Multi-frequency antenna and electronic device

Abstract

The present disclosure relates to the technical field of antennas, and particularly relates to a multi-frequency antenna and an electronic device. The multi-frequency antenna comprises a first metal segment, a second metal segment, a band-stop filter and a feed source. The second metal segment is arranged in a spaced manner with the first metal segment. The band-stop filter is connected at one end to an end point of the first metal segment close to the second metal segment, and is connected at the other end to an end point of the second metal segment close to the first metal segment. The feed source is connected to the first metal segment or the second metal segment. The technical scheme of the embodiment of the present disclosure saves the space for designing multiple antenna branches.

Description

Technical Field

[0001] This disclosure relates to the field of antenna technology, and more specifically, to a multi-frequency antenna and electronic device. Background Technology

[0002] In most current plastic-framed watches, the antenna design involves either creating LDS (Laser Direct Structuring) metal branches on the plastic frame or designing the antenna on an FPC (Flexible Printed Circuit) with a metal layer and then attaching it inside the plastic frame.

[0003] Based on existing technology, when designing dual-band / multi-band antennas, it is necessary to design multiple metal stubs according to the required frequency band, which greatly increases the design space of the antenna.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this disclosure is to provide a multi-frequency antenna and electronic device that, at least to some extent, simplifies the design space when designing dual-frequency / multi-frequency antennas.

[0006] According to a first aspect of this disclosure, a multi-frequency antenna is provided, comprising:

[0007] First metal segment;

[0008] The second metal segment is spaced apart from the first metal segment;

[0009] A band-stop filter, one end of which is connected to the end of the first metal segment near the second metal segment, and the other end of which is connected to the end of the second metal segment near the first metal segment;

[0010] The feed source is connected to either the first metal segment or the second metal segment.

[0011] According to a second aspect of this disclosure, a multi-frequency antenna is provided, comprising:

[0012] Multiple antenna metal segments are arranged in parallel and their projections in the second direction have no overlapping areas, so that multiple gaps are formed between the multiple antenna metal segments.

[0013] Multiple band-stop filters are respectively disposed in multiple gaps, and each of the band-stop filters is connected between any two adjacent antenna metal segments;

[0014] The feed source is connected to one of the antenna metal segments.

[0015] According to a third aspect of this disclosure, an electronic device is provided, characterized in that it comprises:

[0016] The multi-frequency antenna described above.

[0017] One embodiment of this disclosure provides a multi-frequency antenna, including a first metal segment, a second metal segment, a band-stop filter, and a feed source. The second metal segment is spaced apart from the first metal segment. One end of the band-stop filter is connected to the endpoint of the first metal segment near the second metal segment, and the other end is connected to the endpoint of the second metal segment near the first metal segment. The feed source is connected to either the first metal segment or the second metal segment. Compared to existing technologies, using a band-stop filter allows currents of different frequency bands to exhibit different on / off states at the filter location, enabling multiple resonant states to be generated on a single antenna stub. This saves space compared to conventional FPC antennas or LDS antennas by eliminating the need to design multiple antenna stubs.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0020] Figure 1 This schematic diagram illustrates the structure of a multi-frequency antenna according to an exemplary embodiment of the present disclosure;

[0021] Figure 2 This diagram illustrates the structure of a multi-frequency antenna with a refined band-stop filter, applicable to embodiments of this disclosure.

[0022] Figure 3 This schematic diagram illustrates the structure of a band-stop filter in an exemplary embodiment of the present disclosure.

[0023] Figure 4 This schematic diagram illustrates the impedance variation of a band-stop filter in an exemplary embodiment of the present disclosure.

[0024] Figure 5 This schematic diagram illustrates the structure of a multi-frequency antenna with a refined band-stop filter in an exemplary embodiment of the present disclosure.

[0025] Figure 6The schematic diagram illustrates a three-dimensional structure of a multi-frequency antenna in an exemplary embodiment of the present disclosure;

[0026] Figure 7 The schematic diagram illustrates the structure of an electronic device in an exemplary embodiment of the present disclosure. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0028] When using LDS or FPC to design multi-band antennas in related technologies, stubs of appropriate length need to be designed according to the required frequency bands to meet the resonant lengths of different frequency bands. Therefore, in the design of multi-band antennas, the size of LDS or FPC will increase with the increase of frequency bands, which seriously increases the antenna design space.

[0029] Based on the above-mentioned shortcomings, this disclosure firstly provides a new multi-frequency antenna, referring to... Figure 1 As shown, the multi-frequency antenna may specifically include a first metal segment 11, a second metal segment 12, a band-stop filter 2, and a feed 3. The second metal segment 12 is spaced apart from the first metal segment 11. One end of the band-stop filter 2 is connected to the end of the first metal segment 11 near the second metal segment 12, and the other end is connected to the end of the second metal segment 12 near the first metal segment 11. The feed 3 is connected to either the first metal segment 11 or the second metal segment 12.

