Sensitive permittivity detector for dielectric samples at 120 GHz

J. Wessel, K. Schmalz, C. Scheytt, D. Kissinger, in: 2018 IEEE Radio and Wireless Symposium (RWS), IEEE, USA/Anaheim, 2018.

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Abstract
This work describes a dielectric sensing system applying a 120 GHz electrical interferometer for contactless permittivity measurements. The applied IC was fabricated in a 130 nm SiGe process featuring an ft and fmax of 240 GHz and 330 GHz. The on-chip system contains a 120 GHz VCO with a tuning range of 7 GHz featuring a divide-by-64 circuit to enable external PLL operation. An important feature of the IC is high-precision and high-resolution phase shifting based on a slow-wave transmission lines approach with digital control. This allows for direct digital readout ability. The on chip power detector provides DC output signals giving the opportunity to record transfer functions of the interferometer. It enables sample emulation capability by phase shift inducement in the measurement as well as a reference transmission line. The motherboard of the system provides PLL stabilization for frequency sweeps. The proposed approach is capable of automated dielectric monitoring by phase compensation.
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2018 IEEE Radio and Wireless Symposium (RWS)
Conference Date
2018.01.15 – 2018.01.18
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Wessel J, Schmalz K, Scheytt C, Kissinger D. Sensitive permittivity detector for dielectric samples at 120 GHz. In: 2018 IEEE Radio and Wireless Symposium (RWS). IEEE; 2018. doi:10.1109/RWS.2018.8304967
Wessel, J., Schmalz, K., Scheytt, C., & Kissinger, D. (2018). Sensitive permittivity detector for dielectric samples at 120 GHz. 2018 IEEE Radio and Wireless Symposium (RWS). https://doi.org/10.1109/RWS.2018.8304967
@inproceedings{Wessel_Schmalz_Scheytt_Kissinger_2018, place={USA/Anaheim}, title={Sensitive permittivity detector for dielectric samples at 120 GHz}, DOI={10.1109/RWS.2018.8304967}, booktitle={2018 IEEE Radio and Wireless Symposium (RWS)}, publisher={IEEE}, author={Wessel, Jan and Schmalz, Klaus and Scheytt, Christoph and Kissinger, Dietmar}, year={2018} }
Wessel, Jan, Klaus Schmalz, Christoph Scheytt, and Dietmar Kissinger. “Sensitive Permittivity Detector for Dielectric Samples at 120 GHz.” In 2018 IEEE Radio and Wireless Symposium (RWS). USA/Anaheim: IEEE, 2018. https://doi.org/10.1109/RWS.2018.8304967.
J. Wessel, K. Schmalz, C. Scheytt, and D. Kissinger, “Sensitive permittivity detector for dielectric samples at 120 GHz,” 2018, doi: 10.1109/RWS.2018.8304967.
Wessel, Jan, et al. “Sensitive Permittivity Detector for Dielectric Samples at 120 GHz.” 2018 IEEE Radio and Wireless Symposium (RWS), IEEE, 2018, doi:10.1109/RWS.2018.8304967.
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