Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › Not applicable › peer-review
Related Research Unit(s)
|Journal / Publication||IEEE Microwave Magazine|
|Publication status||Published - Oct 2011|
|Link to Scopus||https://www.scopus.com/record/display.uri?eid=2-s2.0-80052583049&origin=recordpage|
The optimization of a differential phase shifter through a multiobjective optimization algorithm was examined. The optimization algorithms given in IE3D handle multiobjective optimization by combining the objective values as a weighted sum and another type of optimization routine uses the Pareto-dominance principle in handling multiobjective optimization. Differential phase shifters were used to produce the necessary differential phase difference between the phase changes across a main line and a reference line. The main line of the Schiffiman phase shifter was composed of a coupled line with an even mode impedance and odd mode impedance. The solution selected from nondominated solution sets obtained by Multiobjective Evolutionary algorithm (MOEA) was fabricated and measured. The results showed that the 90° phase shifter operated at 2.70-5.29 GHz with a differential phase shift of 90° ± 5°, while the 45° phase shifter operated at 3.21-5.00 GHz with a differential phase shift of 45° ± 5°.