volume | PIER Journals

2008-04-28

Waveguide as a Near-Field Measuring Probe of the Two-Element Array Radiator

Paramesha,

Dr. Paramesha

Department of Electronics & Electrical Communication Engineering

Indian Institute of Technology

India

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Ajay Chakraborty

Professor Ajay Chakraborty

Department of Electronics and Electrical Communication Engineering

Indian Institute of Technology

India

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Progress In Electromagnetics Research B, Vol. 7, 245-255, 2008

doi:10.2528/PIERB08032401

Abstract

In the analysis, an open-ended rectangular waveguide in an infinite ground plane is used as a near-field probe and the two-element waveguide array in an infinite ground plane is used as a radiator. Moment method analysis is used to find the reflection coefficient of the array element and probe voltage. The reflection coefficient of the array element, which is also an open-end of a rectangular waveguide, is computed and compared with the reflection coefficients, when the probe is at different positions in the near-field. The computations have also been carried out to find the induced probe voltage, when the probe scan in transverse plane (planar scanning) at a distance z₁ from the radiator. Good agreement is obtained between measured and MOM results.

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Paramesha, and Ajay Chakraborty, "Waveguide as a Near-Field Measuring Probe of the Two-Element Array Radiator," Progress In Electromagnetics Research B, Vol. 7, 245-255, 2008.
doi:10.2528/PIERB08032401

References

1. Harrington, R. F., Field Computation by Moment Method, Roger E. Krieger Publishing Company, USA, 1968.

2. Paramesha, S. and A. Chakrabarty, "Moment method analysis of rectangular waveguide as near-field measuring probe," Microwave and Optical Technology Letters, Vol. 48, No. 9, September 2006.
doi:10.1002/mop.21798

3. Harrington, R. F., Time-Harmonic Electromagnetic Fields, McGraw-Hill, New York, 1961.

4. Subrata, G., "Electromagnetic field estimation in aperture and slot antennas with their equivalent network representation," Ph.D. Dissertation, Department of E&ECE, IIT, Kharagpur, India, 1996.