A nested and interwoven antenna for coexistence of 4G and 5G networks

Abstract

A nested and interwoven antenna for coexistence of 4G and 5G networks, comprising at least two high-frequency radiation arrays formed by arranging high-frequency radiation units in rows, at least one low-frequency radiation array formed by arranging low-frequency radiation units in rows, and a MIMO array, wherein the at least two high-frequency radiation arrays are arranged side by side, at least one low-frequency radiation array is nested between the at least two high-frequency radiation arrays, and at least one low-frequency radiation array and the upper or lower part of the at least two high-frequency radiation arrays are nested within the MIMO array. Through a special array layout and the use of filtering oscillators, 4G and 5G are integrated into an antenna with a relatively small size. The reasonable placement of the element spacing enables the performance of both the 4G and 5G network systems to reach the level of a single 4G antenna and 5G antenna.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and specifically to a nested and intertwined antenna for coexistence of 4G and 5G networks. Background Art

[0002] In the communication industry, the coexistence of 4G and 5G networks will surely last for a long time. Although FDD and MIMO antennas are already very mature at present and can provide good communication effects for customers, due to the integration of 4G and 5G communication systems, antennas are also required to be compatible with both FDD and MIMO dual systems. The original integration of 4G and 5G communication systems is compatible with FDD and TDD, and the overall system capacity is relatively low. Therefore, the combination of passive antennas and active antennas has become an important link in the development of the communication industry. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a nested and intertwined antenna for coexistence of 4G and 5G networks, enabling the coexistence of 4G and 5G dual networks, supporting systems of different formats such as FDD and MIMO, and providing a fusion network deployment solution for customers.

[0004] To achieve the above technical purpose, the technical solution adopted is: a nested and intertwined antenna for coexistence of 4G and 5G networks, including at least two high-frequency radiation arrays composed of high-frequency radiation units arranged in rows on a reflector, at least one low-frequency radiation array composed of low-frequency radiation units arranged in rows, and a MIMO array. The at least two high-frequency radiation arrays are arranged side by side, and at least one low-frequency radiation array is nested between the at least two high-frequency radiation arrays. At least one low-frequency radiation array and the upper or lower part of the at least two high-frequency radiation arrays are nested within the MIMO array.

[0005] The low-frequency radiation units located inside the MIMO array and the low-frequency radiation units located outside the MIMO array are arranged in a staggered manner.

[0006] The low-frequency radiation units located inside the MIMO array and the low-frequency radiation units located outside the MIMO array are arranged in a staggered manner.

[0007] Each low-frequency radiation unit is nested in the middle of four high-frequency radiation units, and the four high-frequency radiation units are located at the extension positions of the four radiation arms of the low-frequency radiation unit.

[0008] An isolation belt is provided between two columns of high-frequency radiation arrays and / or the MIMO array.

[0009] The MIMO array is composed of a double-layer microstrip patch oscillator arrangement.

[0010] The low-frequency radiation unit and / or high-frequency radiation unit includes a cross radiation surface and a feeding unit. The radiation surface is a four-arm structure with double-sided copper cladding. The upper copper cladding and the lower copper cladding are respectively covered on the upper and lower surfaces of each arm of the radiation surface. The rear end of the upper copper cladding on the same arm is coupled to the front end of the lower copper cladding through a medium. The upper copper claddings on two arms in the same direction are connected together, and the upper copper claddings after connection in different directions do not contact each other, forming a radiation oscillator arm with an orthogonal structure. The feeding unit performs DC feeding on the radiation oscillator arm.

[0011] The shape of the upper copper cladding and / or the lower copper cladding is thick at both ends and thin in the middle.

[0012] The middle part of the upper copper cladding and / or the lower copper cladding is in a gradually changing form from thick to thin and then to thick.

