Antenna

An antenna comprising:

• a first conductor plate and a second conductor plate, the second conductor plate being disposed in the first conductor plate so as to be apart from the first conductor plate with a distance between both plates;
• wherein the first conductor plate includes a first U-shaped portion, the first U-shaped portion being formed in a U-shape so as to include a first side portion, a second side portion opposed to the first side portion, and a first front portion connected between the first side portion and the second side portion;
• wherein the second conductor plate includes a second U-shaped portion, the second U-shaped portion being formed in a U-shape so as to include a third side portion, a fourth side portion opposed to the third side portion, and a second front portion connected between the third side portion and the fourth side portion;
• wherein the second front portion is opposed to the first front portion;
• wherein the first front portion has a slot formed therein so as to divide at least one area of the first front portion into a first surface portion and a second surface portion;
• wherein the first surface portion has a first feeding point;
• and
• wherein the second surface portion has a second feeding point.