Patent ID: 8378909
Filing Date: 2013-02-19
Classification: H01Q

Abstract:
1. An antenna comprising: a dielectric base; and at least two radiation electrodes including a first radiation electrode that is provided on a surface of the dielectric base or embedded in the dielectric base and a second radiation electrode that is provided on the surface of the dielectric base or embedded in the dielectric base, the first radiation electrode including an open terminal at one end of the first radiation electrode and a feeding terminal at the other end of the first radiation electrode so as to constitute a monopole antenna, the second radiation electrode including a capacitive-coupling feeding electrode at one end of the second radiation electrode and a ground connection terminal at the other end of the second radiation electrode so as to constitute a capacitive feed antenna; wherein the open terminal of the first radiation electrode is located opposite to the capacitive-coupling feeding electrode of the second radiation electrode when viewed in a length direction of the dielectric base such that the open terminal of the first radiation electrode and the capacitive-coupling feeding electrode of the second radiation electrode are spaced apart from one another by a greater distance than a distance between any other portions of the first and second radiation electrodes; the first radiation electrode and the second radiation electrode are fed independently of each other by respective feeder circuits; and the first radiation electrode includes a ground connection electrode to achieve matching, and an end of the matching ground connection electrode is connected to the ground connection terminal of the second radiation electrode.