Can directional coupler be planar
Yes, planar directional couplers (e.g., microstrip or stripline) enable compact integration (<5mm² footprint) with broadband performance (2-40GHz). They achieve tight coupling (3-20dB) via λ/4 spaced traces (0.1mm precision) on FR4/Rogers substrates, offering low loss (<0.2dB/mm) but trade isolation (15-25dB vs. 30dB in waveguide). Ideal for 5G/MMIC apps where size/weight matters. What is a Directional Coupler? […]
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