[0013] The feeding unit consists of a coaxial cable, a metal support rod, and a grounding plate. One end of the coaxial cable is connected to the upper copper cladding after connection in one direction for DC feeding, and the other end of the coaxial cable is used to connect to a power divider network. One end of the metal support rod is connected to the upper copper cladding after connection in another direction, and the other end of the metal support rod is connected to the grounding plate installed on the reflector.

[0014] The beneficial effects of the present invention are:

[0015] For the nested and interwoven antenna for coexistence of 4G and 5G networks described in the present invention, through a special array layout and the use of filtering oscillators, 4G and 5G are integrated into an antenna with a relatively small size. The reasonable placement of the element spacing enables the performance of both the 4G and 5G network systems to reach the level of a single 4G antenna and 5G antenna.

[0016] The nested and interwoven method of the present invention, and the use of a low-frequency radiation unit with a filtering structure, can solve the mutual coupling problem and size problem of more antennas for 4G and 5G dual systems, thereby realizing more embodiments of the antennas of the present invention. Therefore, the corresponding designs and products should be included in the protection scope of this patent. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall layout of the present invention;

[0018] Figure 2 For the Figure 1 amplified schematic diagram of part A of the present invention;

[0019] Figure 3 For the Figure 1 amplified schematic diagram of part B of the present invention;

[0020] Figure 4 It is a top perspective view of the low-frequency radiation unit and / or high-frequency radiation unit of the present invention;

[0021] Figure 5 Perspective view of the upper and lower copper-clad layers of one arm of the low-frequency radiation unit and / or high-frequency radiation unit of the present invention;

[0022] Figure 6 Front view of the low-frequency radiation unit and / or high-frequency radiation unit of the present invention. Detailed implementation manners

[0023] As Figure 1 shown, a nested and interwoven antenna for coexistence of 4G and 5G networks includes at least two high-frequency radiation arrays formed by arranging high-frequency radiation units in rows on a reflector, at least one low-frequency radiation array formed by arranging low-frequency radiation units in rows, and a MIMO array. The high-frequency radiation arrays can be two-column, four-column, six-column, etc., the low-frequency radiation arrays can be one-column, two-column, three-column, etc., and the MIMO array can be arranged in n X m, where n≥2 and m≥2. At least two high-frequency radiation arrays are arranged side by side, and at least one low-frequency radiation array is nested between at least two high-frequency radiation arrays. At least one low-frequency radiation array and at least two high-frequency radiation arrays are nested inside the MIMO array at the upper or lower part. According to different required frequency bands, different arrays are selected for combination according to the required number of columns and rows. This combination forms an active antenna with a large capacity.

[0024] The low-frequency radiation units inside the MIMO array and the low-frequency radiation units outside the MIMO array are arranged in a staggered manner, which can optimize the 4G network shaping while reducing the mutual coupling between the 4G network and the 5G network.

[0025] The low-frequency radiation units inside the MIMO array and the low-frequency radiation units outside the MIMO array are arranged in a staggered manner, which can optimize the 4G network shaping while reducing the mutual coupling between the 4G network and the 5G network.

[0026] Each low-frequency radiation unit is nested in the middle of four high-frequency radiation units. The four high-frequency radiation units are located at the extended positions of the four radiation arms of the low-frequency radiation unit, which can spread the spectrum and increase the gain of the low-frequency unit. At the same time, after combining two high-frequency units, the loading effect is balanced, thus achieving the effect of spreading the spectrum and increasing the gain.

[0027] An isolation band is provided between two columns of high-frequency radiation arrays and / or the MIMO array.

[0028] The MIMO array is composed of a double-layer microstrip patch oscillator arranged. The double-layer microstrip patch oscillator is a low-profile oscillator, which can reduce the mutual coupling effect of the low-frequency radiation unit and the high-frequency radiation unit nested in the MIMO array on the MIMO array.

