Moment method approach to analyze waveguide array radiator with crossed dipole as a near field sensor

  • Abstract
  • Keywords
  • References
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  • Abstract

    Moment method approach is used to estimate the error encountered by the sensor in the near field and probe measures co-pole and cross-pole voltages at the same time. Conversely, due to several reflections between the waveguide and dipole sensor, near field values are changed. Calculations are done to analyze the absolute sampled co-pole voltage pattern and relative sampled electric field (without probe) pattern in the scan plane, and inaccuracy induced by the sensor is determined. The waveguide reflection coefficient, radiation admittance and susceptance with measuring sensor are reformed with respect to the equivalent values in the absence of the sensor in the near field.


  • Keywords

    Admittance; Moment Method; Reflection Coefficient; Susceptance; Waveguide.

  • References

      [1] G. V. Borgiotti, “Fourier transform method in aperture antenna problems,” Alta Frequenza, vol. 32, Nov. 1963.

      [2] R. J. Mailloux, “Radiation and near-field coupling between two collinear open-ended waveguides,” IEEE Trans. on Antennas and Propagation, vol. AP-17, Jan. 1969.

      [3] G. V. Borgiotti, “A novel expression for the mutual admittance of planar radiating elements,” IEEE Trans. on Antennas and Propagation, vol. AP-16, pp. 329-333, May 1968

      [4] A. D. Yaghjian, “Efficient computation of antenna coupling and fields within the near-field region,” IEEE Trans. on Antenna and Propagation, vol. AP-30, No. 1, Jan. 1982.

      [5] H. Baudrand, Jun-Wu Tao and J. Atechian “Study of radiating properties of open-ended, rectangular waveguides,” IEEE Trans. on Antennas and Propagation, vol. AP-36, pp. 1071-1077, Aug. 1988.

      [6] D.G. Bodnar and D.T. Paris, “New variational principle in electromagnetics,” IEEE Trans. Antennas Propagation, vol. AP-19.216-223, Mar.1970.

      [7] R.H. MacPhie and A.I. Zaghloul, “Radiation from a rectangular waveguide with infinite flange: Exact solution by correlation matrix,” IEEE Trans. Antennas Propagation, Vol. AP-28, pp 497- 503,1980.

      [8] Paramesha and A. Chakrabarty, “Waveguide as a Near Field Measuring Probe of the Two Element Array Radiator.” Progress In Electromagnetics Research B, Vol.7, pp 245-255, 2008.

      [9] Paramesha and A. Chakrabarty, “Near-Field Distraction due to the Probe,” International conference on Antenna and Technology, Space Application Centre, ISRO, Ahmadabad, Feb. 2005.

      [10] Paramesha and A. Chakrabarty, “Near-Field Measurement Using Crossed Dipole,” International Radar Symposium India, IRSI-05, Bangalore, Dec. 2005.

      [11] J.H. Kim, B. Enkhbayar, J.H. Bang, and B.C. Ahn, “New formulas for the Reflection Coefficient of an Open-ended Rectangular Waveguide Radiating into air Including the Effect of Wall Thickness or Flange,” Progress in Electromagnetics Research M, Vol. 12, 143–153, 2010.




Article ID: 29646
DOI: 10.14419/ijet.v8i4.29646

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