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Dielectric waveguides for industrial radar applications

Published online by Cambridge University Press:  24 February 2015

C. Baer*
Affiliation:
Institute of Electronic Circuits, Ruhr-University Bochum, 44801 Bochum, Germany
C. Schulz
Affiliation:
Institute of Microwave Systems, Ruhr-University Bochum, 44801 Bochum, Germany
I. Rolfes
Affiliation:
Institute of Microwave Systems, Ruhr-University Bochum, 44801 Bochum, Germany
T. Musch
Affiliation:
Institute of Electronic Circuits, Ruhr-University Bochum, 44801 Bochum, Germany
*
Corresponding author: C. Baer Email: [email protected]

Abstract

In this paper, we present several dielectric waveguide (DWG) setups that enable the transition between radar front ends and antennas in challenging, industrial environments. Apart from good propagation behavior, DWG provide a nearly dispersion free transmission over large distances. Furthermore, they can be used as an electrical insulator in places with critical creep distances, in high temperature environments, and for applications with limited installation space. Fundamentals concerning the ideal propagation mode and adequate waveguide–fiber transitions are presented. Results of electromagnetic simulations as well as measurements on manufactured DWG are discussed in detail. The presented excellent propagation behavior proves the effectiveness of the proposed setup.

Type
Research Papers
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2015 

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References

REFERENCES

[1] Jaeschke, T.; Vogt, M.; Baer, C.; Bredendiek, C. and Pohl, N.: Improvements in distance measurement and SAR-imaging applications by using ultra-high resolution mm-wave FMCW radar systems, in Proc. 2012 IEEE MTT-S Microwave Symp. Digest (MTT), 17–22 June 2012, 1–3.Google Scholar
[2] Baer, C.; Schulz, C.; Rolfes, I. and Musch, T.: A robust dielectric feeding concept for harsh environmental TLPR antennas, in Proc. European Radar Conf. (EuRad), Rome, Italy, 6–10 October, 2014.Google Scholar
[3] Enayati, A.; Brebels, S.; Vandenbosch, G. and De Raedt, W.: A wideband waveguide-to-multilayer-PCB-microstrip transition for millimetre wave measurement applications, European Microwave Conf., 2009, September 29 2009–October 1 2009, 1148,1151.Google Scholar
[4] Schulz, C.; Pohl, N.; and Rolfes, I.: A broadband circular waveguide-to-microstrip transition for an 80 GHz FMCW radar system, in Proc. 2011 Asia-Pacific Microwave Conf. (APMC), 5–8 December 2011, 391–394.Google Scholar
[5] Nantista, C.; Kroll, N.M. and Nelson, E.M.: Design of a 90° overmoded waveguide bend, in Proc. Particle Accelerator Conf., 1993, vol. 2, 17–20 May 1993, 983–985.Google Scholar
[6] Li, L.; Cao, Q. and Yao, B.: Analysis of curved waveguide structures using the MPSTD algorithm, in Proc. Int. Symp. on Antennas, Propagation and EM Theory (ISAPE), 2008, 2–5 November 2008, 668–671.Google Scholar
[7] Hondros, D. and Debye, P.: Elektromagnetiske wellen an dielektrischen drahten. Ann. Phys., 32 (1910), 465476.Google Scholar
[8] Chandler, C.H.: Investigation of dielectric rod as waveguide. J. Appl. Phys., 20 (1949), 1188.Google Scholar
[9] Carson, J.R.; Mead, S.P. and Schelkunoff, S.A.: Hyperfrequency waveguides-mathematical theory. Bell Sys. Tech. J., 15 (1936), 310333.Google Scholar
[10] Adler, R.B.: Waves on inhomogeneous cylindrical structures. Proc. IRE, 40 (1952), 339.Google Scholar
[11] Gyorgy, E.M.; and Weiss, M.T.: Low loss dielectric waveguides, transactions of the I.R.E. Microw. Theory Tech., 2 (3) (1954), 38, 47.Google Scholar
[12] Technical documentation: Dielectric Properties of Rohacell, Evonic Industries, http://goo.gl/IL3CFp, May, 2011.Google Scholar
[13] Chen, X.; Liu, F.; Hou, Q. and Lu, Y. Industrial high-temperature radar and imaging technology in blast furnace burden distribution monitoring process, in 9th Conf. on Electronic Measurement and Instruments, 16–19 August 2009, 599–603.Google Scholar
[14] Zaki, K.A. and Chen, c.: Intensity and distribution of hybrid-mode fields in dielectric-loaded waveguides. IEEE Trans. Microw. Theory Tech., 33 (12) (1985), 14421447.CrossRefGoogle Scholar
[15] Technical documentation: Stainless Steel 1.4404, X2CrNiMo17-12-2, Deutsche Edelstahlwerke, http://goo.gl/UVl8ym, 1 March 2008.Google Scholar