A Miniaturized Broadband Slot Mobile Phone Antenna

Abstract

The invention discloses a mini broadband gap type mobile phone antenna, and solves the problems that a present gap type mobile phone antenna is narrow in the low-frequency bandwidth, complex in structure and large in size. The antenna is printed on a mobile phone circuit board, and comprises three layers, namely a dielectric plate, the ground at the bottom surface of the dielectric plate and a feeder line at the top surface of the dielectric plate. Two rectangular gaps, namely a first gap and a second gap, are formed in the ground, openings of the two gaps are positioned in two opposite sides respectively, the first gaps serves as a main gap, and the second gap is used to excite more current to distribute near the first gap. The feeder line is composed of a rectangular microstrip line and a metal strip line of a bent shape, the metal strip line is connected with the rectangular microstrip line, and the projection of the metal strip line on the ground is placed in the first gap and is bent around the boundary of the first gap. The antenna can excite two resonance modes in the low frequency band, realizes broadband matching, and the -6dB bandwidth is 0.82-1.08GHz (260MHz). The antenna also has the advantages of being small in size, saving space of a mobile phone and being easy to realize, and is wide in engineering application prospects.

Description

technical field [0001] The invention relates to a mobile phone antenna, in particular to a miniaturized broadband slot type mobile phone antenna. Background technique [0002] Currently, mobile communication standards that have been applied globally include second generation (Second Generation, 2G), third generation (Third Generation, 3G) and fourth generation mobile communication (Fourth Generation, 4G) standards. Mobile phone antennas require multi-frequency work, which can cover multiple working frequency bands of 2G, 3G, and 4G, and support functions such as mobile Internet access and navigation. The thinner and lighter appearance of the mobile phone requires the antenna to be small in size and light in weight, and the complexity of the circuit design of the mobile phone also requires the antenna to be compact in size and miniaturized. Therefore, miniaturization and multi-frequency are important indicators for mobile phone antenna design. [0003] Currently used mobile...

AI Technical Summary

Problems solved by technology

The disadvantage of this antenna is that the volume of the antenna is large, the area of ​​the slot is 40mm×9mm, and the 6mm high metal strip welded vertically to the circuit board increases the height of the antenna

[0006] The antenna structure of the above two prior art is complicated, and the area or height of the antenna is increased to obtain a wide frequency band, which is not conducive to the miniaturization of the antenna

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