[0030] Compared with existing technologies, the above technical solution uses a band-stop filter 2 to make the current of different frequency bands present different on / off states at the position of the band-stop filter, so that multiple resonant states can be generated on a single antenna stub. Compared with conventional FPC antennas or LDS, it saves space for designing multiple antenna stubs.

[0031] In one example embodiment of this disclosure, the first metal segment 11 may be a rectangular plate structure. The material of the first metal segment 11 may be a single metal such as copper or aluminum, or an alloy, or it may be customized according to the user's needs. No specific limitation is made in this example embodiment.

[0032] In this example embodiment, the multi-frequency antenna may include a first frequency band and a second frequency band. The feed point may be located at the end of the first metal segment 11 furthest from the second metal segment 12. The distance between the end of the first metal segment 11 near the second metal segment 12 and the feed point can be set according to the wavelength of the first frequency band. For example, the distance between the feed point and the end of the first metal segment 11 near the second metal segment 12 may be 1 / 4, 1 / 2, or the wavelength of the first frequency band. It can also be customized according to user needs, and no specific limitation is made in this example embodiment. For example, if the frequency of the first frequency band is 2.45 GHz, then the distance between the feed point and the end of the first metal segment 11 near the second metal segment 12 may be 1 / 4 of the wavelength of 2.45 GHz, specifically approximately 30 mm.

[0033] In this example embodiment, the second metal segment 12 can be a rectangular plate structure. The material of the second metal segment 12 can be a single metal such as copper or aluminum, or an alloy. It can also be customized according to the user's needs. No specific limitation is made in this example embodiment.

[0034] In this example embodiment, the multi-frequency antenna may include a first frequency band and a second frequency band. The feed point may be located at the endpoint of the second metal segment 12 furthest from the first metal segment 11. The distance between the feed point and the endpoint of the second metal segment 12 furthest from the first metal segment 11 can be set according to the wavelength of the second frequency band. For example, the distance between the feed point and the endpoint of the second metal segment 12 furthest from the first metal segment 11 may be 1 / 4, 1 / 2, etc., of the wavelength of the second frequency band, and can also be customized according to user needs. In this example embodiment, no specific limitation is made. For example, if the frequency of the first frequency band is 1.575 GHz, then the distance between the feed point and the endpoint of the second metal segment 12 furthest from the first metal segment 11 may be 1 / 4 of the wavelength of 1.575 GHz, specifically approximately 46 mm.

[0035] In this example embodiment, the first metal segment and the second metal segment can be arranged in parallel, and the projections of the first metal segment and the second metal segment along the first direction do not overlap, wherein the first direction is perpendicular to the first metal segment.

[0036] In this example implementation, refer to Figure 2 and Figure 3 As shown, the band-stop filter 2 is connected between the first metal segment and the second metal segment. Specifically, one end of the band-stop filter is connected to the end of the first metal segment near the second metal segment, and the other end is connected to the end of the second metal segment near the first metal segment. The band-stop filter 2 may include a capacitor 21 and an inductor 22 connected in parallel.

[0037] Reference Figure 4 As shown, when a specific inductor L and capacitor C are selected, the impedance value is high at a specific frequency (resonant frequency) and low at a position far from the resonant frequency.

[0038] The inductance of inductor 22 is L, and the capacitance of capacitor 21 is C. When L and C are connected in parallel, their equivalent impedance is:

[0039]

[0040] Where j is the imaginary number, ω is the frequency, L is the inductance of the inductor, and C is the capacitance of the capacitor.

[0041] The resonant frequency is calculated as follows:

[0042]

[0043] By designing specific equivalent inductance L and equivalent capacitance C according to actual needs, it is possible to achieve high impedance at the frequency where a circuit needs to be broken, preventing current from flowing through, and low impedance at the frequency where a short circuit needs to be formed, allowing current to flow through.

[0044] In this example, in real-time mode, refer to Figure 5 and Figure 6 As shown, capacitor 21 may include a first metal plate 211 and a second metal plate 212, wherein the first metal plate 211 may be connected to the first metal segment 11, the second metal plate 212 may be connected to the second metal segment 12, and the first metal plate 211 and the second metal plate 212 are arranged opposite to each other.

[0045] Specifically, the first metal plate 211 can be a square metal plate, a rectangular metal plate, or it can be customized according to the user's needs. In this example embodiment, no specific limitation is made.

[0046] The first metal plate 211 and the first metal segment 11 may include a metal connection structure. The metal connection structure may be a rectangular plate structure, and the size of the metal connection structure is smaller than that of the first metal plate 211. Specifically, if the width of the first metal segment 11 is 10mm, the width of the first metal plate 211 may be 5mm, and the metal connection structure may be 1mm.

