Antenna device

Abstract

The invention relates to an antenna device. The antenna device comprises a first substrate, a second substrate, an excitation unit, a plurality of rectangular radiation units, a plurality of circular radiation units and an impedance matching unit, the first substrate has a first bottom surface and a first top surface opposite to each other. The second substrate is arranged on the first substrate and is provided with a second bottom surface and a second top surface which are opposite to each other. The second bottom surface is connected with the first top surface. The excitation unit is arranged on the first bottom surface and comprises a tuning fork-shaped excitation body, a strip-shaped excitation body and a grid-shaped excitation body. The tuning-fork-shaped excitation body comprises a handle part and a forked part. The handle part, the strip-shaped excitation body and the grid-shaped excitation body are connected to the branch part. The rectangular radiation units, the circular radiation units and the impedance matching unit are arranged on the second top surface. The rectangular radiation units surround the circular radiation units. The circular radiation units surround the impedance matching unit.

Description

Technical Field

[0001] This invention relates to an antenna device, and more particularly to an antenna device comprising an excitation unit, a radiation unit, and an impedance matching unit. Background Technology

[0002] With the advancement of mobile communication technology, various electronic devices are constantly evolving towards greater functionality, thinner and lighter designs, and faster and more efficient data transmission. In particular, mobile communication technology is about to enter the WiFi 7 and 6G era, meeting various life applications and business needs that WiFi 6E and 5G have not yet fulfilled.

[0003] However, current antenna devices still suffer from excessively high return loss in the WiFi 7 and 6G bands, failing to meet users' communication needs for WiFi 7 and 6G. Therefore, improving the communication quality required by antenna devices in the WiFi 7 and 6G bands is one of the problems that researchers need to solve. Summary of the Invention

[0004] The present invention provides an antenna device to improve the communication quality required by the antenna device in WiFi 7 and 6G frequency bands.

[0005] An embodiment of the present invention discloses an antenna device comprising a first substrate, a second substrate, an excitation unit, a plurality of rectangular radiating elements, a plurality of circular radiating elements, and an impedance matching unit. The first substrate has a first bottom surface and a first top surface facing away from each other. The second substrate is stacked on the first substrate and has a second bottom surface and a second top surface facing away from each other. The second bottom surface is connected to the first top surface. The excitation unit is disposed on the first bottom surface and includes a tuning fork-shaped excitation element, a strip-shaped excitation element, and two grid-shaped excitation elements. The tuning fork-shaped excitation element includes a handle and a bifurcation. The handle is connected to one side of the bifurcation. The strip-shaped excitation element and the two grid-shaped excitation elements are connected to the side of the bifurcation away from the handle. The bifurcation surrounds the strip-shaped excitation element and the two grid-shaped excitation elements. The two grid-shaped excitation elements are located on opposite sides of the strip-shaped excitation element. The rectangular radiating elements are disposed on the second top surface and arranged in an array. The circular radiating elements are disposed on the second top surface and arranged in an array. The rectangular radiating elements surround these circular radiating elements. Impedance matching elements are disposed on the second top surface. These circular radiating elements surround the impedance matching elements. The spacing between each circular radiating element and the impedance matching element is equal.

[0006] According to the antenna device of the above embodiment, since the bifurcation portion surrounds the strip-shaped exciter and two grid-shaped exciters, and the two grid-shaped exciters are located on opposite sides of the strip-shaped exciter, and these rectangular radiating elements surround these circular radiating elements, these circular radiating elements surround the impedance matching elements, and the spacing between each circular radiating element and the impedance matching element is equal, the antenna device can excite frequency bands that cover WiFi 7 and 6G, and reduce the return loss in this frequency band to meet the user's communication needs for WiFi 7 and 6G. In this way, the communication quality required by the antenna device in the WiFi 7 and 6G frequency bands can be improved.

[0007] The above description of the invention and the following description of the embodiments are intended to demonstrate and explain the principles of the invention, and to provide a further explanation of the scope of the patent application. Attached Figure Description

[0008] Figure 1 This is a three-dimensional schematic diagram of an antenna device according to an embodiment of the present invention.

