Abstract:
An annular antenna is composed of a ground plane, a short-circuit conductor, a radiation conductor and a parasitic conductor. The radiation conductor has a connection member and a feeder member. Two ends of the short-circuit member are respectively connected to the ground plane and connection member. The feeder member is close to the ground plane and has a notch. The short-circuit conductor and radiation conductor run along the ground plane defining an in-annular area. The radiation conductor has a first coupling edge beside the in-annular area. The parasitic conductor is inside the in-annular area with one end coupled to the ground plane and a second coupling edge along the first coupling edge. The first and second coupling edges have a gap therebetween. The radiation and parasitic conductors respectively excite low-frequency and high-frequency resonant modes. The annular antenna covers multiple frequency bands, has UWB features and simplified structure and favors mass-production.
Abstract:
An electrical connector includes a top plate, a first clamping plate extending integrally and downwardly from a first side of the top plate, and a second clamping plate extending integrally and downwardly from a second side of the top plate, and cooperating with the top plate and the first clamping plate to define a clamp for clamping a grounding plate. A connecting member extends integrally from the second side of the top plate and is connected electrically to a ground pattern provided on a circuit board of an antenna module.
Abstract:
Card printer having a horizontal platform and an angle-fixing platform allows for adjusting the angle-fixing platform's horizontal location on the horizontal platform. An inclined plane on the angle-fixing platform can fix a printhead of the printer for providing heaters on the printhead a best contact angle with a ribbon and a card. The printhead assembly of the card printer requires only the adjustment of the horizontal location of the printhead and it realizes quality control for printing with single parameter on a card printer.