Antenna assembly and terminal device
By introducing a band-stop resonant structure into electronic devices, the problem of antenna coupling interference is solved, the isolation is improved, and the antenna efficiency is optimized. The structure is simple and low in cost.
Patent Information
- Application Number
- CN202520126987.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-17
AI Technical Summary
In electronic devices, the antennas are densely distributed and the isolation between adjacent antennas is poor, which leads to coupling interference and reduced efficiency.
A band-stop resonant structure, including bent leads or bent slits, is placed between adjacent antennas, which is equivalent to an inductor and a capacitor connected in parallel, thus blocking the flow of current.
It improves the isolation between antennas, optimizes the isolation of antennas in the same frequency, reduces coupling interference, simplifies the structure, and reduces costs.
Smart Images
Figure CN223757693U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to communication field especially relates to a kind of antenna assembly and terminal equipment. BACKGROUND
[0002] Antennas in electronic equipment are distributed densely, and are prone to coupling interference, especially between adjacent antennas and the same frequency band, with poor isolation, thus reducing antenna efficiency. SUMMARY
[0003] Embodiments of the utility model provide antenna assembly and terminal equipment.
[0004] According to the first aspect of the embodiments of the utility model, an antenna assembly applied to a terminal device is provided, comprising: a first antenna radiator, sequentially comprising a first feed point and a first ground point along a length direction, the first feed point being electrically connected to a first feed source, and the first ground point being grounded; a second antenna radiator, sequentially comprising a second ground point and a second feed point along the length direction, the second feed point being electrically connected to a second feed source, the second ground point being grounded, and the second ground point being adjacent to the first ground point in the length direction; a band-stop resonant structure located between the first antenna radiator and the second antenna radiator, and configured to be equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between the first antenna radiator and the second antenna radiator.
[0005] Optionally, the band-stop resonant structure is configured to block the current of a target frequency band on the first antenna radiator from flowing to the second antenna radiator, and to block the current of the target frequency band on the second antenna radiator from flowing to the first antenna radiator.
[0006] Optionally, the antenna assembly comprises a first region, a third region and a second region arranged in sequence along the length direction, the first antenna radiator is located in the first region and has a first width in a width direction perpendicular to the length direction, the second antenna radiator is located in the second region and has a second width in the width direction, the third region is configured with a common ground region, the common ground region has a third width in the width direction, the third width is smaller than the first width, and the third width is smaller than the second width, two ends of the common ground region are connected with the first region and the second region respectively, the first ground point and the second ground point are located in the common ground region, and the band-stop resonant structure is located in the third region and connected with the common ground region.
[0007] Optionally, the band reject resonant structure comprises a meandered trace having one end connected to the common ground region and the other end hanging in the air, the meandered trace extending in the third region beyond the common ground region.
[0008] Optionally, the meandered trace comprises at least one first trace extending in the width direction and at least one second trace extending in the length direction, the at least one first trace and the at least one second trace being staggered and connected end to end to form the meandered trace.
[0009] Optionally, the meandered trace is connected to a trace contact of the common ground region by a first trace, the first contact and the second contact being arranged on the same side of the trace contact in the length direction.
[0010] Optionally, the first antenna radiator and the second antenna radiator are adapted for the same radio frequency, the radio frequency belonging to the target frequency band, and a total length of the meandered trace is substantially one quarter of a wavelength corresponding to the radio frequency.
[0011] Optionally, the band reject resonant structure comprises radiator regions integrally formed with the first antenna radiator and the second antenna radiator respectively and separated by a meandered slot, the meandered slot extending from one side to the other side in the width direction and comprising at least two first slots extending in the width direction perpendicular to the length direction and at least one second slot extending in the length direction, the at least two first slots and the at least one second slot being staggered and connected end to end to form the meandered slot.
[0012] Optionally, a length of the at least one second slot is configured based on a desired inductance value of an equivalent inductor of the band reject resonant structure, and a width of each of the at least two first slots and the at least one second slot is configured based on a desired capacitance value of an equivalent capacitor of the band reject resonant structure.
