Smart terminal devices

Abstract

This disclosure provides a smart terminal device that can be worn on the wrist, comprising: a mid-frame portion, the mid-frame portion being at least partially made of metal; a bottom shell portion, the bottom shell portion having a reflective portion, the reflective portion being made of metal, the reflective portion including a first surface, the reflective portion being insulated from the mid-frame portion; wherein, the mid-frame portion serves as an antenna for the smart terminal device, and the first surface is used to reflect electromagnetic waves to enhance the electromagnetic field near the mid-frame portion.

Description

Technical Field

[0001] This disclosure relates to the field of smart terminal devices such as smartwatches, and in particular to a smart terminal device. Background Technology

[0002] In the design process of smart terminal devices such as smartwatches and smart bracelets, for the sake of product appearance and texture, it is sometimes necessary to make the main body of the watch or bracelet shell (hereinafter referred to as the middle frame) with metal materials (such as stainless steel, titanium, various alloys such as aluminum alloy, zinc alloy, etc.).

[0003] When smart devices like watches or fitness trackers are worn on a user's wrist, the watch's metal frame is very close to the skin. Since the human body contains a large amount of water and soft tissue, these components absorb electromagnetic waves, altering the distribution of the electromagnetic field and changing antenna performance. Furthermore, the position and tightness of the watch or fitness tracker on the wrist also affect antenna performance, making it unstable. Therefore, the performance and stability of the antenna when a watch or fitness tracker is worn on the wrist are often much worse than when it is in free space.

[0004] Furthermore, taking watches as an example, due to their small size, the metal frame is often reused as an antenna for cellular, Bluetooth / Wi-Fi, and GNSS. Supporting multiple antennas such as cellular, Bluetooth / Wi-Fi, and GNSS on the same metal component is a significant technical challenge. Summary of the Invention

[0005] The intelligent terminal device disclosed herein is implemented through the following technical solution.

[0006] Smart terminal devices that can be worn on the wrist include: The middle frame portion is at least partially made of metal; The bottom shell portion has a reflective portion provided on it. The reflective portion is made of metal and includes a first surface. The reflective portion is insulated from the middle frame portion. The middle frame portion serves as the antenna of the smart terminal device, and the first surface is used to reflect electromagnetic waves to enhance the electromagnetic field near the middle frame portion.

[0007] According to at least one embodiment of the smart terminal device disclosed herein, the bottom shell is made of a non-metallic material and is fixedly connected to the middle frame.

[0008] According to at least one embodiment of the smart terminal device disclosed herein, the bottom shell is made of plastic.

[0009] According to at least one embodiment of the smart terminal device disclosed herein, the middle frame portion and the reflective portion are suspended, that is, the reflective portion and the middle frame portion are not in direct contact.

[0010] According to at least one embodiment of the present disclosure, the smart terminal device is configured such that the reflective part and the device grounding part (GND) are not in direct contact.

[0011] According to at least one embodiment of the intelligent terminal device disclosed herein, the reflective portion and the middle frame portion have a first distance in a direction perpendicular to the first surface.

[0012] According to at least one embodiment of the smart terminal device disclosed herein, the reflective part is a centrally symmetrical structure about its geometric center, or the reflective part may be an asymmetrical structure.

[0013] According to at least one embodiment of the smart terminal device disclosed herein, the reflective portion is annular.

[0014] According to at least one embodiment of the smart terminal device disclosed herein, the reflective part is a metal sheet, and the reflective part is fixedly connected to the bottom shell.

[0015] According to at least one embodiment of the smart terminal device of this disclosure, the reflective part is made of metal. The bottom shell portion has a bottom wall portion, the reflective portion covers the bottom wall portion, and the bottom wall portion has a shape that matches the reflective portion.

[0016] According to at least one embodiment of the smart terminal device of the present disclosure, at least the first surface of the reflective portion is covered with an insulating layer.

[0017] According to at least one embodiment of the smart terminal device disclosed herein, the surface of the middle frame is covered with an insulating layer.

[0018] According to at least one embodiment of the smart terminal device of this disclosure, the first surface is a plane.

[0019] According to at least one embodiment of the present disclosure, in a smart terminal device, the bottom shell portion forms a receiving space for accommodating the reflective portion.

[0020] According to at least one embodiment of the present disclosure, the smart terminal device further includes: The grounding part is used to electrically connect the middle frame part to the motherboard of the smart terminal device.

[0021] According to at least one embodiment of the present disclosure, the smart terminal device further includes: An antenna feed point is provided on the middle frame and is electrically connected to the motherboard of the smart terminal device to feed the radio frequency signal output by the motherboard into the middle frame. The number of antenna feed points is one or more.

