An antenna (20) is provided that is composed of printed wiring on a circuit board and that is compact, broadband, and omnidirectional in a horizontal plane. The antenna (20) is disposed in a substantially-rectangular antenna region (D) longer in a Z direction on a circuit board. Further, the antenna (20) has a first pad (21), a second pad (22), a radiating element (23), a meandering element (24),and a third pad (26). The radiating element (23) is capacitively coupled to the first pad (21). In addition, the third pad (26) is capacitively coupled to the second pad (22).