[0013] According to a second aspect of the embodiments of the present application, a terminal device is provided, comprising: the antenna assembly according to the first aspect of the embodiments of the present application, the antenna assembly being arranged at a frame position of the terminal device, the length direction being a frame extension direction of the terminal device, and the width direction perpendicular to the length direction being a thickness direction of the terminal device. BRIEF DESCRIPTION OF DRAWINGS
[0014] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like elements throughout the figures, and in which:
[0015] Figure 1 An exemplary structure diagram of an antenna assembly applied to a terminal device according to at least one embodiment of the present application is shown.
[0016] Figure 2 An exemplary structure of a bent lead and an equivalent circuit diagram thereof are shown.
[0017] Figure 3 An exemplary structure diagram of an antenna assembly without a band-stop resonant structure is shown.
[0018] Figure 4 An exemplary structure diagram of an antenna assembly is shown. Figure 1 , Figure 3 An exemplary S-parameter simulation result diagram of the two structures of the antenna assembly is shown.
[0019] Figure 5 An exemplary current distribution simulation result diagram when a first antenna radiator port is excited in the two structures of the antenna assembly is shown. Figure 1 Figure 3
[0020] Figure 6 An exemplary structure diagram of an antenna assembly applied to a terminal device according to at least another embodiment of the present application is shown.
[0021] Figure 7 An exemplary structure of a bent slot and an equivalent circuit diagram thereof are shown.
[0022] Figure 8 Another exemplary structure diagram of a bent slot is shown. DETAILED DESCRIPTION
[0023] Preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.
[0024] Those skilled in the art will understand that the terms "first", "second", and the like in the present application are used to distinguish similar objects, and are not intended to describe a particular order or sequence, and there is no additional limitation.
[0025] The utility model provides a kind of antenna assembly applied to terminal equipment.The antenna assembly includes two antenna radiators and the band-stop resonant structure being arranged between two antenna radiators (such as intermediate position), and the band-stop resonant structure is used to block the current on one antenna radiator to flow to another antenna radiator.So the isolation between two antenna radiators can be improved.
[0026] The terminal equipment can be any device with antenna structure (such as at least two antennas), for example, it can be but not limited to mobile phone, tablet computer, wearable device, vehicle-mounted device, augmented reality (AR) / virtual reality (VR) device, notebook computer, ultra-mobile personal computer (UMPC), netbook, personal digital assistant (PDA), Internet of Things device, smart television and other terminal equipment.The specific type of terminal equipment is not limited in the embodiment of the present disclosure.
[0027] For example, the terminal equipment can be a station (STATION, ST) in WLAN (Wireless Local Area Network), can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a computer, a laptop, a handheld communication device, a handheld computing device, and / or other devices for communicating over a wireless system and next-generation communication systems, such as a mobile terminal in a 5G (the Fifth Generation mobile communication technology) network, a mobile terminal in a future evolved public land mobile network (PLMN), or a mobile terminal in a future evolved non-terrestrial network (NTN), etc.
[0028] As an example but not limitation, when the terminal device is a wearable device, the wearable device can also be a general term of application of wearable technology to the intelligent design of daily wear, and the development of wearable devices, such as gloves, watches, etc. configured with a near field communication module. The wearable device is a portable device directly worn on the body, or integrated into the user's clothes or accessories, which performs payment, authentication, etc. through the pre-bound electronic card attached to the user. The wearable device is not only a hardware device, but also a powerful function through software support and data interaction, cloud interaction. The general wearable smart device includes a full function, large size, and can realize complete or partial functions without relying on a smart phone, such as a smart watch or smart glasses, etc., and only focuses on a certain application function, and needs to cooperate with other devices such as a smart phone, such as various smart watches with display screens, smart bracelets, etc.
[0029] Figure 1 An exemplary structure diagram of an antenna assembly applied to a terminal device according to at least one embodiment of the present application is shown. Figure 1 The three views shown in the figure are structure diagrams of the antenna assembly at different viewing angles.
[0030] Referring to Figure 1 The antenna assembly includes a first antenna radiator P1, a second antenna radiator P2, and a band-stop resonant structure B.
