Metal frame mobile phone antenna and metal frame mobile phone
By designing the first and second fractures on the metal-framed mobile phone to form an enclosing side frame and a radiation side frame, and combining the connection end of the filter module with the grounding of the filter module on the mobile phone motherboard, the problem of decreased signal radiation performance of the metal-framed mobile phone is solved, multi-band performance and high-efficiency antenna design are achieved, electromagnetic interference is reduced, and support is provided for ultra-high frequency, L5, and medium and high frequency coverage.
Patent Information
- Application Number
- CN202422656173.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In the prior art, the built-in antenna of a metal-framed mobile phone has a reduced signal radiation performance due to the shielding effect of the metal frame, and the addition of gaps easily causes signal interference, affecting communication quality.
By setting the first and second breaks on the metal frame, it is divided into an enclosing side frame and a radiating side frame, and the first feed end, second feed end and third feed end are designed to form three antenna loops. The filter module connection end is combined with the filter module grounding on the mobile phone motherboard to achieve multi-band performance, and a 33PF capacitor is used to filter noise to improve antenna efficiency.
Without adding any gaps, the multi-antenna and multi-band performance of metal-framed mobile phones is achieved, the radiation intensity and efficiency of the antenna are improved, electromagnetic interference is reduced, and multiple frequency bands such as ultra-high frequency, L5, and medium and high frequency are supported, promoting the lightweight design of mobile phones.
Smart Images
Figure CN223414278U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of antennas, and in particular relates to a metal-frame mobile phone antenna and a metal-frame mobile phone. Background Art
[0002] Modern mobile phone terminal antennas are mostly built-in. For mobile phones with metal frames, the industry's common method is to build an antenna made of FPC or LDS material on an antenna bracket and then place it inside the phone to radiate the signal. However, the metal frame has the effect of shielding the signal, and the metal frame will hinder the outward radiation of the mobile phone's built-in antenna, resulting in a sharp decline in the performance of the mobile phone's built-in antenna. Therefore, in existing designs, a portion of the metal middle frame is cut off to form a breakpoint to improve signal reception capability and stability. However, too many breaks can easily become potential signal interference points, increase interference between signals, and affect communication quality. Therefore, how to achieve multiple antennas on a metal frame while minimizing the number of breakpoints is of great design significance to the development of metal-framed mobile phones. Utility Model Content
[0003] The purpose of this utility model is to overcome the shortcomings and deficiencies in the prior art and provide a metal frame mobile phone antenna, which realizes the common branch antenna design on the metal frame without adding fractures, realizes multi-antenna multi-band performance, and uses a filtering module to filter high frequencies to improve antenna efficiency.
[0004] The utility model is realized through the following technical solutions:
[0005] A metal-frame mobile phone antenna comprises a metal frame, a first feed end, a second feed end, a third feed end, and a filter module connection end; the metal frame is provided with a first slit and a second slit, and the metal frame is separated by the first slit and the second slit to form an enclosing side frame and a radiating side frame; the first feed end, the second feed end, and the third feed end are electrically connected to the radiating side frame in sequence; the filter module connection end is used to connect to a ground end via a filter module on a mobile phone mainboard, and the filter module connection end is electrically connected to the radiating side frame.
[0006] The utility model provides a mobile phone antenna with a metal frame. The metal frame is separated by a first fracture and a second fracture to form an enclosing side frame and a radiating side frame. The radiating side frame can form three antenna loops with a first feeding end, a second feeding end and a third feeding point respectively. The common branch antenna design on the metal frame is realized without adding fractures, and multi-antenna multi-band performance is achieved. The filter module connection end is connected to the filter module on the mobile phone mainboard and grounded to filter noise to improve antenna efficiency.
[0007] Furthermore, the length of the radiating side frame between the first feed end and the filter module connection end is 1 / 4-1 / 2 of the operating frequency band of the first feed end; the length of the radiating side frame between the second feed end and the filter module connection end is 1 / 4-1 / 2 of the operating frequency band of the second feed end; and the length of the radiating side frame between the third feed end and the filter module connection end is 1 / 4-1 / 2 of the operating frequency band of the third feed end. The length of the radiating side frame of the common branch node is limited based on the matching frequencies of the first feed end, the second feed end, and the third feed end, and the relative positions of the first feed end, the second feed end, and the third feed end can be determined based on this.
[0008] Furthermore, the first feeder operates in the UHB band, the second feeder operates in the L5 band, and the third feeder operates in the MHB band. The co-branched metal frame design enables coverage of multiple frequency bands, including UHF, L5, and mid-high frequencies.
