Antenna and wireless communication device having the same

Abstract

The application provides an antenna and a wireless communication device with the antenna. The antenna comprises a dielectric substrate including a first surface and a second surface; a first radiating unit arranged on the first surface; a second radiating unit extending from the second surface to the first surface, the second radiating unit including a grounding portion and a first radiating portion, the part of the second radiating unit arranged on the first surface serving as the first radiating portion, and the other part of the second radiating unit serving as the grounding portion, and the first radiating portion is arranged in the first radiating unit with an interval; and a feeding portion for feeding current to the first radiating unit to excite the first working frequency band, and the current flowing through the first radiating unit is also coupled to the first radiating portion to excite the second working frequency band. The antenna provided by the application can realize miniaturization design and wide frequency design, and meets the antenna design requirements.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and more particularly to an antenna and a wireless communication device having the antenna. Background Technology

[0002] With the increasing popularity of wireless devices, their size is also getting smaller and smaller. Therefore, designing an antenna that can be used in small wireless devices, has a wide bandwidth, and supports multiple operating frequency bands has become an urgent problem to be solved. Summary of the Invention

[0003] To address the aforementioned issues, it is necessary to provide an antenna that is small in size and can support multiple operating frequency bands, as well as a wireless communication device incorporating such an antenna.

[0004] A first aspect of the present invention provides an antenna, comprising: a dielectric substrate including a first surface and a second surface; a first radiating element disposed on the first surface; a second radiating element extending from the second surface to the first surface, the second radiating element including a ground portion and a first radiating portion, the portion of the second radiating element disposed on the first surface serving as the first radiating portion, the other portion of the second radiating element not disposed on the first surface serving as the ground portion, the first radiating portion and the first radiating element being disposed adjacent to each other at intervals; and a feed portion for feeding current into the first radiating element to excite a first operating frequency band, wherein the current flowing through the first radiating element is also coupled into the first radiating portion to excite a second operating frequency band.

[0005] Furthermore, the first surface and the second surface are opposite to each other. The first radiating unit includes a second radiating part and a third radiating part. The second radiating part is connected to the third radiating part. The second radiating part is a right-angled trapezoid, and the third radiating part is a rectangle. The length of the base of the second radiating part is less than the length of the third radiating part. The right-angled side of the second radiating part is flush with one end of the third radiating part. The first radiating part and the second radiating part are arranged at intervals relative to each other. The feed part is connected to the second radiating part.

[0006] Furthermore, the first radiating part is rectangular, and the first radiating part and the third radiating part are parallel to each other.

[0007] Furthermore, the grounding portion includes a first grounding portion and a second grounding portion. The first grounding portion and the second grounding portion are perpendicularly connected. The first grounding portion is disposed near the right-angle waist of the second radiating portion, and the right-angle waist of the first grounding portion and the second radiating portion are parallel to each other. The second grounding portion is disposed on the second surface at one end away from the first radiating element. The second grounding portion and the third radiating portion are parallel to each other, and the second grounding portion is connected to the first radiating portion.

[0008] Furthermore, both the first grounding part and the second grounding part are rectangular.

[0009] Furthermore, the dielectric constant of the dielectric substrate is 9.8.

[0010] Furthermore, the first operating frequency band includes 5.15GHz-7.125GHz, and the second operating frequency band includes 2.4GHz-2.5GHz.

[0011] Furthermore, the projected area of ​​the grounding portion on the second surface along the thickness direction of the antenna does not overlap with the projected area of ​​the first radiating element on the second surface along the thickness direction of the antenna.

[0012] Furthermore, the dielectric substrate is an alumina ceramic substrate.

[0013] A second aspect of this application also provides a wireless communication device including a plurality of antennas as described in any of the preceding claims.

[0014] The antenna provided in this application extends from the second surface of the dielectric substrate to the first surface through a design where a first radiating part and a grounding part are constructed on the second radiating part. Furthermore, by setting the first radiating part on the first surface of the dielectric substrate, and having the first radiating part receive current fed into the feed part to excite a first operating frequency band, the first radiating part and the first radiating part on the first surface are coupled to each other to excite a second operating frequency band, thereby achieving miniaturized and wideband design. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an antenna provided in one embodiment of this application.

[0016] Figure 2 for Figure 1 A schematic diagram of the first surface of the antenna shown.

[0017] Figure 3 for Figure 1 A schematic diagram of the second surface of the antenna shown.

[0018] Figure 4 for Figure 1 The return loss curve of the antenna is shown.

