Camera metal decoration, antenna device and electronic equipment

Abstract

Embodiments of the present application provide a camera metal decoration, an antenna device and an electronic device, comprising: a metal decoration body; a feed-in point configured to feed in an excitation signal of a first frequency range; a first ground point configured to be grounded through a first impedance network, so that the first ground point forms a short circuit for the first frequency range, and the metal decoration body resonates in the first frequency range; and a second ground point configured to be grounded through a second impedance network, so that the second ground point forms an open circuit for the first frequency range and forms a short circuit for a second frequency range, wherein the second frequency range is different from the first frequency range. The camera metal decoration can be multiplexed as an antenna to realize a wireless communication function, and can reduce interference caused to other antennas of the electronic device.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a metal decorative part for a camera, an antenna device, and an electronic device. Background Technology

[0002] With the development of electronic technology, electronic devices such as smartphones are increasingly incorporating more cameras, such as dual cameras, triple cameras, or even quad cameras, to meet the demands of photography. To achieve an attractive appearance and enhance brand recognition, designers from various manufacturers typically design metal decorative parts to cover the camera lens.

[0003] However, metal decorative parts for cameras can cause noise in the communication system of electronic devices, interfering with the communication frequency bands of electronic devices, and can also reduce the antenna design space of electronic devices, making antenna design difficult. Summary of the Invention

[0004] This application provides a camera metal decorative part, an antenna device, and an electronic device, which can simplify the antenna design of the electronic device and reduce the interference of the camera metal decorative part on the communication of the electronic device.

[0005] This application provides a metal decorative component for a camera, including:

[0006] Metal decorative component body;

[0007] A feed point is provided on the metal decorative part body, and the feed point is used to feed in an excitation signal in a first frequency range;

[0008] A first grounding point is provided on the metal decorative part body. The first grounding point is used to ground through a first impedance network so that the first grounding point forms a short circuit with respect to the first frequency range, so that the metal decorative part body generates resonance in the first frequency range.

[0009] The second grounding point is disposed on the metal decorative part body. The second grounding point is used to ground through the second impedance network so that the second grounding point forms an open circuit with respect to the first frequency range and a short circuit with respect to the second frequency range.

[0010] The second frequency range is different from the first frequency range.

[0011] This application also provides an antenna device, including:

[0012] Such as the metal decorative parts for cameras mentioned above;

[0013] The first feed source is electrically connected to the feed point of the metal decorative part of the camera, and the first feed source is used to feed an excitation signal of a first frequency range to the feed point.

[0014] A first impedance network is electrically connected to a first grounding point of the metal decorative part of the camera, and the first impedance network is grounded.

[0015] The second impedance network is electrically connected to the second grounding point of the camera's metal decorative component, and the second impedance network is grounded.

[0016] This application also provides an electronic device, including:

[0017] Camera;

[0018] A camera metal decorative piece is installed on the camera, and the camera metal decorative piece is the aforementioned camera metal decorative piece.

[0019] The camera metal decorative component provided in this application, by setting a feed point, a first ground point, and a second ground point, enables the metal decorative component body to resonate within a first frequency range, thereby allowing the camera metal decorative component to be reused as an antenna to achieve wireless communication functionality. Furthermore, the second ground point forms a short circuit with respect to the second frequency range, thus reducing interference to wireless signals in the second frequency range and consequently reducing interference caused by the camera metal decorative component to other antennas of the electronic device. Further, in some embodiments, the camera metal decorative component also includes a third ground point, which also forms a short circuit with respect to the second frequency range, thereby further reducing interference caused by the camera metal decorative component to other antennas of the electronic device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the first structure of the camera metal decorative part provided in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram of a second structure of the camera metal decorative part provided in an embodiment of this application.

[0024] Figure 4 for Figure 3 The diagram shows the electrical length between the feed point and each grounding point of the camera's metal decorative component.

[0025] Figure 5 This is a schematic diagram of a third structure for the camera metal decorative part provided in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the antenna device provided in an embodiment of this application.

[0027] Figure 7 This is a schematic diagram of the structure of the first impedance network of the antenna device provided in the embodiments of this application.

[0028] Figure 8 This is a schematic diagram showing the connection relationship between the antenna device and the circuit board provided in the embodiments of this application.

[0029] Figure 9 This is a schematic diagram of the first Z-parameter of the antenna device provided in the embodiments of this application.

[0030] Figure 10 This is a schematic diagram of a second type of Z-parameters for the antenna device provided in an embodiment of this application.

[0031] Figure 11 This is a schematic diagram of a third type of Z-parameter for the antenna device provided in the embodiments of this application.

[0032] Figure 12 This is a schematic diagram of the fourth Z-parameter of the antenna device provided in the embodiments of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] This application provides an electronic device. The electronic device can be a smartphone, tablet computer, or other similar device, as well as a gaming device, AR (Augmented Reality) device, laptop computer, desktop computing device, etc.

[0035] refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an electronic device 100 provided in an embodiment of this application. The electronic device 100 includes a main body 10, a camera 20, and a camera metal decorative part 30.

[0036] The main body 10 forms the main structure of the electronic device 100. In one possible case, the main body 10 includes a housing and structures such as circuit boards and batteries disposed inside the housing, as well as structures such as a display screen disposed on the housing.