[0022] According to at least one embodiment of the present disclosure, the smart terminal device includes at least a first antenna feed point for cellular communication and / or satellite navigation, and a second antenna feed point for Bluetooth communication and / or WIFI communication.

[0023] According to at least one embodiment of the intelligent terminal device of the present disclosure, the first antenna feed point is connected to the cellular communication module and the satellite navigation module respectively through a three-port notch filter. The notch filter produces high attenuation of the satellite navigation signal path in the cellular communication operating frequency band and high attenuation of the cellular communication signal path in the satellite navigation operating frequency band. Attached Figure Description

[0024] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0025] Figure 1 and Figure 2 This is a schematic diagram of the overall structure of a smart terminal device according to one embodiment of the present disclosure (rear perspective view).

[0026] Figure 3 and Figure 4 The diagram shown is a partial structural schematic of a smart terminal device.

[0027] Figure 5 and Figure 6 yes Figure 1 and Figure 2 The diagram shows the front structure of the smart terminal device.

[0028] Figure 7 and Figure 8 yes Figure 1 and Figure 2 The diagram shows the side structure of the smart terminal device.

[0029] Figure 9 and Figure 10 Is Figure 5 and Figure 6 The structural diagram is based on the original diagram after removing screen 500.

[0030] Figure 11 This is a schematic diagram of the topology of two antennas on a motherboard according to one embodiment of this disclosure. Detailed Implementation

[0031] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present disclosure are shown in the accompanying drawings.

[0032] It should be noted that, where there is no conflict, the embodiments and features described in this disclosure can be combined with each other. The technical solutions of this disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Unless otherwise stated, the exemplary implementations / embodiments shown are to be understood as providing exemplary features of various details that provide ways in which the technical concepts of this disclosure can be implemented in practice. Therefore, unless otherwise stated, the features of various implementations / embodiments may be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of this disclosure.

[0034] The use of crosshairs and / or shading in the accompanying drawings is generally used to clarify the boundaries between adjacent components. Thus, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for the specific material, material properties, dimensions, proportions, commonalities between the illustrated components, or any other characteristics, properties, etc., of the components. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0035] When a component is referred to as being "on" or "above" another component, "connected to," or "joined to" another component, the component may be directly on, directly connected to, or directly joined to the other component, or there may be intermediate components. However, when a component is referred to as being "directly on" another component, "directly connected to," or "directly joined to" another component, there are no intermediate components. Therefore, the term "connection" can refer to a physical connection, an electrical connection, etc., and may or may not have intermediate components.

[0036] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” another component or feature would subsequently be positioned “above” said other component or feature. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0037] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0038] First refer to Figures 1 to 4 In some embodiments of this disclosure, the smart terminal device of this disclosure can be worn on the wrist, including: The middle frame portion 100 is at least partially made of metal. The bottom shell portion 200 is provided with a reflective portion 300, which is made of metal and includes a first surface 301. The reflective portion 300 is insulated from the middle frame portion 100. The middle frame portion 100 serves as the antenna of the smart terminal device, and the first surface 301 is used to reflect electromagnetic waves to enhance the electromagnetic field near the middle frame portion 100.

[0039] In this disclosure, the middle frame 100 refers to the main structural part of the smartwatch casing, which is made of metal materials (such as stainless steel, aluminum alloy, zinc alloy, titanium metal, etc.) and serves both as structural support and as an antenna radiator.

[0040] The reflector 300 is preferably a metal component disposed on the bottom shell 200, with its first surface 301 facing the screen 500 of the smart terminal device. It can reflect the electromagnetic waves radiated by the antenna, thereby enhancing the electromagnetic field near the middle frame 100 and improving the antenna radiation efficiency.

[0041] It should be noted that, in addition to serving as an electromagnetic wave reflecting surface to enhance antenna efficiency, the reflector 300 also functions as an antenna stabilization reference surface.

[0042] The metal material of the reflector 300 forms a stable potential reference plane, providing a stable grounding reference for the antenna in the middle frame 100, so that the performance of the antenna in the wearing state is basically close to the performance in free space, reducing the influence of the hand on the antenna, and keeping the impedance characteristics of the antenna stable in the wearing state.

[0043] The insulation described above in this disclosure means that there is no direct electrical connection between the reflector 300 and the middle frame 100, so as to avoid short circuit between the two and affect the antenna performance.

