Antenna structure and wireless communication device having the same

Abstract

The application provides an antenna structure and a wireless communication device with the antenna structure. The antenna structure comprises a first substrate, a second substrate, at least one first radiation unit, a feed source and a ground plane. The first substrate is bent to form a receiving space for receiving the second substrate. The feed source is arranged on a first surface of the second substrate, the ground plane is arranged on a second surface of the second substrate, and the at least one first radiation unit is arranged on an upper surface of the first substrate. The feed source is electrically connected to the at least one first radiation unit to feed the first radiation unit with an electrical signal, and the ground plane is electrically connected to the at least one first radiation unit to provide the first radiation unit with a ground. The antenna structure provided by the application has higher antenna gain and can meet the design requirements of antenna operation.

Description

Technical Field

[0001] This invention relates to an antenna structure with high gain and a wireless communication device having the antenna structure. Background Technology

[0002] With the rapid development of wireless communication technology, Ultra Wide Band (UWB) technology has entered the application stage. UWB technology is a wireless carrier communication technology that does not use a sinusoidal carrier but instead uses nanosecond-level non-sinusoidal narrow pulses to transmit data. Therefore, it occupies a wide spectrum, ranging from 3.1 GHz to 10.6 GHz. However, current UWB antennas have relatively low gain, which can easily lead to poor signal reception or even signal dropouts. Summary of the Invention

[0003] To address the aforementioned problems, it is necessary to provide an antenna structure with high gain and a wireless communication device having the antenna structure.

[0004] The first aspect of the present invention provides an antenna structure including a first substrate, a second substrate, at least one first radiating element, a feed source, and a ground plane. The first substrate is bent to form a receiving space for receiving the second substrate. The feed source is disposed on a first surface of the second substrate, and the ground plane is disposed on a second surface of the second substrate. The at least one first radiating element is disposed on an upper surface of the first substrate. The feed source is electrically connected to the at least one first radiating element to feed an electrical signal to the first radiating element, and the ground plane is electrically connected to the at least one first radiating element to provide grounding for the first radiating element.

[0005] Furthermore, the first substrate is flat, and its two ends are joined together to form the receiving space that is connected on both sides, and one end of the second substrate is received within the receiving space.

[0006] Furthermore, the feed source includes a feed end and a ground end. The feed end is electrically connected to the at least one first radiating element, and one end of the ground end is electrically connected to the at least one first radiating element, while the other end is electrically connected to the ground plane.

[0007] Furthermore, the first surface is also provided with a second radiating unit, which is electrically connected to the feed end and the ground end respectively.

[0008] Furthermore, the pattern of the second radiating unit is approximately two intersecting semicircles forming a horn-shaped opening, which faces the end where the first substrate is located.

[0009] Furthermore, the second radiating element is symmetrical in the horizontal radiating direction.

[0010] Furthermore, the feed source includes an SMA (SubMiniature version A) interface.

[0011] Furthermore, the first substrate is a flexible substrate.

[0012] In another aspect, the present invention provides a wireless communication device, the wireless communication device comprising the antenna structure as described in any of the preceding claims.

[0013] The antenna structure provided by the present invention changes the phase angle of a plurality of first radiating elements attached to the first substrate by bending the first substrate, thereby changing the radiation wavelength refraction and electromagnetic wave divergence trajectory of the plurality of first radiating elements, and thus enhancing the radiation efficiency and antenna gain of the antenna structure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of an antenna structure according to an embodiment of the present invention.

[0015] Figure 2 This is a structural block diagram of the feed source, the first radiation unit, and the second radiation unit in Embodiment 1 of the present invention.

[0016] Figure 3 for Figure 1 The antenna gain diagram for the antenna structure shown is operating between 6 GHz and 18 GHz.

[0017] Explanation of main component symbols

[0018] Antenna structure 100

[0019] First substrate 10

[0020] First radiating unit 11

[0021] Containment space 12

[0022] Second substrate 20

[0023] First surface 21

[0024] Second surface 22

[0025] Ground 221

[0026] Second radiation unit 23

[0027] Opening 231

[0028] Conductive contact 24

[0029] Feed source 30

[0030] Feed-in end 31

[0031] Grounding terminal 32

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] It should be noted that when one component is referred to as "electrically connected" to another component, it can be directly on the other component or there can be an intervening component. When one component is considered to be "electrically connected" to another component, it can be a contact connection, such as a wire connection, or a non-contact connection, such as a non-contact coupling.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] In this document, unless otherwise expressly specified and limited, directional terms such as “above,” “below,” “upper end,” “lower end,” “lower surface,” “clockwise,” “counterclockwise,” “left,” and “right” indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this document and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of protection of this application.