[0037] The camera 20 is disposed on the main body 10. For example, the camera 20 can be mounted on the housing and electrically connected to circuitry on a circuit board. There can be one or more cameras 20, for example... Figure 1 The diagram shows three cameras 20. When there are multiple cameras 20, the functions and parameters of each camera 20 can be different. For example, multiple cameras 20 may include different types of cameras such as a main camera, a telephoto camera, a macro camera, and a depth-sensing camera.

[0038] The camera metal decorative piece 30 is installed on the camera 20, for example, it can be sleeved on the camera 20. The camera metal decorative piece 30 can be used to cover the internal structure of the location of the camera 20, such as covering the connection structure between the camera 20 and the housing, covering the outer peripheral structure of the camera 20, so as to beautify the appearance of the electronic device 100 and enhance the overall visual aesthetics of the electronic device 100.

[0039] The camera metal decorative component 30 can be a thin sheet-like metal structure. In one possible scenario, the camera metal decorative component 30 can be made of materials with good electrical conductivity, such as copper, aluminum, or aluminum alloy.

[0040] Also refer to Figure 2 , Figure 2 This is a schematic diagram of the first structure of the camera metal decorative part 30 provided in the embodiments of this application.

[0041] The camera metal decorative part 30 includes a metal decorative part body 31, a feed point 33, a first grounding point 34, and a second grounding point 35.

[0042] The metal decorative component body 31 forms the main structure of the camera metal decorative component 30. The metal decorative component body 31 can be a thin sheet-like metal structure. In one possible case, the material of the metal decorative component body 31 can include materials with good electrical conductivity such as copper, aluminum, or aluminum alloy.

[0043] The metal decorative component body 31 is provided with one or more through holes 32. The number of through holes 32 is the same as the number of cameras 20. For example, when there are three cameras 20, the number of through holes 32 is also three. The through holes 32 are used to pass through the cameras 20. It can be understood that when the camera metal decorative component 30 is installed on the camera 20, the metal decorative component body 31 can be fitted onto the camera 20 through the through holes 32, thereby allowing the camera 20 to pass through the through holes 32. Therefore, the camera metal decorative component 30 can both conceal the internal structure of the electronic device 100 and not obstruct the cameras 20.

[0044] Feed point 33 is disposed on the metal decorative part body 31. Feed point 33 can be, for example, a metal contact or a pad. Feed point 33 is used to feed an excitation signal within a first frequency range. The first frequency range can be set according to actual application requirements. In one possible embodiment, the first frequency range is 0.6 GHz to 1 GHz. In wireless communication, frequencies below 1 GHz are generally understood as low frequencies; therefore, in this embodiment, the excitation signal within the first frequency range can be understood as a low-frequency excitation signal.

[0045] The first grounding point 34 is disposed on the metal decorative part body 31. The first grounding point 34 can also be a metal contact or a solder pad, etc. The first grounding point 34 is used for grounding through a first impedance network. The first impedance network can be disposed on the circuit board of the electronic device 100. By reasonably designing the impedance of the first impedance network, when the first grounding point 34 is grounded through the first impedance network, the first grounding point 34 forms a short circuit for the first frequency range.

[0046] Therefore, when an excitation signal of the first frequency range is fed through the feed point 33, a current path can be formed between the feed point 33 and the first ground point 34 of the metal decorative part body 31, and a resonant current can be formed between the feed point 33 and the first ground point 34, thereby causing the metal decorative part body 31 to resonate in the first frequency range and radiate wireless signals in the first frequency range. Therefore, the camera metal decorative part 30 can not only function as a decorative part, but also be reused as an antenna in the first frequency range, radiating wireless signals in the first frequency range, thereby realizing wireless communication function.

[0047] The second grounding point 35 is disposed on the metal decorative part body 31. Similarly, the second grounding point 35 can also be a metal contact or a solder pad, etc. The second grounding point 35 is used for grounding through a second impedance network. The second impedance network can be disposed on the circuit board of the electronic device 100. By reasonably designing the impedance of the second impedance network, the second grounding point 35 can be made to form an open circuit with respect to the first frequency range and a short circuit with respect to the second frequency range.

[0048] The second frequency range differs from the first frequency range. The second frequency range can also be set according to actual application requirements. In one possible implementation, the second frequency range is greater than 1 GHz. In wireless communication, frequencies higher than 1 GHz typically include intermediate frequency (IF), high frequency (HF), and ultra-high frequency (UHF). Therefore, in this implementation, the second frequency range can be understood as including IF, HF, and UHF. In practical applications, both the first and second frequency ranges can be the frequency ranges of wireless communication signals such as 4G, 5G, Wi-Fi, Bluetooth, and GPS. Correspondingly, the excitation signal for the first frequency range can be the excitation signal for wireless communication such as 4G, 5G, Wi-Fi, Bluetooth, and GPS.

[0049] Understandably, since the second grounding point 35 forms an open circuit for the first frequency range, when an excitation signal of the first frequency range is fed into the metal decorative component body 31 through the feed point 33, the current path is still formed between the feed point 33 and the first grounding point 34. The second grounding point 35 will not affect the excitation signal of the first frequency range. Therefore, it will not affect the resonance of the metal decorative component body 31 in the first frequency range, thereby ensuring the antenna performance of the camera metal decorative component 30 when used as an antenna.