[0047] In this example embodiment, the second metal plate 212 can be a square metal plate, a rectangular metal plate, or it can be customized according to the user's needs. No specific limitation is made in this example embodiment.

[0048] The second metal plate 212 and the second metal segment 12 may include a metal connection structure. The metal connection structure may be a rectangular plate structure, and the size of the metal connection structure is smaller than that of the second metal plate 212. Specifically, if the width of the second metal segment 12 is 10mm, the width of the second metal plate 212 may be 5mm, and the metal connection structure may be 1mm.

[0049] In this exemplary embodiment, the inductor 22 can be disposed in either the first metal segment 11 or the second metal segment 12. The inductor 22 can be formed by an extension of the first metal segment 11 or the second metal segment 12 in a serpentine, bent, branched manner. It can also be a commonly used inductor 22, and is not specifically limited in this exemplary embodiment.

[0050] In this example embodiment, the capacitor 21 is an adjustable capacitor 21 or the inductor 22 is an adjustable inductor 22, or the capacitor 21 is an adjustable capacitor 21 and the inductor 22 is an adjustable inductor 22, so as to perform frequency conversion processing on the multi-frequency antenna.

[0051] In this example embodiment, the multi-frequency antenna may further include a dielectric layer 4, which may be arranged in parallel with the first metal segment 11 and the second metal segment 12, and the first metal segment 11 and the second metal segment 12 are respectively disposed on both sides of the dielectric layer 4.

[0052] The dielectric layer 4 may be provided with through holes so that the inductor 22 can be connected between the first metal segment 11 and the second metal segment 12 through the through holes.

[0053] In this example embodiment, the material of the dielectric layer 4 is a non-conductive non-metallic material, such as plastic or rubber, and is not specifically limited in this example embodiment.

[0054] In this example embodiment, the feed source 3 is connected to the motherboard 52 of the electronic device where the multi-frequency antenna is located to supply power to the antenna.

[0055] This disclosure also provides another multi-frequency antenna, which may include multiple antenna metal segments, multiple band-stop filters 2, and a feed 3. The multiple antenna metal segments are arranged in parallel, and their projections in a second direction do not overlap, thus forming multiple gaps between the multiple antenna metal segments. The multiple band-stop filters 2 are respectively disposed in the multiple gaps, and each band-stop filter 2 is connected between any two adjacent antenna metal segments. The feed 3 is connected to one of the antenna metal segments. The second direction is perpendicular to the antenna metal segments.

[0056] In this example embodiment, multiple antenna metal segments can be arranged on the same straight line, and gaps are provided between the multiple antenna metal segments. The gaps can be used to install the band-stop filter 2. The structure of the band-stop filter 2 has been described in detail above, so it will not be repeated here.

[0057] In this example embodiment, the plurality of metal segments may not be completely arranged on the same straight line, but may be arranged in parallel, and the projections of the plurality of antenna metal segments in the second direction have no overlapping area, and the second direction may be a direction perpendicular to the antenna metal segments.

[0058] In this example embodiment, the number of antenna metal segments may include three, four, or more. This can be customized according to user needs, and no specific limitation is made in this example embodiment.

[0059] In the real-time mode of this example, the multi-frequency antenna may further include a dielectric layer 4 disposed parallel to the antenna metal segment, and any two adjacent antenna metal segments may be disposed on both sides of the dielectric layer 4.

[0060] For example, the antenna metal segment may include a first antenna metal segment, a second antenna metal segment, a third antenna metal segment, and a fourth antenna metal segment, wherein the first antenna metal segment and the third antenna metal segment may be disposed on the first side of the dielectric layer 4, and the second antenna metal segment and the fourth antenna metal segment may be disposed on the second side.

[0061] In this example embodiment, the capacitor 21 is an adjustable capacitor 21 or the inductor 22 is an adjustable inductor 22, or the capacitor 21 is an adjustable capacitor 21 and the inductor 22 is an adjustable inductor 22, so as to enable frequency conversion processing of the multi-panel antenna.

[0062] The technical solution disclosed herein uses a band-stop filter to present different on / off states for multiple frequencies, enabling an antenna to generate multiple resonant states and saving certain antenna design space.

[0063] This disclosure also provides an electronic device, with reference to Figure 7 As shown, the device may include the aforementioned multi-frequency antenna. The aforementioned electronic device may include a motherboard 52 and a housing 51. The feed 3 of the aforementioned multi-frequency antenna is disposed on the motherboard 52, and the metal segment of the aforementioned antenna is disposed on the inner side of the housing 51.

