Wireless communications device

摘要

A wireless communications device capable of high quality radio communication. The present invention includes an antenna in which one surface of a grounding conductor and a planar radiating conductor are arranged approximately in parallel, a circuit board containing a wireless communications circuit that conducts radio communication via the antenna, and insertion means which holds the antenna and circuit board and which is inserted into an electronic device with the antenna sticking out. Therefore, when the present invention is inserted in the electronic device, current flowing through the radiating conductor generates an electric field between the grounding conductor and the radiating conductor in the direction from the grounding conductor to the radiating conductor to operate the radiating conductor almost alone as an antenna almost without operating the grounding conductor as an antenna. This makes it possible to prevent degradation of antenna characteristics and thus provides high quality radio communication.