[0050] In some embodiments, reference is also made to Figure 3 , Figure 3 This is a schematic diagram of a second structure of the camera metal decorative part 30 provided in an embodiment of this application. The camera metal decorative part 30 further includes a third grounding point 36. The third grounding point 36 is disposed on the metal decorative part body 31. Similarly, the third grounding point 36 can also be a metal contact or a solder pad, etc. The third grounding point 36 is used for grounding through a third impedance network. The third impedance network can be disposed on the circuit board of the electronic device 100. By reasonably designing the impedance of the third impedance network, the third grounding point 36 can form an open circuit with respect to the first frequency range and a short circuit with respect to the second frequency range.

[0051] In this configuration, both the second grounding point 35 and the third grounding point 36 form an open circuit for the first frequency range. Therefore, when an excitation signal of the first frequency range is fed into the metal decorative component body 31 through the feed point 33, the current path remains between the feed point 33 and the first grounding point 34. The second grounding point 35 and the third grounding point 36 do not affect the excitation signal of the first frequency range. Consequently, they do not affect the resonance of the metal decorative component body 31 within the first frequency range, thus ensuring the antenna performance of the camera metal decorative component 30 as an antenna.

[0052] In one possible scenario, the maximum size of the metal decorative element body 31 can be approximately one-quarter of the wavelength corresponding to the first frequency range, or slightly smaller than one-quarter of the wavelength corresponding to the first frequency range. That is, the maximum size of the metal decorative element body 31 is less than or equal to one-quarter of the wavelength corresponding to the first frequency range. It is understood that the wavelength corresponding to the first frequency range can also include a wavelength range; therefore, in practical applications, the maximum size of the metal decorative element body 31 can vary depending on the first frequency range. Specifically, the maximum size of the metal decorative element body 31 can be the size of the longest diagonal in terms of geometric dimensions, or the size of the path formed by extending from one end of the longest diagonal along the periphery of the metal decorative element body 31 to the other end in terms of geometric dimensions.

[0053] In practical applications, the electronic device 100 may also include multiple antennas operating in various frequency bands, such as intermediate frequency antennas, high frequency antennas, and ultra-high frequency antennas. When these antennas are operating, it is necessary to ensure that surrounding metal structures and components do not interfere with them. In one possible scenario, the electronic device 100 may include antennas operating in the aforementioned second frequency range, such as antennas operating at frequencies above 1 GHz. In practical applications, the operating frequency bands of other antennas in the electronic device 100 can be determined first, and the frequency range of that operating frequency band can be used as the second frequency range. Then, by rationally designing the impedances of the second and third impedance networks, the second grounding point 35 and the third grounding point 36 can be short-circuited to the second frequency range. Therefore, for antennas operating in the second frequency range, the metal decorative component body 31 has one or more short-circuit points, which can reduce the interference of the metal decorative component body 31 to that antenna, thereby reducing the interference caused by the camera metal decorative component 30 to other antennas of the electronic device 100.

[0054] In some embodiments, one of the second ground point 35 and the third ground point 36 is also used to feed in an excitation signal in the third frequency range, and the other of the second ground point 35 and the third ground point 36 forms a short circuit for the third frequency range. The following description uses the third ground point 36 as an example for feeding in an excitation signal in the third frequency range and the second ground point 35 forming a short circuit for the third frequency range.

[0055] The third frequency range differs from both the first and second frequency ranges and can be set according to actual application requirements. In practical applications, the excitation signal for the third frequency range can be excitation signals for wireless communications such as 4G, 5G, WIFI, Bluetooth, and GPS. For example, in one possible scenario, the excitation signal for the third frequency range could include a 2.4GHz WIFI excitation signal and an excitation signal for the B40 (2.3GHz~2.4GHz) band of 4G communication, in which case the third frequency range could include 2.3GHz~2.4GHz. It should be noted that although the third grounding point 36 is grounded through a third impedance network, it is understandable that through proper design of the third impedance network, an open circuit can be formed between the third grounding point 36 and the reference ground for the third frequency range. Therefore, the excitation signal for the third frequency range fed through the third grounding point 36 will not directly return to ground but can be conducted on the metal decorative body 31.

[0056] The second grounding point 35 forms a short circuit with respect to the third frequency range. For example, by properly designing the impedance of the second impedance network, the second grounding point 35 can be made to form an open circuit with respect to the first frequency range and a short circuit with respect to both the second and third frequency ranges. Therefore, when an excitation signal of the third frequency range is fed in through the third grounding point 36, a current path can be formed between the third grounding point 36 and the second grounding point 35 of the metal decorative part body 31, and a resonant current can be formed between the third grounding point 36 and the second grounding point 35, thereby causing the metal decorative part body 31 to resonate in the third frequency range and radiate wireless signals in the third frequency range outward.

