Communication science et technologie
Volume 6, Numéro 1, Pages 81-84
2008-01-01
Analysis And Design Of An Homogeneous And An Asymmetrical Rectangular Coaxial-to-microstrip Directional Coupler By The Finite Element Method
Auteurs : N. Benmostefa . N. Benahmed .
Résumé
ln this paper we present the analysis and the design of an homogeneous and an asymmetrical rectangular coaxial-to-microstrip directional coupler using the finite element method (FEM) [J}, [2}, [3}. This coupler is proposed for uses in high power applications in order to overcome the main drawbacks of coaxial, waveguide, and stripline couplers. The efJect of a metallic diaphragm, partially separating the asymmetrical inner conductors, is easily taken into account. This metallic diaphragm allows us to control easily the couplingfactor of the proposed coupler. The fact that we do not possess any numerical or experimental results in the scientific literature for this type of homogeneous coupler, we use the moment method (MoM) [4} to validate the results obtained by the finite element method. As an application, we present the design of a broad-band homogeneous coaxial-to-microstrip directional coupler operating in the frequency range [3-6} GHz with about 20 dB of coupling and with a high directivity (22 dB).
Mots clés
Homogeneous rectangular coaxial coupler, Coaxial-to-microstrip coupler, Metallic diaphragm, Analysis and design, Directional coupler, FEM method.
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