A robust simulation-driven design methodology of microwave circuits with complex topologies has been presented. The general method elaborated is suitable for a wide class of N-port unconventional microwave circuits constructed as a deviation from classic design solutions. The key idea of the approach proposed lies in an iterative redesign of a conventional circuit by a sequential modification and optimisation of its atomic building blocks. The speed and accuracy of the method presented has been acquired by solving a number of simple optimisation problems through surrogate-based optimisation (SBO) techniques, which offer a satisfactory approximation of the optimal design solution. Two exemplary designs have been supplied to verify the method introduced. An abbreviated wideband quarter-wave impedance matching transformer (MT) and a miniaturised hybrid branch-line coupler (BLC) have been developed. Diminished dimensions of the circuits under construction have been achieved by means of compact microstrip resonant cells (CMRCs). As a SBO engine, an implicit space mapping (ISM) technique has been utilised. The final results have been acquired in only a fraction of time that is necessary for a direct EM optimisation to generate competitive results. An experimental validation of the method proving its high utility has been provided.
Authors
Additional information
- Category
- Publikacja w czasopiśmie
- Type
- artykuł w czasopiśmie wyróżnionym w JCR
- Language
- angielski
- Publication year
- 2012
