Planar 180° hybrid coupler with non-interspersed ports for millimeter-wave applications | International Journal of Microwave and Wireless Technologies | Cambridge Core
Figure 1 from Multilayer 180$^{\circ}$ Coupled Line Hybrid Coupler | Semantic Scholar
Microwaves101 | Hybrid (3 dB) couplers
STRIPLINE 180 DEGREE HYBRID COUPLERS - ET Industries