[0057] Understandably, in this configuration, the excitation signal in the first frequency range forms a current path between the feed point 33 and the first ground point 34, and the excitation signal in the third frequency range forms a current path between the third ground point 36 and the second ground point 35. Therefore, the two current paths are isolated from each other, and the two resonances generated by the metal decorative body 31 are also isolated from each other. Thus, the metal decorative body 31 can simultaneously radiate wireless signals in both the first and third frequency ranges, enabling the camera metal decorative part 30 to be reused not only as an antenna in the first frequency range but also as an antenna in the third frequency range, achieving wireless communication functions in two different frequency bands. This expands the communication bandwidth and improves communication performance.

[0058] In some embodiments, the feed point 33 is also used to feed in the excitation signal of the second frequency range. Since the second ground point 35 forms a short circuit to the second frequency range, a current path for the excitation signal of the second frequency range can be formed between the feed point 33 and the second ground point 35; or, if both the second ground point 35 and the third ground point 36 form a short circuit to the second frequency range, a current path for the excitation signal of the second frequency range can be formed between the feed point 33 and the second ground point 35, and between the feed point 33 and the third ground point 36. Therefore, the metal decorative part body 31 can generate resonance in the second frequency range and radiate wireless signals in the second frequency range outward. In this case, the camera metal decorative part 30 can be reused not only as an antenna for the first frequency range, but also as an antenna for the second frequency range, thus expanding the communication bandwidth and improving communication performance.

[0059] In some embodiments, feed point 33 is also used to feed an excitation signal in a fourth frequency range. This fourth frequency range differs from both the first and second frequency ranges described above. In practical applications, the excitation signal in the fourth frequency range can be an excitation signal for wireless communications such as 4G, 5G, WIFI, Bluetooth, or GPS. In one possible scenario, the excitation signal in the fourth frequency range can be, for example, a low-frequency signal for 5G communication.

[0060] In this configuration, the first grounding point 34 forms a short circuit for the fourth frequency range. For example, by properly designing the impedance of the first impedance network, the first grounding point 34 can be made to form a short circuit for both the first and fourth frequency ranges. Therefore, when an excitation signal for the fourth frequency range is fed in through the feed point 33, a current path for the excitation signal for the fourth frequency range can be formed between the feed point 33 and the first grounding point 34. This allows the metal decorative part body 31 to resonate in the fourth frequency range and radiate wireless signals in the fourth frequency range. In this case, the camera metal decorative part 30 can be reused not only as an antenna for the first frequency range but also as an antenna for the fourth frequency range, thus expanding the communication bandwidth and improving communication performance.

[0061] In practical applications, when the camera metal decorative piece 30 is reused as an antenna, it is necessary to ensure that the feed point of the excitation signal (e.g., feed point 33 and the third grounding point 36) is far away from existing antennas of the same or adjacent frequencies in the electronic device to reduce mutual interference between antennas. For example, if the camera metal decorative piece 30 is reused as an antenna to cover the 2.4GHz WIFI and 4G communication B40 (2.3GHz~2.4GHz) / B41 (2.496GHz~2.69GHz) frequency bands, then the feed point needs to be far away from existing WIFI antennas and B40 / B41 frequency band antennas in the electronic device. In addition, the location design of the docking points (first grounding point 34 and second grounding point 35) can be used to keep the resonant current path away from other existing antennas in the electronic device to further reduce interference to other existing antennas in the electronic device.

[0062] In some embodiments, reference Figure 4 , Figure 4 for Figure 3 A schematic diagram showing the electrical length between the feed point and each grounding point of the camera's metal decorative component 30.

[0063] The first grounding point 34 and the feed point 33 have a first electrical length L1. Since the electrical length is affected by factors such as the shape of the conductor and the impedance elements, the electrical length may differ from the physical length of the conductor. That is, the first electrical length L1 may be different from the physical length between the first grounding point 34 and the feed point 33, and the first electrical length L1 is determined by the actual situation. In one possible case, the first electrical length satisfies the following condition:

[0064] L1<0.25*k1*λ

[0065] Where L1 is the first electrical length, k1 is the first distance parameter, 30% > k1 > 0, and λ is the wavelength corresponding to the lowest frequency in the first frequency range. In practical applications, k1 can be set to a suitable value within the range of 0 to 30% based on the input impedance.

[0066] For example, the first frequency range can be 0.6GHz to 1GHz, then the lowest frequency in the first frequency range is 600MHz, λ is the wavelength corresponding to 600MHz, and k1 can be, for example, 22%. Then the condition that L1 satisfies is: L1 < 0.055λ. At this time, the antenna multiplexed by the camera's metal decorative part 30 can have better radiation performance.

[0067] There is a second electrical length L2 between the second grounding point 35 and the feed point 33. Similarly, the second electrical length L2 may differ from the physical length between the second grounding point 35 and the feed point 33; the second electrical length L2 is determined by the actual situation. In one possible case, the second electrical length satisfies the following condition:

[0068] L2>0.25*k2*λ

[0069] Where L2 is the second electrical length, k2 is the second distance parameter, k2>25%, and λ is the wavelength corresponding to the lowest frequency in the first frequency range. In practical applications, k2 can be set to a suitable value within a range greater than 25% based on the input impedance.

[0070] For example, the first frequency range can be 0.6 GHz to 1 GHz, then the lowest frequency in the first frequency range is 600 MHz, λ is the wavelength corresponding to 600 MHz, and k2 can be, for example, 25%. Then the condition that L2 satisfies is: L2 > 0.0625λ. At this time, the interference of the camera metal decorative part 30 to other existing antennas in the electronic device can be reduced, for example, the interference to other antennas operating in the second frequency range can be reduced.

