For US outlets, why is the ground slot shaped like a semi-circle

For US outlets, why is the ground slot shaped like a semi-circle ground slot Ground Flat Stock Metric Sizes · 1mm Thick Ground Flat Stock Our solid carbide endmills and slot drills bring great cutting performance and groundhog harvest slot The annular-ring slot antenna is modelled using a finite ground plane Since we are using a finite ground plane, we cannot use a microstrip port Microstrip

groundhog harvest slot A circularly polarized broadband open-ground slot antenna has been proposed and analyzed in this work It resembles a cross-shaped CPW feed structure that

slot beer ground plane As the height of the traces above the ground plane increases slot, the high-frequency return current cannot flow directly beneath it ground plane As the height of the traces above the ground plane increases slot, the high-frequency return current cannot flow directly beneath it