1. Technical Field
The disclosure generally relates to antenna structures, and particularly to an antenna structure having a broad working frequency band.
2. Description of Related Art
Antennas are important components of portable wireless communication devices such as mobile phones and personal digital assistants (PDAs) used for transmitting and receiving signals.
To ensure that the portable wireless communication device can communicate with other devices in wireless communication systems having different working frequencies, the antenna needs a broad working frequency.
Additionally, antennas having broad working frequency tend to occupy a large space in the wireless communication device, which may hinder the miniaturization of the wireless communication device.
Therefore, there is room for improvement within the art.
Many aspects of the present disclosure can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure.
The antenna structure 100 includes a base board 10, a radiating unit 30, and a feed unit 50. The radiating unit 30 and the feed unit 50 are formed on the base board 10. The feed unit 50 is partially overlapped on the radiating portion 30.
The base board 10 is a part of a housing of the wireless communication device. In this embodiment, the base board 10 is made of metal. The radiating unit 30 and the feed unit 50 are directly formed on the base board 10 to reduce cost of the antenna structure 100 and also make the entire antenna structure 100 occupy relative smaller space in the wireless communication device.
The radiating unit 30 is a slot antenna and is substantially U-shaped. The radiating unit 30 includes a first radiating section 31, a second radiating section 32 and a connecting section 33. The first radiating section 31, the second radiating section 32 and the connecting section 33 are strip-shaped. A length of the second radiating section 32 is slightly shorter than the first radiating section 31. The first radiating section 31 is spaced from and parallel to the second radiating section 32. One end of the first radiating section 31 is aligned with that of the second radiating section 32. The connecting section 33 is connected to the two aligned ends of the first and second radiating sections 31, 32 to form the U-shaped radiating unit 30.
The feed unit 50 is configured to connect to a signal feed point (not shown) of a circuit board of the wireless communication device and provide signal to the radiating unit 30.
In this exemplary embodiment, the feed unit 50 includes a main section 51 and a branch section 53 extended from the main section 51. The main section 51 is substantially strip-shaped and includes a feed end 511 and a first overlapping end 513 positioned at two opposite ends of the main section 51, respectively. The feed end 511 is for feeding the signal. The first overlapping end 513 overlaps the radiating unit 30. The branch section 53 is substantially L-shaped and includes a first bent section 531 and a second bent section 533 connected perpendicularly to the first bent section 531. The first bent section 531 is extended from one side of the main section 51. The second bent section 533 is formed by perpendicularly bending one end of the first bent section 531 opposite to the main section 51, and then extending a distance along a direction parallel to the main section 51. A second overlapping end 535 is formed by one end of the second bent section 533 away from the first bent section 531.
The feed unit 50 is positioned on the radiating unit 30. The main section 51 and the second bent section 533 are perpendicularly overlapped on the first radiating section 31 and the second radiating section 33, respectively. Thus, the main section 51 forms a first signal feed path with the first radiating section 31, and the branch section 53 forms a second signal feed path and the second radiating section 32.
Referring to
In other exemplary embodiment, when a number of the radiating sections such as the first and second radiating sections 31, 32 of the radiating unit 30 is increased, a number of the branch sections 53 can be increased correspondingly to form the multiple signal feed paths.
It is believed that the exemplary embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the disclosure.
Number | Date | Country | Kind |
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102110826 A | Mar 2013 | TW | national |
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Number | Date | Country | |
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20140292583 A1 | Oct 2014 | US |