[0071] There is a third electrical length L3 between the third grounding point 36 and the feed point 33. Similarly, the third electrical length L3 may differ from the physical length between the third grounding point 36 and the feed point 33; the third electrical length L3 is determined by the actual situation. In one possible case, the third electrical length satisfies the following condition:

[0072] L3>0.25*k3*λ

[0073] Where L3 is the third electrical length, k3 is the third distance parameter (k3 > 25%), and λ is the wavelength corresponding to the lowest frequency in the first frequency range. In practical applications, k3 can be set to a suitable value within a range greater than 25% based on the input impedance.

[0074] For example, the first frequency range can be 0.6 GHz to 1 GHz, then the lowest frequency in the first frequency range is 600 MHz, λ is the wavelength corresponding to 600 MHz, and k3 can be, for example, 25%. Then the condition that L3 satisfies is: L3 > 0.0625λ. At this time, the interference of the camera metal decorative part 30 to other existing antennas in the electronic device can be reduced, for example, the interference to other antennas operating in the second frequency range can be reduced.

[0075] In some embodiments, reference Figure 5 , Figure 5 This is a schematic diagram of a third structure of the camera metal decorative part 30 provided in an embodiment of this application.

[0076] The metal decorative component body 31 is provided with one or more slots 37, such as Figure 5 The two slots 37 are shown. When there are multiple slots 37, the shape, size, and depth of the multiple slots 37 can be different from each other, or they can be partially or completely the same. The specific settings can be made according to the actual situation.

[0077] Understandably, the slot 37 reduces the weight of the metal decorative component body 31, making the camera metal decorative component 30 lighter overall. The slot 37 can also provide clearance for the placement of other structures or devices, such as sensors or NFC antennas.

[0078] On the other hand, the slot 37 can affect the antenna formed by the reuse of the camera's metal decorative part 30, and this effect has the following two aspects. First, if the slot 37 is located on the current path, it will lengthen the current path, thereby increasing the equivalent electrical length. Second, the slot 37 can also reduce the coupling between the metal decorative part body 31 and the reference ground, improving the antenna clearance and thus improving the antenna efficiency.

[0079] The camera metal decorative piece 30 provided in this application embodiment, by setting a feed point 33, a first ground point 34, and a second ground point 35, enables the metal decorative piece body 31 to resonate within a first frequency range, thereby allowing the camera metal decorative piece 30 to be reused as an antenna to achieve wireless communication functionality. Furthermore, the second ground point 35 forms a short circuit to the second frequency range, thus reducing interference to wireless signals within the second frequency range, thereby reducing interference caused by the camera metal decorative piece 30 to other antennas of the electronic device (antennas operating in the second frequency range). Further, in some embodiments, the camera metal decorative piece 30 also includes a third ground point 36, which also forms a short circuit to the second frequency range, thus further reducing interference caused by the camera metal decorative piece 30 to other antennas of the electronic device.

[0080] This application also provides an antenna device that can be disposed in an electronic device 100 to realize the wireless communication function of the electronic device 100. (See reference...) Figure 6 , Figure 6 This is a schematic diagram of the structure of the antenna device 200 provided in the embodiments of this application.

[0081] The antenna device 200 includes a camera metal decorative element 30, a first feed source 41, a first impedance network 42, and a second impedance network 43. It is understood that in some embodiments, when the camera metal decorative element 30 further includes a third grounding point 36, the antenna device 200 may also include a third impedance network 44. The camera metal decorative element 30 can be referred to the descriptions of the various embodiments above, and will not be repeated here.

[0082] The first feed source 41 is electrically connected to the feed point 33 of the camera metal decorative part 30. The first feed source 41 is used to provide an excitation signal of a first frequency range and feed the excitation signal of the first frequency range into the feed point 33.

[0083] The first impedance network 42 is electrically connected to the first grounding point 34 of the camera metal decorative part 30, and the first impedance network 42 is grounded. For example, the first impedance network 42 can be connected to the reference ground of the electronic device 100 to achieve grounding. The reference ground of the electronic device 100 can be provided on a circuit board, or formed in a metal area such as a metal frame as a reference potential, or formed in a metal component such as a metal shield in the electronic device 100. This application does not specifically limit this.

[0084] The second impedance network 43 is electrically connected to the second ground point 35 of the camera metal trim 30, and the second impedance network 43 is grounded. For example, the second impedance network 43 can be connected to the reference ground of the electronic device 100 to achieve grounding.

[0085] The third impedance network 44 is electrically connected to the third ground point 36 of the camera metal trim 30, and the third impedance network 44 is grounded. For example, the third impedance network 44 can be connected to the reference ground of the electronic device 100 to achieve grounding.

[0086] In some embodiments, the first impedance network 42, the second impedance network 43, and the third impedance network 44 each include multiple parallel impedance matching paths, each impedance matching path including at least one of a capacitor, an inductor, a resistor, and a switch. The following description uses only the first impedance network 42 as an example.

[0087] refer to Figure 7 , Figure 7 This is a schematic diagram of the structure of the first impedance network 42 of the antenna device provided in the embodiments of this application.