[0044] The above technical solution mainly addresses two technical issues: first, improving the radiation efficiency of the antenna; and second, reducing the impact of the wrist on the antenna performance of the watch when worn by the human body.

[0045] In a preferred embodiment of this disclosure, the bottom shell portion 200 is made of a non-metallic material and is fixedly connected to the middle frame portion 100.

[0046] In some embodiments of this disclosure, the bottom shell portion 200 is made of plastic.

[0047] Continue to refer to Figure 3 and Figure 4 In a preferred embodiment of this disclosure, the middle frame portion 100 and the reflective portion 300 are suspended in mid-air, meaning that there is no direct contact between the reflective portion 300 and the middle frame portion 100.

[0048] The suspended configuration refers to the physical isolation between the reflector 300 and the middle frame 100 through the non-metallic material of the bottom shell 200, keeping them spatially separated without any direct metal contact points. This configuration ensures that the reflector 300 and the middle frame 100, which acts as the antenna radiator, remain insulated, preventing the formation of parasitic capacitance or short-circuit loops that could interfere with the normal operation of the antenna.

[0049] Meanwhile, the aforementioned suspended arrangement allows the reflector 300 to independently perform electromagnetic wave reflection without altering its electromagnetic properties due to direct contact with the middle frame 100.

[0050] The above structural design effectively solves the signal interference problem that may occur when multiple antennas are reused in a metal frame.

[0051] refer to Figure 3 and Figure 4 In a preferred embodiment of this disclosure, the reflective portion 300 and the middle frame portion 100 have a first distance in a direction perpendicular to the first surface 301 (i.e., perpendicular to the paper surface).

[0052] The first spacing can be preset. The first spacing refers to the distance between the first surface 301 of the reflective part 300 and the inner surface of the middle frame part 100 in the vertical direction (perpendicular to the paper direction).

[0053] The size of the aforementioned first spacing directly affects the electromagnetic wave reflection effect and the degree of antenna performance optimization. Too small a spacing will result in excessive coupling between the reflector 300 and the middle frame 100, potentially affecting antenna impedance matching; too large a spacing will weaken the enhancement effect of the reflector 300 on the electromagnetic field. In some embodiments of this disclosure, the first spacing is determined through electromagnetic simulation optimization based on the antenna operating frequency band (such as Cellular, GNSS, Bluetooth / WiFi bands).

[0054] For the smart terminal devices of the various embodiments described above, the reflective part 300 can be a centrally symmetrical structure about its geometric center.

[0055] The centrally symmetrical structure described above refers to the shape of the reflector 300 being symmetrically distributed about its geometric center point, such as annular, circular, or square shapes.

[0056] The purpose of adopting a centrally symmetrical structure in this disclosure is to make the electromagnetic wave reflection more uniform in all directions and avoid significant distortion of the antenna pattern; secondly, it facilitates the arrangement of sensor modules (such as heart rate sensors) in the central region of the reflector to achieve functional integration; and thirdly, it is beneficial for the multi-band operation of the antenna because the symmetrical structure has a more consistent response characteristic to electromagnetic waves with different polarization directions.

[0057] The above structural design is suitable for smartwatch antennas that need to support multiple communication standards such as Cellular, GNSS, and Bluetooth / WiFi simultaneously.

[0058] In some embodiments, the reflective portion 300 described above in this disclosure is annular.

[0059] refer to Figure 1 and Figure 2By designing the reflector 300 as a ring, the sensor module 600 (including a heart rate sensor) can be exposed through the reflector 300 to allow contact with the wrist. The sensor module 600 is electrically connected to the motherboard 700 (described below) of the smart terminal device.

[0060] Continue to refer to Figure 3 and Figure 4 In some embodiments of this disclosure, the reflective part 300 of the smart terminal device is a metal sheet, and the reflective part 300 is fixedly connected to the bottom shell part 200.

[0061] The metal sheet disclosed herein can be an independent metal plate with a certain thickness, and the material can be a metal with good electrical conductivity such as copper, aluminum, or stainless steel. The metal sheet can be fixedly connected to the bottom shell 200 by injection molding, bonding, snap-fit, or other methods.

[0062] The thickness of the metal sheet can be between 0.01mm and 1mm, which ensures sufficient electromagnetic reflection capability without significantly increasing the overall thickness and weight of the watch.

[0063] In other embodiments of this disclosure, the reflective portion 300 is made of a metal material, such as a metal film; the bottom shell portion 200 has a bottom wall portion, the reflective portion 300 is covered on the bottom wall portion, and the bottom wall portion has a shape that matches the reflective portion 300.

