Substrate integrated waveguide fed antenna for 61 GHz ultra-short-range interferometric radar systems

Radar sensors play a key role in today's industrial automation. Being an alternative to frequency modulated continuous wave radar, Six-Port based radar sensors recently attracted the interest of the community as well as of the industry. This paper presents a 61 GHz Six-Port radar sensor for ultra-short range applications and a dedicated substrate integrate waveguide fed tapered slot antenna design. Due to an optimized design, the antenna allows for measurements in the direct near-zone of 0mm to 10mm without ambiguity effects. Making use of a spiral fitting operation, the presented measurement results show an absolute distance error of less than 100 μm.

[1]  N. Pohl,et al.  SiGe-MMIC based D-Band radar for accurate FMCW multi-target vibration measurements , 2014, 2014 IEEE MTT-S International Microwave Symposium (IMS2014).

[2]  R. Weigel,et al.  Diode detector design for 61 GHz substrate integrated waveguide Six-Port radar systems , 2015, 2015 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet).

[3]  Robert Weigel,et al.  Ultra-short-range, precise displacement measurement setup with a near field slot-line antenna and a dedicated spiral calibration , 2015, 2015 IEEE MTT-S International Microwave Symposium.

[4]  K. Haddadi,et al.  A 60 GHz Six-Port Distance Measurement System With Sub-Millimeter Accuracy , 2009, IEEE Microwave and Wireless Components Letters.

[5]  A. Stelzer,et al.  A microwave position sensor with sub-millimeter accuracy , 1999, 1999 IEEE MTT-S International Microwave Symposium Digest (Cat. No.99CH36282).

[6]  N. Pohl.  A dielectric lens antenna with enhanced aperture efficiency for industrial radar applications , 2010, IEEE Middle East Conference on Antennas and Propagation (MECAP 2010).

[7]  Serioja Ovidiu Tatu,et al.  Multiport Technology: The New Rise of an Old Concept , 2014, IEEE Microwave Magazine.

[8]  G. Engen,et al.  The Six-Port Reflectometer: An Alternative Network Analyzer , 1977, 1977 IEEE MTT-S International Microwave Symposium Digest.

[9]  Wei Hong,et al.  A Planar Magic-T Using Substrate Integrated Circuits Concept , 2008, IEEE Microwave and Wireless Components Letters.