[0088] The first impedance network 42 includes multiple parallel impedance matching paths 421. One end of each impedance matching path 421 is electrically connected to the first grounding point 34, and the other end is grounded. Each impedance matching path 421 includes at least one of a capacitor, inductor, resistor, and switch. For example, the impedance matching path 421 can be a switch, a capacitor, an inductor, or a network composed of a capacitor, inductor, and resistor. It should be noted that different impedance matching paths 421 may include different components; that is, the structures of different impedance matching paths 421 may be different, and therefore their impedances may also be different.

[0089] The structures of the second impedance network 43 and the third impedance network 44 can be the same as or similar to the structure of the first impedance network 42, and will not be described in detail here.

[0090] In some embodiments, reference Figure 8 , Figure 8 This diagram illustrates the connection relationship between the antenna device 200 and the circuit board provided in this embodiment. The antenna device 200 further includes a feed spring 51, a first ground spring 52, and a second ground spring 53. It is understood that in some embodiments, when the antenna device 200 includes a third impedance network 44, it may further include a third ground spring 54. The feed spring 51, the first ground spring 52, the second ground spring 53, and the third ground spring 54 can all be made of metal and have good conductivity; for example, they can be made of copper, aluminum, or silver-plated materials.

[0091] The electronic device 100 includes a circuit board 60 on which various circuits and circuit modules can be disposed. For example, the first feed source 41, the first impedance network 42, the second impedance network 43, and the third impedance network 44 described above can all be disposed on the circuit board 60. In some embodiments, a second feed source can also be disposed on the circuit board 60. The second feed source is used to provide the excitation signal in the third frequency range described above, wherein the second feed source is electrically connected to the third ground point 36 so that the excitation signal in the third frequency range is fed into the second feed source through the third ground point 36.

[0092] Specifically, the power feed spring 51 abuts against the feed point 33 and is electrically connected to the first feed source 41 on the circuit board 60, thereby connecting the first feed source 41 to the feed point 33. The first ground spring 52 abuts against the first ground point 34 and is electrically connected to the first impedance network 42 on the circuit board 60, thereby connecting the first impedance network 42 to the first ground point 34. The second ground spring 53 abuts against the second ground point 35 and is electrically connected to the second impedance network 43 on the circuit board 60, thereby connecting the second impedance network 43 to the second ground point 35. The third ground spring 54 abuts against the third ground point 36 and is electrically connected to the third impedance network 44 on the circuit board 60, thereby connecting the third impedance network 44 to the third ground point 36.

[0093] The antenna efficiency of the antenna device 200 in this application embodiment will be explained below through different grounding conditions of the first grounding point 34, the second grounding point 35, and the third grounding point 36.

[0094] In practical applications, the dimensions of the electronic device 100 and the metal decorative part 30 of the camera can vary. This application embodiment provides examples based on specific dimensions. In one possible scenario, the long side of the electronic device 100 is 165mm, the short side is 75mm, and the length and width of the metal decorative part body 31 are both 45mm. In this case, the metal decorative part body 31 is generally square, with the distance between the feed point 33 and the first ground point 34 being 24mm, and the distance between the feed point 33 and the second ground point 35 being 32mm. The position of the third ground point 36 can be set according to the frequency range of interference to be reduced (e.g., the specific frequency of the second frequency range mentioned above). For different frequency ranges of interference to be reduced, its position can be different, therefore it is not limited here. In this case, the first ground point 34, the second ground point 35, and the third ground point 36 have the following four grounding situations as shown in Table 1:

[0095] Table 1

[0096] First grounding point 34 N / A GND N / A GND Second grounding point 35 N / A GND GND N / A Third grounding point 36 N / A GND N / A N / A

[0097] GND indicates an equivalent short circuit, i.e., grounding, while N / A indicates an equivalent open circuit.

[0098] The antenna efficiency under the four grounding conditions described above is shown in Table 2 below:

[0099] Table 2

[0100] 0.61GHz~0.7GHz -13.4 -21.9 -20.3 -8.4 35MHz -10.4 -20.9 -19.5 -8.0

[0101] In case A, the excitation signal within a first frequency range is fed into feed point 33, for example, 0.6 GHz to 1 GHz. This 0.6 GHz to 1 GHz can be understood as the target operating frequency. First ground point 34, second ground point 35, and third ground point 36 are all equivalent to open circuits. The input impedance at this time is as follows: Figure 9 As shown, Figure 9 This is a schematic diagram of the first Z-parameter of the antenna device 200 provided in an embodiment of this application, where curve S1 represents the real impedance and curve S2 represents the imaginary impedance. Figure 9 It can be seen that there are no obvious modes within the target operating frequency range (0.6GHz to 1GHz) or within 200MHz of it, except near 0GHz, which is about 500MHz away from the target operating frequency of 0.6GHz (i.e., Figure 9 There is a mode with relatively high impedance (located near the vertical axis). Through matching circuit design at the feed end, this mode can be designed to resonate in the low-frequency band. However, this mode is more than 500MHz away from the target operating frequency of 0.6GHz. Due to the large deviation from the target operating frequency and the relatively drastic input impedance, both the peak and average antenna efficiency within this mode are relatively poor. The antenna efficiency is shown in Table 2.

