Packet suppression of a leakage of microwave power from industrial heating systems via the higher modes of open waveguide ports




microwave heating, waveguide filter, bandstop filter, safety


A waveguide bandstop filter intended for an open port of an industrial heating system is numerically modeled. The filter was designed to suppress a leakage of microwave power from a magnetron operating the frequency of 2.45 GHz. A modification the filter providing an improved suppression of a power leaking via higher waveguide modes is proposed. A reduced leakage level is obtained without enlargement of the microwave filter.


J. Thuery, Mictowaves: Industrial, Scientific and Medical Applications. Norwood, MA: Artech House, 1992. ISBN 0890064482.

A. C. Metaxas and R. J. Meredith, Industrial Microwave Heating. Stevenage, U.K.: Peregrinus, 1998, Dewey Number 621.402/5.

IEEE Standard for safety levels with respect to human explosure to radio frequency electromagnetic fields, 3kHz to 300GHz, 1992. DOI:

A. L.VanKoughnett, J. G. Dunn, “Doubly сorrugated сhokes for microwave heating systems,” J. Microwave Power, vol. 8, no. 1, pp. 101-110, 1973. DOI:

C. A. W. Vale, P. Meyer and K. D. Palmer, “A design procedure for bandstop filters in waveguides supporting multiple propagating modes,” IEEE Trans. Microwave Theory Tech., vol. 48, no. 12, pp. 2496-2503, Dec. 2000. DOI:

P. Meyer, C. A Vale, W. Steyn, “On the design of waveguide devices using multiple propagating modes,” Proc. of Int. Conf. on Telecommunications in Modern Satellite, Cable and Broadсasting Service, TELSIKS, 1-3 Oct. 2003, Nis, Yugoslavia. IEEE, 2003. DOI:

P. Soto, V. E. Boria, J. M.Catalá-Civera, N. Chouaib, M. Guglielmi, B. Gimeno, “Analysis, design, and experimental verification of microwave filters for safety issues in open-ended waveguide systems,” IEEE Trans. Microwave Theory Tech., Nov. 2000. IEEE, 2000, vol. 48, pp. 2133-2140. DOI:

F. J. Clemente-Fernández, J. Monzó-Cabrera, J. M. Catalá-Civera, J. L. Pedreño-Molina, A. J. Lozano-Guerrero, and A. Díaz-Morcillo, “Waveguide bandstop filter based on irises and double corrugations for use in industrial microwave ovens,” Electron. Lett., vol. 45, pp. 772-774, June 2012. DOI:

F. J. Clemente-Fernández, J. Monzó-Cabrera, J. L. Pedreño-Molina, F. J. Lozano-Guerrero, J. Fayos-Fernández, A. Díaz-Morcillo, “A new sensor-based self-configurable bandstop filter for reducing the energy leakage in industrial microwave ovens,” Meas. Sci. Technol., vol. 23, no. 6, 065101, 2012. DOI:

S. A. Prikolotin, S. A. Steshenko, D. Yu. Kulik, L. A. Rud, A. A. Kirilenko, “Fast full 3D EM CAD of waveguide units based on the generalized mode-matching technique,” Proc. of Int. Conf. on MMET, 28-20 Aug. 2012, Kyiv, Ukraine. IEEE, 2012, pp. 109-112. DOI:

A. A. Kirilenko, L. P. Mospan, V. I. Tkachenko, “Extracted-pole bandpass filters based on the slotted irises,” Proc. of European Microwave Conf., 23-26 Sept. 2002, Milan, Italy. IEEE, 2002. DOI:

L. P. Mospan, A. A. Kirilenko, “Spatial filter with quasi-elliptical response,” Proc. of European Microwave Conf., 4-6 Oct. 2005, Paris, France. IEEE, 2005. DOI:

A. A. Kirilenko, L. P. Mospan, “Harmonic rejection filters for the dominant and higher waveguide modes based on the slotted strips,” IEEE IMS Digest, 2002. DOI:

P. V. Castejón, D. C. Serrano, F. D.Q. Pereira, J. Hinojosa, A. Á. Melcón, “A novel low-pass filter based on rounded posts designed by an alternative full-wave analysis technique,” IEEE Trans. Microwave Theory Tech., vol. 62, no. 10, pp. 2300-2306, Oct. 2014. DOI: