共 36 条
- [5] A Flexible Microstrip Low-Pass Filter Design Using Asymmetric Pi-Shaped DGS IEEE ACCESS, 2019, 7 : 49999 - 50006
- [9] Design of Planar Dual-Band Branch-Line Coupler with pi-Shaped Coupled Lines PROGRESS IN ELECTROMAGNETICS RESEARCH LETTERS, 2015, 55 : 113 - 120