Ultra-wideband high-performance array antenna

Abstract

The utility model provides an ultra-wide-band high-performance array antenna, which comprises a plurality of ultra-wide-band oscillator units arranged on a reflecting substrate in an array form, the ultra-wideband oscillator unit comprises a plurality of radiation parts arranged on the dielectric plate at intervals, and the radiation arm of any radiation part and the radiation arm of the adjacent radiation part are collinear to form a dipole; in one radiation piece, any two adjacent radiation arms are perpendicular to each other to form a dual-polarized oscillator; the ultra-wideband oscillator unit further comprises a parasitic branch knot. The parasitic branches are arranged between every two radiation pieces, and the parasitic branches are arranged on the dielectric plate in the horizontal direction and the vertical direction; the radiation part and the parasitic branch knot are coupled and connected to form a frequency expanding structure. According to the utility model, the S parameter of the oscillator unit is optimized by arranging the coupling frequency-broadening structure and the parasitic branch knot, electromagnetic waves are guided through the cooperation of the reflecting strip, the isolating strip and the director, the interference of high frequency to low frequency is reduced, the standing-wave ratio of the antenna is further reduced, and the directivity of the antenna is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to antenna technical field especially relates to a kind of ultra-wideband high-performance array antenna. BACKGROUND

[0002] With the continuous development of mobile communication technology, users have higher and higher requirements for data transmission speed and communication quality. In order to meet the growing demand for communication, the performance of the base station needs to be continuously improved. Ultra-wideband antennas can work in a wider frequency range, adapt to different communication standards and frequency bands, and provide support for multiple communication services. Modern communication systems often need to support multiple frequency bands at the same time, such as different mobile communication frequency bands such as 2G, 3G, 4G, and 5G, as well as wireless communication frequency bands such as Wi-Fi and Bluetooth. Wideband base station antennas can reduce the number of base station antennas and installation space, reduce construction cost and maintenance difficulty. And with the rapid growth of wireless communication services, spectrum resources are becoming increasingly scarce. Ultra-wideband antennas can more effectively utilize limited spectrum resources, improve spectrum utilization, and meet the growing demand for communication.

[0003] Patent No. CN110635219A discloses a 5G ultra-wideband dual-polarization coupling radiation unit and antenna. The unit cooperates the three of the decoupling component added between the dipole arms, the diversity aggregation sheet of polarization zero, and the parasitic unit at the end of the dipole arm to make the frequency bandwidth reach 1710-3800MHz. However, in actual arraying, it is found that although the above indicators have been optimized, they do not meet the requirements when multiple units are arrayed. UTILITY MODEL CONTENT

[0004] To solve the problems in the background art, the utility model provides an ultra-wideband high-performance array antenna.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] An ultra-wideband high-performance array antenna includes a plurality of ultra-wideband dipole units installed in an array form on a reflecting substrate.

[0007] The ultra-wideband dipole unit includes a plurality of radiating elements arranged at intervals on a dielectric plate, and the radiation arm of any radiating element is collinear with the radiation arm of the adjacent radiating element to form a dipole.

[0008] In a radiating element, any two adjacent radiation arms are perpendicular to each other to form a dual-polarized dipole.

[0009] The ultra-wideband dipole unit further includes a parasitic stub.

[0010] The parasitic stub is arranged between every two radiating elements and is arranged on the dielectric plate along the horizontal and vertical directions.

[0011] The radiating elements are coupled to the parasitic branches to form a frequency multiplication structure.

[0012] Preferably, each of the ultra-wideband dipole units is provided with a feeding structure, the plurality of feeding structures are connected to the microstrip lines of the corresponding sub-power dividers through a coaxial cable respectively, and the plurality of sub-power dividers are connected to the main power divider through another coaxial cable after being combined to form a feeding network.

[0013] Preferably, a plurality of groups of reflective strips are arranged on the reflective substrate, and the plurality of groups of reflective strips are arranged vertically and horizontally on the reflective substrate.