[0064] The metal film can be a thin metal layer formed on the bottom wall surface of the bottom shell 200 through processes such as vacuum coating, sputtering, and printing conductive ink.

[0065] The thickness of a metal film is typically in the micrometer range, much smaller than that of a metal sheet.

[0066] The metal film solution disclosed herein can significantly reduce the weight of the reflective part, which is beneficial to the lightweight design of watches; the metal film is integrally formed with the back case, simplifying the assembly process; the thickness and shape of the metal film can be precisely controlled, which facilitates the optimization of electromagnetic performance.

[0067] It should be noted that the surface of the metal film also needs to be covered with an insulating layer.

[0068] Any selection and / or adjustment of the material, type, shape, etc. of the reflective part 300 by those skilled in the art based on the technical solutions disclosed herein falls within the protection scope of this disclosure.

[0069] For the smart terminal device described above, preferably, at least the first surface 301 of the reflective portion 300 is covered with an insulating layer.

[0070] The purpose of providing an insulating layer on surfaces such as the first surface 301 is to ensure a stable insulating state between the reflective part 300 and the middle frame part 100, so that metal-to-metal contact will not occur even if the watch is squeezed or impacted.

[0071] For the smart terminal device described above, preferably, the surface of the middle frame 100 is covered with an insulating layer.

[0072] The insulating layer of the mid-frame 100 of the smartwatch can form a certain degree of isolation between the metal mid-frame and the human body, reducing the fluctuation of antenna performance when worn.

[0073] The first surface 301 of the reflective portion 300 described in this disclosure is a plane.

[0074] Continue to refer to Figure 3 and Figure 4 In some embodiments, the bottom shell 200 of the smart terminal device of this disclosure forms a receiving space (concave receiving space) for accommodating the reflective part 300.

[0075] refer to Figure 5 and Figure 6 The diagram shows the screen 500 of a smart terminal device, which is electrically connected to the motherboard 700 of the smart terminal device and can display various information such as time, heart rate, and steps. Figure 5 and Figure 6 The information displayed on the middle screen 500 is exemplary and should not be construed as a limitation on the functionality of the smart terminal device disclosed herein.

[0076] refer to Figures 5 to 8 The smart terminal device may also include a bezel 400, which surrounds the edge of the screen 500. The bezel 400 may be made of metal or plastic, etc., and this disclosure does not make any special restrictions on it.

[0077] refer to Figure 9 and Figure 10 The diagram shows a motherboard 700 for a smart terminal device (smartwatch). This disclosure does not impose any specific limitations on the specific functions or circuit structure of the motherboard 700.

[0078] The motherboard 700 can be accommodated in the cavity formed by the bottom shell 200, the reflective part 300, the middle frame 100 and the screen 500.

[0079] Continue to refer to Figure 9 and Figure 10 In a preferred embodiment of this disclosure, the smart terminal device further includes: Grounding part 801 (i.e., grounding point 801), the middle frame part 100 is electrically connected to the motherboard 700 of the smart terminal device via the grounding part 801.

[0080] The grounding part 801, or grounding point 801, is the electrical connection point between the middle frame 100 and the main board 700, and is used to provide a grounding reference for the antenna.

[0081] In some embodiments of this disclosure, a grounding portion 801 is disposed at approximately the 10 o'clock position on the mid-frame portion 100. The grounding portion provides a stable grounding reference point for the antenna radiator, ensuring antenna impedance matching; the grounding portion 801 can discharge static electricity that may accumulate on the mid-frame portion 100, protecting the motherboard.

[0082] The grounding part 801 can be achieved by means of spring pins, conductive adhesive, metal springs, etc., thereby realizing a reliable electrical connection between the middle frame part 100 and the main board 700.

[0083] In this disclosure, the reflective part 300 is not in direct contact with the middle frame part 100 and the equipment grounding part GND (such as the grounding part 801 mentioned above).

[0084] In a preferred embodiment of this disclosure, the smart terminal device further includes: Antenna feed point 901 is disposed on the middle frame portion 100. The antenna feed point 901 is electrically connected to the motherboard 700 of the smart terminal device and is used to feed the radio frequency signal output by the motherboard 700 into the middle frame portion 100. The number of antenna feed points 901 is one or more.

[0085] Antenna feed point 901 is the connection point where radio frequency signals are input from the main board 700 to the middle frame 100 (antenna radiator).

[0086] In some embodiments of this disclosure, the antenna feed point 901 is located at specific positions on the mid-frame portion 100, such as approximately the 7 o'clock position and approximately the 11 o'clock position.

