Antenna apparatus and terminal device

Abstract

An antenna apparatus and a terminal device are disclosed. The antenna apparatus includes a radiator, a metal ground plane, and a loading component. The radiator includes a first radiating branch, a second radiating branch, and a third radiating branch. One end of the second radiating branch is connected to one end of the first radiating branch, while one end of the third radiating branch is connected to the other end of the first radiating branch. The other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane. One end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane.

Description

[0001] This application claims priority to Chinese Application No. 202322222886.1, entitled "ANTENNA APPARATUS AND TERMINAL DEVICE", filed to the China National Intellectual Property Administration on August 16, 2023. The entire disclosures of the above application are incorporated herein by reference.TECHNICAL FIELD

[0002] The present disclosure relates to a field of antenna technology, specifically to an antenna apparatus and a terminal device.BACKGROUND

[0003] Current unbalanced-fed slot antennas belong to narrowband antenna types. When miniaturization is required in actual applications, antenna miniaturization often leads to narrowing of impedance bandwidth, further reducing the antenna's bandwidth.

[0004] Thus, existing technologies still require improvement.TECHNICAL PROBLEM

[0005] Antenna miniaturization often leads to narrowing of impedance bandwidth, further reducing the antenna's bandwidth and degrading the communication capability of transceiver-integrated communication antennas.SUMMARY

[0006] The present disclosure provides an antenna apparatus and a terminal device, which may effectively increase the bandwidth of the antenna apparatus and enhance the communication capability of the antenna apparatus.

[0007] The present disclosure provides an antenna apparatus. The antenna apparatus includes: a radiator, wherein the radiator includes a first radiating branch, a second radiating branch, and a third radiating branch; one end of the second radiating branch is connected to one end of the first radiating branch, while one end of the third radiating branch is connected to the other end of the first radiating branch; a metal ground plane, wherein the other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane; a loading component, wherein one end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane.

[0008] In some embodiments, the loading component includes a resistor, an inductor, or a capacitor.

[0009] In some embodiments, the loading component includes a resistor, an inductor, and a capacitor.

[0010] In some embodiments, a feed point is provided on the first radiating branch.

[0011] A position where an end of the loading component is connected to the first radiating branch is a loading connection point.

[0012] The loading connection point and the feed point are substantially symmetrical about a symmetry center which is a center of the first radiating branch as.

[0013] In some embodiments, the radiator of the antenna apparatus is located in a same plane as the metal ground plane.

[0014] In some embodiments, the radiator and the metal ground plane are located in different planes.

[0015] In some embodiments, the antenna apparatus further includes a microstrip feed line, wherein the feed point is connected to feeding source through the microstrip feed line.

[0016] In some embodiments, the antenna apparatus further includes a fourth radiating branch and a fifth radiating branch.

[0017] The loading component is mounted on the metal ground plane.

[0018] The fourth radiating branch is used to connect the first radiating branch and the loading component.

[0019] The fifth radiating branch is used to connect the feeding point and a feeding port on the metal ground plane.

[0020] In some embodiments, the second radiating branch includes a first radiating portion and a second radiating portion, the first radiating portion and the second radiating portion are arranged in an L-shape.

[0021] The first radiating portion is configured to connect to one end of the first radiating branch.

[0022] The second radiating portion is configured to be welded on the metal ground plane.

[0023] In some embodiments, the third radiating branch includes a third radiating portion and a fourth radiating portion, the third radiating portion and the fourth radiating portion are arranged in an L-shape.

[0024] The third radiating portion is configured to connect to the other end of the first radiating branch.

[0025] The fourth radiating portion is configured to be welded on the metal ground plane.

[0026] In some embodiments, a plurality of jacks are arranged on the metal ground plane.

[0027] The other end of the second radiating branch is plugged into a corresponding jack to connect with the metal ground plane.

[0028] The other end of the third radiating branch is plugged into another corresponding jack to connect with the metal ground plane.

[0029] In some embodiments, the fourth radiating branch includes a fifth radiating portion and a sixth radiating portion, the fifth radiating portion and the sixth radiating portion are arranged in an L-shape.

[0030] The fifth radiating portion is configured to connect to the first radiating branch.

[0031] The sixth radiating portion is configured to be welded on the metal ground plane and electrically connecting with the loading component.

