A miniaturized multi-band mobile phone antenna

Abstract

The invention discloses a mini-type multi-band frequency mobile phone antenna and provides a planar monopole mobile phone antenna which is small in size, easy to manufacture, low in manufacturing cost and capable of meeting the multi-frequency requirement and meeting the requirement of the frequency bands of GSM850 / 900 / 1800 / 1900, UMTS and LTE2300 / 2500 at the same time. The antenna comprises a dielectric plate, an earth plate and a radiation metal sheet set, wherein the radiation metal sheet set is directly printed on the upper surface of the dielectric plate; an inverted-L-shaped radiation metal sheet directly carries out feed, one directly grounded bent radiation metal sheet is divided into two branches after being folded by several times, the multiple frequency bands can be covered with coupling between the directly fed inverted-L-shaped radiation metal sheet and the grounded radiation metal sheet set, the large bandwidth is achieved, the miniaturization and multiple frequencies of existing mobile phone antennas are achieved, and lumped elements and special substrate materials do not need to be loaded. The mini-type multi-band frequency mobile phone antenna is applicable to 2G / 3G / 4G mobile phones.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a miniaturized multi-band mobile phone antenna. Background technique [0002] The radio frequency signal power output by the radio transmitter is sent to the transmitting antenna through the feeder, and radiated by the antenna in the form of electromagnetic waves. After the electromagnetic wave reaches the receiving point, the receiving antenna receives the radiated electromagnetic wave and sends it to the radio receiver through the feeder. It can be seen that the antenna can be regarded as a sensor that realizes the mutual conversion between radio frequency signals and electromagnetic waves, and is an important radio device for transmitting and receiving electromagnetic waves. Without an antenna, there is no wireless communication. [0003] In recent years, the mobile communication terminal equipment—the mobile phone has become the fastest-growing communication prod...

AI Technical Summary

Problems solved by technology

With the increasing popularity of mobile phones, mobile phones have transformed from pure communication products to consumer electronics products due to the increase in functions. The motivation of many consumers to buy mobile phones is mainly attracted by their functions and designs. , may cause changes or reduce the performance of wireless communication, so it increases the difficulty of designing antennas

[0004]The ever-shrinking mobile phone antenna size means that the height and space of the antenna are compressed, and an efficient antenna must have sufficient height and space to expand the frequency band and efficiency. Although the design trend of the antenna is getting smaller and smaller, the size of the antenna itself still has its physical limitations. If the volume of the antenna is below the standard point, as the volume gradually shrinks, its reception effect It will also become weaker and weaker. Therefore, the miniaturization and multi-frequency design of the antenna is a hot and difficult point in the research of mobile phone antennas today.

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