“Sharpie has a great line of pens [but] the best Sharpie pen is the S-Gel ,” says Salazar, who prefers the 0.7mm nib (it also ...

Abstract: This letter presents a novel easy-to-manufacture ball-pen gap waveguide (GW) by utilizing commercial low-cost ball pens to have mechanical reconfigurability. The proposed ball-pen GW ...

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