TELECOMMUNICATIONS AND RADIO ENGINEERING - 2009 Vol. 68,
No 13
 

 

 

 

“Pure” Conversion Regimes for High Order TEn,0-Modes, Effected by a Cascade of Three Strip Irises of Different Periods

V.V. Shcherbak
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine

Abstract
Considered in the paper is optimization of sets of periodic or quasi-periodic thin strip irises used as mode converters in rectangular waveguides. Optimum design have been found which provide for efficient (‘pure’) energy conversion of the fundamental TE1,0 mode into higher order ones, Ten,0 with great values of n (n=4 or 5 and higher), as well as for energy exchange between two different higher order modes (TE2,0 and TE3,0). Flat-topped response functions have been obtained for the mode conversion process.

References

  1. Model, A.M., (1970), Microwave filters in radiorelay systems, Svyaz, Moscow: 352 p. (in Russian).
  2. Shestopalov, V.P., Kirilenko, A.A., and Rud, L.A., (1986), Waveguide discontinuities, Naukova Dumka, Kiev: 216 p. (in Russian).
  3. Katselenbaum, B.Z., Korshunova, E.N., Pangonis, L.I., and Sivov, A.N., (1982), Synthesis of a converter for guided wave fields, Radiotekhnika and Elektronika. 27(12):2373-2380 (in Russian).
  4. Shcherbak, V.V., (2004), On the possibility of a ‘pure’ conversion of the TE1.-mode into TE2 and TE3 waves using a cascade of three strip irises, Radiofizika and Elektronika. 9(3):29-35 (in Russian).
  5. Shestopalov, V.P., (1992), Morse critical points of dispersion relations, Naukova Dumka, Kiev: 240 p. (in Russian).
  6. Shcherbak, V.V., (1968), Transverse metal gratings in the rectangular waveguide, Radiotekhnika. 7:49-51 (in Russian).
  7. Shcherbak, V.V., (1982), Solution of the wave diffraction problem at irregularities with arbitrary numbers of strips and slots over the period, DAN USSR, ser. A. 12:51-54 (in Russian).
  8. Shestopalov, V.P., and Shcherbak, V.V., (1996), Suppression of mode coupling with the use of multielement irises, Pisma v zhurnal tekhn. fiziki. 22(10):90-94 (in Russian).
  9. Kirilenko, A.A., Rud, L.A., and Tkachenko, V.I., (2006), Nonsymmetrical H-plane corners for TE1,0-TEq,0-mode conversion in rectangular waveguides, IEEE Trans. MTT. 54(6):2471-2477.
  10. Shcherbak, V.V., (1997), Matrix operators in the diffraction problems. Generalized reactance matrix method, Telecommunication and Radio Engineering. 51(2-3):175-182.
  11. Katselenbaum, B.Z., Korshunova, E.N., Pangonis, L.I., and Sivov, A.N., (1980), Reconstructing the antenna surface geometry and current distribution over the aperture from the given antenna pattern, Preprint, 9:39 (in Russian).
  12. Mos’pan, L.P., (2001), Diffraction and spectral properties of multi-slot resonant irises in a rectangular waveguide, Kand. Dissert. Kharkov: 185 p. (in Russian).
  13. Hag, T.U., Webb, K.J., and Gallagher, N.C., (1994), Scattering optimization method for design of compact mode converters for waveguides, IEEE Trans. MTT. 43(3):559-565.
  14. Saad, S.S., Davies, J.B., and Davies O.J., (1977), Computer analysis of gradually tapered waveguide with arbitrary cross sections, IEEE Trans. MTT. 25(5):437-440.


pages 1121-1138

Back