A planar area wood-type antenna array

Abstract

The application discloses a flat building block type antenna array, which comprises an antenna unit and a metal floor, and the building block type antenna unit is composed of an antenna substrate, a hard foam plate, a multifunctional metal disc and a slanted wedge connector, and is fastened to the metal floor by four medium screws. A group of 4*4 circular metal patches are distributed on the upper surface of the antenna substrate, and a group of 5*5 circular through holes penetrate through the whole substrate, and two pairs of rhombus-like metal patches are distributed on the lower surface of the substrate, thereby forming the radiation arms of a dual-polarized dipole antenna. The multifunctional metal disc comprises one metal disc and five metal cylinders. The slanted wedge connector is composed of a metal inner core, a Teflon cylinder and a metal shell. Since the building block type antenna unit adopts a flat and modular design, the low profile and lightweight design of the UHF frequency band phased array antenna are realized, and the flexible and expandable array scale can be realized by changing the size of the metal floor.

Description

Technical Field

[0001] This application relates to the field of ultra-wideband array antenna technology, and in particular to a flat-area wooden antenna array. Background Technology

[0002] The UHF band typically refers to radio waves with wavelengths ranging from 0.3 GHz to 3 GHz, corresponding to wavelengths of 1 m to 0.1 m. It is commonly used in wireless communication, satellite communication, electronic warfare, and radar. As a crucial component for converting electromagnetic wave radiation into air, antennas are unavoidable in these systems. With the development of modern communication and microelectronics technologies, phased array antennas are increasingly adopted in communication, electronic warfare, and radar fields. To reduce the number of platform devices, phased array antennas are usually required to have ultra-wideband radiation capabilities. However, due to the short wavelength, existing UHF band phased array antennas typically have large element sizes, resulting in significant weight and inflexible array layout.

[0003] In summary, to address the challenges of existing UHF band phased array antennas being thick, heavy, and difficult to deploy flexibly, this invention proposes a flat, wood-like antenna array. The antenna elements in this array are modularly designed, appearing as cuboids of equal length and width. Furthermore, the array's operating bandwidth covers five harmonics, its profile height is less than 0.07 times the low-frequency wavelength, and the antenna elements are made of printed circuit board material, making them lightweight. Therefore, the array size can be flexibly expanded like building blocks. Summary of the Invention

[0004] This application provides a flat wooden antenna array that can solve the technical problems of traditional UHF band phased array antennas being large in size, heavy in weight, and difficult to flexibly assemble.

[0005] This application provides a flat-area wood-type antenna array, which includes:

[0006] A metal floor and multiple modular antenna units neatly arranged on top of the metal floor;

[0007] The modular antenna unit includes an antenna substrate, a rigid foam board, a multi-functional metal disk, and a wedge connector.

[0008] The antenna substrate is located above the rigid foam board, while the multi-functional metal disk and wedge connector are located inside the rigid foam board.

[0009] The modular antenna unit is fastened to the metal floor with four dielectric screws; the modular antenna unit is in the shape of a planar cuboid, with a length and width of 75mm.

[0010] Furthermore, the antenna substrate includes two microwave substrates, wherein the upper layer is a microwave substrate with a dielectric constant of 3.55, and a set of 4×4 circular metal patches are neatly distributed on its surface, while a set of 5×5 circular through holes runs through the entire substrate in a checkerboard pattern; a circular metal patch is distributed at the center of every four circular through holes.

[0011] The dielectric constant of the lower substrate is 2.2. Two pairs of rhomboid metal patches are symmetrically distributed on the four corners of the upper surface of the lower substrate, forming the radiating arms of the dual-polarized dipole antenna.

[0012] Furthermore, the rigid foam has a dielectric constant of 1.09 and is located below the antenna substrate. A circular through-hole is located in the center of the rigid foam, and a set of four semi-circular through-holes are located at the centers of the four sides of the rigid foam. The rigid foam is used for support.

[0013] Furthermore, the multi-functional metal disc is made of stainless steel and includes one metal disc and five metal cylinders;

[0014] The metal cylinders are fixed to the metal floor by threads at the bottom, and the metal discs are fastened to the five metal cylinders by a set of five metal screws.

[0015] The position and size of the metal disc match the circular through-hole in the center of the rigid foam.