[0019] Explanation of main component symbols

[0020] Antenna 100

[0021] Dielectric substrate 10

[0022] First surface 11

[0023] Second surface 12

[0024] First Radiation Unit 20

[0025] Second Radiation Section 21

[0026] Third Radiation Section 22

[0027] Second radiation unit 30

[0028] First Radiation Section 31

[0029] Grounding part 32

[0030] First grounding part 321

[0031] Second grounding part 322

[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] 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.

[0037] With the increasing prevalence of wireless devices, their size is also decreasing. Therefore, designing an antenna that can be used in small wireless devices while also having a wide bandwidth and supporting multiple operating frequency bands has become an urgent problem to be solved.

[0038] Therefore, please refer to Figure 1This application provides an antenna 100, which can be installed in wireless communication devices (not shown) such as Customer Premise Equipment (CPE), routers, set-top boxes, mobile phones, and laptops, for transmitting and receiving radio waves to transmit and exchange wireless signals.

[0039] In some embodiments, the antenna 100 includes a dielectric substrate 10, a first radiating element 20, a second radiating element 30, and a feed section 40.

[0040] The dielectric substrate 10 includes a first surface 11 and a second surface 12.

[0041] A first radiating element 20 is disposed on a first surface 11. A second radiating element 30 extends from a second surface 12 to the first surface 11. The second radiating element 30 includes a first radiating portion 31 and a grounding portion 32. The portion of the second radiating element 30 disposed on the first surface 11 serves as the first radiating portion 31. The remaining portion of the second radiating element 30, excluding the portion disposed on the first surface 11, serves as the grounding portion 32. The first radiating portion 31 and the first radiating element 20 are disposed adjacent to each other at intervals.

[0042] The feed section 40 is used to feed current into the first radiating element 20 so that the first radiating element 20 excites a first operating frequency band. The current flowing through the first radiating element 20 is also coupled into the first radiating section 31 so that the first radiating section 31 excites a second operating frequency band. In some embodiments, the feed section 40 may be a microstrip line or other metal conductor connected to a feed line.

[0043] It is understood that the antenna 100 provided in this application, by setting a first radiating element 20 and a second radiating element 30 on the dielectric substrate 10, and the second radiating element 30 extending from the second surface 12 to the first surface 11, forms a first radiating portion 31 and a grounding portion 32 on the second radiating element 30; the first radiating element 20 receives the current fed in by the feed portion 40 to excite a first operating frequency band, and the first radiating portion 31 is coupled to the first radiating element 20 on the first surface 11 to excite a second operating frequency band. Thus, the antenna 100 provided in this application, through the above design, not only achieves a miniaturized design, but also, while providing the grounding portion 32 of the antenna 100, can excite multiple operating frequency bands without setting more feed portions, thereby achieving a miniaturized and wideband design of the antenna 100.

[0044] In some embodiments, the first radiating unit 20 includes a second radiating section 21 and a third radiating section 22, with the second radiating section 21 connected to the third radiating section 22. The second radiating section 21 is a right-angled trapezoid, and the third radiating section 22 is rectangular. The right-angled side of the second radiating section 21 is flush with one end of the third radiating section 22. A feed-in section 40 is connected to the second radiating section 21. Thus, through the above design, the second radiating section 21 and the third radiating section 22 jointly excite the first operating frequency band.

[0045] The first radiating section 31 and the third radiating section 22 are parallel to each other. The first radiating section 31 and the second radiating section 21 are arranged at a distance from each other. In this way, when the feed section 40 feeds current to the second radiating section 21, the second radiating section 21 will also couple current into the first radiating section 31, so that the first radiating section 31 can excite the second operating frequency band.

[0046] For further information, please refer to [link / reference]. Figure 2 In this embodiment, the second radiating portion 21 and the third radiating portion 22 are formed from the same conductor, for example, a metal sheet. The length L of the bottom edge of the second radiating portion 21 is... B It is 8.5 mm, which is smaller than the length L of the third radiating part 22. E For example, 15 mm. The third radiating portion 22 is also provided along the edge of the first surface 11, and the end of the third radiating portion 22 away from the right-angle waist of the second radiating portion 21 is aligned with the edge of the first surface 11 of the dielectric substrate 10.

[0047] In this embodiment of the application, the width W of the third radiating portion 22 E It is 3.5 mm. The length L of the other bottom edge of the second radiating part 21 is... S The length of the right-angled waist of the second radiating section 21 is 6 mm. The length of the right-angled waist of the second radiating section 21 is 10.4 mm. The distance W from the end of the second radiating section 21 furthest from the third radiating section 22 to the feed section 40 is... S The distance W from the end of the second radiating section 21 near the third radiating section 22 to the feed section 40 is 3 mm. B It is 5.6 mm. The width W of the feed section 40 is... T It is 1.8 mm. The length W of the feed section 40 is... E It is 3.5 mm long. The length L of the first radiating part 31 is... N3 The width W of the first radiating section 31 is 12 mm. N It is 2.5 mm.

