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Modeling radiation with an efficient hybrid finite-element integral-equation waveguide mode-matching technique

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3 Author(s)
Zuffada, C. ; Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA ; Cwik, T. ; Jamnejad, V.

A method is presented to model electromagnetic radiation, combining the finite-element technique in the penetrating portion of a three-dimensional (3-D) radiating structure with an integral equation on the outer surface of the computational domain, and with a waveguide mode-matching technique on a cross section of the feeding waveguide. The antenna can be of general shape, provided a portion of the surrounding medium up to a surface of revolution is chosen as part of the computational domain. This truncation scheme and the accurate source representation are more general than those existing in the literature for radiation modeling. An open-ended waveguide and a waveguide with a choke ring are analyzed and their radiation patterns are obtained and compared with available measurements

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:45 ,  Issue: 1 )