[0031] The first antenna radiator P1 includes a first feed point F1 and a first ground point in sequence along the length direction. The first feed point F1 is electrically connected to a first feed source, and the first ground point is grounded. The second antenna radiator P2 includes a second ground point and a second feed point F2 in sequence along the length direction. The second feed point F2 is electrically connected to a second feed source, and the second ground point is grounded, and the second ground point is adjacent to the first ground point in the length direction. S1 is an open-end gap of the first antenna radiator P1, and S2 is an open-end gap of the second antenna radiator P2.
[0032] The band-stop resonant structure B is located between the first antenna radiator P1 and the second antenna radiator P2, and is configured to be equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between the first antenna radiator P1 and the second antenna radiator P2.
[0033] The band-stop resonant structure can be configured to block the current of the target frequency band on the first antenna radiator P1 from flowing to the second antenna radiator P2, and block the current of the target frequency band on the second antenna radiator P2 from flowing to the first antenna radiator P1.
[0034] In some example embodiments, the antenna assembly can include a first region, a third region and a second region arranged in sequence along a length direction. A first antenna radiator P1 is located in the first region and has a first width in a width direction perpendicular to the length direction. A second antenna radiator P2 is located in the second region and has a second width in the width direction. The third region is configured with a common ground region G having a third width in the width direction, the third width being smaller than the first width and the third width being smaller than the second width. The first width can be equal to or different from the second width. The common ground region G is connected to the first region and the second region at two ends thereof respectively, and a first ground point and a second ground point are located in the common ground region G. A band-stop resonant structure B is located in the third region and connected to the common ground region G. The common ground region G can further include a third ground point arranged between the first ground point and the second ground point.
[0035] In some example embodiments, the band-stop resonant structure B can include a bent lead line having one end connected to the common ground region G and the other end hanging. The bent lead line extends in a region outside the common ground region G in the third region. In this way, a real inductor and a capacitor are not required to be arranged, and only a simple bent lead line is required to be equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between the first antenna radiator P1 and the second antenna radiator P2, thereby improving the isolation between the first antenna radiator P1 and the second antenna radiator P2. In the present utility model, the term “lead line” can be regarded as the same or similar concept as the term “wire”, and therefore, “lead line” can also be replaced by “wire”.
[0036] The bent lead line includes at least one first lead line extending along the width direction and at least one second lead line extending along the length direction. The at least one first lead line and the at least one second lead line are arranged alternately and connected end to end to form the bent lead line. The bent lead line can be connected to a lead line junction of the common ground region G through a first lead line (for example, the last first lead line located at the tail). The first ground point and the second ground point can be arranged on the same side of the lead line junction in the length direction.
[0037] Figure 2 The structure of the bent lead line and its equivalent circuit schematic diagram are shown exemplarily.
[0038] As shown in Figure 2 The bent lead line can be a “bow” shaped lead line. That is, the bent lead line can include three first lead lines extending along the width direction and three second lead lines extending along the length direction, the three first lead lines and the three second lead lines being connected end to end to form a “bow” shaped lead line. The bent lead line can be connected to a lead line junction of the common ground region through a first lead line at the tail. The lead line junction can be arranged close to one side of the common ground region G in the length direction.
[0039] The equivalent circuit of the bending lead wire is equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between the first antenna radiator P1 (port 1 shown in the figure) and the second antenna radiator P2 (port 2 shown in the figure).
[0040] In some example embodiments, the first antenna radiator P1 and the second antenna radiator P2 are suitable for the same radio wave frequency belonging to a target frequency band, and the total length of the bending lead wire is substantially one quarter of the wavelength corresponding to the radio wave frequency. In this way, the isolation of the same frequency antenna can be better optimized.
[0041] In some example embodiments, the common ground position can be connected to ground through the three capacitors C1, C2 and C3, so as to achieve the function of considering the SAR (Specific Absorption Rate) detection.
[0042] Figure 3 The structural schematic diagram of the antenna assembly without the band-stop resonant structure is shown.
[0043] Figure 3 The difference between the antenna assembly shown in Figure 1 and the antenna assembly shown in Figure 3 is that the antenna assembly shown in does not set the band-stop resonant structure B between the first antenna radiator P1 and the second antenna radiator P2.
[0044] Figure 4 The S parameter simulation result schematic diagram of the two structures of the antenna assembly shown in Figure 1 and Figure 3 is shown.