[0016] Furthermore, the wedge connector includes a metal inner core, a Teflon cylinder, and a metal outer shell;

[0017] The outer shell of the metal casing is formed by splitting a cylinder diagonally along the bottom of the flange, while a cylindrical boss is provided on the top of the casing, which cooperates with the metal inner core to feed the antenna substrate.

[0018] The wedge connector is fastened to the metal floor with two metal screws, and its position corresponds to the position of the four semi-circular through holes of the rigid foam.

[0019] Furthermore, the overall height of the flat wooden antenna array is 51.6mm;

[0020] The size of the antenna array can be changed by altering the number of modular antenna elements.

[0021] Compared with the prior art, the present invention has the following significant advantages: (1) The antenna unit of the present invention adopts a planar and modular design. For phased array antennas, the array size can be flexibly expanded like building blocks by changing the size of the metal ground plane; (2) The antenna unit of the present invention adopts a wedge connector. The connector forms a quasi-balanced feeding structure through the wedge and boss structure, which is conducive to realizing ultra-wideband feeding of the antenna array; (3) The antenna substrate of the present invention integrates the antenna unit with the metal metasurface design. At the same time, the circular through holes on it are conducive to reducing the weight of the antenna array. Attached Figure Description

[0022] Figure 1 This is a 3D schematic diagram of a planar wood-type antenna array provided in an embodiment of this application;

[0023] Figure 2 This is a front view of an embodiment of this application;

[0024] Figure 3 This is an exploded view of the antenna element in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of a multifunctional metal disk according to an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of a wedge connector according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the antenna substrate according to an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of an active standing wave on plane E in an embodiment of this application;

[0029] Figure 8 This is a schematic diagram of an active standing wave in the H-plane of an embodiment of this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0031] This invention proposes a planar wooden antenna array. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the following is established: Figure 1 One embodiment is shown below, in conjunction with the appendix. Figures 1-8 The present invention will be described in further detail below.

[0032] like Figure 1 and Figure 2As shown, this application provides an 8×8 planar wood-type antenna array embodiment, mainly used in the UHF band, possessing a 5th harmonic ultra-wideband radiation capability, and the antenna profile height is only 0.07 times the low-frequency wavelength. The invention includes: a metal floor 100 and a plurality of modular antenna elements 101 neatly arranged on the metal floor 100; as shown... Figure 3 As shown, the modular antenna unit 101 is a planar cuboid with a length and width of 75mm. It includes an antenna substrate 102, a rigid foam board 103, a multifunctional metal disk 104, and a wedge connector 105. The antenna substrate (102) is located above the rigid foam board (103), and the multifunctional metal disk (104) and the wedge connector (105) are located inside the rigid foam board (103).

[0033] Furthermore, the modular antenna unit 101 is fastened to the metal ground plate 100 by means of four dielectric screws 106. The number of modular antenna units 101 can be determined as needed, so that the array size can be flexibly expanded like building blocks.

[0034] like Figure 6 As shown, the antenna substrate 102 includes two microwave substrates. The upper microwave substrate 114 has a dielectric constant of 3.55 and a set of 4×4 circular metal patches are neatly distributed on its surface. A set of 5×5 circular through holes runs through the entire substrate in a checkerboard pattern. A circular metal patch is distributed at the center of every four circular through holes. The lower substrate 115 is square with a dielectric constant of 2.2. Two pairs of rhomboid metal patches are symmetrically distributed at the four corners of the upper surface of the lower substrate 115, forming the radiating arms of the dual-polarized dipole antenna.

[0035] Among them, the rigid foam 103 is made of rigid foam material with a dielectric constant of 1.09. It is located below the antenna substrate 102. A circular through hole is located in the center of the rigid foam 103, and four semi-circular through holes are located at the center of the four sides of the rigid foam, which are used to provide support.

[0036] like Figure 4 As shown, the multifunctional metal disk 104 is made of stainless steel and includes one metal disk 107 and five metal cylinders 108. The metal cylinders 108 are threaded to the metal base plate 100, and the metal disk 107 is fastened to the five metal cylinders 108 by a set of five metal screws 109. The position and size of the metal disk 107 match the circular through-hole in the center of the rigid foam 103. The multifunctional metal disk has three functions: first, to increase the coupling effect between antenna elements, thereby expanding the bandwidth of the antenna elements; second, to improve the cross-polarization level of the antenna elements at high frequencies; and third, to structurally support the antenna substrate.