[0037] In this document, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "below," and "over" a second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature. "Above," "below," and "under" a second feature include the first feature being directly below or diagonally below the second feature, or simply indicating that the first feature is at a lower horizontal level than the second feature.

[0038] In this document, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0040] Please refer to the following: Figure 1 A preferred embodiment of the present invention provides an antenna structure 100, which can be disposed within a wireless communication device (not shown) for transmitting and receiving radio waves to transmit and exchange wireless signals. The wireless communication device can be, but is not limited to, mobile communication devices, smart home devices, customer premises equipment (CPE), routers, and set-top boxes, etc.

[0041] It is understood that the antenna structure 100 can be used as an ultra-wideband (UWB) communication antenna.

[0042] The antenna structure 100 includes a first substrate 10, a second substrate 20, at least one first radiating element 11, a feed source 30, and a ground plane 221 (see [reference]). Figure 2 The first substrate 10 is bent to form a receiving space 12 for receiving the second substrate 20. The feed source 30 is disposed on the first surface 21 of the second substrate 20, and the ground plane 221 is disposed on the second surface 22 of the second substrate 20. It can be understood that the first surface 21 and the second surface 22 are two surfaces of the second substrate 20 that are opposite to each other.

[0043] The at least one first radiating element 11 is disposed on the upper surface of the first substrate 10. The feed source 30 is electrically connected to the at least one first radiating element 11 to feed an electrical signal to the first radiating element 11, thereby exciting a corresponding radiating frequency band. The ground plane 221 is electrically connected to the at least one first radiating element 11 to provide grounding for the first radiating element 11.

[0044] The first substrate 10 and the second substrate 20 can be ceramic substrates or organic substrates. In this embodiment, the first substrate 10 is a flexible, bendable substrate, such as a flexible printed circuit board (FPC). The second substrate 20 is a rigid substrate, such as an FR4 epoxy board. In other embodiments, the second substrate 20 can also be a flexible, bendable substrate, such as a flexible printed circuit board.

[0045] In this embodiment, the first substrate 10 is flat, and its two ends are joined together to form the receiving space 12, which is open on both sides. Thus, the cross-section of the first substrate 10 is approximately elliptical. One end of the second substrate 20 is received within the receiving space 12.

[0046] In this embodiment, each of the first radiating units 11 is in the form of a patch, i.e., a radiating patch. A plurality of the first radiating units 11 are arranged in an array on the outer surface of the first substrate 10.

[0047] The second substrate 20 is also a generally rectangular sheet. One end of the second substrate 20 can be connected to the first substrate 10 by an adhesive or other connection method, and is housed within the housing space 12.

[0048] It is understood that the first radiating unit 11 can be electrically connected to the feed source 30 or the ground plane 221 through a metal via; the first radiating unit 11 can also be electrically connected to the feed source 30 or the ground plane 221 through a coaxial feed line.

[0049] In this embodiment, the feed source 30 is a high-frequency connector, such as a Sub-Miniature Version A (SMA).

[0050] Please see Figure 2 In this embodiment, the at least one first radiating element 11 is electrically connected to the feed source 30 via a coaxial feed line (not shown). The feed source 30 includes a feed terminal 31 and a ground terminal 32. The feed terminal 31 is electrically connected to the at least one first radiating element 11 via the inner conductor of the coaxial feed line to feed an electrical signal into the first radiating element 11. The ground terminal 32 is electrically connected to the at least one first radiating element 11 via the outer conductor of the coaxial feed line, and the ground terminal 32 is also electrically connected to the ground plane 221, thereby providing grounding for the first radiating element 11. It can be understood that the ground terminal 32 can be electrically connected to the ground plane 221 via a metal via or a wire.

[0051] It is understood that the antenna structure 100 provided by the present invention changes the phase angle of a plurality of first radiating elements 11 attached to the first substrate 10 by bending the first substrate 10, thereby changing the radiation wavelength refraction and electromagnetic wave divergence trajectory of the plurality of first radiating elements 11, thereby enhancing the radiation efficiency and antenna gain of the antenna structure 100.

