5G broadband antenna

Abstract

The utility model relates to the technical field of antennas, in particular to a 5G broadband antenna, which comprises a PCB (printed circuit board) base material, a first resonance arm and a second resonance arm, the first resonance arm and the second resonance arm are arranged on the upper surface of the PCB base material, and both the first resonance arm and the second resonance arm are copper-clad wiring areas; the first resonance arm and the second resonance arm are arranged up and down and are of an axial symmetry structure, the first resonance arm is located above the second resonance arm, and the first resonance arm and the second resonance arm are both bendable resonance arms; each of the first resonance arm and the second resonance arm includes a plurality of chamfers and a plurality of slits. The antenna covers the 5G NR FR1 frequency band and is compatible with the 2G / 3G / 4G frequency band, the high-bandwidth design is achieved, the antenna structure is simple, the cost is low, axial symmetry is basically achieved on the physical structure, the direction of resonance current is optimized, the radiation pattern of the antenna is uniform, and the broadband efficiency of the antenna is high.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a 5G broadband antenna. Background Art

[0002] The FR1 (Frequency Range 1) frequency band requirements for the fifth-generation mobile communications (5G NR) are: low-frequency range 703MHz-915MHz, mid-frequency range 1710MHz-2690MHz, and high-frequency range 3300MHz-5000MHz. Furthermore, the fifth-generation mobile communications require compatibility with previous generations of 2G / 3G / 4G communications. The 4G frequency bands are 698MHz-960MHz and 1710MHz-2690MHz.

[0003] To meet the aforementioned frequency band requirements for fifth-generation mobile communications (5G NR), existing 5G antenna structures typically design the 5G module's wideband RF branches separately, with each branch covering a specific frequency range. For example, one branch covers the low-frequency range, one branch covers the mid-frequency range, and one branch covers the high-frequency range. Separate RF branch designs often require control timing and switching. Consequently, existing 5G antenna structures are complex, costly, and inefficient in achieving wideband performance. Utility Model Content

[0004] The embodiments of the present application provide a 5G broadband antenna to solve the technical problems of complex structural design, high cost, and poor broadband efficiency of 5G antennas in the prior art. It covers the 5G NR FR1 frequency band and is backward compatible with the 2G / 3G / 4G frequency bands, realizes a high-bandwidth design, has a simple antenna structure, is low in cost, and is basically axially symmetrical in physical structure, thereby optimizing the direction of the resonant current, making the radiation pattern of the antenna uniform, and achieving high broadband efficiency.

[0005] In a first aspect, an embodiment of the present invention provides a 5G broadband antenna, comprising: a PCB substrate, a first resonant arm and a second resonant arm disposed on an upper surface of the PCB substrate, wherein the first resonant arm and the second resonant arm are both copper-clad routing areas;

[0006] The first resonant arm and the second resonant arm are arranged in an upper and lower arrangement and have an axisymmetric structure, wherein the first resonant arm is located above the second resonant arm, and both the first resonant arm and the second resonant arm are bendable resonant arms;

[0007] The first resonant arm and the second resonant arm each include a plurality of cut corners and a plurality of slots.

[0008] Preferably, the first resonant arm comprises: a bridge gap, two first cut corners and two first branch gaps;

[0009] The two first branch gaps are located above the two first cut corners and the bridge gap;

[0010] A first branch gap is correspondingly provided above each first cut corner;

[0011] The bridge gap is located between the two first cut corners and connects the two first cut corners.

[0012] Preferably, the two first cut corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner.

[0013] Preferably, the two first branch gaps are respectively located on the left and right sides of the upper surface and are arranged axially symmetrically; each first branch gap has an L-shaped structure;

[0014] Each of the first branch gaps includes: a first vertical gap and a first horizontal gap;

[0015] A first end of the first horizontal slit faces a side edge of the PCB substrate, and a second end of the first horizontal slit is connected to one end of the first vertical slit;

[0016] The other end of the first vertical slit faces the first cutting angle;

[0017] Wherein, the second ends of the first horizontal slots of the two first branch slots are adjacently arranged.