[0102] It's important to note that the input impedance needs to be designed with a balance between the real and imaginary impedances to achieve good antenna resonance. For example, if the imaginary part is zero, a real part of approximately 17-150 ohms is required for good resonance (e.g., 75% transmission and 25% reflection). Of course, even if the real and imaginary impedances are relatively high (exceeding ±500 ohms), they can be smoothed out (below ±500 ohms) by adding series capacitors or other classic matching circuits. Further improvements can be made by using classic matching circuits such as low-pass / high-pass / band-pass / band-stop / band-blocking circuits to better match the impedance and shift the resonant mode to the desired frequency position, either higher or lower. However, adding more matching components will increase losses. If a relatively smooth mode can be achieved near the desired operating frequency band, the final antenna design will typically exhibit better peak and average efficiency (because fewer components can be used).

[0103] In case B, the excitation signal within a first frequency range is fed into feed point 33, for example, 0.6GHz to 1GHz. This 0.6GHz to 1GHz range can be understood as the target operating frequency. First ground point 34, second ground point 35, and third ground point 36 are all equivalent to short circuits, i.e., equivalent to grounding. The input impedance at this time is as follows: Figure 10 As shown, Figure 10This is a schematic diagram of the second Z-parameter of the antenna device 200 provided in this application embodiment, where curve S3 represents the real impedance and curve S4 represents the imaginary impedance. Because the maximum size of the metal decorative component body 31 is relatively shortened due to disruption by multiple grounding points, there are no suitable modes within the required low-frequency operating band (0.6GHz to 1GHz) or even within the adjacent band of 1000MHz. Even if the antenna is designed with a matching circuit to meet the return loss, its radiation efficiency is inherently poor (due to the lack of suitable input impedance), and the peak and average antenna efficiency will be worse than in case A.

[0104] In case C, the excitation signal within a first frequency range is fed into feed point 33, for example, 0.6GHz to 1GHz. This 0.6GHz to 1GHz range can be understood as the target operating frequency. The second ground point 35 is equivalent to a short circuit, i.e., equivalent to ground. The first ground point 34 and the third ground point 36 are both equivalent to open circuits. The input impedance at this time is as follows: Figure 11 As shown, Figure 11 This is a schematic diagram of a third Z-parameter of the antenna device 200 provided in an embodiment of this application. Figure 11 It can be seen that although it has a resonant mode in the required operating frequency band (0.6GHz to 1GHz), its real impedance is between 0 and 76 ohms and its imaginary impedance is between -12 and 50 ohms. Its overall impedance is relatively flat and it is difficult to achieve good impedance matching. Therefore, its peak and average antenna efficiency will be worse than that of case A.

[0105] In case D, the excitation signal within a first frequency range is fed into feed point 33, for example, 0.6 GHz to 1 GHz. This 0.6 GHz to 1 GHz range can be understood as the target operating frequency. The first ground point 34 is equivalent to a short circuit, i.e., equivalent to ground. The second ground point 35 and the third ground point 36 are both equivalent to open circuits. The input impedance at this time is as follows: Figure 12 As shown, Figure 12 This is a schematic diagram of the fourth Z-parameter of the antenna device 200 provided in an embodiment of this application. (Through...) Figure 12 It can be seen that although its resonant mode does not fall entirely within the required operating frequency band (0.6GHz~1GHz), it is relatively close. Often, due to limitations in the design location of the grounding point, even if a relatively good input impedance can be obtained, it may not necessarily fall entirely within the operating frequency band. However, its input impedance, both real and imaginary, is within ±300 ohms, which makes the impedance matching circuit relatively simple and reduces insertion loss. Therefore, its peak and average antenna efficiency will be better than in case A.

[0106] In summary, for cases A through D, in practical applications, for example, the resonant mode of the first frequency range can be designed in the B71 band of 4G LTE (uplink 663MHz~697.9MHz, downlink 617MHz~651.9MHz). The peak and average antenna efficiency values ​​can be found in Table 2. As can be seen from this, in the embodiments of this application, the first grounding point 34 is designed to form a short circuit for the first frequency range, while the second grounding point 35 and the third grounding point 36 are both designed to form an open circuit for the first frequency range. That is, as in the design of case D above, the camera metal decorative part 30 can have a good resonant mode in the required low frequency band (e.g., 0.6GHz to 1GHz). Furthermore, the second grounding point 35 and the third grounding point 36 are both designed to form a short circuit for the second frequency range (e.g., a frequency range greater than 1GHz). Therefore, the equivalent electrical length of the induced current generated on the camera metal decorative part 30 by other antennas in the electronic device (e.g., antennas operating in the second frequency range) is relatively reduced, so that the interference mode falls at a relatively high frequency (e.g., within the second frequency range) and not in the required operating frequency band (e.g., 0.6GHz to 1GHz).