[0052] Please refer to it again. Figure 1 In one embodiment, a second radiating unit 23 is further disposed on the first surface 21 of the second substrate 20. It can be understood that the second radiating unit 23 may be a radiating patch or a conductive coating.

[0053] In this embodiment, the second radiating element 23 is a conductive coating covering the surface of the second substrate 20. The pattern of the second radiating element 23 is approximately two intersecting semicircles. That is, the second radiating element 23 is disposed on the first surface 21 of the second substrate 20 and forms a generally horn-shaped opening 231. The opening 231 faces the end where the first substrate 10 is located. In this way, the bandwidth of the antenna structure 100 can be effectively extended, making the radiation direction of the antenna structure 100 more concentrated. Furthermore, the second radiating element 23 has symmetry, which makes the antenna structure 100 symmetrical in the horizontal radiation direction.

[0054] It is understood that a plurality of conductive contacts 24 are also provided on the second substrate 20. The second radiating unit 23 is disposed on the first surface 21, avoiding the conductive contacts 24 on the second substrate 20. In this way, the antenna structure 100 can be easily connected to other electronic components through the conductive contacts 24, and the influence of the conductive contacts 24 on the radiation performance of the second radiating unit 23 can be reduced.

[0055] It is understood that the second radiating unit 23 is also electrically connected to the feed end 31 and ground end 32 of the feed source 30 via a coaxial feed line, thereby forming a complete electrical circuit.

[0056] It is understood that the antenna structure 100 also forms an antenna with a horn-shaped opening by setting the second radiating element 23 on the second substrate 20, so as to effectively expand the bandwidth of the antenna structure 100 and concentrate the radiation direction of the antenna structure 100, so that the antenna structure 100 has better radiation performance.

[0057] Please see Figure 3The diagram shows the antenna gain curves of the antenna structure 100 and other antenna structures operating in the 6GHz-18GHz range. Curve S1 represents the antenna gain curve of the antenna structure 100 operating in the 6GHz-18GHz range, and curve S2 represents the antenna gain curves of other antenna structures operating in the 6GHz-18GHz range. It can be understood that in the antenna structure 100, the first substrate 10 is bent relative to the second substrate 20. In the other antenna structures, the first substrate 10 is horizontally positioned relative to the second substrate 20. Figure 3 It can be seen that the antenna gain of the antenna structure 100 is higher than that of other antenna structures, which can meet the antenna operation design requirements.

[0058] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the preferred embodiments above, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention should not depart from the spirit and scope of the present invention. Those skilled in the art can also make other changes within the spirit of the present invention and use them in the design of the present invention, as long as they do not deviate from the technical effects of the present invention. These changes made according to the spirit of the present invention should all be included within the scope of protection claimed by the present invention.

Claims

1. An antenna structure, characterized in that: The device includes a first substrate, a second substrate, at least one first radiating element, a feed source, and a ground plane. The first substrate is bent to form a receiving space for receiving the second substrate. The feed source is disposed on a first surface of the second substrate, and the ground plane is disposed on a second surface of the second substrate. The at least one first radiating element is disposed on the upper surface of the first substrate. The feed source is electrically connected to the at least one first radiating element to feed an electrical signal to the first radiating element. The ground plane is electrically connected to the at least one first radiating element to provide grounding for the first radiating element. The first surface is also provided with a second radiating element. The pattern of the second radiating element is approximately two connected semicircles forming a horn-shaped opening, which faces the end where the first substrate is located.

2. The antenna structure as described in claim 1, characterized in that: The first substrate is flat, and its two ends are joined together to form the receiving space that is connected on both sides. One end of the second substrate is received within the receiving space.

3. The antenna structure as described in claim 2, characterized in that: The feed source includes a feed end and a ground end. The feed end is electrically connected to the at least one first radiating element, and one end of the ground end is electrically connected to the at least one first radiating element, and the other end is electrically connected to the ground plane.

4. The antenna structure as described in claim 3, characterized in that: The second radiating unit is electrically connected to the feed terminal and the ground terminal.

5. The antenna structure as described in claim 1, characterized in that: The second radiating element is symmetrical in the horizontal radiating direction.

6. The antenna structure as described in claim 1, characterized in that: The feed source includes an SMA (SubMiniatureversion A) interface.

7. The antenna structure as described in claim 1, characterized in that: The first substrate is a flexible substrate.

8. A wireless communication device, characterized in that: The wireless communication device includes the antenna structure as described in any one of claims 1 to 7.

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