[0018] Preferably, the first resonant arm further comprises: a corner slot provided on each of the first corners, the corner slots being arranged axially symmetrically, one end of the corner slot being connected to the first corner, and the other end being directed toward the first branch slot.

[0019] Preferably, the second resonant arm comprises: two rectangular cut corners, two second cut corners and two connected second branch gaps;

[0020] The two rectangular cut corners are located above the two second branch gaps and below the first resonant arm, and the two rectangular cut corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner;

[0021] Two second branch slits are located between two second cut corners, and each second branch slit is corresponding to one second cut corner;

[0022] The two second cut corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner.

[0023] Preferably, the two second branch gaps are respectively located on the left and right sides of the upper surface and are arranged axially symmetrically; each second branch gap has a J-shaped structure;

[0024] Each of the second branch gaps includes: a second vertical gap, a second horizontal gap, and a third vertical gap;

[0025] A first end of the second horizontal slit is connected to a first end of the second vertical slit, and a second end of the second horizontal slit is connected to one end of the third vertical slit;

[0026] The other end of the third vertical slit faces the corresponding second cutting angle;

[0027] The second ends of the second vertical slots of the two second branch slots are connected to each other, and the second vertical slots of the two second branch slots are adjacent to each other;

[0028] The lengths of the third vertical gaps of each of the second branch gaps are inconsistent.

[0029] Preferably, it further includes: a feed source, wherein the feed source is located in the bridge gap.

[0030] Preferably, the PCB substrate is a single-layer PCB substrate.

[0031] Preferably, the material of the PCB substrate is FR4 material.

[0032] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0033] In an embodiment of the present invention, two copper-clad wiring areas are obtained by copper-clad wiring on the upper surface of the PCB, thereby realizing the arrangement of two resonant arms on the upper surface of the PCB. The two resonant arms are respectively the first resonant arm and the second resonant arm. The first resonant arm and the second resonant arm are arranged in an upper and lower arrangement and are axially symmetrical, wherein the first resonant arm is located above the second resonant arm, and the first resonant arm and the second resonant arm are both bendable resonant arms. The first resonant arm and the second resonant arm both include multiple cut corners and multiple slits. Since each resonant arm has multiple slits and cut corners, and each resonant arm can be bent, high-frequency currents flow through these slits, cut corners and the peripheral path of the resonant wall itself to form resonances of different frequencies, thereby meeting the frequency band requirements of the 5G communication antenna, covering the 5G NR FR1 frequency band and being backward compatible with the 2G / 3G / 4G frequency bands, and realizing a high-bandwidth design. In addition, the antenna structure of the embodiment of the present invention is simple and low-cost, avoiding complex branches to achieve a broadband design. The antenna of the embodiment of the present invention is substantially axially symmetrical in physical structure, thereby optimizing the direction of the resonant current and achieving a uniform radiation pattern. Thus, the antenna structure of the embodiment of the present invention can greatly improve broadband efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference figures denote the same components. In the accompanying drawings:

[0035] Figure 1 The figure shows a schematic structural diagram of a 5G broadband antenna in an embodiment of the present invention;

[0036] Figure 2 A front view schematic diagram of a 5G broadband antenna in an embodiment of the present utility model is shown;

[0037] Figure 3 A test diagram of eight resonance points of a 5G broadband antenna in an embodiment of the present invention is shown;

[0038] Figure 4 A test diagram of the 5G broadband antenna in the embodiment of the present invention in the range of 1.62 GHz to 5.00 GHz is shown;

[0039] Figure 5 The 705MHz far-field 3D radiation pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0040] Figure 6 The 705MHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0041] Figure 7 The 780MHz far-field 3D radiation pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0042] Figure 8 The 780MHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0043] Figure 9 The 900MHz far-field 3D radiation pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0044] Figure 10 The 900MHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0045] Figure 11 The 1.335 GHz far-field 3D radiation pattern of the 5G broadband antenna in an embodiment of the present invention is shown;

[0046] Figure 12 The 1.335 GHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0047] Figure 13 The 1.630 GHz far-field 3D radiation pattern of the 5G broadband antenna in an embodiment of the present invention is shown;

[0048] Figure 14 The 1.630 GHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0049] Figure 15 The 1.915 GHz far-field 3D radiation pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0050] Figure 16 The 1.915 GHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0051] Figure 17 The 3.170 GHz far-field 3D radiation pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0052] Figure 18 The 3.170 GHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown;

[0053] Figure 19 The 4.615 GHz far-field 3D radiation pattern of the 5G broadband antenna in an embodiment of the present invention is shown;

[0054] Figure 20 The 4.615 GHz far-field EH surface lobe pattern of the 5G broadband antenna in the embodiment of the present invention is shown.

