Patent ID: 8339213
Filing Date: 2012-12-25
Classification: H01P,H01Q,H04B

Abstract:
1. A communication device comprising: a communication circuit unit processing a high-frequency signal transmitting data; a transmission path for the high-frequency signal, the transmission path being connected to the communication circuit unit; a ground; a coupling electrode supported by two terminals so as to face the ground and to be separated by a height negligible with respect to a wavelength of the high-frequency signal; and a resonating unit increasing a current flowing into the coupling electrode via the transmission path; wherein the resonating unit includes a first resonating unit connected to the transmission path, the first resonating unit comprising a stub having a phase length of an approximately ½ wavelength, and being short-circuited to the ground at another end not connected to the transmission path, and a second resonating unit having one end connected to an approximately center position of the first resonating unit and another end short-circuited to the ground, the second resonating unit having the terminals of the coupling electrode connected thereto, and a microdipole is formed of a line segment connecting a center of charges stored in the coupling electrode and a center of mirror-image charges stored in the ground, and the high-frequency signal is transmitted to a distant side disposed so as to face the communication device with an angle A formed relative to a direction of the microdipole being approximately 0 degree.