TELECOMMUNICATIONS AND RADIO ENGINEERING - 2010 Vol. 69,
No 13 		 

 

 

 

FAR-FIELD ZONE RANGE OF WAVEGUIDE OSCILLATORS


N.N. Gorobets, Ye.Ye. Îvsyannikova, & À.V. Shishkova

V. Karazin National University of Kharkov,
4, Svoboda Sq., Kharkiv, 61077, Ukraine
«Address all correspondence to À.V. Shishkova E-mail: shishkova@univer.kharkov.ua

Abstract
The amplitude and phase characteristics of the radiation from an open end of the rectangular waveguide excited by the fundamental mode Í10–wave at an arbitrary range from the oscillating aperture are investigated on the basis of the Hertz potentials method in Kirchhoff formulation. The criteria for estimation of the boundary of the far-zone of small as compared to the wavelength waveguide oscillators, for which the classic formula of calculation of the far-zone is inacceptable, are introduced. Investigations of oscillation characteristics are performed according to the suggested estimation criteria and the far-zone boundaries are established for the waveguide oscillators having smaller dimensions than the wavelength in the waveguide.

KEY WORDS: rectangular waveguides, microwaves, far zone boundary, amplitude and phase characteristics of oscillation

References

  1. Shubarin, Yu.V., (1960), Microwave (SHF) antennas. Kharkiv State University Publishers,
    Kharkiv: 283 p. (in Russian).
  2. Gorobets, N.N., (1991), Particularities of wave processes in near zone of electric and magnetic fields meters, Trans. III Republican Conf. “Methods and technique for measuring in the domain of electromagnetic compatibility”. Vinnytsya, Ukraine, pp.95-100 (in Russian).
  3. Laybros, S. and Combed, P.F., (2004) On Radiating-Zone Boundaries of Short, λ/2, and λ Dipoles. IEEE Antennas and Propagation Magazine, 46(5):53-64.
  4. Gorobets, N.N. and Shishkova, A.V., (2006), Near-Field Distribution of Linear and Aperture Antennas, Proc. the 3rd International Conference on Ultrawideband and Ultrashort Impulse Signals (UWBUSIS’06), 18-22 September, Sevastopol, Ukraine, pp.38-43 (in Russian).
  5. Gorobets, N.N., Gorobets, Yu.N., and Tsekhmistro, R.I., (2000), Characteristics of electromagnetic fields in near zone of short wire antennas, Bulletin of Kharkiv National University, Radio Physics and Electronics, 467:62-66 (in Russian).
  6. Gorobets, N.N. and Tsekhmistro, R.I., (2001), Near-zone effects of resonant wire antennas, Bulletin of Kharkiv National University, Radio Physics and Electronics, 513:112-118 (in Russian).
  7. Gorobets, N.N., (1980), Amplitude, phase and polarization characteristics of aperture antennas in near, intermediate and far zones, Bulletin of Kharkiv National University, Radio Physics and Electronics, 203:26-34 (in Russian).
  8. Voloshin, V.À. and Gorobets, N.N., (1971), Polarization characteristics of rectangular aperture in near zone, in: Microwave frequencies antenna feeders and measuring devices, Trans. Kharkiv State University, Kharkov: 29-36 (in Russian).
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  10. Gorobets, N.N. and Shishkova, A.V., (2002), Characteristics of electromagnetic oscillation from open end of circular waveguide in near and intermediate zones, Radiotekhnika and elektronika, 47(5):579-582 (in Russian).


pages 1153-1163

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