[0032] In some embodiments, the fifth radiating branch includes a seventh radiating portion and an eighth radiating portion, the seventh radiating portion and the eighth radiating portion are arranged in an L-shape.

[0033] The seventh radiating portion is configured to connect to the first radiating branch,

[0034] The eighth radiating portion is configured to be welded on the metal ground plane and connecting with the feeding source,

[0035] A terminal device, includes an antenna apparatus, wherein the antenna apparatus includes: a radiator, wherein the radiator includes a first radiating branch, a second radiating branch, and a third radiating branch; one end of the second radiating branch is connected to one end of the first radiating branch, while one end of the third radiating branch is connected to the other end of the first radiating branch; a metal ground plane, wherein the other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane; a loading component, wherein one end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane.

[0036] In some embodiments, the loading component includes a resistor, an inductor, or a capacitor.

[0037] In some embodiments, the loading component includes a resistor, an inductor, and a capacitor.

[0038] In some embodiments, a feed point is provided on the first radiating branch.

[0039] A position where an end of the loading component is connected to the first radiating branch is a loading connection point.

[0040] The loading connection point and the feed point are substantially symmetrical about a symmetry center which is a center of the first radiating branch as.

[0041] In some embodiments, the radiator of the antenna apparatus is located in a same plane as the metal ground plane.

[0042] In some embodiments, the radiator and the metal ground plane are located in different planes.

[0043] In some embodiments, the antenna apparatus further includes a microstrip feed line, wherein the feed point is connected to feeding source through the microstrip feed lineBENEFICIAL EFFECTS

[0044] The antenna apparatus and terminal device provided in the present disclosure include a radiator, a metal ground plane, and a loading component. The radiator includes a first radiating branch, a second radiating branch, and a third radiating branch. One end of the second radiating branch is connected to one end of the first radiating branch, and one end of the third radiating branch is connected to the other end of the first radiating branch. The other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane. One end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane. In the present disclosure, the loading component is configured to alter the current distribution in the radiator, so as to achieve the purpose of impedance matching to increase the bandwidth of the antenna apparatus, and further improve the performance of the antenna apparatus to enhance the communication capability.BRIEF DESCRIPTION OF DRAWINGS

[0045] The technical solutions and other beneficial effects of the present disclosure will become apparent through the following detailed description of embodiments with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a first configuration of an antenna apparatus according to an embodiment of the present disclosure. FIG. 2 is a front view of a second configuration of the antenna apparatus according to an embodiment of the present disclosure. FIG. 3 is a top view of the second configuration of the antenna apparatus according to an embodiment of the present disclosure. FIG. 4 is a perspective view of the second configuration of the antenna apparatus according to an embodiment of the present disclosure. FIG. 5 is a comparative diagram of return loss before and after configuring the loading component in the antenna apparatus according to an embodiment of the present disclosure. FIG. 6 is a comparative diagram of standing wave ratio before and after configuring the loading component in the antenna apparatus according to an embodiment of the present disclosure.

[0046] In which, the reference numeral indicates: 11- first radiating branch; 12- second radiating branch; 13- third radiating branch; 14- fourth radiating branch; 15- fifth radiating branch. 121- first radiating portion; 122- second radiating portion; 131- third radiating portion; 132- fourth radiating portion; 141- fifth radiating portion; 142- sixth radiating portion; 151- seventh radiating portion; 152- eighth radiating portion. 20- metal ground plane; 30- loading component; 40- microstrip feed line; 50- substrate material. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments represent only a portion of the present disclosure's examples, not all possible implementations. Based on the embodiments herein, all other implementations obtained by those skilled in the art without creative effort shall fall within the scope of the present disclosure.

[0048] Additionally, terms "first" and "second" are used solely for descriptive purposes and should not be construed as indicating relative importance or implicitly specifying the quantity of technical features. Features defined by "first" or "second" may explicitly or implicitly include one or more instances. In this specification, "multiple" means two or more unless explicitly defined otherwise.

