Design of a Compact Planar Transmission Line for Miniaturized Rat-Race Coupler With Harmonics Suppression. - Ali Lalbakhsh; Golshan Mohamadpour; Saeed Roshani; Mohammad Ami; Sobhan Roshani; Abu Sadat Md. Sayem; Mohammad Alibakhshi Kenari; Slawomir Koziel (IEEE Access, 2021)