[0029] As Figure 4As shown, the low-frequency radiation unit and / or high-frequency radiation unit includes a cross radiation surface and a feeding unit. The radiation surface has a four-arm (1a, 1b, 1c, 1d) structure with double-sided copper cladding. The upper copper cladding and the lower copper cladding are respectively covered on the upper and lower surfaces of each arm of the radiation surface. All the upper copper claddings include upper copper cladding 2a, upper copper cladding 2b, upper copper cladding 2c, and upper copper cladding 2d. All the lower copper claddings include lower copper cladding 3a, lower copper cladding 3b, lower copper cladding 3c, and lower copper cladding 3d. The rear end of the upper copper cladding on the same arm is connected to the front end of the lower copper cladding through dielectric coupling. The rear end of upper copper cladding 2a is connected to the front end of lower copper cladding 3a through dielectric coupling, and so on. Upper copper cladding 2b is coupled with lower copper cladding 3b, upper copper cladding 2c is coupled with lower copper cladding 3c, and upper copper cladding 2d is coupled with lower copper cladding 3d. The upper copper claddings on two arms in the same direction are connected together. That is, upper copper cladding 2a and upper copper cladding 2c are connected together in the middle by a feeding piece, and upper copper cladding 2b and upper copper cladding 2d are connected together in the middle by a feeding piece. The connected upper copper claddings in different directions do not touch each other. The connection is used for the two feeding pieces to be arranged up and down at the central intersection without touching each other, forming a radiation oscillator arm with an orthogonal structure. The feeding unit performs DC feeding on the radiation oscillator arm, and finally forms a quasi-half-wave radiation unit with a dual-polarization orthogonal (±45°) structure.

[0030] As Figure 5 shown, the shape of the upper copper cladding and / or the lower copper cladding is thick at both ends and thin in the middle. For example, the middle part of the upper copper cladding and / or the lower copper cladding has a tapered form that changes from thick to thin and then to thick again. Upper copper cladding 2a, upper copper cladding 2b, upper copper cladding 2c, and upper copper cladding 2d are all composed of three parts integrated together, including filtering section 2aa, filtering section 2bb, and filtering section 2cc. Lower copper cladding 3a, lower copper cladding 3b, lower copper cladding 3c, and lower copper cladding 3d are all composed of three parts integrated together, including filtering section 3aa, filtering section 3bb, and filtering section 3cc. Among them, the size and length of filtering section 2aa, filtering section 2cc, filtering section 3aa, and filtering section 3cc are mainly determined according to the frequency used, and mainly play the role of impedance matching. Filtering section 2bb and filtering section 3bb are used as filtering transition sections and are respectively connected between filtering section 2aa, filtering section 2cc and filtering section 3aa, filtering section 3cc, and have a tapered form that changes from thick to thin and then to thick again. By adjusting the thickness of the middle filtering section, electromagnetic waves of different frequency bands can be filtered.

[0031] As Figure 6As shown, the feeding unit consists of a coaxial cable 4bb, a metal support rod 4aa, and a grounding plate 4c. One end of the coaxial cable 4bb is connected to the upper copper clad after connection in one direction for DC feeding. The other end of the coaxial cable 4bb can be connected to the power splitter network after passing through the grounding plate or bypassing the grounding plate 4c. One end of the metal support rod 4aa is connected to the upper copper clad after connection in another direction, and the other end of the metal support rod 4aa is connected to the grounding plate installed on the reflector.

[0032] The height of the metal support rod 4aa is about 0.25 times the wavelength of the radiation unit. By changing the width of the metal support rod 4aa, good impedance matching can be achieved. The grounding plate 4c is installed above the reflector, and the metal support rod 4aa plays a role in supporting and stabilizing the entire radiation unit. The structure design of the entire radiation unit is simple, with low cost and convenient installation.

[0033] The radiation unit is placed in the array, with very little occlusion with the adjacent array. Through the function of the filtering structure, the mutual coupling between different arrays can be well reduced, ensuring the stability of performance.

