Electronic device and antenna module thereof

An antenna module in provided. The antenna module includes a metal housing, a radiator and a feed conductor. The metal housing includes a housing surface and a through hole. The radiator surrounds the metal housing. The feed conductor connects the radiator to an inner circuit inside the metal housing via the through hole.

CROSS REFERENCE TO RELATED APPLICATIONS

This Application claims priority of Taiwan Patent Application No. 100145515, filed on Dec. 9, 2011, the entirety of which is incorporated by reference herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an antenna module, and in particular relates to an antenna module with improved transmission.

2. Description of the Related Art

Conventionally, a planar inverted F antenna (PIFA) is widely utilized in various electronic devices, particularly portable electronic devices such as cell phones or tablet personal computers. However, with increased transmission requirement, portable electronic device need to transmit signals of GSM850/900/1800/1900/UMTS standards, wherein GSM means Global System for Mobile Communications and UMTS means Universal Mobil Telecommunications System.

A conventional planar inverted F antenna (PIFA) cannot satisfy more exacting transmission requirements.

BRIEF SUMMARY OF THE INVENTION

An antenna module in provided. The antenna module includes a metal housing, a radiator and a feed conductor. The metal housing includes a housing surface and a through hole. The radiator surrounds the metal housing. The feed conductor connects the radiator to an inner circuit inside the metal housing via the through hole.

The embodiment of the invention also provides an electronic device including a device housing, a control interface, a circuit board, and the antenna module mentioned above. The control interface is disposed on the device housing. The circuit board is disposed in the device housing. The antenna module is disposed in the device housing and located on the circuit board.

The embodiment of the invention provides an antenna module with a simple structure, quasi-isotropic radiation pattern, increased gain in a predetermined direction, and an improved traveling wave radiating mechanism.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1shows an antenna module1of an embodiment of the invention, including a metal housing10, a radiator20and a feed conductor30. The metal housing10includes a housing surface15and a through hole16. The radiator20surrounds the metal housing10. The feed conductor30connects an inner circuit40inside the metal housing10to the radiator20via the through hole16.

The radiator20includes a first section21, a second section22, a third section23, a fourth section24and the fifth section25. The first section21is connected to an end of the second section22. The third section23is connected to the other end of the second section22. The second section22is perpendicular to the first section21, and is perpendicular to the third section23. The first section21is parallel to the third section23. The fourth section24is connected to an end of the third section23, and the fourth section is perpendicular to the third section23. An end of the fifth section25is connected to the second section22. The other end of the fifth section25is connected to the fourth section24. The fifth section25is located between the third section23and the metal housing10.

The feed conductor30is connected to an end of the first section21, and the second section22is connected to the other end of the first section21.

The first section21, the second section22and the third section23form a U-shaped structure.

The first section21and the second section22extend along a housing surface15of the metal housing10. The first section21and the second section22are kept a distance away from the housing surface15of the metal housing10.

The housing surface15includes a first side11and a second side12. The first side11is perpendicular to the second side12. The first side11corresponds to the first section21. The second side12corresponds to the second section22.

At least a portion of the fourth section24corresponds to the housing surface15of the metal housing10.

With reference toFIG. 3, in an embodiment of the invention, the antenna module1further comprises a ground conductor50. The ground conductor50connects the housing surface15to the radiator20.

FIG. 2shows an electronic device100of an embodiment of the invention, including a device housing110, a control interface120, a circuit board130and the antenna module1mentioned above. The control interface120is disposed on the device housing110. The circuit board130is disposed in the device housing110, and is electrically connected thereto. The antenna module1is disposed in the device housing110, and is located on the circuit board130. The electronic device100can be a cell phone, tablet personal computer or other portable electronic devices. The control interface120can be a touch panel or other control interfaces.

The embodiment of the invention provides an antenna module with a simple structure, quasi-isotropic radiation pattern, increased gain in a predetermined direction, and an improved traveling wave radiating mechanism.

In the embodiment of the invention, the feed point of the feed conductor connected to the radiator can be changed. The ground point of the ground conductor connected to the radiator can be changed. The embodiment disclosed above does not restrict the invention.