[0009] Further, the connection end of the filter module is located between the first feed end and the second feed end; or, the connection end of the filter module is located between the second feed end and the third feed end.
[0010] Furthermore, the radiation side frame is in a straight line or arc shape. According to the operating frequency bands of the first feeding end, the second feeding end and the third feeding end, the radiation side frame portion for co-branch radiation can be designed at the side or top corner of the metal frame.
[0011] The present utility model also provides a metal-frame mobile phone, comprising a mobile phone mainboard and the above-mentioned metal-frame mobile phone antenna; the mobile phone mainboard is arranged in the metal frame, and a first feed matching circuit, a second feed matching circuit, a third feed matching circuit, a filter module and a grounding terminal are arranged on the mobile phone mainboard; the first feed terminal of the metal-frame mobile phone antenna is electrically connected to the first feed matching circuit, the second feed terminal is electrically connected to the second feed matching circuit, and the third feed terminal is electrically connected to the third feed matching circuit; the filter module is arranged on the mobile phone mainboard, the filter module connection end is electrically connected to the filter module, and the filter module is electrically connected to the grounding terminal.
[0012] In the metal-frame mobile phone provided by the present invention, the metal frame is separated by the first slit and the second slit to form an enclosing side frame and a radiating side frame. The radiating side frame is used for common branch antenna radiation and is connected with the first feeding end, the second feeding end, and the third feeding end to form an antenna loop for three frequency bands. The multi-band multi-antenna design requirements are achieved without increasing the number of slits, the number of antennas in the mobile phone is reduced, and it is conducive to the lightweight design of the mobile phone.
[0013] Furthermore, the filter module is a 33PF capacitor. The 33PF capacitor is selected for filtering to reduce electromagnetic interference.
[0014] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural diagram of the metal frame mobile phone antenna of Example 1.
[0016] Figure 2 This is an S11 parameter diagram of the first feeding end 2UHB frequency band and the second feeding end 3L5 frequency band in Example 1.
[0017] Figure 3 1 is a diagram of the antenna efficiency of the first feeding end 2 in the UHB band of Example 1.
[0018] Figure 4 1 is an antenna efficiency diagram of the second feeding end 3 in the L5 frequency band of Example 1.
[0019] Figure 5 1 is a diagram of the S11 parameters of the third feeding terminal 4 in the MHB band of the first embodiment.
[0020] Figure 6 1 is a diagram of the antenna efficiency of the third feeding terminal 4 in the MHB band of the first embodiment.
[0021] Figure 7 It is a structural diagram of the metal frame mobile phone of Example 2. DETAILED DESCRIPTION
[0022] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions of the embodiments of the present invention, rather than all structures.
[0023] Furthermore, the terms "first," "second," "third," etc., in the specification and claims are used solely for descriptive purposes to distinguish between identical technical features. They are not to be construed as indicating or implying relative importance, or as implicitly specifying the number of technical features, nor do they necessarily describe a sequential or chronological order. The terms are interchangeable where appropriate. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of those features.
[0024] Similarly, the terms "fixed" and "connected" used in the specification and claims should not be construed as limited to direct connections. Thus, the expression "device A is connected to device B" should not be limited to devices or systems in which device A is directly connected to device B. Rather, it means that a path exists between device A and device B, which may include other devices or tools.
[0025] Example 1
[0026] This embodiment provides a metal frame mobile phone antenna. Figure 1 This is a schematic diagram of the structure of a metal frame mobile phone antenna. Figure 1 The metal frame mobile phone antenna includes a metal frame 1, a first feed end 2, a second feed end 3, a third feed end 4 and a filter module connection end 5; a first break 13 and a second break 14 are provided on the metal frame 1, and the metal frame 1 is separated by the first break 13 and the second break 14 to form an enclosing side frame 11 and a radiation side frame 12; the first feed end 2, the second feed end 3 and the third feed end 4 are electrically connected to the radiation side frame 12 in sequence; the filter module connection end 5 is used to connect to the ground end through the filter module 9 on the mobile phone motherboard 10, and the filter module 9 is electrically connected to the radiation side frame 12.
[0027] In the metal frame mobile phone antenna provided in this embodiment, the first break 13 and the second break 14 are used to improve the radiation intensity. The metal frame 1 is separated by the first break 13 and the second break 14 to form an enclosing side frame 11 and a radiating side frame 12. The radiating side frame 12 can form three antenna loops with the first feeding end 2, the second feeding end 3 and the third feeding point respectively. The co-branch antenna design on the metal frame 1 is realized without adding breaks, achieving multi-antenna multi-band performance, and using the filter module 9 to filter high frequencies to improve antenna efficiency.