[0055] In the accompanying drawings, 100 is a PCB substrate; 200 is a first resonant arm; 300 is a second resonant arm; 400 is a feed source;

[0056] 210, first cut corner; 220, first branch gap; 230, bridge gap; 211, cut corner gap; 221, first vertical gap; 222, first horizontal gap;

[0057] 310, rectangular cut corner; 320, second branch gap; 330, second cut corner; 321, second vertical gap; 322, second horizontal gap; 323, third vertical gap. DETAILED DESCRIPTION

[0058] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0059] Example 1

[0060] The first embodiment of the present invention provides a 5G broadband antenna, such as Figure 1 As shown, the PCB substrate 100 includes a first resonant arm 200 and a second resonant arm 300 disposed on the upper surface of the PCB substrate 100, wherein the first resonant arm 200 and the second resonant arm 300 are both copper-clad routing areas. The first resonant arm 200 and the second resonant arm 300 are arranged in an upper and lower arrangement and form an axisymmetric structure, wherein the first resonant arm 200 is located above the second resonant arm 300. The first resonant arm 200 and the second resonant arm 300 are both bendable resonant arms. The first resonant arm 200 and the second resonant arm 300 each include multiple cut corners and multiple slots. The cut corners and slots of each resonant arm are used to allow current to flow through to form resonances of different frequencies, thereby obtaining different resonant frequencies.

[0061] It should be noted that the PCB (Printed Circuit Board) substrate of this embodiment is preferably a single-layer PCB substrate 100. The material of PCB substrate 100 is preferably FR4 material. FR4 material is a composite material made of epoxy resin and glass fiber, with excellent electrical and mechanical properties. FR4 material is widely used in circuit boards, insulating components of electronic and electrical equipment, various switches, and drilling pads. Its main components are epoxy resin and glass fiber cloth. It is formed through high-temperature and high-pressure hot pressing, and has characteristics such as heat resistance, moisture resistance, and flame retardancy. The material, size, and layout of PCB substrate 100 can be customized according to actual needs. This embodiment provides an example of a PCB substrate 100. The parameters of this example PCB substrate 100 are: a dielectric constant range of 4.2-4.6, a loss factor range of 0.015-0.025, and a board thickness range of 0.8-1.2. These parameters, as well as the board length and width ranges, can be customized according to actual needs. The specific parameters of the optional exemplary PCB substrate 100 are as follows: dielectric constant of 4.6, loss angle of 0.019, board thickness of 1.0 mm, and board surface of 149.0 mm (length) * 35.0 mm (width).

[0062] In this embodiment, two copper-clad trace areas are formed on the top surface of the PCB, thereby enabling the provision of two resonant arms on the top surface of the PCB. These two resonant arms are a first resonant arm 200 and a second resonant arm 300. The first resonant arm 200 and the second resonant arm 300 are arranged in an axisymmetric configuration, with the first resonant arm 200 positioned above the second resonant arm 300. Both the first resonant arm 200 and the second resonant arm 300 are bendable resonant arms. The first resonant arm 200 and the second resonant arm 300 each include multiple cut corners and multiple slots. Because each resonant arm has multiple slots and cut corners, and each resonant arm is bendable, high-frequency current flowing through these slots, cut corners, and the peripheral path of the resonant wall itself resonates at different frequencies, thereby meeting the frequency band requirements of 5G communication antennas, covering the 5GNR FR1 band and being backward compatible with the 2G / 3G / 4G bands, achieving a high-bandwidth design. Furthermore, the antenna structure of this embodiment is simple and low-cost, avoiding complex branch circuits to achieve a broadband design. The antenna of this embodiment is substantially axially symmetrical in physical structure, thereby optimizing the direction of the resonant current and achieving a uniform radiation pattern. Thus, the antenna structure of this embodiment can greatly improve broadband efficiency.

