Abstract: An ultra-wideband electromagnetic band gap (EBG) structure includes multiple EBG units in an array. Each EBG unit includes a power plane, a dielectric substrate and a ground plane from top to bottom. The power plane includes a patch, a coupled complementary split ring resonator (C-CSRR) and a plurality of semi-improved Z-bridge structures. Each edge of the patch is provided with a semi-improved Z-bridge structure. The C-CSRR is provided within a ring formed by the semi-improved Z-bridge structures. The Z-bridge structure includes a first horizontal branch, a first vertical branch, a second horizontal branch and a second vertical branch connected in sequence. The second vertical branch is connected to the patch. First horizontal branches of adjacent EBG units are connected to each other. A circuit board including the aforementioned EBG structure is also provided.

Abstract: An entity positioning and supporting mechanism for closing side tongues of a box of a full-automatic packaging machine for flexible materials, comprising retractable positioning baffle mechanisms and retractable pressing head mechanisms respectively installed symmetrically on both sides of a box conveying passage of the main body of the packaging machine, a lifting entity supporting insertion plate mechanism provided on an upper portion of the main body of the packaging machine, a lifting oblique pushing mechanism located at the bottom of the box conveying passage; wherein said retractable positioning baffle mechanism is composed of a retractable positioning baffle having guide rods and a linear moving unit of the retractable positioning baffle.

Abstract: An entity positioning and supporting mechanism for closing side tongues of a box of a full-automatic packaging machine for flexible materials, comprising retractable positioning baffle mechanisms and retractable pressing head mechanisms respectively installed symmetrically on both sides of a box conveying passage of the main body of the packaging machine, a lifting entity supporting insertion plate mechanism provided on an upper portion of the main body of the packaging machine, a lifting oblique pushing mechanism located at the bottom of the box conveying passage; wherein said retractable positioning baffle mechanism is composed of a retractable positioning baffle having guide rods and a linear moving unit of the retractable positioning baffle.