Mobile communication device and antenna thereof

Abstract

The invention discloses a mobile communication device, which is provided with a ground plane and an antenna, wherein the antenna is positioned on a dielectric substrate which is adjacent to the ground, and comprises a radiation part, a feed-in part and a short circuit unit; one end of the feed-in part is connected to a signal source, and the other end of the feed-in part is electrically connected to the radiation part; the feed-in part is also provided with a capacitive element or an open section; and the short circuit unit provides two different short circuit paths which electrically connect the radiation part to the ground. The mobile communication device and the antenna thereof operate with bandwidth ranges covering LTE700 / GSM850 / 900(704-960MHz) and GSM1800 / 1900 / UMTS / LTE2300 / 2500(1710-2690MHz) respectively, and the bandwidth ranges covers all the current mobile communication bands; and simultaneously, the size of the antenna is small, so that the antenna is suitable for thin mobile communication devices.

Description

technical field [0001] The invention relates to a mobile communication device and its antenna, in particular to a mobile communication device whose built-in antenna has two broadband operating frequency bands. Background technique [0002] Based on the needs of mobile communication users for speed and convenience, the mobile communication technology "Long Term Evolution" (LTE for short) with ultra-high transmission speed and ultra-large transmission range was born. Therefore, in order to develop a miniaturized mobile communication device with LTE technology and compatible with known GSM / UMTS technology, a miniaturized broadband antenna whose operating bandwidth can cover the bandwidth required by LTE / GSM / UMTS has become an important development. direction. Looking at the operating bandwidth of traditional mobile communication device antennas, most of them cannot meet the needs of LTE / GSM / UMTS at the same time. In the antenna design of communication devices, the antenna mec...

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Problems solved by technology

Looking at the operating bandwidth of traditional mobile communication device antennas, most of them cannot meet the needs of LTE / GSM / UMTS at the same time. In the antenna design of communication devices, the antenna mechanism is to use dual resonance paths to achieve dual-frequency operation. However, the use of such dual resonance paths or multiple resonance paths limits the size reduction of the antenna and the effect of improving the impedance bandwidth is limited, which is not easy. To meet the requirements of reducing the size of multi-frequency antennas of existing mobile communication devices, and its operating frequency band can only cover dual-frequency operation, which cannot meet the required eight-frequency operation of LTE / GSM / UMTS. Therefore, how to use the limited antenna design space Under these conditions, the design of an eight-band antenna that meets the needs of current mobile communication devices is a major challenge.

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