[0063] Next, combine Figure 1 The 5G broadband antenna structure of this embodiment is described in detail:

[0064] like Figure 2As shown, the first resonant arm 200 includes a bridge gap 230, two first cut corners 210, and two first branch gaps 220. The two first branch gaps 220 are located above the two first cut corners 210 and the bridge gap 230. A first branch gap 220 is correspondingly provided above each first cut corner 210. The bridge gap 230 is located between the two first cut corners 210 and connects the two first cut corners 210.

[0065] The two first cut corners 210 are located on the left and right sides of the upper surface, respectively, and are arranged axially symmetrically. The shape of the first cut corner 210 can be optionally rectangular. The first cut corner 210 is used to provide a resonant path and can also change the length of the feeding surface, thereby adjusting the input impedance of the second resonant arm 300, that is, controlling the input impedance of the feeding current to improve the overall S11 parameter. The antenna S11 parameter is one of the S parameters and represents the return loss characteristics. The loss dB value and impedance characteristics are generally observed using a network analyzer.

[0066] The two first branch slots 220 are located on the left and right sides of the upper surface and are arranged symmetrically. Each first branch slot 220 has an L-shaped structure. Each first branch slot 220 includes: a first vertical slot 221 and a first horizontal slot 222.

[0067] The first end of the first horizontal slit 222 faces the side of the PCB substrate 100, and the second end of the first horizontal slit 222 connects to one end of the first vertical slit 221. The other end of the first vertical slit 221 faces the first cut corner 210. The second ends of the first horizontal slits 222 of the two first branch slits 220 are adjacent to each other.

[0068] The first resonant arm 200 further includes a cut-corner slot 211 provided on each first cut corner 210. The cut-corner slots 211 are arranged axially symmetrically, with one end of the cut-corner slot 211 connected to the first cut corner 210 and the other end facing the first branch slot 220. The cut-corner slots 211 are primarily used to form a high-frequency resonant path.

[0069] The second resonant arm 300 includes two rectangular corner cuts 310, two second corner cuts 330, and two connected second branch slots 320. The rectangular corner cuts 310 are rectangular. They are located above the two second branch slots 320 and below the first resonant arm 200, meaning each rectangular corner cut 310 is located below a first corner cut 210. The two rectangular corner cuts 310 are located on the left and right sides of the upper surface, respectively, and are arranged axially symmetrically. The rectangular corner cuts 310 provide a resonant path and can also change the length of the feed surface, thereby adjusting the input impedance of the second resonant arm 300, thereby controlling the input impedance of the feed current and improving the overall S11 parameter. The two second branch slots 320 are located between the two second corner cuts 330, with each second branch slot 320 corresponding to a second corner cut 330. The two second branch slots 320 can be located above the two second corner cuts 330. The two second cut corners 330 are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner.

[0070] like Figure 2 In one example, one second cut corner 330 is located at the lower left corner of the upper surface of the PCB substrate 100, and another second cut corner 330 is located at the lower right corner of the upper surface of the PCB substrate 100. The shape of the second cut corner 330 can be triangular. The second cut corner 330 is used to adjust the path length of the current flow, thereby fine-tuning the resonant frequency.

[0071] The two second branch slits 320 are located on the left and right sides of the upper surface, respectively, and are arranged axially symmetrically. Each second branch slit 320 has a J-shaped structure. Each second branch slit 320 includes: a second vertical slit 321, a second horizontal slit 322, and a third vertical slit 323. The first end of the second horizontal slit 322 is connected to the first end of the second vertical slit 321, and the second end of the second horizontal slit 322 is connected to one end of the third vertical slit 323. The other end of the third vertical slit 323 faces the corresponding second cut corner 330.

