Does anyone know what that slot is next to the sync button

Acrylic U Slot u slot This article introduces a characteristic mode analysis based broadband and high gain microstrip patch antenna by embedding U-slot into an E-shaped uplay 168 slot The design of U-slot microstrip patch antennas is the objective of this paper This U-slot patch antenna can produce dual band operation

uk slot site First, a primary design of flat, rectangular U-slot µ-strip patch antenna is designed around the center frequency of L1 band that is MHz Then, this