersion;    frequency-modulated continuous wave (FMCW) radar;   

DOI  :  10.3390/s19122801

来源: DOAJ

【 摘 要 】

The increasing number of radar sensors in commercial and industrial products leads to a growing demand for system functionality tests. Conventional test procedures require expensive anechoic chambers to provide a defined test environment for radar sensors. In this paper, a compact and low cost dielectric waveguide radar target generator for level probing radars is presented. The radar target generator principle is based on a long dielectric waveguide as a one-target scenery. By manipulating the field distribution of the waveguide, a specific reflection of a radar target is generated. Two realistic scenarios for a tank level probing radar are investigated and suitable targets are designed with full wave simulations. Target distances from 13 cm to at least 9 m are realized with an extruded dielectric waveguide with dielectric losses of 2 dB/m at 160 GHz. Low loss (0.5 dB) and low reflection holders are used to fix the waveguide. Due to the dispersion of the dielectric waveguide, a detailed analysis of its impact on frequency-modulated continuous wave (FMCW) radars is given and compared to free-space propagation. The functionality of the radar target generator is verified with a 160-GHz FMCW radar prototype.

【 授权许可】

Unknown