[0034] Embodiment 1

[0035] Taking a 4-column high-frequency radiation array, a 2-column low-frequency radiation array, and an 8X12 MIMO array as examples, a detailed description is given. The high-frequency radiation array, low-frequency radiation array, and MIMO array are all arranged on the reflector 10. There are isolation strips 21, 22, 23 between the 4-column high-frequency radiation arrays 41, 42, 43, 44. The MIMO array is arranged by 8X12 double-layer microstrip patch oscillators. Each column of the high-frequency radiation array has 11 high-frequency radiation units, and each column of the low-frequency radiation array has 7 low-frequency radiation units. The 4G network includes the 4-column high-frequency radiation arrays 41, 42, 43, 44 and the 2-column low-frequency radiation arrays 31, 32. The 5G network includes the 8X12 MIMO array 50. Three units of the high-frequency radiation array and the low-frequency radiation array are nested in the MIMO array.

[0036] In the 4G network, the spacing between adjacent high-frequency radiation units in the same column on the outside is 125 mm. That is, the spacing between high-frequency radiation units 401 and 402 is 125 mm, which is close to 0.76 times the wavelength of this frequency band. The column spacing is 110 mm. That is, the spacing between high-frequency radiation units 402 and 403 is 110 mm, which is close to 0.7 times the wavelength of this frequency band. The spacing between the middle two columns of high-frequency radiation units is 125 mm. That is, the spacing between high-frequency radiation units 403 and 405 is 125 mm, and the column spacing is 94 mm. That is, the spacing between high-frequency radiation units 403 and 404 is 94 mm. The spacing between adjacent low-frequency radiation units in the same column is 250 mm. That is, the spacings between low-frequency radiation units 301 and 302, 303 and 304 are both 250 mm, which is close to 0.7 times the wavelength of this frequency band. The column spacing is 204 mm. That is, the spacings between low-frequency radiation units 301 and 303, 302 and 304 are 204 mm, which is close to 0.56 times the wavelength of this frequency band. The low-frequency radiation array is interlaced and placed in the middle of the high-frequency radiation array. In the MIMO array, the row spacing is 58 mm. That is, the spacing between double-layer microstrip patch oscillators 502 and 503 is 58 mm, and the column spacing is 44 mm. That is, the spacing between double-layer microstrip patch oscillators 501 and 502 is 44 mm. Due to the reasonable coordination of the high- and low-frequency unit spacings and the array spacings, the overall antenna layout is neat and beautiful, while ensuring the ideal radiation performance of each array.

[0037] The low-frequency radiation unit 302 is nested in the middle of 4 high-frequency radiation units 401, 402, 403, and 405, forming an independent spatial loading structure. For the low-frequency radiation unit 302, the high-frequency radiation units 401, 402, 403, and 405 are located at the positions where the 4 oscillator arms of the low-frequency radiation unit 302 extend, and can realize the functions of spreading the frequency spectrum and increasing the gain for the low-frequency radiation unit 302. For the +45° polarization of the high-frequency radiation unit 402 and the -45° polarization of the high-frequency radiation unit 401, the low-frequency radiation unit 301 is loaded in their extension directions. After the combination of the high-frequency radiation units 401 and 402, the loading effect is balanced, thereby realizing the functions of spreading the frequency spectrum and increasing the gain for the high-frequency radiation units 401 and 402.

[0038] The 3 units of each array in which the 4G network is nested in the MIMO part are placed out of alignment. The high-frequency radiation unit 407 and the high-frequency radiation unit 407 are misaligned by 30 mm in the vertical plane, and the low-frequency radiation unit 305 and the low-frequency radiation unit 306 are also misaligned by 30 mm in the vertical plane. The purpose is to optimize the 4G network pattern shaping and make the horizontal plane beam more convergent. At the same time, considering that the coupling energy at the center position of the MIMO array is strong, moving the nested units of the 4G network outward can also reduce the interference between the 4G and 5G networks.

