CN-116759809-B - Mobile terminal with multi-resonant mode antenna

CN116759809BCN 116759809 BCN116759809 BCN 116759809BCN-116759809-B

Abstract

The invention discloses a mobile terminal with a multi-resonant mode antenna, which comprises a bottom shell, wherein an antenna structure is arranged at the periphery in the bottom shell, the antenna structure comprises a multi-section radiator, and at least two sections in the multi-section radiator are connected in a bending way so as to enable the multi-section radiator to work in different resonant frequency bands respectively; for the mobile terminal, the antenna structure is arranged on the bottom shell of the mobile terminal, and a sufficient space is reserved between the bottom shell and other functional structural members of the mobile terminal, so that the multi-section radiator is bent and arranged in a wiring mode, and the antenna structure has a plurality of resonant frequency bands, a multi-mode resonant effect and multi-directional radiation; in addition, the antenna structure is arranged on the outer periphery of the bottom shell, so that the radiation capability of the antenna structure is effectively improved.

Inventors

HU GAOYANG
SUN KAI
HUANG JIAN
LUO XIAOWU
XU ZHEN
XU AILIANG
CAI JUNWEN

Assignees

东莞华贝电子科技有限公司

Dates

Publication Date: 20260512
Application Date: 20230725

Claims (5)

1. The mobile terminal with the multi-resonant mode antenna is characterized by comprising a bottom shell, wherein an antenna structure is arranged at the periphery in the bottom shell, the antenna structure comprises a plurality of sections of radiators, and at least two sections of the radiators are bent and connected so that the plurality of sections of radiators respectively work in different resonant frequency bands; The radiator comprises a plurality of sections, a plurality of sections and a plurality of sections, wherein the plurality of sections comprise a first branch section, a second branch section and a third branch section, the length of the second branch section is larger than that of the first branch section, one end of the third branch section is connected with the second branch section through a first bending part, the other end of the third branch section is connected with the first branch section through a second bending part, and a notch is formed between the first branch section and the second branch section; The first branch section provides a high-frequency resonance section for the antenna structure, the second branch section provides a low-frequency resonance section for the antenna structure, and the first bending part provides a first intermediate-frequency resonance section for the antenna structure; the multistage radiator further comprises a fourth branch section, the fourth branch section is arranged on the outer side of the third branch section at parallel intervals, so that the fourth branch section is in parasitic coupling with the third branch section, and the fourth branch section provides a second intermediate frequency resonance section for the antenna structure.
2. The mobile terminal with a multi-resonant mode antenna of claim 1, wherein the bottom shell comprises a bottom wall and a side wall with an integrated structure, the side wall serving as a center frame of the mobile terminal.
3. The mobile terminal with a multi-resonant mode antenna of claim 1, wherein the outer housing is integrally formed with the inner housing.
4. The mobile terminal with a multi-resonant mode antenna of claim 1, wherein the antenna structure is injection molded onto the bottom case.
5. The mobile terminal with the multi-resonant mode antenna according to claim 1, wherein the antenna structure further comprises a first connection point and a second connection point, wherein the first connection point and the second connection point are arranged on the side wall of any one or both of the first branch section, the second branch section and the third branch section, the first connection point is used for being electrically connected with a ground signal end of a main board on the mobile terminal, the second connection point is used for being electrically connected with an antenna matching circuit arranged on the main board, and the antenna structure further comprises a third connection point arranged on the fourth branch section and used for being electrically connected with a ground signal end of the main board.

Description

Mobile terminal with multi-resonant mode antenna Technical Field The invention relates to the technical field of antenna structure arrangement, in particular to a mobile terminal with a multi-resonant mode antenna. Background Wireless mobile terminals need to communicate wirelessly by means of antennas, and therefore antennas have a significant role in wireless mobile terminal devices. For mobile terminals represented by mobile phones, ultra-thin model is favored by users. However, the mobile phone is a high-precision structural member, the thinner the body, the more stringent the space installation position requirement for each structural member, and at the same time, in order to save the installation space as much as possible, each structural member constituting the mobile phone is developed toward miniaturization, for example, antennas including FPC antennas, PCB antennas, MDA antennas (in-mold injection antennas), and the like. For the current middle-high-end mobile phones, an antenna scheme of a pure plastic shell and an FPC is rarely adopted, and a metal frame or MDA is mostly used as an antenna. Compared with the antenna structure of the metal frame, the mobile phone using the MDA antenna not only ensures the structural strength of the whole machine, but also enables the machine body to have metal texture, and simultaneously solves the problem that the appearance of the whole machine is broken due to the antenna. For the existing MDA antenna scheme, side elevation metal positioned at the periphery of a middle frame of the whole machine is adopted as an antenna radiator, the antenna radiator is directly connected with the middle frame of the whole machine, and an alloy bracket (used for supporting a main board and an LCD) connected with the middle frame is positioned between the main board and the LCD, so that the antenna radiator cannot be arranged in multiple directions on the middle frame due to the limitation of space positions. Therefore, MDA antennas have the disadvantage that the resonant mode is often single, and the antenna does not have the multi-mode characteristic of FPC antenna wiring. Therefore, in order to make the MDA antenna have multi-mode characteristics, the conventional method is to match with the MDA antenna, and meanwhile, detach the bracket on the side plane of the battery of the whole machine to make an LDS (laser etching antenna), so that the resonant frequency bandwidth of the antenna can be satisfied. However, the two problems are derived simultaneously, namely, firstly, the height of the antenna is limited, the antenna cannot be arranged on the outermost structural member, the antenna is required to be arranged on a support below the battery cover, the radiation capacity is poor, secondly, the continuity of combination of the LDS and the MDA wires is poor, a plurality of elastic sheets are required to be switched on an upper frame of the LDS, most of the LDS can only be used as an antenna parasitic unit, and the bandwidth is limited. In summary, an antenna configuration structure of a mobile terminal is improved. Disclosure of Invention The invention aims to provide a mobile terminal with a multi-resonant mode antenna, wherein the communication antenna has a multi-mode resonant effect and better radiation capacity. In order to achieve the above-mentioned objective, the present invention discloses a mobile terminal with a multi-resonant mode antenna, which includes a bottom shell, wherein an antenna structure is disposed at the periphery in the bottom shell, the antenna structure includes a plurality of sections of radiators, and at least two sections of the plurality of sections of radiators are connected in a bending manner, so that the plurality of sections of radiators respectively work in different resonant frequency bands. Preferably, the bottom case includes a bottom wall and a side wall having an integrated structure, the side wall serving as a middle frame of the mobile terminal. Preferably, the bottom shell comprises a metallized inner shell and a plastic outer shell sleeved on the inner shell, at least one side of the inner shell is provided with an avoidance notch, and the antenna structure is arranged on the inner wall of the outer shell opposite to the avoidance notch. Preferably, the outer shell and the inner shell are integrally formed. Preferably, the antenna structure is injection molded on the bottom case. Preferably, the multistage the radiator includes first branch section, second branch section and third branch section, the length of second branch section is greater than the length of first branch section, the one end of third branch section pass through first bending portion with the second branch section is connected, the other end of third branch section pass through second bending portion with first branch section is connected, first branch section with have the notch between the second branch section. Preferably, the first branch section provides