Mobile phone shell attached with non-contact antenna and suitable for mobile phone Sub-GHz frequency band communication

Abstract

The utility model discloses a mobile phone shell with a non-contact antenna suitable for mobile phone Sub-GHz frequency band communication, and relates to the technical field of mobile communication and wireless communication, the mobile phone shell comprises a shell body, a decoration assembly arranged at the top of the shell body, a slotting area arranged in the shell body and an FPC soft board, the decoration assembly is internally provided with the antenna, and the antenna is arranged in the slotting area. A coupling coil forming magnetic flux coupling with a coil in the mobile phone is arranged on the FPC soft board, the antenna is communicated with the coupling coil, the coupling coil and the coil in the mobile phone achieve magnetic flux coupling, and mobile phone signals are transmitted to the antenna. According to the utility model, the design is reasonable, and the coil in the mobile phone and the coupling coil on the FPC soft board form magnetic flux coupling. A non-contact magnetic flux coupling mode is adopted for feeding, and transmission of radio frequency signals is achieved. The wireless communication capability of the mobile phone in the Sub-GHz frequency band is enhanced; the antenna is hidden in the decorative structure and is beautiful and practical.

Description

Technical Field

[0001] This utility model relates to the fields of mobile communication and wireless communication technology, and more specifically to the field of mobile phone case technology with attached non-contact antenna suitable for Sub-GHz frequency band communication of mobile phones. Background Technology

[0002] With the rapid development of the Internet of Things (IoT), smart homes, industrial automation, and emergency communications, Sub-GHz bands (such as 433MHz, 868MHz, and 915MHz) have become an important carrier for short-range wireless communication due to their advantages such as strong penetration, long transmission distance, and low power consumption. Especially in remote areas without cellular network coverage or in emergency scenarios, communication devices based on the Sub-GHz band (such as LoRa, Zigbee, and custom protocol modules) are widely used in environmental monitoring, remote control, and disaster relief. However, current smartphones generally support cellular networks (such as 4G / 5G) and high-frequency Wi-Fi / Bluetooth, and their built-in antenna systems are usually not adapted to the Sub-GHz band. This prevents phones from directly participating in such specialized communication scenarios, limiting users' functional expansion in offline environments.

[0003] In existing technologies, two main solutions are used to extend the Sub-GHz communication capabilities of mobile phones: one is through external plug-in antennas or radio frequency modules (such as USB Dongles). These devices require physical interfaces (such as Type-C or Lightning), which disrupt the integrity of the phone's appearance and make it inconvenient to carry; the other is to use external decorative items to include the antenna. However, traditional designs often rely on physical contacts to connect to the phone's motherboard, which can affect waterproofing and dustproofing, and the contacts are prone to oxidation.

[0004] In summary, existing Sub-GHz antennas, especially those for 433MHz, are large in size, resulting in insufficient space for integration into mobile phones and issues such as narrow bandwidth, low gain, and matching difficulties. Existing external antennas rely on metal contacts or exposed interfaces, which can affect dust and water resistance, and the exposed metal may oxidize, leading to antenna failure. Utility Model Content

[0005] The purpose of this utility model is to solve the above-mentioned technical problems by providing a mobile phone case with an attached non-contact antenna suitable for Sub-GHz band communication of mobile phones.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] This utility model provides a mobile phone case with an attached non-contact antenna suitable for Sub-GHz band communication of mobile phones. It includes a housing, a decorative component disposed on the top of the housing, a slotted area disposed in the housing, and an FPC flexible board. The decorative component is provided with an antenna, and the FPC flexible board is provided with a coupling coil that forms magnetic flux coupling with the coil inside the mobile phone. The antenna is connected to the coupling coil, and the coupling coil achieves magnetic flux coupling with the coil inside the mobile phone, so as to transmit the mobile phone signal to the antenna.

[0008] Specifically, in this solution, the coil inside the phone forms magnetic flux coupling with the coupling coil on the FPC flexible board. Power is supplied using non-contact magnetic flux coupling to achieve radio frequency signal transmission. This enhances the phone's wireless communication capabilities in the Sub-GHz band; the antenna is hidden within the decorative structure, making it both aesthetically pleasing and practical.

[0009] In one embodiment, the FPC flexible board further includes an extension line and a matching network; the matching network includes a parallel capacitor and a series capacitor, one terminal of the parallel capacitor is connected to the first terminal of the coupling coil and to the series capacitor, the other terminal of the parallel capacitor is connected to the second terminal of the coupling coil and to the extension line; the coupling coil achieves magnetic flux coupling with the coil inside the mobile phone to transmit the mobile phone signal to the antenna.

