Analysis of coaxial-to-circular waveguide transition

Author

Yamamoto, Takayuki ; Urabe, Keiichiro ; Tsuda, Hiroyuki

Author_Institution

Nat. Inst. of Adv. Ind. Sci. & Technol. (AIST), Tsukuba, Japan

fYear

2014

fDate

6-11 July 2014

Firstpage

1497

Lastpage

1498

Abstract

The coaxial-to-circular waveguide transition is analyzed using the Galerkin´s method of moments. Because of the axisymmetric structure as well as the assumption of the TEM-mode incident wave, which is an axisymmetric mode, the scattered waves from the discontinuities in the coaxial and circular waveguides can be expressed as axisymmetric modes, and therefore, the analysis can be extremely simplified. The reflection characteristics are calculated as a function of frequency, and excellent agreement with the result presented in the reference literature is confirmed. This technique targets not only the nondestructive inspection of wall thinning and cracks inside conductive pipes but also the slot array antenna in circular waveguides.

Keywords

Galerkin method; TEM cells; circular waveguides; coaxial waveguides; cracks; inspection; method of moments; nondestructive testing; slot antenna arrays; Galerkin method of moments; TEM-mode incident wave; axisymmetric mode; axisymmetric structure; coaxial-to-circular waveguide transition analysis; conductive pipes; cracks; discontinuities; nondestructive inspection; reflection characteristics; scattered waves; slot array antenna; wall thinning; Electromagnetic waveguides; Inspection; Masers; Method of moments; Reflection; Waveguide transitions;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2014 IEEE

Conference_Location

Memphis, TN

ISSN

1522-3965

Print_ISBN

978-1-4799-3538-3

Type

conf

DOI

10.1109/APS.2014.6905074

Filename

6905074