Chu, Peng; Hong, Wei; Zheng, Kai-Lai; Yang, Wen-Wen; Xu, Feng; Wu, Ke: 'Balanced hybrid SIW–CPW bandpass filter', Electronics Letters, 2017, 53, (25), p. 1653-1655, DOI: 10.1049/el.2017.3649
IET Digital Library, https://digital-library.theiet.org/;jsessionid=32h5kmopjjt7r.x-iet-live-01content/journals/10.1049/el.2017.3649