Multiband all-metal frame adjustable mobile phone antenna

Abstract

The invention relates to a multiband all-metal frame adjustable mobile phone antenna, including an all-metal frame and a circuit board. A gap is formed between the all-metal frame and the circuit board, and electromagnetic waves radiates through the gap; the left lower side of the circuit board is provided with an L-shaped cutting groove, a feed port and an adjustable element are arranged in the position of the L-shaped cutting groove, one end of the feed port is connected with the circuit board, the other end is connected with the adjustable element in series, and required low-frequency and high-frequency bands are obtained by switching of two values of the adjustable element; an outer side of the left lower side of the circuit board is provided with an L-shaped metal block whose inner side is matched with a corner of the circuit board and outer side is adjacent to a left corner of the all-metal frame; a short circuit point is arranged between the left side of the all-metal frame and the circuit board; the right side of the all-metal frame and the circuit board are connected through an adjusting element; and required high-frequency bandwidth is obtained by adjustment of the value of the adjusting element. The antenna has a large coverage area of working frequency bands and good working performance, is easy to realize, and is suitable for a mobile communication terminal.

Description

technical field [0001] The invention relates to an adjustable mobile phone antenna with a multi-band all-metal frame. Background technique [0002] With the development of mobile communication, more and more frequency bands are applied to mobile phones, which requires that mobile phones have good compatibility and can work on multiple frequency bands at the same time. This puts forward higher requirements for the built-in antenna of the mobile phone, not only to meet the requirements of miniaturization, but also to meet the requirements of working in multiple frequency bands at the same time. [0003] With the extensive construction of 4G networks and the development and maturity of LTE standards, today's smartphone antennas must not only meet the needs of traditional 2G, gradually popularized 3G and rapidly developing 4G, but also require mobile phone antennas to cover more frequency bands, such as Bluetooth, WLAN Wait. It is difficult for traditional narrowband antennas ...

AI Technical Summary

Problems solved by technology

It is difficult for traditional narrowband antennas to achieve wide frequency bands while being miniaturized, and it is difficult to meet the requirements of communication systems. How to design multi-band antennas that meet the needs of various communication systems has become a hot research topic today.

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