Antenna device and dual-frequency antenna thereof

Abstract

The invention relates to an antenna device, which is suitable for being installed on an electronic device. The antenna device comprises a base plate and a dual-frequency antenna, wherein the base plate comprises a surface, the dual-frequency antenna comprises a feed-in segment, a first radiation arm, a second radiation arm and a third radiation arm, the feed-in segment is arranged on the surface and is used for a signal to feed in, the first radiation arm is arranged on the surface and extends from one end of the feed-in segment and in parallel to the feed-in segment, the second radiation arm is arranged on the surface and extends from the other end of the feed-in segment and in parallel with the feed-in segment, the third radiation arm is arranged on the surface and is parallel and adjacent to the first radiation arm, the feed-in segment is arranged between the third radiation arm and the second radiation arm, and a grounding segment is arranged on the surface and connected with the third radiation arm.

Description

technical field [0001] The invention relates to an antenna device, in particular to an antenna device with a dual-frequency antenna. Background technique [0002] In recent years, due to the popularity of the Internet, global broadband Internet access has flourished. Among them, the frequency bands are 824-960MHz and 1710-2170MHz, which can be used for communication between cities or even between countries. , referred to as WWAN) has been widely used, and the notebook computer can be adapted to the wireless wide area network by installing the wireless wide area network antenna device in the notebook computer. [0003] However, monopole antennas, helical antennas, and loop antennas commonly used in wireless communications have the disadvantage that they cannot be lowered in height, making it difficult to install them in notebook computers. Therefore, refer to figure 1 As shown, a planar inverted-F (Planar inverted-F) antenna 9 suitable for being installed in a notebook compu...

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Problems solved by technology

[0003] However, the disadvantage of monopole antennas, helical antennas and loop antennas commonly used in wireless communication is that the height cannot be reduced, so that it is difficult to install them in notebook computers. Therefore, refer to figure 1 As shown, a planar inverted-F (Planar inverted-F) antenna 9 suitable for being installed in a notebook computer has been proposed at present, but the structure of this inverted-F antenna 9 is getting smaller and smaller as the design space Under the requirements, there are shortcomings of narrow frequency band, low efficiency and directional radiation pattern, so it is worthy of further research and improvement

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