Wideband Microstrip 90° Hybrid Coupler Using High Pass Network

Figure 4

Layouts of the proposed coupler and the conventional 2-section branch-line coupler with same scale: 𝑊₀=5.32 mm, 𝐿_𝐴=56.5 mm, 𝐿_𝐵=62.8 mm, 𝑊_𝐵=1.00 mm, and 𝐿_𝐻=7.0 mm. 𝐿₁=59.4 mm, 𝑊₁=8.42 mm, 𝐿₂=59.6 mm, 𝑊₂=0.99 mm, and 𝑊₃=7.52 mm.