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Microwave PCB Structure Considerations: Microstrip vs. Grounded Coplanar Waveguide

An overview and comparison of microstrip and Grounded Coplanar Waveguide (GCPW) PCB structures. Comparisons are shown between microstrip and GCPW when the coplanar circuits are tightly and loosely coupled. Additional information is given regarding copper plating thickness variation and the impact of Electroless Nickel / Immersion Gold (ENIG) for microwave and millimeter-wave concerns.
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