[0048] Please continue reading. Figure 3In some embodiments, the grounding portion 32 in the second radiating unit 30 includes a first grounding portion 321 and a second grounding portion 322. The first grounding portion 321 and the second grounding portion 322 are perpendicularly connected. The first grounding portion 321 is disposed near the right-angled side of the second radiating portion 21, and the right-angled side of the first grounding portion 321 and the right-angled side of the second radiating portion 21 are parallel to each other. In some embodiments, the first grounding portion 321 and the second grounding portion 322 may also be formed from the same conductor.

[0049] The second grounding portion 322 is disposed on the second surface 12 at one end away from the first radiating unit 20. The second grounding portion 322 is parallel to the third radiating portion 22, and the second grounding portion 322 is connected to the first radiating portion 31.

[0050] In this embodiment, both the first grounding portion 321 and the second grounding portion 322 are rectangular. The first grounding portion 321 is aligned with the edge of the right-angled section of the second surface 12 near the second radiating portion 21. The second grounding portion 322 is aligned with the edge of the second surface 12 near the second radiating portion 21, and is vertically connected to the first grounding portion 321. The length W of the first grounding portion 321 is... A The width of the first ground portion 321 is the same as that of the dielectric substrate 10, both being 20 mm. G It is 5 mm, which is less than the distance from the right-angled waist of the second radiating portion 21 to the edge of the adjacent second surface 12. The length L of the second grounding portion 322... N1 The width W of the second grounding portion 322 is 15 mm. N It is 2.5 mm (refer to) Figure 1 This distance is less than the distance from the end of the second radiating part 21 away from the third radiating part 22 to the edge of the first surface 11. Thus, the grounding part 32 is located along the thickness direction of the antenna 100. Figure 1 The projected area of ​​the first radiating element 20 on the second surface 12 (in the direction of the Z-axis) does not overlap with the projected area of ​​the first radiating element 20 on the second surface 12 along the thickness direction of the antenna 100, so that the first radiating element 20 can radiate in the direction of the second surface 12, thereby expanding the radiation pattern of the antenna 100. In this embodiment, the height L of the dielectric substrate 10 N2 It is 1.3 mm.

[0051] It can be understood that the first radiating portion 31 is formed by extending the end of the second grounding portion 322 away from the first grounding portion 321 to the first surface 11. Thus, the first radiating portion 31 is aligned with the edge of the first surface 11 away from the third radiating portion 22. In this embodiment, the width of the first radiating portion 31 is equal to the width W of the second grounding portion 322. N The lengths are the same, both being 2.5 mm. The length L of the first radiating section 31 is... N3 It is 12 millimeters.

[0052] Please refer to it again. Figure 1 In some embodiments, the dielectric substrate 10 has a dielectric constant of 9.8. This effectively reduces field leakage and cross-coupling effects in the antenna 100, which is beneficial for the antenna 100 to radiate signals outwards. For example, in this embodiment, the dielectric substrate 10 is an alumina ceramic substrate with a dielectric constant of 9.8 and a hardness of 9. Thus, the dielectric substrate 10 provided in this embodiment has characteristics such as drop resistance and corrosion resistance.

[0053] It is understood that this application does not limit the positions of the first surface 11 and the second surface 12 on the dielectric substrate 10, as long as the first surface 11 and the second surface 12 are not on the same surface. This reduces the area of ​​the dielectric substrate 10, maximizing the miniaturization of the antenna 100. In the embodiments of this application, the first surface 11 and the second surface 12 are two mutually opposing surfaces on the dielectric substrate 10. For example, the first surface 11 and the second surface 12 are the upper and lower surfaces of the dielectric substrate 10, respectively. This further reduces the required area and volume of the dielectric substrate 10, which is beneficial for reducing the size of the antenna 100. In other embodiments, the first surface 11 and the second surface 12 may also be two adjacent or spaced-apart surfaces on the dielectric substrate 10.

[0054] It is understood that this application does not limit the size and shape of the dielectric substrate 10. In other embodiments, the dielectric substrate 10 may also have other shapes, and in different shapes, each part of the first radiating unit 20 and the second radiating unit 30 need not be located at the edge of the dielectric substrate, as long as the first radiating unit 20 and the second radiating unit 30 can still achieve the corresponding functions according to the inventive concept of this application.

[0055] Please continue reading. Figure 4 , Figure 4 This is a return loss curve diagram of the antenna 100 provided according to this application. Curve S is the return loss curve of the antenna 100 provided in this application under simulation conditions; curve M is the return loss curve of the antenna 100 provided in this application obtained through laboratory physical testing. Figure 4 It can be seen that the return loss of the antenna 100 provided in this application is less than -10dB in both the first operating frequency band (including 5.15GHz-7.125GHz) and the second operating frequency band (including 2.4GHz-2.5GHz), which meets the antenna design requirements.