[0107] In one possible scenario, when the metal decorative element body 31 is provided with one or more slots 37, for example... Figure 5 The antenna efficiency when two slots 37 are set up is compared with that of case A in Table 3 below:

[0108] Table 3

[0109] 0.61GHz~0.7GHz -13.4 -10.7 35MHz -10.4 -9.5

[0110] In case E, the setup of feed point 33, first ground point 34, second ground point 35, and third ground point 36 is the same as in case A. Specifically, feed point 33 receives the excitation signal within the first frequency range, and the first ground point 34, second ground point 35, and third ground point 36 are all equivalent to open circuits. The difference lies in the presence of two slots 37 on the metal decorative body 31 in case E. As shown in Table 3, the antenna efficiency in case E is improved compared to case A. Therefore, the antenna efficiency can be improved after setting the slots 37.

[0111] In the description of this application, it should be understood that terms such as “first” and “second” are used only to distinguish similar objects and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0112] The camera metal decorative part, antenna device, and electronic device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application, and the descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A metal decorative component for a camera, characterized in that, include: Metal decorative component body; A feed point is provided on the metal decorative part body, and the feed point is used to feed in an excitation signal in a first frequency range; The excitation signal in the first frequency range is a low-frequency excitation signal, and the maximum size of the metal decorative part body is less than one-quarter of the wavelength corresponding to the first frequency range; A first grounding point is provided on the metal decorative part body. The first grounding point is used to ground through a first impedance network so that the first grounding point forms a short circuit with respect to the first frequency range, so that the metal decorative part body generates resonance in the first frequency range. The second grounding point is disposed on the metal decorative part body. The second grounding point is used to ground through the second impedance network so that the second grounding point forms an open circuit with respect to the first frequency range and a short circuit with respect to the second frequency range, so that the excitation signal of the first frequency range forms a current path between the feed point and the first grounding point. Wherein, the second frequency range is different from the first frequency range; There is a first electrical length between the first grounding point and the feed point, and the first electrical length satisfies the following condition: L1 < 0.25 * k1 * λ; Where L1 is the first electrical length, k1 is the first distance parameter, 30%>k1>0, and λ is the wavelength corresponding to the lowest frequency in the first frequency range.

2. The camera metal decorative component according to claim 1, characterized in that, There is a second electrical length between the second grounding point and the feed point, and the second electrical length satisfies the following condition: L2>0.25*k2*λ; Where L2 is the second electrical length, k2 is the second distance parameter, k2>25%, and λ is the wavelength corresponding to the lowest frequency in the first frequency range.

3. The camera metal decorative component according to claim 1 or 2, characterized in that, It also includes a third grounding point, which is disposed on the metal decorative part body. The third grounding point is used to ground through a third impedance network so that the third grounding point forms an open circuit with respect to the first frequency range and a short circuit with respect to the second frequency range.

4. The camera metal decorative part according to claim 3, characterized in that, There is a third electrical length between the third grounding point and the feed point, and the third electrical length satisfies the following condition: L3>0.25*k3*λ; Wherein, L3 is the third electrical length, k3 is the third distance parameter, k3>25%, and λ is the wavelength corresponding to the lowest frequency in the first frequency range.

5. The camera metal decorative part according to claim 3, characterized in that: One of the second grounding point and the third grounding point is also used to feed in an excitation signal in a third frequency range, which is different from both the first frequency range and the second frequency range. The second grounding point and the other of the third grounding points form a short circuit with respect to the third frequency range, so that the metal decorative body resonates in the third frequency range.

6. The camera metal decorative part according to claim 1 or 2, characterized in that: The feed point is also used to feed in an excitation signal in the second frequency range so that the metal decorative body resonates in the second frequency range.

7. The camera metal decorative part according to claim 1 or 2, characterized in that: The feed point is also used to feed in an excitation signal in a fourth frequency range, which is different from both the first and second frequency ranges. The first grounding point forms a short circuit with respect to the fourth frequency range, so that the metal decorative body resonates within the fourth frequency range.

8. The camera metal decorative part according to claim 1 or 2, characterized in that, The first frequency range is 0.6 GHz to 1 GHz, and the second frequency range is greater than 1 GHz.

9. The camera metal decorative piece according to claim 1 or 2, characterized in that, The metal decorative component body is provided with one or more slots.

10. The camera metal decorative piece according to claim 1 or 2, characterized in that, The metal decorative component has a through hole for mounting a camera.

11. An antenna device, characterized in that, include: The camera metal decorative piece as described in any one of claims 1 to 10; The first feed source is electrically connected to the feed point of the metal decorative part of the camera, and the first feed source is used to feed an excitation signal of a first frequency range to the feed point. A first impedance network is electrically connected to a first grounding point of the metal decorative part of the camera, and the first impedance network is grounded. The second impedance network is electrically connected to the second grounding point of the camera's metal decorative component, and the second impedance network is grounded.

12. The antenna device according to claim 11, characterized in that, Also includes: A feed spring contacts the feed point and is electrically connected to the first feed source; The first grounding spring contacts the first grounding point and is electrically connected to the first impedance network. The second grounding spring contacts the second grounding point and is electrically connected to the second impedance network.

13. The antenna device according to claim 11, characterized in that, Both the first impedance network and the second impedance network include multiple parallel impedance matching paths, and each impedance matching path includes at least one of a capacitor, an inductor, a resistor, and a switch.

14. An electronic device, characterized in that, include: Camera; A camera metal decorative piece is installed on the camera, wherein the camera metal decorative piece is the camera metal decorative piece according to any one of claims 1 to 10.

Images