[0014] Preferably, the reflective strips are provided with insulating members at the bottom, and the reflective strips are L-shaped to make the reflective surfaces face the ultra-wideband dipole units.

[0015] The reflective strips are provided with avoiding grooves.

[0016] Preferably, the ultra-wideband dipole units are provided with at least one director.

[0017] The medium plate and the director are provided with mounting holes corresponding to each other, and the end of the spacing column is matched with the mounting holes to make the director oppositely arranged with the medium plate.

[0018] Preferably, the medium plate is an FR4 medium plate, and the medium constant is 4.4.

[0019] Preferably, the sub-power dividers and the main power divider are installed at intervals from the reflective substrate through the spacing columns.

[0020] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0021] The technical solution optimizes the S parameter of the dipole unit by arranging the coupling frequency multiplication structure, guides the electromagnetic wave through the cooperation of the reflective strips and the director, reduces the interference of high frequency on low frequency, and further reduces the standing wave ratio of the antenna and further improves the directivity of the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the front structure schematic view of the array antenna in the utility model;

[0023] Figure 2 is the side structure schematic view of the array antenna in the utility model;

[0024] Figure 3 is the schematic view of one ultra-wideband dipole unit in the utility model;

[0025] Figure 4 is the schematic view of the feeding network in the utility model;

[0026] Figure 5 is the array antenna standing wave ratio test figure of the utility model;

[0027] Figure 6 is the array antenna gain test data figure of the utility model;

[0028] Figure 7 is the reflection strip avoidance groove structure schematic diagram of the utility model.

[0029] Reflection substrate 1, ultra-wideband oscillator unit 2, dielectric plate 21, radiation arm 22, parasitic branch 23, director 3, spacer column 4, feed structure 5, coaxial cable 6, sub power divider 7, main power divider 8, reflection strip 9, avoidance groove 91. DETAILED DESCRIPTION

[0030] The technical solutions of the utility model will be further described below in combination with the drawings and through specific embodiments.

[0031] In order to make the personnel in the technical field better understand the utility model scheme, the technical solutions in the utility model embodiments will be clearly and completely described below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the scope of protection of the utility model.

[0032] The terms "first", "second", etc. in the specification and claims of the utility model and the above drawings are used to distinguish different objects, not to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, the process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but optionally also includes the steps or units not listed, or optionally also includes other steps or units inherent to these processes, methods, products or ends.

[0033] In this paper, the "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the utility model. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. The person skilled in the art explicitly and implicitly understands that the embodiments described in this paper can be combined with other embodiments.

[0034] An ultra-wideband high-performance array antenna, such as Figure 1 and Figure 3As shown, the super wideband antenna unit 2 is mounted on the reflecting substrate 1 in an array form;

[0035] The super wideband antenna unit 2 comprises a plurality of radiating elements arranged at intervals on the dielectric plate 21, and the radiation arm 22 of any radiating element is collinear with the radiation arm 22 of the adjacent radiating element to form a dipole;

[0036] In one radiating element, any two adjacent radiation arms 22 are perpendicular to each other to form a dual-polarized antenna element;

[0037] The super wideband antenna unit 2 further comprises a parasitic branch 23;

[0038] The parasitic branch 23 is arranged between two radiating elements, and the parasitic branch 23 is arranged on the dielectric plate 21 in the horizontal direction and the vertical direction;

[0039] The radiating element and the parasitic branch 23 are coupled to form a frequency expansion structure.

[0040] In this embodiment, the super wideband antenna unit is a PCB antenna, the working frequency band is 1710-3800 MHz, the surface of the super wideband antenna unit is treated with green oil, and compared with the traditional die-casting antenna, the super wideband antenna unit has the advantages of small size, light weight, easy flexible installation, low cost and the like.

[0041] Further, the super wideband antenna unit has excellent standing wave performance and isolation and other electrical indicators at 1700-2700 MHz / 3300-3600 MHz.

