Title :
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
fDate :
12/1/1999 12:00:00 AM
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;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