[0072] The second ends of the second vertical slots 321 of the two second branch slots 320 are connected to each other, and the second vertical slots 321 of the two second branch slots 320 are arranged adjacent to each other. The lengths of the third vertical slots 323 of each second branch slot 320 are not consistent. Figure 2 As shown, the second ends of the second vertical slits 321 of the two second branch slits 320 are located between the two second cut corners 330. The connected bottom edges of the second ends of the second vertical slits 321 of the two second branch slits 320 are flush with the bottom edges of the second cut corners 330 and are both located at the bottom edge of the PCB substrate 100. The third vertical slit 323 of the second branch slit 320 on the right is longer than the third vertical slit 323 of the first branch slit 220 on the left.

[0073] The 5G broadband antenna of this embodiment further includes a feed source 400, which is located in the bridge gap 230. Optionally, the feed source 400 is located on the central axis of the bridge gap 230. The feed source 400 simulates a real-world coaxial cable. The upper end of the feed source 400 is connected to the inner core of the coaxial feed line, and the lower end of the feed source 400 is connected to the outer core of the coaxial feed line. That is, the inner core of the coaxial line is welded to the first resonant arm 200, and the outer core is welded to the second resonant arm 300. The frequency band of the 5G broadband antenna of this embodiment is 670MHz to 960MHz and 1.30GHz to 5.12GHz.

[0074] Therefore, the antenna of this embodiment has a simple overall structure and low cost, can cover the 5G NR FR1 frequency band, and is backward compatible with the 2G / 3G / 4G frequency bands, enabling a high-bandwidth design. Furthermore, the physical structure is essentially axially symmetrical, thereby optimizing the direction of the resonant current, making the antenna's radiation pattern uniform and its broadband efficiency high.

[0075] A brief explanation of traditional antennas is also needed to facilitate understanding of the antennas in this embodiment. Fifth-generation mobile communications (5G NR) FR1 requires a wide frequency band. Traditional antennas typically employ a multi-branch design to achieve resonance in multiple frequency bands to achieve wide frequency coverage. Specifically, each branch of a traditional antenna design covers a specific frequency range. However, these structural branches are difficult to achieve geometric symmetry, resulting in asymmetric resonant current flow, distorting the antenna radiation pattern and preventing omnidirectional coverage. In actual applications, signal reception is better in directions with high gain, while signal reception is weaker in directions with low gain. Furthermore, for general cellular networks, which prioritize reception, antenna requirements are less stringent. Typically, an S11 value of less than -6dB within the corresponding frequency band is required, meaning a VSWR (voltage standing wave ratio) of less than 3. Under these parameters, the antenna's radiation efficiency fluctuates between 30% and 40%, and conventional 5G antennas are generally designed to meet this minimum standard.

[0076] The resonance principle of the 5G broadband antenna of this embodiment: under the same dielectric conditions, the total length of each path through which the current flows corresponds to a resonant frequency point f0. The shorter the path through which the resonant current flows, that is, the shorter the antenna resonant arm, the higher the corresponding f0 frequency generated. The longer the path through which the resonant current flows, that is, the longer the antenna resonant arm, the lower the corresponding f0 frequency generated. Due to the influence of its own frequency doubling, for an unbent resonant arm, while generating local oscillation at f0, it will also generate frequency doubling resonance near odd-numbered frequency doubling points such as 3f0, 5f0, 7f0... If the resonant arm is bent, the odd-numbered resonant points before the bend will shift left and right, that is, by bending, while generating resonance at f0, the frequency doubling resonance can also be controlled to fall on other desired designed frequency points.

[0077] like Figure 3 and Figure 4 As shown, the 5G broadband antenna of this embodiment is tested. Figure 3 and 4 The horizontal axes represent the operating frequencies of the 5G broadband antenna of this embodiment. Figure 3 and 4 The horizontal axis represents the S11 parameter of the 5G broadband antenna of this embodiment, in dB. Figure 3 In the spectrum, there are 8 resonance points at 705MHz, 780MHz, 900MHz, 1.335GHz, 1.630GHz, 1.915GHz, 3.170GHz and 4.615Ghz. Figure 3 In them, they are represented by m1, m2, m3, m4, m5, m6, m7 and m8 respectively. Figure 3 The horizontal and vertical coordinates of each resonance point m are also expressed, such as m1 (0.7050 GHz, -18.7989 dB), and so on. Each resonance point has a certain bandwidth. These are connected together to achieve a wide frequency range of 670 MHz to 960 MHz and 1.30 GHz to 5.12 GHz. Within this wide frequency range, S11 < -6 dB, or VSWR < 3, is achieved. This creates good resonance, covers the full 5G NR FR1 frequency band, and is backward compatible with 2G, 3G, and 4G, achieving a broadband antenna design.

