An on-board miniaturized broadband omnidirectional antenna
Patent Information
- Application Number
- CN202522108264.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0004]另外，全向天线若要实现宽频带，通常要同时兼顾不同频段的谐振长度，使得天线尺寸难以缩小，甚至还更大；而电小天线技术通常会使天线的工作频带变窄，因此，在同时解决全向的宽带化和小型化问题上存在着矛盾
1、结构紧凑、尺寸小：通过优化金属辐射片的结构设计，采用多个调谐通孔和反L型金属接地柱，在保证宽带性能的同时显著减小了天线的高度和体积，实现了天线的小型化，便于在机载平台等空间受限环境中安装和使用。
Smart Images
Figure CN224817414U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of antenna technology, and in particular to an airborne miniaturized broadband omnidirectional antenna. Background Technology
[0002] In the field of drone or manned aircraft communication, antennas are required to have radiation and reception capabilities in different directions at low elevation angles. Therefore, omnidirectional antennas are often the best choice. Omnidirectional antennas provide full coverage in the horizontal plane and exhibit a beamwidth in the vertical plane.
[0003] Omnidirectional antennas are generally classified into three types: horizontally polarized omnidirectional antennas, vertically polarized omnidirectional antennas, and circularly polarized omnidirectional antennas. Omnidirectional antennas mainly include helical antennas, waveguide slot antennas, monopole antennas, and dipole antennas. With the development of modern communication technology, antennas are required to have wide bandwidth while becoming increasingly smaller. This effectively reduces the overall platform RCS, increases platform mobility, and improves antenna concealment. Furthermore, limitations in antenna installation space often place even higher demands on antennas.
[0004] In addition, to achieve a wide bandwidth, an omnidirectional antenna usually needs to take into account the resonant length of different frequency bands, making it difficult to reduce the antenna size, and sometimes even making it larger; while electrically small antenna technology usually narrows the operating bandwidth of the antenna. Therefore, there is a contradiction in solving the problems of omnidirectional broadband and miniaturization at the same time.
[0005] Monopole antennas are typical omnidirectional antennas and are commonly used in airborne communication. However, they have a narrow operating bandwidth and a high antenna profile. Therefore, broadbanding and miniaturization are urgent problems to be solved. Utility Model Content
[0006] This invention proposes an airborne miniaturized broadband omnidirectional antenna.
[0007] The technical solution adopted by this utility model includes: An airborne miniaturized broadband omnidirectional antenna is characterized by comprising a metal radiating plate 1, a metal base 2, a metal grounding post 3, a dielectric support 6, and an RF feed connector 7. The metal radiating plate 1 is vertically fixed above the metal base 2 by the dielectric support 6, and a gap is left between the metal radiating plate 1 and the metal base 2; the radio frequency feed connector 7 is installed on the lower surface of the metal base 2, and its inner core passes through the metal base 2 and is connected to the bottom of the metal radiating plate 1. The metal radiating plate 1 has multiple tuning through holes 4. One end of the metal grounding post 3 is connected to one of the tuning through holes 4 of the metal radiating plate 1, and the other end is connected to the metal base 2.
[0008] Furthermore, the metal grounding post 3 has an inverted L-shaped structure, with its short branches perpendicular to the metal radiating plate 1 and connected to one of the tuning through holes 4 of the metal radiating plate, and its long branches perpendicular to and connected to the upper surface of the metal base.
[0009] Furthermore, the metal base 2 is made of conductive metal material and has a metal grounding post welding hole 5 on it: the end of the metal grounding post 3 is welded into the metal grounding post welding hole 5.
[0010] Furthermore, the metal base 2 is also provided with a medium support slot 9. There are two medium supports, and the medium supports and the medium support slots 9 correspond one to one. The medium support is installed in the corresponding medium support slot 9, and its top end is fixedly connected to the metal radiating sheet 1.
[0011] Furthermore, the bottom edge of the metal radiating sheet 1 is provided with a gap 8; the inner core of the radio frequency feed connector 7 is welded to the gap.
[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. Compact structure and small size: By optimizing the structural design of the metal radiating plate, adopting multiple tuning through holes and inverted L-shaped metal grounding posts, the height and volume of the antenna are significantly reduced while ensuring broadband performance, realizing the miniaturization of the antenna, which is convenient for installation and use in space-constrained environments such as airborne platforms.
[0013] 2. Excellent broadband performance: Through the synergistic effect of the tuning via and the metal grounding post, the impedance matching and voltage standing wave ratio (VSWR) of the antenna are effectively adjusted, which expands the working bandwidth of the antenna and enables it to maintain good radiation characteristics in a wide frequency range.
[0014] 3. Stable omnidirectional radiation characteristics: The antenna achieves omnidirectional coverage in the horizontal plane and has a certain beamwidth in the vertical plane, which is suitable for the needs of low elevation angle multi-directional communication in UAV or manned aircraft communication.
[0015] 4. Stable mechanical structure: The antenna adopts a combination of dielectric support and metal base, and is fixed by slots and screws, which enhances the mechanical strength and environmental adaptability of the antenna, making it suitable for harsh airborne environments such as high speed and high vibration.