[0049] Referring to FIG.1, the present disclosure provides an antenna apparatus. The antenna apparatus includes a radiator, a metal ground plane 20, and a loading component 30. The radiator includes a first radiating branch 11, a second radiating branch 12, and a third radiating branch 13. One end of the second radiating branch 12 is connected to one end of the first radiating branch 11, while one end of the third radiating branch 13 is connected to the other end of the first radiating branch 11. The other end of the second radiating branch 12 and the other end of the third radiating branch 13 are both connected to the metal ground plane 20, and a predetermined gap "h" is arranged between the first radiating branch 11 and the metal ground plane 20. One end of the loading component 30 is connected to the first radiating branch 11, and the other end of the loading component 30 is connected to the metal ground plane 20.

[0050] In the present disclosure, the first radiating branch 11 serves as resonant edge of the antenna apparatus, while both the second radiating branch 12 and the third radiating branch 13 are connected to ground (the metal ground plane 20) as shorted edges. The loading component 30 may include a conductor, specifically a pure resistor, an inductor, a capacitor, or a component with resistance, inductance and capacitance resistance characteristics, without limitation in the present disclosure. The loading component 30 may be positioned near the second radiating branch 12 or the third radiating branch 13, and the specific position of the loading component 30 could be determined through tuning, which is not specifically limited in the present disclosure. The loading component 30 is configured to alter the current distribution in the radiator, so as to achieve the purpose of impedance matching to increase the bandwidth of the antenna apparatus, and further improve the performance of the antenna apparatus to enhance the communication capability.

[0051] In some embodiments, a feed point B is arranged on the first radiating branch 11. A position where an end of the loading component 30 is connected to the first radiating branch 11 is a loading connection point A. The loading connection point A and the feed point B are substantially symmetrical about a symmetry center which is a center of the first radiating branch 11 as. For instance, if the loading component 30 is near the second radiating branch 12, the feed point B may be positioned near the third radiating branch 13, and the corresponding feeding is close to the third radiating branch 13. In the present disclosure, the feeding is set near an end of the first radiating branch 11, but not near the center of the first radiating branch 11, so as to form an unbalanced feeding mode. The loading component 30 is arranged near the center symmetry position of the first radiating branch 11, that is, the resonant edge, which could alter the current distribution in the radiator, so as to achieve the purpose of impedance matching to increase the bandwidth of the antenna apparatus, and further improve the performance of the antenna apparatus to enhance the communication capability. An impedance value of the loading component 30 is adjustable according to the performance parameters of the antenna apparatus in the communication system, which is not specifically limited in the present disclosure.

[0052] In some implementations, a length of the first radiating branch 11 (the resonant edge) is substantially half a wavelength.

[0053] As shown in FIG. 1, as an embodiment, the radiator of the antenna apparatus in the present disclosure could be located in a same plane as the metal ground plane 20. When the radiator and the metal ground plane 20 are arranged on the same plane, the antenna apparatus could be connected to the feeding through a microstrip feed line 40. Correspondingly, the antenna apparatus could also be provided with a microstrip feed line 40, and the feed point B of the first radiating branch 11 is connected to feeding source through the microstrip feed line 40. The radiator may be supported by substrate material 50 when the radiator and the metal ground plane 20 are arranged on the same plane.

[0054] As an embodiment, the antenna device in the present disclosure could also set the feed point B at the position of the loading component 30 to form parallel feeding.

[0055] Referring to FIG.2, FIG.3 and FIG.4, as another embodiment, the radiator and the metal ground plane 20 may also be located in different planes respectively, that is, the radiator and the metal ground plane 20 are located in different planes to constitute a three-dimensional antenna structure (FIG. 4). Specifically, when the radiator and the metal ground plane 20 are located in different planes, the antenna apparatus further includes a fourth radiating branch 14 and a fifth radiating branch 15. The loading component 30 is mounted on the metal ground plane 20, the fourth radiating branch 14 is used to connect the first radiating branch 11 and the loading component 30, and the fifth radiating branch 15 is used to connect the feeding point B and a feeding port on the metal ground plane 20. By arranging the fourth radiating branch 14, it is convenient to arrange the loading component 30, and by arranging the fifth radiating branch 15, it is convenient to connect with the feeding.

