Patent ID: 9692140
Date: 2017-06-27
CPC Classifications: H01Q

Claim:
1. An antenna apparatus comprising: a conductor plate having a prescribed shape having a first side and a second side adjacent to the first side; a first feed element having a strip shape, a first end connected to a first feeding point, and an open second end; a first parasitic element having a strip shape, a first end connected to the conductor plate, and an open second end, the first parasitic element isolating direct current from the first feed element, at least at a portion of the first parasitic element that is opposed to the first feed element; a second feed element having a strip shape, a first end connected to a second feeding point, and an open second end; a second parasitic element having a strip shape, a first end connected to the conductor plate, and an open second end, the second parasitic element isolating direct current from the second feed element, at least at a portion of the second parasitic element that is opposed to the second feed element; a third feed element having a strip shape, a first end connected to a third feeding point, and an open second end; and a third parasitic element having a strip shape, a first end connected to the conductor plate, and an open second end, the third parasitic element isolating direct current from the third feed element, at least at a portion of the third parasitic element that is opposed to the third feed element, wherein: the first end of the second parasitic element and the first end of the third parasitic element are located on the first side of the prescribed shape of the conductor plate, and the first end of the first parasitic element is located on the second side of the prescribed shape of the conductor plate, a distance between the first end of the second parasitic element and the first end of the third parasitic element is longer than a distance between the first end of the first parasitic element and the first end of the second parasitic element, a part of the second feed element that includes the open second end of the second feed element extends in a first direction, a part of the third feed element that includes the open second end of the third feed element extends in a second direction opposite the first direction, and a part of the first feed element that includes the open second end of the first feed element extends away from the second and third feed elements in a third direction which is orthogonal to the first and second directions.