An antenna suitable for a handheld mobile communication terminal with a metal frame

Abstract

The invention provides an antenna suitable for a handheld mobile communication terminal with a metal outer frame. The antenna comprises a PCB (Printed Circuit Board), a metal outer frame connected with the edge of the PCB and an antenna part, wherein the metal outer frame is fractured in the middle of the bottom edge of a clearance area arranged on the PCB to form a gap; the antenna part comprises a feeding part and a radiation sheet part; one end of the feeding part is connected with the metal outer frame, and the other end is connected with a signal end of a feed source; the radiation sheet part comprises a first radiation sheet and a second radiation sheet; the first radiation sheet is connected with one end of the metal outer frame and high frequency resonance frequency is generated; and the second radiation sheet is connected with the other end of the metal outer frame and low frequency resonance frequency is generated. The antenna suitable for the handheld mobile communication terminal with the metal outer frame performs operation by utilizing the metal outer frame acting as a new antenna mode of a radiator; the influence, on the performance of the antenna, brought by the metal outer frame is utilized to the maximum limit,and the performance of equipment is improved, so that the requirement of a user is satisfied. Besides, the gap is formed in the middle of the bottom edge of the clearance area, so that the effect of attractive appearance is achieved.

Description

technical field [0001] The invention relates to the technical field of mobile phone antenna design, in particular to an antenna suitable for a handheld mobile communication terminal with a metal frame. Background technique [0002] In the existing hand-held communication terminals, miniaturization and multi-band antennas have become the mainstream development direction. Among the existing antenna forms today, including multi-frequency monopole antenna (monopole antenna), single loop or dual loop antenna (single loop and dual loop antenna), inverted folded antenna (IFA), planar inverted folded antenna (PIFA), etc. etc. The above antenna forms have been applied to different types of handheld communication terminals according to specific environments. [0003] Commonly used wireless communication systems for mobile terminals mainly include GSM850 / 900, DCS, PCS, and UMTS. Their main operating frequency ranges are distributed in 0.824GHz-0.894GHz / 0.88GHz-0.96GHz, 1.71GHz-2.17GHz...

AI Technical Summary

Problems solved by technology

The outstanding problems are reflected in the narrowing of the antenna bandwidth and performance degradation, making it difficult to meet the relevant requirements of operators

The narrowing of the antenna bandwidth makes the equipment unable to meet the above frequency bands

like figure 1 As shown, the conventional antenna of a handheld communication terminal with a metal frame cannot meet the coverage requirements of a single frequency band of GSM850 or GSM900. Usually, slots are opened on the metal frame and matched with the antenna to achieve the required frequency band coverage. However, the existing In the technology, the gap is generally set on the side of the mobile phone, which has no aesthetic effect

However, the form of setting the gap in the middle of the bottom edge of the metal frame has no matching antenna design, which has become a difficult problem in the mobile phone antenna design process.

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