Transient Fields of Parabolic Reflector Antennas

  • Sergey P. Skulkin
  • Victor I. Turchiu

Abstract

Requirements to increase the information content of radar and communication systems result in a band width increase and are a reason to investigate and describe the transient fields from ultra wideband (UWB) large antennas1. Furthermore, a need in such an analysis occurs in near field time domain antenna measurements2. In these cases not only the transient far field is of interest. The spatial-temporal near-field distribution is useful too to the optimal antenna arrangement on the complex objects. Mention must be made that many issues of the theory of an impulse radiating antenna. (IRA) are discussed by Carl E. Baum. Everett G. Fart and D. V. Giri3–8. The transient field from the circular focused aperture with uniform held distributions was considered in3. Much attention is given to IRA which consists of a large angle conical TEM feed that attach to a reflector antenna. It was shown that radiated held includes three distinct pacts. The first of these is the direct radiation from the feed structure (prepulse), whirl is of rather low magnitude, but lasts for a fairly long time This is followed by an impulse, which lasts for a brief time and is high in amplitude. Finally, there is a tail expected after the impulse. Closed-form expressions for prepulse were presented in 4. Analysis was extended to include the diffracted fields from the launcher plates and the circular rim of the reflector5. It was shown that there is an exact time-domain match of the spherical and planar TEM waves (inhomogeneous) at the reflector4–7. Thu exact expressions for the acoustic fields on the z axis for a circular aperture were obtained in 8. While the above-mentioned works describe basic properties of transient fields of an IRA, many questions are yet to be investigated.

Keywords

Radar Convolution Paral 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    C. E. Baum, “Impulse radiating antennas”,in book 1’ltra.- Wideband. Short-Pulse Electromagnetics, ed. by Bertroni et al., Plenum Press, 1993.Google Scholar
  2. 2.
    S. P. Skulkin. V. I. Turchin, et al., “The time-pulse method of measuring antenna. characteristic in near zone, Radiophysics and quantum electronics, vo1.32, nul, pp. 61–70, July 1989.Google Scholar
  3. 3.
    C. E. Baum, ’’Focused aperture antennas“, Sensor and Simulation note 3106, May 19 1987.Google Scholar
  4. 4.
    E. G. Farr and C. E. Baum, “Prepulse associated with the I,F,VI feed of an impulse radiating antennas” Sensor and Simulation note 337. March 1992.Google Scholar
  5. 5.
    D.V. Giri and C. E. Baum, “Reflector IRA Design and Boresight Temporal Waveforms”, Sensor and Simulation note 365, February 2 1994.Google Scholar
  6. 6.
    E. G. Farr and C. E. Baum, “A canonical scatterer for transient scattering range calibraion’ Sensor and Simulation note 342,.1 tine 1992.Google Scholar
  7. 7.
    C. E. Baum, und E. G. Farr, “Hyperboloidal scatterer for spherical TEM waves”, Sensor and Simulation note 342, June 1992.Google Scholar
  8. 8.
    C. E. Baum, “Circular Aperture Antennas in Time Domain”, Sensor and Simulation note 351, November 2 1992.Google Scholar
  9. 9.
    S. P. Skulkin, V. I. Turchin, “Radiation of nonsïuusoidal waves by aperture antennas.” Prue. EI’ROEM ‘84 Symposium, Bordeaux, France, 1. art2, pp. 1498–1504, May 1994.Google Scholar
  10. 10.
    R. C. Hansen, Microwave Scanning Antennas, vol.’, New York and London: Academic Press, 1964Google Scholar
  11. 11.
    M.Born, E.Wolf, Principles of Optics, Perganon Press, 1964.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Sergey P. Skulkin
    • 1
  • Victor I. Turchiu
    • 2
  1. 1.Radiophysical Research InstituteNizhny NovgorodRussia
  2. 2.Institute of Applied Physics Russian Academy of ScienceNizhny NovgorodRussia

Personalised recommendations