Antenna device of mobile terminal surrounding feed pin

Abstract

The invention provides an antenna device of a mobile terminal surrounding a feed pin. The antenna device comprises a main board of the mobile terminal, an antenna feed pin and an antenna radiation film, and the antenna radiation film is provided with at least one long node surrounding the feed pin or a contact area of the feed pin. The antenna device provided by the invention has a higher compatibility in high and low frequency bands than a normal antenna, in particular in a situation that the normal antenna has a too high secondary resonance frequency due to a low-frequency node, without additionally increasing the antenna height, area and clearance or providing an additional large inductor connected in series. The antenna device of the mobile terminal surrounding the feed pin can be widely applied to a GSM (global system for mobile communications), a CDMA (code division multiple access) multi-frequency mobile terminal antenna and a WIFI (wireless fidelity), BT (Bluetooth) and GPS (global positioning system) three-in-one antenna.

Description

technical field [0001] The invention relates to a mobile terminal antenna device surrounding a feeder pin or a feeder pin contact area. Background technique [0002] Now, with the miniaturization and multi-frequency of mobile terminals, severe challenges are posed to the miniaturization of antennas and multiple operating frequency bands. For example, the three-in-one antenna of GPS, BT and WIFI needs to work in two frequency bands of 1.57GHz and 2.4GHz. If the common dual-frequency antenna technology is used, such as the "G" type antenna, which uses double-branch wiring to generate dual-frequency resonance, even if the coupling strength of the low-frequency branch and the high-frequency branch is increased, it is difficult to make the 1.57GHz branch The second resonance frequency falls near 2.4GHz, which will cause the 1.57GHz branch to interfere with the resonance of the 2.4GHz branch, resulting in a smaller bandwidth at 2.4GHz. [0003] In order to solve this technical p...

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Problems solved by technology

[0008] The above-mentioned existing technologies have some shortcomings. Increasing the headroom of the antenna obviously does not meet the requirements of the mobile terminal for the antenna. To enhance the high and low frequency coupling of the G-type antenna may be to enhance the coupling of the high and low frequency branches. The gap between the two may be small enough to process Within the error range, mass production cannot be realized. In addition, in order to couple the second resonance of the long branch of the G-shaped antenna with the short branch, the end of the long branch generally needs to be folded back. s position

The scheme of series large inductance will introduce inductance loss, and will reduce the bandwidth of low frequency

The purpose of the above various antennas is to obtain broadband effects at multiple frequencies, thereby improving the utilization rate of bandwidth, but the structures of the above-mentioned devices are relatively complicated, and the antenna structure formed around the contact area of ​​the feeder foot as in the present invention and the antenna length adjustment are not adopted. s method

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