Patent ID: 8391784
Filing Date: 2013-03-05
Classification: 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 printed board having an upper surface on which a printed pattern is formed, a lower surface, and a through hole penetrating through the printed board; a ground formed on the lower surface of the printed board; a coupling electrode separated from the ground and supported to face the ground; a stub connected to the ground on the lower surface via the through hole and configured to operate as a distributed constant circuit; a resonating unit increasing a current flowing into the coupling electrode via the transmission path; an extended section formed of a conductor disposed proximate to a front of the coupling electrode with an angle θ formed relative to a direction of a microdipole being approximately 0 degree, the microdipole 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, the conductor extends substantially long in the lateral direction approximately orthogonal to a propagating direction of an electric-field signal occurring from the front of the coupling electrode; and wherein the extended section is a metal plate having a thin rectangular sectional shape with a narrow bottom surface, wherein the extended section further extends in the propagating direction of an electric field signal occurring from the front of the coupling electrode.