C.-F. HungA.-S. LiuC.-H. ChienC.-L. WangRUEY-BEEI WU2018-09-102018-09-102005-0215311309http://scholars.lib.ntu.edu.tw/handle/123456789/317557https://www.scopus.com/inward/record.uri?eid=2-s2.0-13844281402&doi=10.1109%2fLMWC.2004.842862&partnerID=40&md5=c3ef2e340c859daa42deb121c5aaa632This paper proposes a broadband transition design between conductor-backed coplanar waveguide (CB-CPW) and rectangular waveguide based on the concept of the multisection transformer. The genetic algorithm (GA) was adopted to efficiently optimize the multisection transformer for achieving wideband performance. Using a multisection of order 3, a V-band transition realized on an Al2O3 substrate could achieve 25% bandwidth with a return loss better than 20 dB. Two transitions connected back to back were realized to demonstrate the feasibility of the transition. Also, a tolerance analysis was performed via the simulation to verify the robustness of this transition design.Antennas; Bandwidth; Computer simulation; Genetic algorithms; Optical design; Permittivity; Substrates; Conductor backed coplanar waveguides (CB-CPW); Multisection transformers; Slot-lines; Waveguide transition; Waveguidesjournal article10.1109/LMWC.2004.8428622-s2.0-13844281402WOS:000226792000028