[0010] In one embodiment, both the parallel capacitor and the series capacitor comprise a pair of parallel metal plates.

[0011] In one embodiment, the decorative component includes two decorative ears disposed on the top of the housing, each decorative ear including an integrally formed upper ear cover and a lower ear cover, the upper ear cover and the lower ear cover forming an ear-shaped cavity.

[0012] In one embodiment, the antenna is disposed at the top of the ear-shaped cavity along the contour of the cavity, and one end of the antenna is connected to a series capacitor via a wire.

[0013] In one implementation, the antenna is a planar serpentine antenna.

[0014] In one embodiment, a camera hole is provided inside the housing near the decorative component, and an opening is provided at the corresponding position on the FPC flexible board.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model features a reasonable design. By embedding an FPC substrate into the phone case, it integrates a miniaturized Sub-GHz antenna with a high-sensitivity coupling coil. This structure eliminates the need for a physical interface, achieving energy transfer from the phone's motherboard to the extended antenna solely through electromagnetic field coupling. While maintaining a slim and aesthetically pleasing phone case, it significantly improves the communication efficiency and stability of the 433MHz band, filling the functional gap in native phone hardware for Sub-GHz wireless communication.

[0017] 2. In this solution, the coil inside the mobile phone forms magnetic flux coupling with the coupling coil on the FPC flexible board. Power supply uses a non-contact magnetic flux coupling method to achieve radio frequency signal transmission. This enhances the mobile phone's wireless communication capabilities in the Sub-GHz band; the antenna is hidden within the decorative structure, making it both aesthetically pleasing and practical. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 yes Figure 1 Another view from a different direction;

[0021] Figure 3 yes Figure 1 The front view;

[0022] Figure 4 yes Figure 1 A schematic diagram of a partial structure;

[0023] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0024] Reference numerals: 1-Housing, 2-Decorative ear, 3-Slotted area, 4-FPC flexible board, 5-Flexible board hole, 6-Coupled coil, 7-Matching network, 8-Extension line, 9-Antenna, 10-Parallel capacitor, 11-Series capacitor. Detailed Implementation

[0025] To make the technical problems, technical solutions, and technical effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Example 1

[0030] like Figures 1 to 5 As shown, this embodiment provides a mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones. It includes a housing 1, a decorative component disposed on the top of the housing 1, a slotted area 3 disposed in the housing 1, and an FPC flexible board 4. An antenna 9 is disposed inside the decorative component. A coupling coil 6 is disposed on the FPC flexible board 4 to form magnetic flux coupling with the coil inside the mobile phone. The antenna 9 is connected to the coupling coil 6. The coupling coil 6 achieves magnetic flux coupling with the coil inside the mobile phone, and transmits the mobile phone signal to the antenna 9.

[0031] Specifically, in this solution, the coil inside the mobile phone forms magnetic flux coupling with the coupling coil 6 on the FPC flexible board 4. Power is supplied using non-contact magnetic flux coupling to achieve radio frequency signal transmission. This enhances the mobile phone's wireless communication capabilities in the Sub-GHz band; the antenna 9 is hidden within the decorative structure, making it both aesthetically pleasing and practical.

[0032] Example 2

[0033] like Figures 1 to 5As shown, this embodiment provides a mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones. It includes a housing 1, a decorative component disposed on the top of the housing 1, a slotted area 3 disposed in the housing 1, and an FPC flexible board 4. An antenna 9 is disposed inside the decorative component. A coupling coil 6 is disposed on the FPC flexible board 4 to form magnetic flux coupling with the coil inside the mobile phone. The antenna 9 is connected to the coupling coil 6. The coupling coil 6 achieves magnetic flux coupling with the coil inside the mobile phone, and transmits the mobile phone signal to the antenna 9.

[0034] The FPC flexible board 4 also includes an extension line 8 and a matching network 7. The matching network 7 includes a parallel capacitor 10 and a series capacitor 11. One terminal of the parallel capacitor 10 is connected to the first terminal of the coupling coil 6 and to the series capacitor 11. The other terminal of the parallel capacitor 10 is connected to the second terminal of the coupling coil 6 and to the extension line 8. The coupling coil 6 achieves magnetic flux coupling with the coil inside the mobile phone, transmitting the mobile phone signal to the antenna 9.

[0035] Both the parallel capacitor 10 and the series capacitor 11 include a pair of parallel metal plates.