[0009] Figure 2 for Figure 1 An exploded view of the antenna device.

[0010] Figure 3 for Figure 1 A planar perspective view of the antenna device.

[0011] Figure 4 for Figure 1 A plan view of the first bottom surface of the antenna device.

[0012] Figure 5 for Figure 1 A plan view of the first top surface of the antenna device.

[0013] Figure 6 for Figure 1 A plan view of the second top surface of the antenna device.

[0014] Figure 7 for Figure 1 Line graph of return loss of antenna device.

[0015] Attached image annotations:

[0016] 10: Antenna device

[0017] 20: First substrate

[0018] 21: First base

[0019] 22: First top surface

[0020] 30: Second substrate

[0021] 31: Second bottom surface

[0022] 32: Second top surface

[0023] 40: Excitation Unit

[0024] 41: Tuning fork-shaped exciter

[0025] 411: Handle

[0026] 4111: Feed point

[0027] 412: Bifurcation

[0028] 4121: First Excitation Stage

[0029] 4122: Second Excitation Stage

[0030] 42: Strip-shaped exciter

[0031] 43: Gate-shaped exciter

[0032] 431: Third Excitation Stage

[0033] 432: Fourth Excitation Stage

[0034] 50: Signal Coupling Unit

[0035] 51: Missing slot

[0036] 60: Rectangular radiating unit

[0037] 70: Circular radiating unit

[0038] 80: Impedance matching unit

[0039] D1~D7: Spacing

[0040] L1, L3, L6, L7, L8: Length

[0041] R: Diameter

[0042] T1, T2: Thickness

[0043] W1~W5,W7,W8: Width Detailed Implementation

[0044] Please see Figure 1 and Figure 2 . Figure 1 This is a three-dimensional schematic diagram of an antenna device according to an embodiment of the present invention. Figure 2 for Figure 1 An exploded view of the antenna device.

[0045] The antenna device 10 of this embodiment is applicable, for example, to the frequency bands of WiFi 7 (2.402 GHz to 2.494 GHz, 5.03 GHz to 7.125 GHz) and the frequency bands of 6G Ku-band (10.7 GHz to 18 GHz), and includes a first substrate 20, a second substrate 30, an excitation unit 40, a signal coupling unit 50, a plurality of rectangular radiating units 60, a plurality of circular radiating units 70, and an impedance matching unit 80.

[0046] The first substrate 20 and the second substrate 30 are made of, for example, glass fiber. The first substrate 20 has a first bottom surface 21 and a first top surface 22 facing away from each other. The second substrate 30 is stacked on the first substrate 20 and has a second bottom surface 31 and a second top surface 32 facing away from each other. The second bottom surface 31 is connected to the first top surface 22. The thickness T1 of the first substrate 20 is, for example, 0.4 mm, and the thickness T2 of the second substrate 30 is, for example, 1.6 mm.

[0047] Please refer to the following: Figures 3 to 6 . Figure 3 for Figure 1 A planar perspective view of the antenna device. Figure 4 for Figure 1 A plan view of the first bottom surface of the antenna device. Figure 5 for Figure 1 A plan view of the first top surface of the antenna device. Figure 6 for Figure 1 A plan view of the second top surface of the antenna device.

[0048] The excitation unit 40 is made of, for example, copper foil and is used to excite the WiFi 7 band and the 6G Ku-band band. The excitation unit 40 is disposed on the first bottom surface 21 and includes a tuning fork-shaped exciter 41, a strip-shaped exciter 42, and two grid-shaped exciters 43. The tuning fork-shaped exciter 41 includes a handle 411 and a branch 412. One end of the handle 411 is connected to one side of the branch 412. The other end of the handle 411 has a feed point 4111. The feed point 4111 is used to feed in a signal and transmits the signal to the branch 412 through the handle 411.

[0049] In detail, the bifurcation portion 412 includes a first excitation section 4121 and two second excitation sections 4122. The handle portion 411 is connected to one side of the first excitation section 4121. The two second excitation sections 4122 are respectively connected to the opposite ends of the first excitation section 4121, and are located on opposite sides of the first excitation section 4121 from the handle portion 411.

