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A test-bed validation of electromagnetic surface wave propagation along a dielectric-coated metal pipe

Show simple item record Gatti, Mark Lin, Hungsheng Long, Ezra Sosnowski, John Jamnejad, Vahraz 2019-05-01T17:25:56Z 2019-05-01T17:25:56Z 2016-03-05
dc.identifier.citation IEEE Aerospace Conference, Big Sky, Montana, March 5-12, 2016 en_US
dc.identifier.clearanceno 16-0071
dc.description.abstract This paper provides a summary of the results of an attempt at experimental verification of the propagation of electromagnetic surface waves at microwaves frequencies, in and along the uniform dielectric coating of a circular cylindrical metal pipe, based on the previously established theoretical investigation. These experimental results are of value for the diagnostic of anomalies on the surface of tar-coated pipes used in protecting the underground power transmission cables (feeder pipes). A test-bed was designed and implemented using an aluminum tubes (10” diameter) with an acrylic tube coating (0.25” thickness). Two identical wave launcher/receiver arrays, each of 32 elements around the tube for relatively uniform radiation/reception, were designed and fabricated at the frequency of interest (~6 GHz). This arrangement was put in a specially designed small anechoic chamber and attached to a network analyzer. A variety of tests were performed to establish the launch efficiency, prove surface wave propagation along, and reflection from different types of anomalies on the coating. In the paper, a number of test results and supporting graphs will be provided and future work for improving the performance of the launch array and the test-bed arrangement for better results will be outlined. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2016 en_US
dc.title A test-bed validation of electromagnetic surface wave propagation along a dielectric-coated metal pipe en_US
dc.type Preprint en_US

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