[0028] In this embodiment, the length of the radiating side frame 12 between the first feed terminal 2 and the filter module connection terminal 5 is 1 / 4 to 1 / 2 of the operating frequency band of the first feed terminal 2; the length of the radiating side frame 12 between the second feed terminal 3 and the filter module connection terminal 5 is 1 / 4 to 1 / 2 of the operating frequency band of the second feed terminal 3; and the length of the radiating side frame 12 between the third feed terminal 4 and the filter module connection terminal 5 is 1 / 4 to 1 / 2 of the operating frequency band of the third feed terminal 4. The length of the radiating side frame 12 of the common branch node is limited based on the matching frequencies of the first feed terminal 2, the second feed terminal 3, and the third feed terminal 4, and the relative positions of the first feed terminal 2, the second feed terminal 3, and the third feed terminal 4 can be determined based on this.
[0029] In this embodiment, the operating frequency of the first feed end 2 is the UHB band; the operating frequency band of the second feed end 3 is the L5 band; and the operating frequency band of the third feed end 4 is the MHB band. The design of the metal frame 1 with common branches can achieve coverage of multiple frequency bands including ultra-high frequency, L5, and medium-high frequency. That is, the first feed end 2, the radiation side frame 12, the filter module connection end 5, the filter module on the mobile phone motherboard 10, and the ground end form a first antenna loop with a resonant frequency band of the UHB band; the second feed end 3, the radiation side frame 12, the filter module connection end 5, the filter module on the mobile phone motherboard 10, and the ground end form a second antenna loop with a resonant frequency band of the L5 band; the third feed end 4, the radiation side frame 12, the filter module connection end 5, the filter module on the mobile phone motherboard 10, and the ground end form a third antenna loop with a resonant frequency band of the MHB band.
[0030] In this embodiment, the filter module connection terminal 5 is located between the first feed terminal 2 and the second feed terminal 3 ; alternatively, the filter module connection terminal 5 is located between the second feed terminal 3 and the third feed terminal 4 .
[0031] In this embodiment, the filter module connection terminal 5 is connected to the filter module 9, and the filter module 9 is a 33PF capacitor to reduce electromagnetic interference.
[0032] See also Figure 1 In this embodiment, the radiation side frame 12 is in a straight line or arc shape. According to the operating frequency bands of the first feed end 2, the second feed end 3, and the third feed end 4, the radiation side frame 12 portion for co-branch radiation can be designed at the side or top corner of the metal frame 1. In this embodiment, the optimal length of the radiation side frame 12 for co-branch radiation is obtained based on the wavelengths corresponding to the UHB band, the L5 band, and the MHB band. Therefore, the radiation side frame 12 is set at the top corner position, the first slit 13 is located on the side of the first feed end 2 away from the filter module 9, and the second slit 14 is located on the side of the third feed end 4 away from the filter module 9.
[0033] Specifically, the distance between the first break 13 and the first feeding terminal 2 is 1.4 mm, that is, the length of the radiation side frame 12 between the first break 13 and the first feeding terminal 2 is 1.4 mm; the distance between the first break 13 and the vertex 15 of the metal frame 1 close to the first feeding terminal 2 is 16.4 mm; the distance between the first feeding terminal 2 and the vertex 15 of the metal frame 1 close to the first feeding terminal 2 is 15 mm; the distance between the second feeding terminal 3 and the vertex 15 of the metal frame 1 close to the first feeding terminal 2 is 5.8 mm.
[0034] The distance between the second break 14 and the third feeding end 4 is 4 mm, that is, the length of the radiation side frame 12 between the second break 14 and the third feeding end 4 is 4 mm; the distance between the second break 14 and the filter module 9 is 19 mm, that is, the length of the radiation side frame 12 between the second break 14 and the filter module 9 is 19 mm; the distance between the second break 14 and the top corner 15 of the metal frame 1 close to the first break 13 is 30.7 mm.
[0035] In this embodiment, both the first slit 13 and the second slit 14 are filled with an insulator.
[0036] Figure 2 This is the S11 parameter diagram for the UHB band of the first feed end 2 and the L5 band of the second feed end 3. Please refer to Figure 2 The return loss in the UHB band of 3GHz-6GHz is (-10)~(-2)dB, and the return loss at the center frequency of 1.17GHz in the L5 band is -5.7dB, and the impedance matching is good.
[0037] Figure 3 This is the antenna efficiency diagram of the UHB band of the first feed end 2, please refer to Figure 3 , the antenna efficiency in the UHB band of 3GHz-6GHz is (-8)~(-3.5)dB.
[0038] Figure 4 This is the antenna efficiency diagram of the second feed end 3 in the L5 frequency band. Figure 4 , the antenna efficiency at the center frequency of the L5 band is 1.17GHz and is -9.3dB.