[0078] In particular, such as Figure 4 As shown, within the 1.62GHz to 5.00GHz range, S11 < -10dB, or VSWR < 2. This range corresponds to the mid-to-high primary radiation frequency band of 5G NR FR1, with high transmission throughput. Compared to the approximately 30-40% radiation efficiency associated with a conventional antenna with S11 < -6dB, or VSWR < 3, the 5G broadband antenna of this embodiment achieves a radiation efficiency of approximately 60-70%.

[0079] Each resonance point of the 5G broadband antenna of this embodiment is described in detail below:

[0080] 1. Resonance point 705MHz:

[0081] The resonance of 705MHz is mainly completed by the local oscillator of the second branch slot 320 on the right side of the second resonant arm 300. The RF signal is transmitted by the feed source 400 to the second resonant arm 300 and flows along the periphery of the copper-clad trace, passing through the rectangular cut corner 310 on the right, the second cut corner 330 on the right, and finally flowing through the third vertical slot 323 and the second horizontal slot 322 on the second branch slot 320 on the right. This current path achieves resonance near this frequency point. Among them, the second cut corner 330 on the right is used to adjust the total path length of the 705MHz resonant current flowing along the right periphery of the copper-clad trace, thereby fine-tuning the resonant frequency (the second cut corner 330 on the left is similarly used in the following text to adjust the total path length of the resonant current flowing along the left periphery of the copper-clad trace, and will not be repeated). The rectangular cut corners 310 provide a high-frequency resonance path to be described later, and on the other hand, change the length of the feeding surface to adjust the input impedance of the second resonant arm 300, that is, to control the input impedance of the feeding current and thus improve the overall S11 parameter (not described again later). Figure 5 and Figure 6 As shown, Figure 5 This is the 705MHz far-field 3D radiation pattern. Figure 6 This is the 705MHz far-field EH surface lobe diagram. Figure 5 and Figure 6 It can be seen that around 705 MHz, the antenna radiation of this embodiment exhibits omnidirectional characteristics.

[0082] 2. Resonance point 780MHz:

[0083] The resonance of 780MHz is mainly completed by the two first branch slots 220 of the first resonant arm 200 and the local oscillator of the second branch slot 320 on the left side of the second resonant arm 300. The RF signal is transmitted to the first resonant arm 200 and the second resonant arm 300 by the feed source 400. On the first resonant arm 200, it flows through the first vertical slot 221 and the first horizontal slot 222 of the first branch slot 220. On the second resonant arm 300, it flows along the periphery of the copper-clad trace, passes through the rectangular cut corner 310 on the left, the second cut corner 330 on the left, and finally flows through the third vertical slot 323 and the second horizontal slot 322 of the second branch slot 320 on the left. The above-mentioned current paths jointly realize the resonance near 780MHz. As Figure 7 and Figure 8 As shown, Figure 7 This is the 780MHz far-field 3D radiation pattern. Figure 8 This is the 780MHz far-field EH surface lobe diagram. Figure 7 and Figure 8 It can be seen that around 780 MHz, the antenna of this embodiment radiates omnidirectionally.

[0084] 3. Resonance point 900MHz:

[0085] The 900MHz resonance is mainly achieved by the local oscillator of the second branch slot 320 on the left side of the second resonant arm 300. The RF signal is transmitted to the second resonant arm 300 by the feed source 400, flows along the inner copper trace of the second resonant arm 300, and flows through the second vertical slot 321, the second horizontal slot 322, and the third vertical slot 323 of the second branch slot 320 on the left side. As described above, the current path achieves resonance near 900MHz. Figure 9 and Figure 10 As shown, Figure 9 is the 900MHz far-field 3D radiation pattern, Figure 10 This is the 900MHz far-field EH surface lobe diagram. Figure 9 and Figure 10 It can be seen that around 900MHz, its radiation is omnidirectional.

