Abstract:
A monopole antenna apparatus with dual purposes of being a multi-band mobile phone and a global positioning system. The antenna is formed on a substrate, and the substrate comprises a flat surface, a cambered surface, a first radiating metal line, including one high-frequency resonant path and one low-frequency resonant path, a second radiating metal line, a first feeding point, and a second feeding point. The high-frequency resonant path and the low-frequency resonant path for receiving and transmitting the signals of the multi-band mobile phone system are formed on the flat surface and the cambered surface separately, and both are connected to the first feeding point. The second radiating metal line for receiving the signals of the global positioning system is formed on the cambered surface and is connected to the second feeding point.
Abstract:
A system and a method for asynchronously electronic messages exchanging are disclosed. The system includes a server and more than one clients. Each client has a geographic parameter generator and a message transmitter. The geographic parameter generator is configured to generate a geographic parameter. The message transmitter is configured to transmit the electronic message including a content body and the geographic parameter. The server is composed of a receiver, a database, a matching unit, and a processor. The receiver is configured to receive the electronic message from the clients. The database is used to store the received electronic message. The matching unit compares the geographic parameter of the received message to other existing electronic messages stored in the database according to a set of preset matching rules. A matching list is generated if the match is determined. The processor interacts with at least one of the clients in the matching list.