volume | PIER Journals

2010-04-25

Estimation of Error Induced by a Crossed-Dipole Probe in the Near-Field

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. 21, 27-45, 2010

doi:10.2528/PIERB10030707

Abstract

The Moment Method is used to estimate the error induced by a compact measuring probe in the near-field. A crossed-dipole is used as a compact near-field measuring probe of a waveguide radiator in an infinite ground plane, since it measures both co-pole and cross-pole components simultaneously. However, due to multiple reflections between radiator and probe, in addition, mutual coupling effects between the poles, near-field values are changed. The relative sampled electric field pattern (without the probe) is compared to the relative sampled co-pole voltage pattern in the scan plane and the induced error is computed. The radiating waveguide's reflection coefficient is altered with respect to the reflection coefficient when there is no probe in the near-field. The numerical results concerning the reflection coefficient without the probe are compared to the measured values, and good agreement is observed.

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Paramesha, and Ajay Chakraborty, "Estimation of Error Induced by a Crossed-Dipole Probe in the Near-Field," Progress In Electromagnetics Research B, Vol. 21, 27-45, 2010.
doi:10.2528/PIERB10030707

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