[0042] In order to achieve the effect of frequency expansion, the application designs a middle-coupling frequency expansion structure, the parasitic branch 23 and the radiation arm 22 are coupled, so that the working frequency of the antenna can be further expanded to the target working frequency, and the low-frequency working frequency is also expanded by the coupling feeding mode.

[0043] Further, the application can effectively improve the impedance matching of the antenna unit, and further improve the isolation between the polarizations of the single antenna unit, four parasitic branches 23 are designed, in addition to the frequency expansion of the radiation arm 22, the parasitic branches 23 can also improve the impedance matching. In one antenna unit, the four parasitic branches 23 are arranged between two radiating elements, and the arrangement direction is along the horizontal direction and the vertical direction of the dielectric plate 21, so that the impedance of the super wideband antenna unit is positively matched, the isolation between the polarizations is further improved, the directivity pattern of the antenna unit is more convergent, and good conditions are provided for the excellent performance of the antenna array.

[0044] In the embodiment, the antenna adopts a 4*4 unit array. It should be noted that the number of the dipole units is not limited, and a reasonable combination of the dipole units and a reasonable feed network can be set according to actual needs.

[0045] Preferably, as shown in Figure 4 each of the ultra-wideband dipole units 2 is provided with a feed structure 5, a plurality of the feed structures 5 are respectively connected to the microstrip lines of the corresponding sub-power dividers 7 through a coaxial cable 6, a plurality of the sub-power dividers 7 are combined and connected to the main power divider 8 through another coaxial cable 6, so as to form a feed network.

[0046] Preferably, the sub-power dividers 7 and the main power divider 8 are installed at a distance from the reflection substrate 1 through the spacer columns 4.

[0047] In the embodiment, a plurality of coaxial cables 6 of specific lengths are welded to the feed structures 5 of a plurality of the ultra-wideband dipole units 2 through the through holes formed in the reflection substrate 1, and one end of each of the coaxial cables 6 not connected to the feed structure 5 is connected to the microstrip line of the corresponding sub-power divider 7, and the connection mode is welding. The sub-power dividers 7 in the embodiment are provided with four sub-power dividers 7, and a plurality of the sub-power dividers 7 are combined and welded to the main power divider 8 through a coaxial cable 6, so as to form the feed network of the antenna. It should be noted that the feed network will change according to the array, and the forming mode described in the embodiment is not unique and fixed, and can be further optimized and changed according to the specific array design, including but not limited to changing the design of the power divider microstrip line and the length of the coaxial cable 6.

[0048] Preferably, as shown in Figures 1 to 3 , Figure 7 a plurality of groups of reflection strips 9 are arranged on the reflection substrate 1, and the plurality of groups of the reflection strips 9 are arranged vertically and horizontally on the reflection substrate 1.

[0049] Preferably, the reflection strip 9 is provided with an insulating part at the bottom, and the reflection strip 9 is bent in an L shape so that the reflection surface faces the ultra-wideband dipole unit 2.

[0050] The reflection strip 9 is provided with an avoiding groove 91.

[0051] In the embodiment, the reflection strip 9 is provided with a plurality of groups, which are made of metal materials, including three vertical groups and one horizontal group, and are arranged at the spacing positions between the ultra-wideband antenna dipole units. By arranging the reflection strip 9, the interference between the radiation arrays can be reduced, and the boundary effect and coupling effect between the systems can be reduced.

[0052] It should be noted that when the number of dipole units and the spacing between dipole units changes, the arrangement mode of the reflection strip 9 is not the only mode, and can be reasonably designed and installed according to actual needs and experiments.

[0053] Further, the bottom of the reflecting strip 9 is provided with insulating material, and the reflecting strip 9 is provided with an avoiding groove 91, so that the unstable contact between the reflecting strip 9 and the reflecting substrate 1 is prevented, and the intermodulation performance of the antenna is improved.

[0054] Preferably, the ultra-wideband dipole unit 2 is provided with at least one director 3.

[0055] The medium plate 21 and the director 3 are both provided with mounting holes corresponding to each other, and the end of the spacer column 4 is matched with the mounting hole to allow the director 3 to be arranged opposite to the medium plate 21.

