Antenna and the method for adjusting the operation bandwidth thereof

摘要

A method for adjusting an operation bandwidth of an antenna is provided. The antenna includes a radiation element, and the radiation element includes a first adjusting portion having a first width and a second adjusting portion having a second width. The method includes steps of seeking an operation frequency of the antenna; and adjusting the operation bandwidth of the antenna by adjusting the second width based on the operation frequency.

主权项

1. A method for adjusting an operation bandwidth of an antenna, the method comprising the following steps:
providing an antenna that is connected to an electronic device and that includes only one radiation element having a length and a ground element, the radiation element includes a first adjusting portion having a first outer edge, a first inner edge spaced from the first outer edge defining a first width and a second inner edge extending substantially transverse to the first inner edge toward the first outer edge, a second adjusting portion extending from the first adjusting portion and having a second outer edge extending from the first outer edge and a third inner edge extending at a first inclined angle from the second inner edge defining a second width, and a single feeding terminal protruding from the third inner edge of the second adjusting portion, and the ground element includes a ground portion and a third adjusting portion extending between the ground portion and the second adjusting portion and having a third outer edge extending from the second outer edge of the second adjusting portion, a fourth outer edge extending substantially transverse to the third outer edge and a fourth inner edge spaced from the fourth outer edge, extending from the third inner edge of the second adjusting portion at a second inclined angle and defining a third width, the single feeding terminal being located directly between the second inner edge of the first adjusting portion and the fourth inner edge of the third adjusting portion such that the single feeding terminal is the only element extending between the first adjusting portion and the third adjusting portion; obtaining an operation frequency of the antenna by setting the length of the radiation element based on a specific ratio of a resonance wavelength of the antenna to the length of the radiation element; adjusting an impedance matching between the antenna and the electronic device by adjusting the third width of the third adjusting portion based on the operation frequency; and adjusting the operation bandwidth of the antenna by fixing the total width and by adjusting a first ratio value and a second ratio value based on the operation frequency and the impedance matching, wherein the first ratio value equals the second width divided by the total width, and the second ratio value equals the second width divided by the first width, and wherein the second width of the second adjusting portion is the same at both sides of the single feeding terminal.