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The computation of the input impedance of a biconical antenna by means of a method of segmentation based on 3D finite elements
Author(s) -
Ma Gil José,
Rubio Jesús,
Zapata Juan
Publication year - 2003
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.508
Subject(s) - computation , admittance parameters , finite element method , antenna (radio) , admittance , electrical impedance , impedance matching , impedance parameters , matrix (chemical analysis) , ridge , radiation impedance , coupling (piping) , acoustics , computer science , optics , mathematical analysis , mathematics , algorithm , physics , engineering , structural engineering , materials science , telecommunications , electrical engineering , mechanical engineering , composite material , biology , paleontology , voltage
The analysis of structures with complex geometries leads to the use of three‐dimensional numerical methods. Such devices can be unmanageable unless a segmentation technique is applied. In this work, a hybrid 3D finite‐element‐mode matching method, based on the generalized admittance matrix (GAM) is applied to the computation of the input impedance of a biconical antenna fed by a cylindrical cavity loaded with resonant slots and matched by a coupling network composed of three multi‐ridge circular irises and sections of circular waveguides. The structure is segmented into regions which are analysed separately and, by means of linking the partial matrices calculated, the generalized scattering matrix (GSM) is obtained. In order to validate the method, numerical results and measurements are compared. Copyright © 2003 John Wiley & Sons, Ltd.