Abstract: A public transport vehicle charging system is applied to multiple charging stations and an electric vehicle. The public transport vehicle charging system includes a server communicatively connected to the charging stations and the electric vehicle. The server is configured to establish a charging decision model according to multiple historical conditions and a transport schedule. The server is configured to calculate multiple ideal decisions according to the historical conditions and the transport schedule, so as to adjust multiple parameters in the charging decision model. When the electric vehicle drives toward a first charging station according to the transport schedule, the server is configured to input a current condition into the charging decision model, so as to selectively charge the electric vehicle by the first charging station. The current condition includes a current remaining power and a current position of the electric vehicle.

Abstract: A printed monopole antenna, having a spiral copper foil formed on a substrate of a printed circuit board is disclosed. The copper foil has two parallel conductive arms in communication with each other by at least another conductive arm extending across these two parallel conductive arms. The first one of the parallel conductive arms has one end reaching a lower edge of the substrate to serve as a signal feed point. The copper foil further has an adjust arm perpendicularly extending from an elongate edge of the second one of the parallel conductive arms towards the first one of the parallel conductive arm. The formation of the adjust arm expands the bandwidth of radio frequency of the antenna. Further, by changing the length of the adjust arm, the overall bandwidth of the antenna can be adjusted as required.