[0039] For the high-frequency and low-frequency radiation units of the 4G network, ±45° dual-polarized oscillators with filtering functions are selected. There are filtering branches with special structures on the four arms of the high-frequency and low-frequency radiation units, which can effectively reduce the influence of electromagnetic waves of other interleaved arrays. For the MIMO part, low-profile double-layer microstrip patch oscillators are selected, and the filtering oscillators nested on the MIMO can also reduce the influence on the MIMO array;

[0040] Finally, in the present invention, the 4G and 5G networks are nested and interleaved, and the overall internal size is controlled within 1700mmX470mm, which is about 40% smaller than that of a conventional antenna. Due to the use of filtering oscillators with special structures, the performance of the present invention can reach the level of a single 4G antenna and 5G antenna whether it is on the 4G network or the 5G network.

Claims

1. A nested interleaved antenna for 4G and 5G network coexistence, characterized by: The invention comprises at least two columns of high-frequency radiation arrays composed of high-frequency radiation units, at least one column of low-frequency radiation arrays composed of low-frequency radiation units, and a MIMO array, which are arranged on a reflective plate. The at least two columns of high-frequency radiation arrays are arranged in parallel, and at least one column of low-frequency radiation array is nested between the at least two columns of high-frequency radiation arrays. The upper or lower parts of the at least one column of low-frequency radiation array and the at least two columns of high-frequency radiation arrays are nested in the MIMO array. The low-frequency radiation array located within the MIMO array and the low-frequency radiation array located outside the MIMO array are staggered; The high-frequency radiation array located within the MIMO array and the high-frequency radiation array located outside the MIMO array are staggered.

2. The nested interleaved antenna for 4G and 5G network coexistence according to claim 1, wherein: Each low-frequency radiation unit is nested in the middle of four high-frequency radiation units, and the four high-frequency radiation units are located at the extended positions of the four radiation arms of the low-frequency radiation unit.

3. The nested interleaved antenna for 4G and 5G network coexistence according to claim 1, characterized in that: An isolation zone is provided between two columns of high-frequency radiation arrays and / or two columns of MIMO arrays.

4. The nested interleaved antenna for 4G and 5G network coexistence according to claim 1, wherein: The MIMO array consists of a double-layer microstrip patch array.

5. The nested interleaved antenna for 4G and 5G network coexistence according to claim 1, wherein: The low-frequency radiation unit and / or the high-frequency radiation unit includes a cross radiation surface and a feeding unit. The radiation surface is a four-arm structure with double-layer copper cladding. The upper and lower surfaces of each arm of the radiation surface are respectively covered with an upper layer of copper cladding and a lower layer of copper cladding. The rear end of the upper layer of copper cladding on the same arm is connected to the front end of the lower layer of copper cladding through dielectric coupling. The upper layers of copper cladding on the two arms located in the same direction are connected together. In different directions, the connected upper layers of copper cladding do not contact each other, forming a radiation dipole arm with an orthogonal structure. The feeding unit feeds the radiation dipole arm.

6. The nested interleaved antenna for 4G and 5G network coexistence according to claim 5, characterized in that: The shape of the upper copper layer and / or the lower copper layer is thick at both ends and thin in the middle.

7. The nested interleaved antenna for 4G and 5G network coexistence according to claim 6, characterized in that: The middle portion of the upper copper clad layer and / or the lower copper clad layer has a gradual shape from thick to thin and then to thick again.

8. The nested interleaved antenna for 4G and 5G network coexistence according to claim 5, characterized in that: The feeding unit consists of a coaxial cable, a metal support rod and a grounding plate. One end of the coaxial cable is connected to the upper copper layer connected in one direction for DC feeding. The other end of the coaxial cable is used to connect the power division network. One end of the metal support rod is connected to the upper copper layer connected in the other direction. The other end of the metal support rod is connected to the grounding plate installed on the reflector.

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