[0045] Figure 4 The upper view in the middle is the S parameter simulation result schematic diagram of the structure without setting the band-stop resonant structure B between the first antenna radiator P1 and the second antenna radiator P2 (i.e. the structure shown in Figure 3 ).
[0046] Figure 4 The lower view in the middle is the S parameter simulation result schematic diagram of the structure with setting the band-stop resonant structure B between the first antenna radiator P1 and the second antenna radiator P2 (i.e. the structure shown in Figure 1 ).
[0047] As shown in Figure 4 , the isolation when the band-stop resonant structure B is not set between the first antenna radiator P1 and the second antenna radiator P2 is only -5.95db, and the isolation after the band-stop resonant structure B is added between the first antenna radiator P1 and the second antenna radiator P2 is -11.78db. The isolation is improved by nearly 6db, which shows the effectiveness of the utility model.
[0048] Figure 5 The current distribution simulation results of the first antenna radiator port excitation in the two-structure antenna assembly are shown. Figure 1 、 Figure 3 The current distribution simulation results of the first antenna radiator port excitation in the two-structure antenna assembly are shown. Figure 5 The upper view in the middle is a schematic diagram of the current distribution simulation results of the first antenna radiator port excitation when no band-stop resonant structure B (i.e. Figure 3 The structure shown) is arranged between the first antenna radiator P1 and the second antenna radiator P2. Figure 5 The lower view in the middle is a schematic diagram of the current distribution simulation results of the first antenna radiator port excitation when the band-stop resonant structure B (i.e. Figure 1 The structure shown) is arranged between the first antenna radiator P1 and the second antenna radiator P2.
[0049] As shown in Figure 5 , when no band-stop resonant structure B is arranged between the first antenna radiator P1 and the second antenna radiator P2, there is more current flowing from the first antenna radiator P1 to the second antenna radiator P2. After the band-stop resonant structure B is added between the first antenna radiator P1 and the second antenna radiator P2, only a small part of the current flowing from the first antenna radiator P1 to the second antenna radiator P2. It can be seen that the utility model can effectively prevent the current flowing from one antenna radiator to another antenna radiator.
[0050] Figure 6 Exemplarily shown is a structural schematic diagram of an antenna assembly applied to a terminal device according to at least another embodiment of the utility model. Figure 6 The three views shown in the middle are structural schematic diagrams of the antenna assembly under different viewing angles.
[0051] Different from the structure of the antenna assembly shown in Figure 1 , in the embodiment, the band-stop resonant structure comprises radiator regions integrally formed with the first antenna radiator P1 and the second antenna radiator P2 respectively and separated by a bending slot. That is, the radiator regions integrally formed with the first antenna radiator P1 and the second antenna radiator P2 respectively and separated by a bending slot can be used as the band-stop resonant structure. The radiator region can be regarded as a region formed by the radiator around the bending slot.
[0052] The bending slot extends from one side to the other side in the width direction perpendicular to the length direction. The bending slot comprises at least two first slots extending in the width direction and at least one second slot extending in the length direction. The at least two first slots and the at least one second slot are arranged alternately and connected end to end, forming the bending slot.
[0053] Figure 7 An exemplary structure of the meandered slot and its equivalent circuit schematic diagram are shown.
[0054] As shown in the drawings, Figure 7 The meandered slot can include two first slots extending along a width direction and one second slot extending along a length direction. The equivalent circuit of the meandered slot is equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between a first antenna radiator P1 (port 1 shown in the drawings) and a second antenna radiator P2 (port 2 shown in the drawings).
[0055] As shown in the drawings, Figure 6 The width dimensions w1, w2, w3 of the three slots constituting the meandered slot can be used to adjust the equivalent capacitance c, and the length dimension L1 of the second slot can be used to adjust the equivalent inductance L. That is, the width of the first slot and the second slot and the length of the second slot can be configured according to the desired inductance value of the equivalent inductor and the desired capacitance value of the equivalent capacitor.
[0056] The present application does not limit the specific number of the first slot and the second slot included in the meandered slot. Figure 8 Another exemplary structure of the meandered slot is shown. Figure 8 As shown in the drawings, The meandered slot can also include three first slots extending along a width direction and two second slots extending along a length direction.
