RADIO DEVICE

摘要

A radio device includes a rectangular substrate including first and second opposite sides and third and fourth opposite sides; a ground plane formed in the substrate, cut out along the third side from a corner at one end of the second side; a first monopole antenna extending away from the ground plane along the third side from a first feeding unit provided on the third side; a second monopole antenna extending away from the ground plane along the fourth side from a second feeding unit provided on the fourth side; and a ground element formed in the ground plane, extending toward the second side along the third side, from one end of the ground element connected to the ground plane. A length from the first feeding unit through the one end to another end of the ground element corresponds to one fourth of a wavelength of radio waves.

主权项

1. A radio device comprising:
a substrate having a rectangular shape including a first edge side and a second edge side constituting opposite sides and a third edge side and a fourth edge side constituting another set of opposite sides; a ground plane formed in the substrate by cutting out an area along the third edge side from a corner part at one end of the second edge side; a first antenna element of a monopole type that extends away from the ground plane along the third edge side from a first feeding unit provided on a side of the third edge side on the substrate; a second antenna element of a monopole type that extends away from the ground plane along the fourth edge side from a second feeding unit provided on a side of the fourth edge side on the substrate; and a ground element formed in the substrate in the area that is cut out to form the ground plane, the ground element extending toward the second edge side along the third edge side, from one end of the ground element that is connected to the ground plane, wherein a length extending from the first feeding unit through the one end of the ground element to another end of the ground element corresponds to a length of one fourth of a wavelength of radio waves that are transmitted/received.