[0056] The second radiating branch 12 includes a first radiating portion 121 and a second radiating portion 122, which are arranged in an L-shape. The first radiating portion 121 is configured to connect to one end of the first radiating branch 11, and the second radiating portion 122 is configured to be welded on the metal ground plane 20. Similarly, the third radiating branch 13 includes a third radiating portion 131 and a fourth radiating portion 132, which are arranged in an L-shape. The third radiating portion 131 is configured to connect to the other end of the first radiating branch 11, and the fourth radiating portion 132 is configured to be welded on the metal ground plane 20. In the present disclosure, structures of the second radiating branch 12 and the third radiating branch 13 are L-shaped to facilitate welding on the metal ground plane 20 to form a patch connection structure.

[0057] Of course, in some embodiments, the second radiating branch 12 and the third radiating branch 13 may be plugged into the metal ground plane 20 to constitute a plug-in connection structure. Specifically, a plurality of jacks are arranged on the metal ground plane 20, the other end of the second radiating branch 12 is plugged into a corresponding jack to connect with the metal ground plane 20, and the other end of the third radiating branch 13 is plugged into another corresponding jack to connect with the metal ground plane 20.

[0058] In some embodiments, the fourth radiating branch 14 includes a fifth radiating portion 141 and a sixth radiating portion 142, which are arranged in an L-shape. The fifth radiating portion 141 is configured to connect to the first radiating branch 11, and the sixth radiating portion 142 is configured to be welded on the metal ground plane 20 and electrically connecting with the loading component 30. The fifth radiating branch 15 includes a seventh radiating portion 151 and an eighth radiating portion 152, which are arranged in an L-shape. The seventh radiating portion 15 is configured to connect to the first radiating branch 11, and the eighth radiating portion 152 is configured to be welded on the metal ground plane 20 and connecting with the feeding source. Similarly, structures of the fourth radiating branch 14 and the seventh radiating portion 15 are L-shaped to facilitate welding on the metal ground plane 20.

[0059] Please refer to FIG. 5, FIG. 5 is a comparative diagram of return loss before and after configuring the loading component 30 in the antenna apparatus according to an embodiment of the present disclosure. A return loss curve before configuring the loading component 30 is shown as curve A in FIG. 5, and a return loss curve after configuring the loading component 30 is shown as curve B in FIG. 5. According to FIG. 5, before and after the loading component 30 is configured in the antenna apparatus, the return loss at different frequency points could be reduced by 5dB-22dB.

[0060] Please refer to FIG. 6, FIG. 6 is a comparative diagram of standing wave ratio before and after configuring the loading component 30 in the antenna apparatus according to an embodiment of the present disclosure. A standing wave ratio curve before configuring the loading component 30 is shown as curve C in FIG. 6, and a standing wave ratio curve after configuring the loading component 30 is shown as curve D in FIG. 6 According to FIG. 6, a radiation frequency range of the antenna apparatus before configuring the loading component 30 is 2.41GHz-2.50 GHz, a radiation frequency range of the antenna apparatus after configuring the loading component 30 is 2.36GHz-2.54GHz. By comparison, in the present disclosure, the bandwidth could be effectively expanded by configuring the loading component 30, so as to improve the performance of the antenna apparatus.

[0061] The present disclosure further provides a terminal device. The terminal device includes the antenna apparatus described above. The antenna apparatus could be used as an integrated antenna apparatus in the terminal device. Since the antenna apparatus has been described in detail in the above contents, it will not be repeated here.

[0062] Various embodiments emphasize different aspects, and undefined portions in one embodiment may reference corresponding descriptions in others.

[0063] The above provides a detailed description of the antenna apparatus disclosed in the embodiments of the present disclosure. Specific examples were used to illustrate the principles and implementations of the present disclosure. The explanations in these embodiments are intended solely to facilitate understanding of the technical solutions and core concepts of the present disclosure. Technical personnel in the field should understand that they may still modify the technical solutions described in the preceding embodiments or make equivalent substitutions to some technical features. Such modifications or replacements will not cause the essential nature of the corresponding technical solutions to depart from the scope of the technical solutions defined in the various embodiments of the present disclosure.

Claims

1. An antenna apparatus, comprising: a radiator, wherein the radiator comprises a first radiating branch, a second radiating branch, and a third radiating branch; one end of the second radiating branch is connected to one end of the first radiating branch, while one end of the third radiating branch is connected to the other end of the first radiating branch; a metal ground plane, wherein the other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane; a loading component, wherein one end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane.

2. The antenna apparatus according to claim 1, wherein the loading component comprises a resistor, an inductor, or a capacitor.