[0039] Figure 5 This is the S11 parameter diagram of the MHB band of the third feeder 4, please refer to Figure 5 , the return loss in the MHB band of 1.5GHz-3.0GHz is -11.8dB.
[0040] Figure 6 This is the antenna efficiency diagram of the MHB band of the third feeder 4, please refer to Figure 6 , the antenna efficiency in the MHB band of 1.5GHz-3.0GHz is -2.3dB.
[0041] Example 2
[0042] This embodiment also provides a metal frame mobile phone, Figure 7 This is a schematic diagram of the structure of a metal frame mobile phone, please refer to Figure 1 and Figure 7The metal-frame mobile phone includes a mobile phone motherboard 10 and the metal-frame mobile phone antenna of Example 1; the mobile phone motherboard 10 is arranged in the metal frame 1, and the mobile phone motherboard 10 is provided with a first feed matching circuit 6, a second feed matching circuit 7, a third feed matching circuit 8, a filter module 9 and a ground terminal; the first feed terminal 2 of the metal-frame mobile phone antenna is electrically connected to the first feed matching circuit 6, the second feed terminal 3 is electrically connected to the second feed matching circuit 7, and the third feed terminal 4 is electrically connected to the third feed matching circuit 8, the filter module 9 is arranged on the mobile phone motherboard 10, the filter module connection terminal 5 is electrically connected to the filter module 9, and the filter module 9 is electrically connected to the ground terminal.
[0043] In the metal-frame mobile phone provided in this embodiment, the metal frame 1 is separated by a first slit 13 and a second slit 14 to form an enclosing side frame 11 and a radiating side frame 12. The radiating side frame 12 is used for common branch antenna radiation and is connected to the first feeding end 2, the second feeding end 3, and the third feeding end 4 to form an antenna loop for three frequency bands. The multi-band multi-antenna design requirements are achieved without increasing the number of slits, the number of antennas in the mobile phone is reduced, and it is conducive to the lightweight design of the mobile phone.
[0044] In this embodiment, the filter module 9 is a 33PF capacitor.
[0045] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims and equivalent technologies of the present invention, the present invention is also intended to include these changes and modifications.
Claims
1. A metal frame mobile phone antenna, characterized by: It includes a metal frame, a first feeding end, a second feeding end, a third feeding end and a filter module connection end; The metal frame is provided with a first break and a second break, and the metal frame is divided by the first break and the second break to form an enclosing side frame and a radiation side frame; The first feeding end, the second feeding end and the third feeding end are electrically connected to the radiation side frame in sequence; the filter module connection end is used to connect to the ground end through the filter module on the mobile phone motherboard, and the filter module connection end is electrically connected to the radiation side frame.
2. The metal frame mobile phone antenna according to claim 1, characterized in that: The length of the radiation side frame between the first feeding end and the connection end of the filter module is 1 / 4-1 / 2 of the working frequency band of the first feeding end; The length of the radiation side frame between the second feeding end and the connection end of the filter module is 1 / 4-1 / 2 of the working frequency band of the second feeding end; The length of the radiation side frame between the third feeding end and the filter module connection end is 1 / 4-1 / 2 of the working frequency band of the third feeding end.
3. The metal frame mobile phone antenna according to claim 2, characterized in that: The operating frequency of the first feeding end is the UHB frequency band; the operating frequency band of the second feeding end is the L5 frequency band; and the operating frequency band of the third feeding end is the MHB frequency band.
4. The metal frame mobile phone antenna according to claim 2, characterized in that: The filter module connection end is located between the first feed end and the second feed end; or, the filter module connection end is located between the second feed end and the third feed end.
5. The metal frame mobile phone antenna according to claim 1, characterized in that: The radiation side frame is in a straight line or arc shape.
6. A metal frame mobile phone, characterized by: The invention comprises a mobile phone motherboard and the metal frame mobile phone antenna according to any one of claims 1 to 5; the mobile phone motherboard is arranged in the metal frame, and the mobile phone motherboard is provided with a first feed matching circuit, a second feed matching circuit, a third feed matching circuit, a filter module and a ground terminal; The first feeding end of the metal frame mobile phone antenna is electrically connected to the first feeding matching circuit, the second feeding end is electrically connected to the second feeding matching circuit, and the third feeding end is electrically connected to the third feeding matching circuit; the filtering module is arranged on the mobile phone motherboard, the filtering module connection end is electrically connected to the filtering module, and the filtering module is electrically connected to the ground end.
7. The metal frame mobile phone according to claim 6, characterized in that: The filter module is a 33PF capacitor.