[0050] A strip-shaped exciter 42 and two grid-shaped exciters 43 are connected to the first excitation segment 4121 on the side away from the handle 411. The first excitation segment 4121 and the two second excitation segments 4122 together surround the strip-shaped exciter 42 and the two grid-shaped exciters 43, with the strip-shaped exciter 42 and the two grid-shaped exciters 43 located between the two second excitation segments 4122. The two grid-shaped exciters 43 are located on opposite sides of the strip-shaped exciter 42. That is, the strip-shaped exciter 42 is located between the two grid-shaped exciters 43.

[0051] In detail, each grid-shaped exciter 43 includes a third excitation segment 431 and a plurality of fourth excitation segments 432. The third excitation segment 431 is connected to the first excitation segment 4121. The two second excitation segments 4122, the two third excitation segments 431, and the strip-shaped exciter 42 are, for example, parallel. These fourth excitation segments 432 are respectively connected to opposite sides of the two third excitation segments 431. These fourth excitation segments 432 are, for example, parallel to the first excitation segment 4121. The lengths of the two third excitation segments 431 and the lengths of the strip-shaped exciter 42 are, for example, smaller than the lengths of the two second excitation segments 4122.

[0052] The signal coupling unit 50 is made of copper foil, for example. The signal coupling unit 50 is disposed on the first top surface 22 and has a notch 51. The notch 51 is, for example, rectangular. The notch 51 is separated from the side of the first substrate 20. The first excitation segment 4121, two second excitation segments 4122, strip-shaped exciter 42, and two gate-shaped exciters 43 correspond, for example, to the notch 51.

[0053] These rectangular radiating units 60 are made of, for example, copper foil and are square in shape. These rectangular radiating units 60 are disposed on the second top surface 32 and are arranged in an array, for example. These circular radiating units 70 are made of, for example, copper foil. These circular radiating units 70 are disposed on the second top surface 32 and are arranged in an array, for example. These rectangular radiating units 60 surround these circular radiating units 70. After the signal is excited by the self-excitation unit 40, it is coupled to these rectangular radiating units 60 and these circular radiating units 70 by the signal coupling unit 50, and radiated outward through these rectangular radiating units 60 and these circular radiating units 70.

[0054] Impedance matching element 80 is made of copper foil and is, for example, dart-shaped. Specifically, impedance matching element 80 has multiple bumps. The connection between any two adjacent bumps is, for example, an arc recessed away from the adjacent circular radiating element 70. Impedance matching element 80 is disposed on the second top surface 32. These circular radiating elements 70 surround the impedance matching element 80. The spacing between each circular radiating element 70 and the impedance matching element 80 is, for example, equal. In this way, the return loss of the antenna device 10 can be reduced to improve the impedance matching effect.

[0055] The strip-shaped exciter 42 at least partially corresponds to the impedance matching unit 80. Furthermore, the fourth excitation segment 432 closest to the first excitation segment 4121 and the fourth excitation segment 432 furthest from the first excitation segment 4121 at least partially correspond to these circular radiation units 70.

[0056] In this embodiment, since the bifurcation portion 412 surrounds the strip-shaped exciter 42 and the two grid-shaped exciters 43, with the two grid-shaped exciters 43 located on opposite sides of the strip-shaped exciter 42, and the rectangular radiating elements 60 surround the circular radiating elements 70, which in turn surround the impedance matching elements 80, with equal spacing between each circular radiating element 70 and the impedance matching element 80, the antenna device 10 can excite frequency bands covering WiFi 7 and 6G, and reduce return loss in these frequency bands to meet users' communication needs for WiFi 7 and 6G. In this way, the communication quality required by the antenna device 10 in the WiFi 7 and 6G frequency bands can be improved.

[0057] Furthermore, by having the strip-shaped exciter 42 at least partially correspond to the impedance matching unit 80, and the fourth exciter 432 closest to the first exciter 4121 and the fourth exciter 432 furthest from the first exciter 4121 respectively at least partially correspond to these circular radiating units 70, the antenna device 10 can further excite a frequency band that can cover WiFi 7 and 6G, and further reduce the return loss in this frequency band.

