OPTIMUM DESIGN OF MULTIHOLE DIRECTIONAL-COUPLERS WITH ARBITRARY APERTURE SPACING

Authors
Citation
H. Oraizi, OPTIMUM DESIGN OF MULTIHOLE DIRECTIONAL-COUPLERS WITH ARBITRARY APERTURE SPACING, IEEE transactions on microwave theory and techniques, 46(4), 1998, pp. 331-342
Citations number
17
Categorie Soggetti
Engineering, Eletrical & Electronic
ISSN journal
00189480
Volume
46
Issue
4
Year of publication
1998
Pages
331 - 342
Database
ISI
SICI code
0018-9480(1998)46:4<331:ODOMDW>2.0.ZU;2-Y
Abstract
A numerical procedure based on the method of least squares is presente d for the optimum design of multihole directional couplers with a spec ified number of apertures and their arbitrary spacing in a desired fre quency band for a given coupling coefficient (C) together with maximiz ation of the mean value of isolation (I) or equivalently directivity ( D) across the band and also specified values of (C) and (D) (or equiva lently isolation I), An error function is constructed in the band for optimization of C and D or I, which after minimization gives the best values of the hole radii and spacing, The proposed method is quite sui table for computer-aided design (CAD) and has several advantages over common design methods for multihole directional couplers, such as simp licity of analysis and development of the numerical algorithm, flexibi lity of hole spacing, specification of the desired values of C and D o r I, and actual optimization of the coupler design in the desired freq uency band. The proposed method is potentially applicable to the desig n of other couplers.