Mobile communication device and antenna structure of mobile communication device

Abstract

The invention discloses a mobile communication device, comprising an antenna structure, wherein the antenna structure is provided with a grounding element and an antenna element. The antenna element comprises an antenna grounding surface, a radiation part and a short-circuit radiation part, wherein the antenna grounding surface is electrically connected with the grounding element. The radiation part comprises a signal feeder point, a first radiation branch path and a second radiation branch path. The first radiation branch path and the second radiation branch path are connected with the signal feeder point; the opening ends of the first radiation branch path and the second radiation branch path extend in the same direction. The first end of the short-circuit radiation part is in electric short circuit to the antenna grounding surface, and the second end of the short-circuit radiation part is an opening end; a coupling distance exists between a special section of the short-circuit radiation part, close to the first end and the radiation part; the short-circuit radiation part is coupled and excited by the radiation part by the coupling distance to generate at least one resonance mode so as to increase the operation bandwidth of the antenna.

Description

technical field [0001] The invention relates to a mobile communication device and its antenna structure, in particular to a mobile communication device whose built-in antenna has shielding metal walls and multi-frequency operating frequency bands. Background technique [0002] With the rapid development of wireless communication technology, it has prompted the birth of Long Term Evolution (LTE, Long Term Evolution) mobile communication technology, which means that mobile communication device antennas will require lower operating frequencies and wider bandwidths. It includes about 704-960 MHz and 1710-2690 MHz to cover the tri-band operation of LTE700 / 2300 / 2500 and the five-band operation of WWAN (Wireless Wide Area Network). While portable communication devices demand thin, small and multi-frequency operation, the space for accommodating antennas is relatively reduced. Therefore, the miniaturization technology of built-in multi-frequency antennas in communication devices is ...

AI Technical Summary

Problems solved by technology

[0003] Taiwan Patent Publication No. I327786 "An Electromagnetic Compatibility Built-in Multi-Frequency Serpentine Loop Antenna" discloses a method of achieving multi-frequency operation by means of a meandering loop radiator, and at the same time by integrating an antenna ground plane to achieve As a shielded metal wall concept, its operating frequency band can cover WWAN five-band operation, but its bandwidth still does not cover LTE / WWAN eight-band operation

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