Computer-aided design of microstrip filters by iterated analysis

Author

Roan, Gary T. ; Zaki, Kawthar A.

Author_Institution

US Naval Res. Lab., Washington, DC, USA

Volume

36

Issue

11

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

1482

Lastpage

1487

Abstract

An iterative method for the design of microstrip low-pass elliptic function filters is described. The method, which is a direct extension of the work of H.J. Orchard (IEEE Trans. Circuit Syst., vol.CAS-32, no.11, p.1089-96, 1985), determines the microstrip line parameters that produce the same locations of the frequencies of transmission zeros and reflection zeros of an equivalent lumped-element prototype. Effects of the discontinuities at the junction are easily accounted for in the iteration. A design example is included, and an experimental seventh-order filter designed and constructed using the procedure gives measured results that agree closely with theory

Keywords

circuit CAD; distributed parameter networks; equivalent circuits; iterative methods; linear network synthesis; low-pass filters; microwave circuits; microwave filters; passive filters; poles and zeros; strip line components; CAD; computer aided design; equivalent lumped-element prototype; iterated analysis; low-pass elliptic function filters; microstrip filters; microstrip line parameters; passive microwave filters; reflection zeros; seventh-order filter; transmission zeros; Circuits; Design automation; Design methodology; Filtering theory; Frequency; Iterative methods; Low pass filters; Microstrip filters; Prototypes; Reflection;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.8911

Filename

8911