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Focal Plane Characterization of Spot Focusing Horn Antennas for Free Space Microwave Dielectric NDE

Publication Type : Book Chapter

Publisher : Electromagnetic Nondestructive Evaluation XXII, Vol 44 of Studies in Applied Electromagnetics and Mechanics

Source : Electromagnetic Nondestructive Evaluation XXII, Vol 44 of Studies in Applied Electromagnetics and Mechanics (E book) . Pages74 - 79 DOI 10.3233/SAEM190014 Category Research Article. 2019

Url : The focal plane characterization of spot focusing horn antennas used for microwave NDE is presented using three experimental methods. Reflections from a metal sphere were analyzed in time domain to quantify the focal spot and spot size in the first method. In the second method, a rectangular waveguide padded with absorber was used as the sensor. Finally, graphene based miniaturized electric (E)-field sensor printed on photo paper using inkjet printing was used to measure antenna focal plane characteristics. The focal plane measured using the metal ball and waveguide techniques was within 5% of the simulated value. Higher error was recorded in focal spot measurement (≥25%) for the first two methods. The focal plane and spot size measured by the miniaturized E-field sensor was within 10% of the simulated antenna characteristics. The results indicate that the flexible printed sensor has better measurement accuracy and simple setup for field measurement.

Campus : Chennai

School : School of Engineering

Center : Amrita Innovation & Research

Department : Electronics and Communication

Verified : Yes

Year : 2019

Abstract : The focal plane characterization of spot focusing horn antennas used for microwave NDE is presented using three experimental methods. Reflections from a metal sphere were analyzed in time domain to quantify the focal spot and spot size in the first method. In the second method, a rectangular waveguide padded with absorber was used as the sensor. Finally, graphene based miniaturized electric (E)-field sensor printed on photo paper using inkjet printing was used to measure antenna focal plane characteristics. The focal plane measured using the metal ball and waveguide techniques was within 5% of the simulated value. Higher error was recorded in focal spot measurement (≥25%) for the first two methods. The focal plane and spot size measured by the miniaturized E-field sensor was within 10% of the simulated antenna characteristics. The results indicate that the flexible printed sensor has better measurement accuracy and simple setup for field measurement.

Cite this Research Publication : Jayaram Kizhekke Pakkathillam, Balamurugan T. Sivaprakasam, Jayaprakash Poojali, Nitheesh M. Nair, Parasuraman Swaminathan, C.V. Krishnamurthy, Kavitha Arunachalam "Focal Plane Characterization of Spot Focusing Horn Antennas for Free Space Microwave Dielectric NDE" in Electromagnetic Nondestructive Evaluation XXII, Vol 44 of Studies in Applied Electromagnetics and Mechanics (E book) . Pages74 - 79 DOI 10.3233/SAEM190014 Category Research Article. 2019

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