3. The antenna apparatus according to claim 1, wherein the loading component comprises a resistor, an inductor, and a capacitor.

4. The antenna apparatus according to claim 1, wherein a feed point is provided on the first radiating branch; wherein a position where an end of the loading component is connected to the first radiating branch is a loading connection point; wherein the loading connection point and the feed point are substantially symmetrical about a symmetry center which is a center of the first radiating branch as.

5. The antenna apparatus according to claim 4, wherein the radiator of the antenna apparatus is located in a same plane as the metal ground plane.

6. The antenna apparatus according to claim 4, wherein the radiator and the metal ground plane are located in different planes.

7. The antenna apparatus according to claim 5, further comprising a microstrip feed line, wherein the feed point is connected to feeding source through the microstrip feed line.

8. The antenna apparatus according to claim 6, further comprising a fourth radiating branch and a fifth radiating branch; wherein the loading component is mounted on the metal ground plane; wherein the fourth radiating branch is used to connect the first radiating branch and the loading component; wherein the fifth radiating branch is used to connect the feeding point and a feeding port on the metal ground plane.

9. The antenna apparatus according to claim 8, wherein the second radiating branch comprises a first radiating portion and a second radiating portion, the first radiating portion and the second radiating portion are arranged in an L-shape; wherein the first radiating portion is configured to connect to one end of the first radiating branch; wherein the second radiating portion is configured to be welded on the metal ground plane.

10. The antenna apparatus according to claim 9, wherein the third radiating branch comprises a third radiating portion and a fourth radiating portion, the third radiating portion and the fourth radiating portion are arranged in an L-shape; wherein the third radiating portion is configured to connect to the other end of the first radiating branch; wherein the fourth radiating portion is configured to be welded on the metal ground plane.

11. The antenna apparatus according to claim 8, wherein a plurality of jacks are arranged on the metal ground plane; wherein the other end of the second radiating branch is plugged into a corresponding jack to connect with the metal ground plane; wherein the other end of the third radiating branch is plugged into another corresponding jack to connect with the metal ground plane.

12. The antenna apparatus according to claim 11, wherein the fourth radiating branch comprises a fifth radiating portion and a sixth radiating portion, the fifth radiating portion and the sixth radiating portion are arranged in an L-shape; wherein the fifth radiating portion is configured to connect to the first radiating branch; wherein the sixth radiating portion is configured to be welded on the metal ground plane and electrically connecting with the loading component.

13. The antenna apparatus according to claim 12, wherein the fifth radiating branch comprises a seventh radiating portion and an eighth radiating portion, the seventh radiating portion and the eighth radiating portion are arranged in an L-shape; wherein the seventh radiating portion is configured to connect to the first radiating branch; wherein the eighth radiating portion is configured to be welded on the metal ground plane and connecting with the feeding source.

14. A terminal device, comprising an antenna apparatus, wherein the antenna apparatus comprising: a radiator, wherein the radiator comprises a first radiating branch, a second radiating branch, and a third radiating branch; one end of the second radiating branch is connected to one end of the first radiating branch, while one end of the third radiating branch is connected to the other end of the first radiating branch; a metal ground plane, wherein the other end of the second radiating branch and the other end of the third radiating branch are both connected to the metal ground plane, and a predetermined gap is arranged between the first radiating branch and the metal ground plane; a loading component, wherein one end of the loading component is connected to the first radiating branch, and the other end of the loading component is connected to the metal ground plane.

15. The terminal device according to claim 14, wherein the loading component comprises a resistor, an inductor, or a capacitor.

16. The terminal device according to claim 14, wherein the loading component comprises a resistor, an inductor, and a capacitor.

17. The terminal device according to claim 14, wherein a feed point is provided on the first radiating branch; wherein a position where an end of the loading component is connected to the first radiating branch is a loading connection point; wherein the loading connection point and the feed point are substantially symmetrical about a symmetry center which is a center of the first radiating branch as.

18. The terminal device according to claim 17, wherein the radiator of the antenna apparatus is located in a same plane as the metal ground plane.

19. The terminal device according to claim 17, wherein the radiator and the metal ground plane are located in different planes.

20. The terminal device according to claim 18, wherein the antenna apparatus further comprising a microstrip feed line, wherein the feed point is connected to feeding source through the microstrip feed line.

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