[0086] 4. Resonance point 1.335GHz:

[0087] The 1.335 GHz resonance is mainly achieved by the two first branch slots 220 on the first resonant arm 200, which double the original oscillation frequency of 780 MHz. The original current path not only realizes the 780 MHz local oscillation but also produces a 1.335 GHz doubled frequency. Figure 11 and Figure 12 As shown, Figure 11 This is the 1.335GHz far-field 3D radiation pattern. Figure 12 This is the 1.335GHz far-field EH surface lobe diagram. Figure 11 and Figure 12 It can be seen that near 1.335 GHz, its radiation is omnidirectional.

[0088] 5. Resonance point 1.630GHz:

[0089] The resonance of 1.630 GHz is mainly achieved by the frequency multiplication of the original oscillation frequency of 705 MHz in the second branch slot 320 on the right side of the second resonant arm 300. The original current path not only realizes the 705 MHz local oscillation but also produces the frequency multiplication of 1.630 GHz. Figure 13 and Figure 14 As shown, Figure 13 This is the 1.630GHz far-field 3D radiation pattern. Figure 14 This is the 1.630GHz far-field EH surface lobe diagram. Figure 13 and Figure 14 It can be seen that near 1.630 GHz, its radiation is basically omnidirectional.

[0090] 6. Resonance point 1.915GHz:

[0091] The 1.915 GHz resonance is mainly achieved by the local oscillation of the copper-clad structure between the angled slot 211 and the first vertical slot 221 of the first resonant arm 200. The RF signal is transmitted from the feed source 400 to the first resonant arm 200, and flows through the copper-clad structure between the angled slot 211 and the first vertical slot 221 to generate resonance. As described above, the current path achieves resonance near 1.915 GHz. Figure 15 and Figure 16 As shown, Figure 15 This is the 1.915GHz far-field 3D radiation pattern. Figure 16 This is the 1.915GHz far-field EH surface lobe diagram. Figure 15 and Figure 16 It can be seen that near 1.915 GHz, its radiation is omnidirectional.

[0092] 7. Resonance point 3.170GHz:

[0093] The resonance at 3.170 GHz is mainly achieved by the first cut corner 210 and the cut corner gap 211 of the first resonant arm 200, and the local oscillator of the rectangular cut corner 310 of the second resonant arm 300. The RF signal is transmitted from the feed source 400 to the first resonant arm 200 and the second resonant arm 300, and flows along the periphery of the copper-clad trace on the first resonant arm 200, passing through the first cut corner 210 and the cut corner gap 211. On the second resonant arm 300, it flows along the periphery of the copper-clad trace, passing through the edge of the rectangular cut corner 310. The above-mentioned current paths jointly achieve resonance near 3.170 GHz. Figure 17 and Figure 18 As shown, Figure 17 This is the 3.170GHz far-field 3D radiation pattern. Figure 18 This is the 3.170GHz far-field EH surface lobe diagram. Figure 17 and Figure 18 It can be seen that around 3.170 GHz, its radiation is omnidirectional.

[0094] 8. Resonance point 4.615GHz:

[0095] The resonance at 4.615 GHz is mainly achieved by the local oscillator of the cut-angle slot 211 of the first resonant arm 200. The RF signal is transmitted from the feed source 400 to the first resonant arm 200, flows along the outer periphery of the copper-clad trace on the first resonant arm 200, and passes through the cut-angle slot 211. The above-mentioned current path realizes the resonance near 4.615 GHz. Figure 19 and Figure 20 As shown, Figure 19 This is the 4.615GHz far-field 3D radiation pattern. Figure 20 This is the 4.615GHz far-field EH surface lobe diagram. Figure 19 and Figure 20It can be seen that around 4.615 GHz, its radiation is omnidirectional.

