Small 3G antenna used for tablet personal computer

Abstract

The invention discloses a small 3G antenna used for a tablet personal computer. The antenna comprises a high-frequency cable, a low-frequency cable, a feeding point and a ground feedback point, wherein the high-frequency cable, the low-frequency cable, the feeding point and the ground feedback point are arranged on a circuit board, a first partition groove is formed between the high-frequency cable and the low-frequency cable, and a second partition groove is formed between the feeding point and the ground feedback point. The feeding point and the ground feedback point are arranged on a board edge of the circuit board in parallel, and the feeding point is located outside the ground feedback point. The low-frequency cable extends to the board edge on another side of the circuit board from the feeding point along the portion below a second open groove and then detours towards the high-frequency cable, and the first partition groove is located between a tip of the high-frequency cable and a tip of the low-frequency cable. The high-frequency cable extends upward and then leftward along the board edge on one side of the circuit board from the feeding point. The antenna is small and exquisite in size and good in performance, no spurious response needs to be increased to increase the bandwidth, and the problem that low-frequency radiant power and receiving sensitivity are lowered due to the fact that the bandwidth is increased by increasing the spurious response can be effectively solved.

Description

technical field [0001] The invention relates to the field of antenna design, in particular to a small 3G antenna used by a tablet computer. Background technique [0002] At present, with the rapid development of wireless communication technology, people's life rhythm is getting faster and faster, and the demand for entertainment, surfing the Internet and learning is also getting higher and higher. The upsurge of tablet computers represented by Apple ipad is quickly sweeping the world and grabbing the market. Statistics show that in the past 2011, the sales of tablet PCs in the European market increased by 910% in the first quarter. It is estimated that the global sales volume will exceed 70 million units in 2012 and reach 110 million units in 2014. These data show that people agree with the tablet computer, which has excellent mobility and portability, is smaller than a notebook, has a stylish appearance, rich operating applications, and has the basic functions of a notebook...

AI Technical Summary

Problems solved by technology

The antenna space required by traditional 3G antennas for tablet computers must be above 60mm*12mm*3mm (L*W*H), and parasitic units need to be added to increase bandwidth. If no parasitic units are added, there is only one resonance at high frequencies, and low frequencies radiated power and reduced sensitivity of the receiver

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