[0064] The features, structures, or characteristics described above can be combined in any suitable manner in one or more embodiments, and the features discussed in the various embodiments are interchangeable where possible. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0065] The terms “about” or “approximately” as used in this specification generally mean within 20%, preferably within 10%, and even more preferably within 5% of a given value or range. The quantities given here are approximate, meaning that unless otherwise specified, the meanings of “about,” “approximately,” “roughly,” or “approximately” are implied.

[0066] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as the orientation of the examples shown in the accompanying drawings. It is understood that if the icon's arrangement is flipped so that it is upside down, the component described as "up" will become the component described as "down." Other relative terms such as "high," "low," "top," "bottom," "front," "back," "left," and "right" also have similar meanings. When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0067] In this specification, the terms “a,” “an,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markings and are not a limitation on the number of objects.

[0068] It should be understood that this disclosure is not limited to the detailed structure and arrangement of the components presented in this specification. This disclosure is capable of other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this disclosure. It should be understood that this disclosure, as disclosed and defined in this specification, extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this disclosure. The embodiments described in this specification illustrate the best known mode for implementing this disclosure and will enable those skilled in the art to utilize this disclosure.

Claims

1. A multi-frequency antenna, characterized in that, include: First metal segment; The second metal segment is spaced apart from the first metal segment; the first metal segment and the second metal segment are arranged parallel to each other, and the projections of the first metal segment and the second metal segment along the first direction do not overlap; wherein, the first direction is perpendicular to the first metal segment; A dielectric layer is disposed parallel to the first metal segment and the second metal segment, with the first metal segment and the second metal segment located on opposite sides of the dielectric layer, respectively. A band-stop filter, one end of which is connected to the end of the first metal segment near the second metal segment, and the other end of which is connected to the end of the second metal segment near the first metal segment; the band-stop filter includes a capacitor and an inductor connected in parallel; A via is provided in the dielectric layer so that the inductor is connected between the first metal segment and the second metal segment through the via; The feed source is connected to the first metal segment or the second metal segment; The multi-frequency antenna includes a first frequency band and a second frequency band. The feed point is located at the end of the first metal segment furthest from the second metal segment. The distance between the end of the first metal segment closest to the second metal segment and the feed point is set according to the wavelength of the first frequency band; or, The power supply point is located at the end of the second metal segment away from the first metal segment, and the distance between the power supply point and the end of the second metal segment away from the first metal segment is set according to the wavelength of the second frequency band.

2. The multi-frequency antenna according to claim 1, characterized in that, The capacitor is connected between the first metal segment and the second metal segment; The inductor is connected between the first metal segment and the second metal segment, and is arranged in parallel with the capacitor.

3. The multi-frequency antenna according to claim 2, characterized in that, The capacitor includes: A first metal plate is connected to the first metal segment; The second metal plate is connected to the second metal segment and is disposed opposite to the first metal plate.

4. The multi-frequency antenna according to claim 2, characterized in that, The capacitor is an adjustable capacitor and / or the inductor is an adjustable inductor.

5. A multi-frequency antenna, characterized in that, include: Multiple antenna metal segments are arranged in parallel and there is no overlapping area in the projection of the multiple antenna metal segments along the second direction, so that multiple gaps are formed between the multiple antenna metal segments. Multiple band-stop filters are disposed in multiple gaps, and each band-stop filter is connected between any two adjacent antenna metal segments; each band-stop filter includes a capacitor and an inductor connected in parallel; the inductor is connected between two adjacent antenna metal segments through a via disposed in the dielectric layer; A feed source, connected to one of the antenna metal segments; Wherein, the second direction is perpendicular to the antenna metal segment; The multi-frequency antenna includes a first metal segment and a second metal segment spaced apart from the first metal segment, as well as a first frequency band and a second frequency band. A feed point is located at the end of the first metal segment furthest from the second metal segment. The distance between the end of the first metal segment closest to the second metal segment and the feed point is set according to the wavelength of the first frequency band; or... The feed point is located at the end of the second metal segment away from the first metal segment, and the distance between the feed point and the end of the second metal segment away from the first metal segment is set according to the wavelength of the second frequency band. The multi-frequency antenna also includes: A dielectric layer is parallel to the antenna metal segment, and any two adjacent antenna metal segments are respectively disposed on both sides of the dielectric layer.

6. The multi-frequency antenna according to claim 5, characterized in that, The capacitor includes a first metal plate and a second metal plate disposed opposite to each other. The first metal plate and the second metal plate are respectively connected to two adjacent antenna metal segments.

7. The multi-frequency antenna according to claim 6, characterized in that, The capacitor is an adjustable capacitor and / or the inductor is an adjustable inductor.

8. An electronic device, characterized in that, include: The multi-frequency antenna according to any one of claims 1 to 4 or 5 to 7.

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