[0056] Therefore, the antenna 100 provided in this application is applicable to various Wi-Fi standards, including Wi-Fi 4 (operating frequency bands covering 2.4GHz-2.5GHz), Wi-Fi 5 (operating frequency bands covering 2.4GHz-2.5GHz and 5.15GHz-5.85GHz), Wi-Fi 6 (operating frequency bands covering 2.4GHz-2.5GHz and 5GHz), and Wi-Fi 7 (operating frequency bands covering 2.4GHz-2.5GHz, 5GHz, and 5.925GHz-7.125GHz). In particular, the Wi-Fi 7 standard can theoretically support bandwidths of up to 30Gbps per access point, and its maximum network speed can reach 46.4Gbps. Thus, the antenna 100 provided in this application meets the current development trend of Wi-Fi technology and allows wireless communication devices equipped with the antenna 100 to achieve faster network speeds while reducing the number of antennas.

[0057] In summary, the antenna 100 provided in this application, through the design of the second radiating element 30 extending from the second surface 12 to the first surface 11 of the dielectric substrate 10, constructs a first radiating portion 31 and a grounding portion 32 on the second radiating element 30; furthermore, by providing a first radiating element 20 on the first surface 11 of the dielectric substrate 10, and the first radiating element 20 receiving current fed by the feed portion 40 to excite a first operating frequency band, the first radiating portion 31 and the first radiating element 20 on the first surface 11 are coupled to each other to excite a second operating frequency band, thereby achieving miniaturized and wideband design. Furthermore, the antenna 100 provided in this application is applicable to various Wi-Fi standards, especially Wi-Fi 7, thus enabling wireless communication devices equipped with the antenna 100 to have faster network speeds while reducing the number of antennas.

[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, characterized in that: The antenna includes: A dielectric substrate, including a first surface and a second surface; A first radiating element is disposed on the first surface; A second radiating element extends from the second surface to the first surface. The second radiating element includes a ground portion and a first radiating portion. The portion of the second radiating element disposed on the first surface serves as the first radiating portion, and the remaining portion of the second radiating element excluding the portion disposed on the first surface serves as the ground portion. The first radiating portion and the first radiating element are disposed adjacent to each other at intervals. The feed section is used to feed current into the first radiating unit so that the first radiating unit excites a first operating frequency band. The current flowing through the first radiating unit is also coupled into the first radiating section so that the first radiating section excites a second operating frequency band. The first radiating unit includes a second radiating part and a third radiating part. The second radiating part is connected to the third radiating part. The second radiating part is a right-angled trapezoid, and the third radiating part is a rectangle. The length of the base of the second radiating part is less than the length of the third radiating part, and the right-angled side of the second radiating part is flush with one end of the third radiating part.

2. The antenna as described in claim 1, characterized in that: The first surface and the second surface are opposite to each other, the first radiating part and the second radiating part are disposed at a distance from each other, and the feed part is connected to the second radiating part.

3. The antenna as described in claim 2, characterized in that: The first radiating part is rectangular, and the first radiating part and the third radiating part are parallel to each other.

4. The antenna as described in claim 2, characterized in that: The grounding portion includes a first grounding portion and a second grounding portion. The first grounding portion is perpendicularly connected to the second grounding portion. The first grounding portion is disposed near the right-angle waist of the second radiating portion, and the right-angle waist of the first grounding portion and the second radiating portion are parallel to each other. The second grounding portion is disposed on the second surface at one end away from the first radiating element. The second grounding portion is parallel to the third radiating portion, and the second grounding portion is connected to the first radiating portion.

5. The antenna as described in claim 4, characterized in that: Both the first grounding part and the second grounding part are rectangular.

6. The antenna as described in claim 1, characterized in that: The dielectric constant of the dielectric substrate is 9.

8.

7. The antenna according to any one of claims 1-6, characterized in that: The first operating frequency band includes 5.15 GHz-7.125 GHz, and the second operating frequency band includes 2.4 GHz-2.5 GHz.

8. The antenna according to any one of claims 1-6, characterized in that: The projected area of ​​the grounding portion on the second surface along the thickness direction of the antenna does not overlap with the projected area of ​​the first radiating element on the second surface along the thickness direction of the antenna.

9. The antenna as described in any one of claims 1-6, characterized in that: The dielectric substrate is an alumina ceramic substrate.

10. A wireless communication device, characterized in that: The wireless communication device includes a plurality of antennas as described in any one of claims 1-9.

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