[0036] Example 3

[0037] like Figures 1 to 5 As shown, this embodiment provides a mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones. It includes a housing 1, a decorative component disposed on the top of the housing 1, a slotted area 3 disposed in the housing 1, and an FPC flexible board 4. An antenna 9 is disposed inside the decorative component. A coupling coil 6 is disposed on the FPC flexible board 4 to form magnetic flux coupling with the coil inside the mobile phone. The antenna 9 is connected to the coupling coil 6. The coupling coil 6 achieves magnetic flux coupling with the coil inside the mobile phone, and transmits the mobile phone signal to the antenna 9.

[0038] The FPC flexible board 4 also includes an extension line 8 and a matching network 7. The matching network 7 includes a parallel capacitor 10 and a series capacitor 11. One end of the series capacitor 11 is connected to the antenna 9, and the other end of the series capacitor 11 is connected to the parallel capacitor 10. One port of the parallel capacitor 10 is connected to the coupling coil 6, and the other port of the parallel capacitor 10 is connected to the extension line 8. The coupling coil 6 achieves magnetic flux coupling with the coil inside the mobile phone, transmitting the mobile phone signal to the antenna 9.

[0039] Both the parallel capacitor 10 and the series capacitor 11 include a pair of parallel metal plates.

[0040] The decorative component includes two decorative ears 2 disposed on the top of the housing 1. Each decorative ear 2 includes an integrally formed upper ear cover and a lower ear cover, which together form an ear-shaped cavity.

[0041] Antenna 9 is positioned at the top of the ear-shaped cavity along its contour, and one end of antenna 9 is connected to series capacitor 11 via a wire.

[0042] Antenna 9 is a planar serpentine antenna.

[0043] A camera hole is provided inside the housing 1 near the decorative component, and an opening 5 is provided at the corresponding position on the FPC flexible board 4.

[0044] Example 4

[0045] like Figures 1 to 5 As shown, this embodiment provides a mobile phone case with an integrated contactless antenna suitable for Sub-GHz band communication. The dimensions of this design example are 224mm*92mm*12mm, and it consists of a housing 1, an FPC flexible circuit board 4, and an antenna. The housing 1 has a pair of decorative ears 2, and the antenna is installed within these decorative ears 2 using a concealed mounting method. The housing 1 has a slotted area 3, and the FPC flexible circuit board 4 includes an extension line 8, a matching network 7, and a coupling coil 6. The antenna 9 is embedded within the decorative ears 2, and the FPC flexible circuit board 4 is flush against the inner wall of the mobile phone case. The coupling coil 6 achieves magnetic flux coupling with a coil inside the mobile phone, transmitting the mobile phone signal to the antenna 9.

Claims

1. A mobile phone case with an integrated contactless antenna suitable for Sub-GHz band communication, characterized in that, The device includes a housing (1), a decorative component disposed on the top of the housing (1), a slotted area (3) disposed within the housing (1), and an FPC flexible board (4). An antenna (9) is disposed inside the decorative component. A coupling coil (6) is disposed on the FPC flexible board (4) to form magnetic flux coupling with the coil inside the mobile phone. The antenna (9) is connected to the coupling coil (6). The coupling coil (6) achieves magnetic flux coupling with the coil inside the mobile phone, transmitting the mobile phone signal to the antenna (9).

2. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 1, characterized in that, The FPC flexible board (4) also includes an extension line (8) and a mating network (7).

3. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 2, characterized in that, The matching network (7) includes a parallel capacitor (10) and a series capacitor (11). One end of the series capacitor (11) is connected to the antenna (9), and the other end of the series capacitor (11) is connected to the parallel capacitor (10). One terminal of the parallel capacitor (10) is connected to the first terminal of the coupling coil (6) and to the series capacitor (11). The other terminal of the parallel capacitor (10) is connected to the second terminal of the coupling coil (6) and to the extension line (8). The coupling coil (6) achieves magnetic flux coupling with the coil inside the mobile phone, transmitting the mobile phone signal to the antenna (9).

4. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 3, characterized in that, Both the parallel capacitor (10) and the series capacitor (11) include a pair of parallel metal plates.

5. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 3, characterized in that, The decorative component includes two decorative ears (2) disposed on the top of the housing (1), each of the decorative ears (2) including an integrally formed upper ear cover and a lower ear cover, the upper ear cover and the lower ear cover forming an ear-shaped cavity.

6. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 5, characterized in that, The antenna (9) is disposed at the top of the ear-shaped cavity along the contour of the ear-shaped cavity, and one end of the antenna (9) is connected to the series capacitor (11) through a wire.

7. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 6, characterized in that, The antenna (9) is a planar serpentine antenna.

8. A mobile phone case with an attached contactless antenna suitable for Sub-GHz band communication of mobile phones according to claim 1, characterized in that, A camera hole is provided inside the housing (1) near the decorative component, and an opening (5) is provided on the FPC flexible board (4) at the corresponding position.

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