[0056] In the embodiment, the director 3 is made of metal, and the director 3 and the medium plate 21 are stably fixed by the four spacer columns 4 with specific heights. It should be noted that the mounting mode and the number of the director 3 are not unique, and can be reasonably set according to actual requirements and cost considerations.

[0057] Preferably, the medium plate 21 is an FR4 medium plate 21, and the medium constant is 4.4.

[0058] In the technical solution, due to the wide working frequency, the reasonable unit spacing cannot be set when the ultra-wideband dipole unit 2 is arrayed, which leads to the deterioration of the standing wave ratio, the isolation degree and the directional diagram of the antenna. The metal reflecting strip 9 and the director 3 with specific sizes are adopted for cooperation and debugging, so that the VWSR is less than or equal to 1.5, and the isolation degree and the directivity are good.

[0059] The cooperation of the director 3, the feeding network and the metal reflecting strip 9 makes the VWSR less than or equal to 1.5 at 1700-2700MHz / 3300-3600MHz and achieves a higher gain. The cooperation of the parasitic branch 23 and the radiation arm 22 realizes frequency expansion. Compared with other multi-band antennas, the antenna has a small size, more units in the same size, higher gain in the whole frequency band, wider frequency band to meet various mobile communication systems, effectively reduced cost and higher gain to effectively improve communication quality. After testing, the VWSR is less than or equal to 1.5 at 1710-2700Mhz and 3300-3600Mhz, which realizes the coverage of ultra-wide frequency and meets the use requirements. Figure 5 It can be seen from the gain test data that the gain at 1710-2700Mhz and 3300-3600Mhz is greater than 17db, and the antenna can provide better communication ability. Figure 6

[0060] ​The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted as limiting the protection scope of the present application in any way. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative efforts, and these embodiments will all fall within the protection scope of the present application.

Claims

1. An ultra-wideband high performance array antenna, characterized by: The array antenna comprises a plurality of ultra-wideband vibrator units arranged in an array on a reflecting substrate; The ultra-wideband vibrator unit comprises a plurality of radiating elements arranged on a dielectric plate, and the radiating arms of any two adjacent radiating elements are collinear to form a dipole; In a radiating element, any two adjacent radiating arms are perpendicular to each other to form a dual-polarized vibrator; The ultra-wideband vibrator unit further comprises a parasitic branch; The parasitic branch is arranged between any two radiating elements and is arranged on the dielectric plate in horizontal and vertical directions; The radiating elements and the parasitic branch are coupled to form a frequency multiplication structure.

2. The ultra-wideband high-performance array antenna according to claim 1, wherein: Each of the ultra-wideband vibrator units is provided with a feeding structure, a plurality of the feeding structures are connected to microstrip lines of corresponding sub-power dividers through coaxial cables, and the sub-power dividers are connected to a main power divider through another coaxial cable after being combined to form a feeding network.

3. The ultra-wideband high-performance array antenna according to claim 1, wherein: The reflecting substrate is provided with a plurality of groups of reflecting strips, and the groups of reflecting strips are arranged vertically and horizontally on the reflecting substrate.

4. The ultra-wideband high-performance array antenna according to claim 3, wherein: The bottom of the reflecting strip is provided with an insulating member, and the reflecting strip is bent in an L shape to make the reflecting surface face the ultra-wideband vibrator unit; The reflecting strip is provided with a clearance.

5. The ultra-wideband high-performance array antenna according to claim 2, wherein: The ultra-wideband vibrator unit is provided with at least one director; The dielectric plate and the director are provided with corresponding mounting holes, and the end of the spacer column is matched with the mounting holes to make the director oppositely arranged with the dielectric plate.

6. The ultra-wideband high-performance array antenna according to claim 1, wherein: The dielectric plate is an FR4 dielectric plate, and the dielectric constant is 4.

4.

7. The ultra-wideband high-performance array antenna according to claim 5, wherein: The sub-power dividers and the main power divider are installed at a distance from the reflecting substrate through the spacer column.

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