[0057] The antenna assembly proposed in the present application can place two same-frequency antennas adjacent to each other to save layout space, and the antennas can share an antenna radiator. The isolation degree of the same-frequency antennas is optimized by setting a band-stop structure in the middle position of the two antennas. The overall structure has simple process, low cost, and good reliability, and does not require additional structural cost, such as not requiring additional setting of real inductors and capacitors.
[0058] The present application also proposes a terminal device. The terminal device includes the antenna assembly described above. The length direction described above is the extension direction of the frame of the terminal device, and the width direction described above is the thickness direction of the terminal device.
[0059] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles, practical application, or improvement of technology in the market of the embodiments, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.
Claims
1. An antenna assembly for application to a terminal device, characterized by Comprising: a first antenna radiator comprising a first feeding point and a first grounding point in sequence along a length direction, the first feeding point being electrically connected to a first feeding source, and the first grounding point being grounded; a second antenna radiator comprising a second grounding point and a second feeding point in sequence along the length direction, the second feeding point being electrically connected to a second feeding source, and the second grounding point being grounded, and the second grounding point being adjacent to the first grounding point in the length direction; a band-stop resonant structure located between the first antenna radiator and the second antenna radiator, and configured to be equivalent to an equivalent inductor and an equivalent capacitor connected in parallel between the first antenna radiator and the second antenna radiator.
2. The antenna assembly according to claim 1, wherein: the band-stop resonant structure is configured to block a current of a target frequency band on the first antenna radiator from flowing to the second antenna radiator, and to block a current of the target frequency band on the second antenna radiator from flowing to the first antenna radiator.
3. The antenna assembly according to claim 2, wherein: the antenna assembly comprises a first region, a third region, and a second region arranged in sequence along the length direction, the first antenna radiator is located in the first region and has a first width in a width direction perpendicular to the length direction, the second antenna radiator is located in the second region and has a second width in the width direction, the third region is configured with a common grounding region having a third width in the width direction, the third width being smaller than the first width, and the third width being smaller than the second width, two ends of the common grounding region are connected to the first region and the second region respectively, and the first grounding point and the second grounding point are located in the common grounding region, the band-stop resonant structure is located in the third region and connected to the common grounding region.
4. The antenna assembly of claim 3, wherein, the band-stop resonant structure comprises a bent lead line having one end connected to the common grounding region and the other end hanging freely, and the bent lead line extends in a region of the third region other than the common grounding region.
5. The antenna assembly according to claim 4, wherein: the bent lead line comprises at least one first lead line extending along the width direction and at least one second lead line extending along the length direction, and the at least one first lead line and the at least one second lead line are arranged alternately and connected end to end to form the bent lead line.
6. The antenna assembly according to claim 5, wherein: the bent lead line is connected to a lead line connection point of the common grounding region through a first lead line, the first grounding point and the second grounding point are arranged on the same side of the lead line connection point in the length direction.
7. The antenna assembly according to claim 4, wherein: the first antenna radiator and the second antenna radiator are adapted to the same radio wave frequency, and the radio wave frequency belongs to the target frequency band, a total length of the bent lead line is one quarter of a wavelength corresponding to the radio wave frequency. 8.The antenna assembly of claim 1, wherein, the band rejection resonant structure comprises radiator regions integrally formed with the first and second antenna radiators, respectively, and separated by a meandered slit, the meandered slit, which extends from one side to the other side in a width direction perpendicular to the length direction, comprises at least two first slits extending in the width direction and at least one second slit extending in the length direction, the at least two first slits and the at least one second slit being arranged alternately and connected end to end to form the meandered slit. 9.The antenna assembly of claim 8, wherein, a length of the at least one second slit is configured based on a desired inductance value of an equivalent inductor of the band rejection resonant structure; a width of each of the at least two first slits and the at least one second slit is configured based on a desired capacitance value of an equivalent capacitor of the band rejection resonant structure.
10. A terminal device, comprising: including: the antenna assembly of any one of claims 1-9, the antenna assembly is arranged at a bezel position of the terminal device, the length direction is a direction in which the bezel of the terminal device extends, and a width direction perpendicular to the length direction is a thickness direction of the terminal device.