Designing high-performance finline tapers with vector-based optimization

Author

Vale, Christopher A W ; Meyer, Petrie

Author_Institution

Dept. of Electron. Eng., Stellenbosch Univ., South Africa

Volume

47

Issue

12

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

2467

Lastpage

2472

Abstract

In this paper, a novel two-step optimization algorithm is presented for the design of high-performance finline tapers. The first step utilizes a focusing approach, where the optimization is performed with an increasing number of variables, while the second step exploits the vector representation of the integral form of the reflection coefficient of smoothly varying tapers. A few high-performance X-band tapers are designed and measured, including one measuring only 0.47λ₀ (17.5 mm) at 8 GHz with a 25-dB reflection bandwidth of 7.4-11.3 GHz, and one designed to work without a quarter-wave notch transformer, with a 30-dB reflection bandwidth of 8.1-10.9 GHz

Keywords

circuit CAD; circuit optimisation; convergence of numerical methods; fin lines; microstrip circuits; waveguide transitions; 7.4 to 11.3 GHz; 8.1 to 10.9 GHz; CAD; X-band tapers; convergence; finline circuits; finline tapers design; focusing approach; high-performance finline tapers; integral form; reflection coefficient; smoothly varying tapers; two-step optimization algorithm; vector representation; vector-based optimization; Algorithm design and analysis; Bandwidth; Design optimization; Dielectrics; Displays; Finline; Frequency; Impedance; Propagation constant; Reflection;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.808994

Filename

808994