[0087] In some implementations, the feed point at the 7 o'clock position serves as a shared feed point for GNSS and Cellular, while the feed point at the 11 o'clock position serves as a feed point for Bluetooth and WiFi.

[0088] Inspired by the technical solution disclosed herein, by rationally designing the feed point position, multiple antenna functions can be reused on the same metal frame, effectively solving the antenna design problem caused by the limited space in smartwatches.

[0089] Antenna feed point 901 can be connected to motherboard 700 via RF connector, solder pad, spring contact, etc.

[0090] In some implementations, the smart terminal device includes at least a first antenna feed point for cellular communication and / or satellite navigation, and a second antenna feed point for Bluetooth communication and / or WIFI communication.

[0091] Figure 11 It is a topology with two antennas on the motherboard 700. The GNSS module (satellite navigation module) and the Cellular module (cellular module) achieve antenna multiplexing through a three-port notch filter.

[0092] like Figure 11 As shown, the notch filter is a three-port device, with its input connected to the antenna feed point 901 and its two outputs connected to the Cellular module and the GNSS module, respectively.

[0093] The purpose of a notch filter is to provide high attenuation for GNSS signals in the cellular operating frequency band and high attenuation for cellular signals in the GNSS operating frequency band, thereby achieving effective isolation between the two frequency bands. This allows GNSS and cellular signals to share the same antenna feed point and mid-frame radiator, eliminating the need for separate antennas and significantly saving internal space in the smartwatch.

[0094] The center frequency, notch width, and notch depth of the notch filter can be designed according to the specific operating frequency bands of the Cellular and GNSS to ensure that interference between the two systems is minimized.

[0095] In the description of this specification, the references to terms such as "one embodiment / mode," "some embodiments / modes," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment / mode or example is included in at least one embodiment / mode or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment / mode or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments / modes or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments / modes or examples described in this specification, as well as the features of different embodiments / modes or examples.

[0096] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.

Claims

1. A smart terminal device, wearable on a wrist, characterized in that, include: The middle frame portion is at least partially made of metal; The bottom shell portion has a reflective portion provided on it. The reflective portion is made of metal and includes a first surface. The reflective portion is insulated from the middle frame portion. The middle frame portion serves as the antenna of the smart terminal device, and the first surface is used to reflect electromagnetic waves to enhance the electromagnetic field near the middle frame portion.

2. The intelligent terminal device of claim 1, wherein, The bottom shell is made of non-metallic material.

3. The intelligent terminal device of claim 1, wherein, The bottom shell is made of plastic.

4. The intelligent terminal device of claim 1, wherein, The middle frame and the reflective part are suspended, meaning that there is no direct contact between the reflective part and the middle frame.

5. The intelligent terminal device of claim 4, wherein, The reflective portion and the middle frame portion have a first distance in a direction perpendicular to the first surface.

6. The intelligent terminal device of claim 1, wherein, The reflective part has a centrally symmetrical structure about its geometric center.

7. The intelligent terminal device of claim 6, wherein, The reflective part is ring-shaped.

8. The intelligent terminal device of claim 1, wherein, The reflective part is a metal sheet, and the reflective part is fixedly connected to the bottom shell.

9. The intelligent terminal device according to claim 1, characterized in that, The reflective part is a metal film; The bottom shell portion has a bottom wall portion, the reflective portion covers the bottom wall portion, and the bottom wall portion has a shape that matches the reflective portion.

10. The intelligent terminal device according to any one of claims 1 to 9, characterized in that, At least the first surface of the reflective portion is covered with an insulating layer; Optionally, the surface of the middle frame is covered with an insulating layer; Optionally, the first surface is a plane; Optionally, the bottom shell portion forms a receiving space for accommodating the reflector; Optionally, the smart terminal device further includes: The grounding part is provided, and the middle frame is electrically connected to the motherboard of the smart terminal device via the grounding part. Optionally, the smart terminal device further includes: An antenna feed point is provided on the middle frame and is electrically connected to the motherboard of the smart terminal device to feed the radio frequency signal output by the motherboard into the middle frame. The number of antenna feed points is one or more; Optionally, the smart terminal device includes at least a first antenna feed point for cellular communication and / or satellite navigation, and a second antenna feed point for Bluetooth communication and / or WIFI communication; Optionally, the first antenna feed point is connected to the cellular communication module and the satellite navigation module respectively through a three-port notch filter. The notch filter produces high attenuation of the satellite navigation signal path in the cellular communication operating frequency band and high attenuation of the cellular communication signal path in the satellite navigation operating frequency band.

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