TELECOMMUNICATIONS AND RADIO ENGINEERING - 2012 Vol. 71,
No 2 		 

 

 

 

IMPROVING OF THE BROADBANDNESS FOR THE “PURE” WAVE CONVERSION BY A CASCADE OF STRIP DIAPHRAGMS IN PLANAR WAVEGUIDE



V.V. Shcherbak
Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine
E-mail: shcherbak@ire.kharkov.ua

Abstract
Optimization problem is considered for cascades of periodic strip diaphragms to provide efficient energy conversion of the fundamental -wave to a higher-order wave or energy exchange between - and -waves of the higher-order (with a flat-topped response function). The frequency range with high efficiency of such devices is considerably enlarged. This is achieved through the interaction of the - and -modes with minimum of their longitudinal beatings’ in different resonators (1 and 1 instead of 2 and 1). For this purpose the essentially different distances between diaphragms are chosen. Also, dielectric insertions and other constructional innovations are used.
KEY WORDS: periodical diaphragms, frequency range, other spectral regime, dielectric insertions

References

  1. Model, A.M., (1970), Microwave filters in radio-relay systems. Svyaz, Moscow: 352 p. (in Russian).
  2. Bae, J., Fujita, M., and Mizuno, K., (2001),A W-band overmoded-waveguide oscillator with Gunn diodes, IEEE Trans. MTT. 49(12):2554-2559.
  3. Shestopalov, V.P., Kirilenko, A.A., and Rud, L.A., (1986), Waveguide discontinuities, Naukova Dumka, Kiev: 216 p. (in Russian).
  4. 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.
  5. Shcherbak, V.V., (2009), “Pure” conversion regimes for higher-order ÒÅn,0- modes, effected by a cascade of three strip diaphragms of different periods, Telecommunications and Radio Engineering, 68(15):1121-1138.
  6. Katselenbaum, B.Z., Korshunova, E.N., Pangonis, L.I., and Sivov, A.N., (1982), Synthesis of waveguide transducer of the field, Radiotekhnika and Elektronika. 27(12):2373-2380 (in Russian).
  7. Haq, T.U., Webb, K.J., and Gallagher, N.C., (1995), Scattering optimization method for design of compact mode converters for waveguides, IEEE Trans. MTT. 43(3):559-565.
  8. 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.
  9. Marcuvitz, N., (1951), Waveguide Handbook, New York:McGraw-Hill, - 400 p.
  10. Shcherbak, V.V., (1968), Transverse metal gratings in a rectangular waveguide, Radiotekhnika, Ed. Kharkov univ., 7:49-51 (in Russian).
  11. Shestopalov, V.P. and Shcherbak, V.V., (1975), Matrix operators in the diffraction problems. Radiophysics and Quantum Electronics. 18(7):161-172.
  12. Shcherbak, V.V., (1982),Solution of the wave diffraction problem at irregularitieswith arbitrary numbers of strips and split over the period, DAN USSR, ser. A. 12:51-54 (in Russian).
  13. Shestopalov, V.P. and Shcherbak, V.V., (1996),Suppression of mode coupling by multielement diaphragms, Techn. Phys. Lett. 22(5):428-429.
  14. Shcherbak, V.V., (1997), Matrix operators in the diffraction problems. Generalized reactance matrix method, Telecommunication and Radio Engineering. 51(2-3):175-182.
  15. Shcherbak, V.V., (1966), Electromagnetic wave diffraction on the double equal-slot diaphragm with multilayer magnetodielectric, Radiotekhnika, Ed. Kharkov univ., 2:18-29 (in Russian).


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