Antenna and electronic device for close proximity wireless communication

摘要

According to one embodiment, an antenna includes first and second coupling elements and first to fourth connecting elements. An electrical length between a middle point of the first coupling element and each of both open ends thereof is a first electrical length which is an odd multiple of ¼ of a wavelength λ corresponding to a frequency used for close proximity wireless communication. An electrical length between a middle point of the second coupling element and each of both open ends thereof is the first electrical length. An electrical length of each of the first to fourth connecting elements is a second electrical length which is an odd multiple of ¼ of the wavelength λ.

主权项

1. An antenna comprising:
a first coupling element comprising a first open end and a second open end, the first coupling element extending in a first direction; a second coupling element comprising a third open end and a fourth open end, the second coupling element facing the first coupling element across a gap and extending parallel to the first coupling element; a first connecting element connecting a positive-side feed point of a feed terminal and a middle point between the first and second open ends of the first coupling element, the feed terminal positioned between the first coupling element and the second coupling element; a second connecting element connecting a connecting point positioned between the first coupling element and the second coupling element and the middle point of the first coupling element; a third connecting element connecting a ground-side feed point of the feed terminal and a middle point between the third and fourth open ends of the second coupling element; and a fourth connecting element connecting the connecting point and the middle point of the second coupling element, wherein an electrical length between the middle point of the first coupling element and each of the first and second open ends is a first electrical length which is an odd multiple of ¼ of a wavelength λ corresponding to a frequency used for close proximity wireless communication; an electrical length between the middle point of the second coupling element and each of the third and fourth open ends is the first electrical length; and an electrical length of each of the first, second, third and fourth connecting elements is a second electrical length which is an odd multiple of ¼ of the wavelength λ.