[0058] In this embodiment, the length L1 of the handle 411 is, for example, 14.5 mm. The width W1 of the handle 411 is, for example, 1.95 mm. The width W2 of the first excitation segment 4121 is, for example, 3.225 mm. The length L3 of each second excitation segment 4122 is, for example, 11.975 mm. The width W3 of each second excitation segment 4122 is, for example, 2.5 mm. The width W4 of the two third excitation segments 431 and the width W5 of the strip-shaped excitation body 42 are, for example, 0.6 mm. The length L6 of these fourth excitation segments 432 is, for example, 2 mm.

[0059] In this embodiment, the length L7 of the notch 51 is, for example, 21 mm, and the width W7 of the notch 51 is, for example, 16.5 mm. The distances D1 and D2 between the two long sides of the notch 51 and the two side sides of the adjacent first substrate 20 are, for example, 13 mm and 14.5 mm, respectively.

[0060] In this embodiment, the length L8 and width W8 of each rectangular radiating element 60 are, for example, 7 mm. The distance D3 between any two adjacent rectangular radiating elements 60 is, for example, 2 mm. The diameter R of each circular radiating element 70 is, for example, 7 mm. The distance D4 between any two adjacent circular radiating elements 70 is, for example, 2 mm. Furthermore, the distance D5 between any two adjacent rectangular radiating elements 60 and circular radiating elements 70 is, for example, 2 mm.

[0061] In this embodiment, the distance D6 between any two opposing protrusions is, for example, 2.75 mm, and the distance D7 between each circular radiating unit 70 and the impedance matching unit 80 is, for example, 1.3 mm.

[0062] In this embodiment, the connection between any two adjacent protrusions is an arc that is concave in the direction away from the adjacent circular radiating element 70, but this is not a limitation. In other embodiments, the connection between any two adjacent protrusions can also be a straight line. That is, the impedance matching element can also be, for example, rhomboid in shape.

[0063] Please refer to the following: Figure 7 . Figure 7 for Figure 1 The graph shows the return loss of the antenna device. In this embodiment, in the WiFi 7 frequency bands (2.402 GHz to 2.494 GHz, 5.03 GHz to 7.125 GHz) or the 6G Ku-band frequency bands (10.7 GHz to 18 GHz), the return loss of the antenna device 10 in this embodiment is below -6 dB for most frequency bands, except for a few bands where the return loss is slightly higher than -6 dB. In some bands, the return loss is even lower than -10 dB. That is, through the aforementioned structural design, the antenna device 10 in this embodiment has good impedance matching.

[0064] Furthermore, generally speaking, the higher the antenna gain, the more concentrated the antenna radiation, which allows the signal to travel a greater distance in a specific direction. In the aforementioned frequency bands, the antenna device 10 of this embodiment has a gain of 3.59 dBi at 2.4 GHz in WiFi 7 and a gain of 4.44 dBi at 15 GHz in 6G Ku-band.

[0065] According to the antenna device of the above embodiment, since the bifurcation portion surrounds the strip-shaped exciter and two grid-shaped exciters, and the two grid-shaped exciters are located on opposite sides of the strip-shaped exciter, and these rectangular radiating elements surround these circular radiating elements, these circular radiating elements surround the impedance matching elements, and the spacing between each circular radiating element and the impedance matching element is equal, the antenna device can excite frequency bands that cover WiFi 7 and 6G, and reduce the return loss in this frequency band to meet the user's communication needs for WiFi 7 and 6G. In this way, the communication quality required by the antenna device in the WiFi 7 and 6G frequency bands can be improved.

[0066] Furthermore, by having the strip-shaped exciter at least partially correspond to the impedance matching unit, and the fourth exciter closest to the first exciter and the fourth exciter furthest from the first exciter respectively at least partially correspond to these circular radiating units, the antenna device can be further made to excite frequency bands that can cover WiFi 7 and 6G, and the return loss in this frequency band can be further reduced.