[0037] like Figure 5As shown, the wedge connector 105 includes a metal inner core 110, a Teflon cylinder 111, and a metal outer shell 112. The outer shell 112 is formed by splitting a cylinder diagonally along the bottom of a flange, and a cylindrical boss is provided on the top of the shell to cooperate with the metal inner core 110 to feed power to the antenna substrate 102. The wedge connector 105 is fastened to the metal base plate 100 by two metal screws 113, the positions of which correspond to the positions of the four semi-circular through holes on the rigid foam 103.

[0038] The present application provides a flat wooden antenna array that operates in the 0.4GHz to 2GHz frequency band and radiates with dual polarization. Figure 7 and Figure 8 The active standing waves in the H-plane and E-plane of the array element are given respectively. As can be seen from the figure, this embodiment has good impedance matching characteristics in the operating frequency band.

[0039] This invention realizes a planar modular antenna array, where the antenna elements are designed in a planar modular fashion, allowing the antenna array shape to be flexibly expanded like building blocks. Furthermore, due to the integrated design of the antenna elements and metal metasurface on the antenna substrate, and the strong coupling and structural support provided by the multifunctional metal disk, the overall thickness of the antenna array is only 0.07 times the low-frequency wavelength, achieving a low-profile and lightweight design for a UHF band phased array antenna.

[0040] The embodiments described above do not constitute a limitation on the scope of protection of this application.

Claims

1. A planar wooden antenna array, characterized in that, The flat-area wooden antenna array includes: Metal floor (100) and multiple modular antenna units (101) arranged neatly on the metal floor (100). The modular antenna unit (101) includes an antenna substrate (102), a rigid foam board (103), a multifunctional metal disk (104), and a wedge connector (105). The antenna substrate (102) is located above the rigid foam board (103), and the multifunctional metal disk (104) and the wedge connector (105) are located inside the rigid foam board (103); The modular antenna unit (101) is fastened to the metal floor (100) by means of four dielectric screws (106); wherein the modular antenna unit (101) presents an overall planar cuboid shape with a length and width of 75mm; The antenna substrate (102) includes two microwave substrates. The upper layer is a microwave substrate with a set of 4×4 circular metal patches neatly distributed on its surface. At the same time, a set of 5×5 circular through holes runs through the entire substrate in a checkerboard pattern. A circular metal patch is distributed at the center of every four circular through holes. Two pairs of rhomboid metal patches are symmetrically distributed on the four corners of the upper surface of the lower substrate (115), forming the radiating arms of the dual-polarized dipole antenna. A rigid foam board (103) is located below the antenna substrate (102). A circular through hole is located in the center of the rigid foam board (103), and a set of four semi-circular through holes are located at the center of the four sides of the rigid foam board. The rigid foam board (103) is used for support. The multi-functional metal disc (104) is made of stainless steel and includes one metal disc (107) and five metal cylinders (108). Among them, the metal cylinder (108) is fixed to the metal floor (100) by threads at the bottom, and the metal disc (107) is fastened to the five metal cylinders (108) by a set of five first metal screws (109); The position and size of the metal disc (107) match the circular through hole in the center of the rigid foam board (103); The wedge connector (105) includes a metal inner core (110), a Teflon cylinder (111), and a metal housing (112). The outer shell of the metal shell (112) is formed by splitting a cylinder along the bottom of the flange at an angle. At the same time, a cylindrical boss is provided on the top of the outer shell, so as to cooperate with the metal inner core (110) to feed the antenna substrate (102). The wedge connector (105) is fastened to the metal floor (100) by means of two second metal screws (113), and its position corresponds to the position of the semi-circular through holes on the four sides of the rigid foam board (103).

2. The planar wooden antenna array according to claim 1, characterized in that, The upper layer of the antenna substrate (102) is a microwave substrate (114) with a dielectric constant of 3.55, and the lower substrate (115) has a dielectric constant of 2.

2.

3. The planar wooden antenna array according to claim 1, characterized in that, The dielectric constant of rigid foam board (103) is 1.

09.

4. The planar wooden antenna array according to claim 1, characterized in that, The overall height of the flat wooden antenna array is 51.6mm; The size of the antenna array can be changed by altering the number of modular antenna elements (101).

Images