Hostname: page-component-848d4c4894-4hhp2 Total loading time: 0 Render date: 2024-04-30T10:41:56.029Z Has data issue: false hasContentIssue false
  • English
  • Français

Correlation-based analysis of mode converters in multimode waveguides

Published online by Cambridge University Press:  26 July 2013

Ivan Russo ,
Winfried Mayer ,
Stefan Pflueger  and
Wolfgang Menzel
Ivan Russo*
Affiliation:
Institute of Microwave and Photonic Engineering – TU-Graz, Graz 8010, Austria
Winfried Mayer
Affiliation:
Endress+Hauser GmbH+Co. KG, Maulburg 79689, Germany
Stefan Pflueger
Affiliation:
EADS Deutschland GmbH, Ottobrunn 85521, Germany
Wolfgang Menzel
Affiliation:
Institute for Microwave Techniques – University of Ulm, Ulm 89081, Germany
*
Corresponding author: I. Russo Email: ivan.russo@tugraz.at
Get access Rights & Permissions [Opens in a new window]

Abstract

In this work, a novel method for the mode content extrapolation in multimode waveguides with focus on the characterization of mode converters is presented. The proposed method is based on the direct determination of the correlation coefficients between the structural functions of all possible propagating modes and the complex measured near-field pattern. To implement the method, standard near-field equipment is simply required. Test simulations and measurements from 4 to 8 GHz on a 6-in. circular pipe for radar level monitoring are reported in the last section and demonstrate that the proposed technique provides accurate information about the mode content of the structure under test.

Keywords

Microwave measurementsWave propagation and scattering: modeling and measurements
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 5 , Issue 6 , December 2013 , pp. 721 - 728
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2013 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1]Kielb, J.A.; Pulkrabek, M.O.: Application of a 25 GHz FMCW radar for industrial control and process level measurement, in IEEE MTT-S Int. Microwave Symp., vol. 1, Anaheim, CA, 1999, 281–284.Google Scholar
[2]Pohl, N.; Gerding, M.; Will, B.; Musch, T.; Hausner, J.; Schiek, B.: High precision radar distance measurements in overmoded circular waveguides. IEEE Trans. Microw. Theory Techn., 55 (6) (2007), 1374–1381.CrossRefGoogle Scholar
[3]Armbrecht, G.; Denicke, E.; Pohl, N.; Musch, T.; Rolfes, I.: Obstacle based concept for compact mode-preserving waveguide transitions for high-precision radar level measurements, in 38th European Microwave Conf., EuMC, Amsterdam, NL, 2008, 472–475.Google Scholar
[4]Forrer, M.P.; Tomiyasu, K.: Determination of higher order propagating modes in wave-guide systems. J. Appl. Phys., 29 (7) (1958), 1040–1045.Google Scholar
[5]Price, V.G.: Measurement of harmonic power generated by microwave transmitters. IRE Trans. Microw. Theory Techn., 7 (1) (1959), 116–120.Google Scholar
[6]Levinson, D.S.; Rubinstein, I.: A technique for measuring individual modes propagating in overmoded waveguides. IEEE Trans. Microw. Theory Techn., 14 (7) (1966), 310–322.Google Scholar
[7]Johnston, R.H.: Measurement of modes in an overmoded circular waveguide, in Proc. 40th Midwest Symp. on Circuits and Systems, vol. 1, Sacramento, CA, US, 1997, 599–602.Google Scholar
[8]Baird, J.M.; Roper, D.H.; Grow, R.W.: Surface array waveguide mode analyzer, in IEEE MTT-S Int. Microwave Symp., Albuquerque, NM, US, 1992, 137–140.Google Scholar
[9]Beck, A.C.: Measurement techniques for multimode waveguides. IRE Trans. Microw. Theory Techn., 3 (3) (1955), 35–41.Google Scholar
[10]Lewis, D.J.: Mode couplers and multimode measurement techniques. IRE Trans. Microw. Theory Techn., 7 (1) (1959), 110–116.Google Scholar
[11]Lorbeck, J.A.; Vernon, R.J.: Determination of mode content and relative phase in highly overmoded circular waveguides by open-ended radiation pattern measurement, in Antennas and Propagation Society Int. Symp., AP-S 1989, vol. 3, San Jose, CA, US, 1989, 1251–1254.Google Scholar
[12]Idei, H.; Shapiro, M.A.; Temkin, R.J.; Shimozuma, T.; Kubo, S.: Mode retrieval from intensity profile measurements using irradiant waveguide-modes, in 34th Int. Conf. on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009, Busan, KR, 2009.Google Scholar
[13]Kasparek, W.; Müller, G.A.: The wavenumber spectrometer – an alternative to the directional coupler for multimode analysis in oversized waveguides. Int. J. Electron., 64 (1) (1988), 5–20.Google Scholar
[14]Mahler, W.: Surveillance of the spectral purity in overmoded waveguides, in Asia-Pacific Microwave Conf., APMC 2008, New Delhi, IN, 2008.Google Scholar
[15]Mitrofanov, O.; Tan, T.; Mark, P.R.; Bowden, B.; Harrington, J.A.: Waveguide mode imaging and dispersion analysis with terahertz near-field microscopy. Appl. Phys. Lett., 94 (17) (2009), 171104.Google Scholar
[16]Klinger, Y.: The measurement of spurious modes in over-moded waveguides. Proc. IEE – B: Electron. Commun. Eng., 106 (13) (1959), 89–93.Google Scholar
[17]Nikitin, P.V.; Stancil, D.D.; Cepni, A.G.; Xhafa, A.E.; Tonguz, O.K.; Brodtkorb, D.: A novel mode content analysis technique for antennas in multimode waveguides. IEEE Trans. Microw. Theory Techn., 51 (12) (2003), 2402–2408.Google Scholar
[18]Collin, R.E.: Foundations for Microwave Engineering, 2nd ed., Wiley–IEEE Press, 2000, Hoboken, New Jersey, 194–197.Google Scholar
[19]The Mathworks, Matlab.Google Scholar
[20]Russo, I.; Menzel, W.: 4–8 GHz near-field probe for scanning of apertures and multimode waveguides. IEEE Microw. Wirel. Compon. Lett., 21 (12) (2011), 688–690.Google Scholar
[21]CST Microwave Studio, CST Computer Simulation Technology AG.Google Scholar