[0067] Although the present invention has been disclosed above with reference to the foregoing embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be determined by the claims defined in the appended specification.

Claims

1. An antenna device, characterized in that, include: A first substrate having a first bottom surface and a first top surface facing away from each other; A second substrate is stacked on the first substrate and has a second bottom surface and a second top surface facing each other, wherein the second bottom surface is connected to the first top surface; An excitation unit is disposed on the first bottom surface and includes a tuning fork-shaped exciter, a strip-shaped exciter, and two grid-shaped exciters. The tuning fork-shaped exciter includes a handle and a bifurcated portion. The handle is connected to one side of the bifurcated portion. The strip-shaped exciter and the two grid-shaped exciters are connected to the side of the bifurcated portion away from the handle. The bifurcated portion surrounds the strip-shaped exciter and the two grid-shaped exciters. The two grid-shaped exciters are respectively located on opposite sides of the strip-shaped exciter. Multiple rectangular radiating elements are disposed on the second top surface and arranged in an array; Multiple circular radiating units are disposed on the second top surface and arranged in an array, with multiple rectangular radiating units surrounding the multiple circular radiating units; as well as An impedance matching unit is disposed on the second top surface, and the plurality of circular radiating units surround the impedance matching unit, wherein the spacing between each circular radiating unit and the impedance matching unit is equal.

2. The antenna device according to claim 1, characterized in that, The bifurcation portion includes a first excitation section and two second excitation sections. The handle is connected to one side of the first excitation section, and the two second excitation sections are respectively connected to the opposite ends of the first excitation section and are located on opposite sides of the first excitation section from the handle. The strip-shaped exciter and the two grid-shaped exciters are connected to the first excitation section and located between the two second excitation sections.

3. The antenna device according to claim 2, characterized in that, It also includes a signal coupling unit disposed on the first top surface and having a notch. The notch is separated from the side of the first substrate, and the first excitation segment, the two second excitation segments, the strip exciter and the two gate exciters correspond to the notch.

4. The antenna device according to claim 3, characterized in that, The notch is rectangular, with a length of 21 mm and a width of 16.5 mm. The distances between the two long sides of the notch and the two side sides of the adjacent first substrate are 13 mm and 14.5 mm, respectively.

5. The antenna device according to claim 2, characterized in that, Each of the grid-shaped exciter includes a third excitation segment and a plurality of fourth excitation segments. The third excitation segment is connected to the first excitation segment. The two second excitation segments, the two third excitation segments, and the strip-shaped exciter are parallel to each other. The plurality of fourth excitation segments are respectively connected to opposite sides of the two third excitation segments. The plurality of fourth excitation segments are parallel to the first excitation segment. The strip-shaped exciter at least partially corresponds to the impedance matching unit. The fourth excitation segment closest to the first excitation segment and the fourth excitation segment furthest from the first excitation segment at least partially correspond to the plurality of circular radiation units.

6. The antenna device according to claim 5, characterized in that, The handle is 14.5 mm long and 1.95 mm wide. The first excitation segment is 3.225 mm wide. Each second excitation segment is 11.975 mm long and 2.5 mm wide. The width of the third excitation segment and the width of the strip-shaped exciter are both 0.6 mm. The length of the plurality of fourth excitation segments is 2 mm.

7. The antenna device according to claim 1, characterized in that, The impedance matching unit has multiple bumps, and the connection between any two adjacent bumps is either a straight line or an arc that is recessed in the direction away from the adjacent circular radiating unit, and the distance between any two opposite bumps is 2.75 mm.

8. The antenna device according to claim 1, characterized in that, Each of the rectangular radiating elements has a length and width of 7 mm, and the distance between any two adjacent rectangular radiating elements is 2 mm.

9. The antenna device according to claim 1, characterized in that, Each of the circular radiating units has a diameter of 7 mm, and the distance between any two adjacent circular radiating units is 2 mm.

10. The antenna device according to claim 1, characterized in that, The distance between each of the circular radiating elements and the impedance matching element is 1.3 mm.

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