[0096] One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0097] In this embodiment, two copper-clad trace areas are formed on the top surface of a PCB, enabling the provision of two resonant arms on the top surface of the PCB. These resonant arms are respectively a first resonant arm and a second resonant arm. The first resonant arm and the second resonant arm are arranged one above the other in an axisymmetric structure, with the first resonant arm positioned above the second resonant arm. Both the first and second resonant arms are bendable. Each of the first and second resonant arms includes multiple cut corners and multiple slots. Because each resonant arm has multiple slots and cut corners, and each resonant arm is bendable, high-frequency current flowing through these slots, cut corners, and the peripheral path of the resonant wall itself resonates at different frequencies, thereby meeting the frequency band requirements of 5G communication antennas, covering the 5G NR FR1 band and being backward compatible with the 2G / 3G / 4G bands, achieving a high-bandwidth design. Furthermore, the antenna structure of this embodiment is simple and low-cost, avoiding complex branching to achieve a broadband design. The antenna of this embodiment is essentially axisymmetric in its physical structure, thereby optimizing the direction of the resonant current and achieving a uniform radiation pattern. In this way, the antenna structure of this embodiment can greatly improve the broadband efficiency.

[0098] It should be understood by those skilled in the art that although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0099] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A 5G broadband antenna, characterized in that: include: A PCB substrate, a first resonant arm and a second resonant arm provided on an upper surface of the PCB substrate, wherein the first resonant arm and the second resonant arm are both copper-clad routing areas; The first resonant arm and the second resonant arm are arranged in an upper and lower arrangement and have an axisymmetric structure, wherein the first resonant arm is located above the second resonant arm, and both the first resonant arm and the second resonant arm are bendable resonant arms; The first resonant arm and the second resonant arm each include a plurality of cut corners and a plurality of slots.

2. The 5G broadband antenna according to claim 1, wherein: The first resonant arm comprises: a bridge gap, two first cut corners and two first branch gaps; The two first branch gaps are located above the two first cut corners and the bridge gap; A first branch gap is correspondingly provided above each first cut corner; The bridge gap is located between the two first cut corners and connects the two first cut corners.

3. The 5G broadband antenna according to claim 2, wherein: The two first cutting corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner.

4. The 5G broadband antenna according to claim 2, wherein: The two first branch gaps are respectively located on the left and right sides of the upper surface and are arranged axially symmetrically; each first branch gap has an L-shaped structure; Each of the first branch gaps includes: a first vertical gap and a first horizontal gap; A first end of the first horizontal slit faces a side edge of the PCB substrate, and a second end of the first horizontal slit is connected to one end of the first vertical slit; The other end of the first vertical slit faces the first cutting angle; Wherein, the second ends of the first horizontal slots of the two first branch slots are adjacently arranged.

5. The 5G broadband antenna according to claim 2, wherein: The first resonant arm further includes: a corner slot provided on each of the first corners, wherein the corner slots are arranged axially symmetrically, one end of the corner slot is connected to the first corner, and the other end faces the first branch slot.

6. The 5G broadband antenna according to claim 1, wherein: The second resonant arm comprises: two rectangular cut corners, two second cut corners and two connected second branch gaps; The two rectangular cut corners are located above the two second branch gaps and below the first resonant arm, and the two rectangular cut corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner; Two second branch slits are located between two second cut corners, and each second branch slit is corresponding to one second cut corner; The two second cut corners are respectively located on the left and right sides of the upper surface and are arranged in an axisymmetric manner.

7. The 5G broadband antenna according to claim 6, wherein: The two second branch gaps are respectively located on the left and right sides of the upper surface and are arranged axially symmetrically; each second branch gap has a J-shaped structure; Each of the second branch gaps includes: a second vertical gap, a second horizontal gap, and a third vertical gap; A first end of the second horizontal slit is connected to a first end of the second vertical slit, and a second end of the second horizontal slit is connected to one end of the third vertical slit; The other end of the third vertical slit faces the corresponding second cutting angle; The second ends of the second vertical slots of the two second branch slots are connected to each other, and the second vertical slots of the two second branch slots are adjacent to each other; The lengths of the third vertical gaps of each of the second branch gaps are inconsistent.

8. The 5G broadband antenna according to claim 2, wherein: Also includes: A feed source is located in the bridge gap.

9. The 5G broadband antenna according to claim 1, wherein: The PCB substrate is a single-layer PCB substrate.

10. The 5G broadband antenna according to claim 1, wherein: The material of the PCB substrate is FR4 material.

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