[0016] 5. Easy installation and debugging: The tuning through-hole design on the metal radiating plate makes it easy to select grounding posts of different lengths for welding, which facilitates the optimization of antenna performance during debugging and improves production efficiency and maintainability. Attached Figure Description
[0017] Figure 1 A structural diagram of an airborne miniaturized broadband omnidirectional antenna provided for an embodiment of this utility model; Figure 2This is a structural diagram of the metal radiating sheet provided in an embodiment of the present invention; Figure 3 A top view of the metal base provided in an embodiment of this utility model.
[0018] Explanation of reference numerals in the attached diagram: 1- Metal radiating plate, 2- Metal base, 3- Metal grounding post, 4- Tuning through hole, 5- Metal grounding post welding hole, 6- Dielectric support, 7- RF feed connector, 8- Gap, 9- Dielectric support slot. Detailed Implementation
[0019] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. It is understandable to those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings; To explain the structure and features of this utility model in detail, the technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.
[0020] An airborne miniaturized broadband omnidirectional antenna is characterized by comprising a metal radiating plate 1, a metal base 2, a metal grounding post 3, a dielectric support 6, and an RF feed connector 7. The metal radiating plate 1 is vertically fixed above the metal base 2 by the dielectric support 6, and a gap is left between the metal radiating plate 1 and the metal base 2; the radio frequency feed connector 7 is installed on the lower surface of the metal base 2, and its inner core passes through the metal base 2 and is connected to the bottom of the metal radiating plate 1. The metal radiating plate 1 has multiple tuning through holes 4. One end of the metal grounding post 3 is connected to one of the tuning through holes 4 of the metal radiating plate 1, and the other end is connected to the metal base 2.
[0021] Furthermore, the metal grounding post 3 has an inverted L-shaped structure, with its short branches perpendicular to the metal radiating plate 1 and connected to one of the tuning through holes 4 of the metal radiating plate, and its long branches perpendicular to and connected to the upper surface 1 of the metal base.
[0022] Furthermore, the metal base 2 is made of conductive metal material and has a metal grounding post welding hole 5 on it: the end of the metal grounding post 3 is welded into the metal grounding post welding hole 5.
[0023] Furthermore, the metal base 2 is also provided with a medium support slot 9. There are two medium supports, and the medium supports and the medium support slots 9 correspond one to one. The medium support is installed in the corresponding medium support slot 9, and its top end is fixedly connected to the metal radiating sheet 1.
[0024] Furthermore, the bottom edge of the radiating metal sheet 1 is provided with a gap 8; the inner core of the radio frequency feed connector 7 is welded to the gap.
[0025] The following is a more specific example: See Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a structural diagram of an airborne miniaturized broadband omnidirectional antenna according to this utility model. Figure 2 This is a structural diagram of the metal radiating sheet provided in an embodiment of the present invention. Figure 3 This is a top view of the metal base of this utility model. In summary, this utility model provides an airborne miniaturized broadband omnidirectional antenna, which includes a metal radiating plate 1, a metal base 2, a metal grounding post 3, a tuning through-hole 4, a metal grounding post welding hole 5, a dielectric support 6, an RF feed connector 7, a slot 8, and a dielectric support slot 9.
[0026] In this embodiment, see Figure 2 The metal radiating plate 1 has a thickness of 1mm, a maximum width of 160mm, and a height less than one-quarter wavelength of the low-frequency band. Eight tuning through-holes 4 are located at the center of the metal radiating plate 1, and a slit 8 is located on its bottom edge. The bottom of the metal radiating plate 1 is connected to the dielectric support 6 by screws. The slit 8 has an opening of 2.2mm and is used to insert and weld the inner core of a 50Ω RF feed connector. The tuning through-holes 4 are 2.5mm in diameter, spaced 10mm apart, and located on the central axis of the metal radiating plate 1. Metal grounding posts 3 of different lengths can be selected and welded to the tuning through-holes 4. The metal grounding posts 3 have a diameter of 2.2mm and are in an inverted "L" shape. One bent end of the metal grounding post 3 is welded to the metal radiating plate 1 through the tuning through-holes 4, and the other end of the metal grounding post 3 is welded to the metal base 2 through the metal grounding post welding hole 5. The main functions of the metal grounding post 3 and the tuning via 4 are to adjust the voltage standing wave ratio (VSWR) of the antenna and to adjust the impedance matching of the antenna. The structural parameters of the metal grounding post 3 can be optimized to optimize the voltage standing wave ratio of the antenna.
[0027] In this embodiment, the dielectric support 6 is made of nylon with a thickness of 2.5 mm, is L-shaped, and consists of 2 pairs of 4 supports. The upper end of the dielectric support 6 is connected to the metal radiating plate 1 by screws, and the lower end of the dielectric support 6 is placed in the dielectric support slot 9 and connected to the metal base 2 by screws. The dielectric support 6 mainly serves to fix and support the metal radiating plate 1.
[0028] In this embodiment, see Figure 3 The metal base 2 is made of conductive aluminum oxide material, with a length of 206mm, a width of 66mm, and a thickness of 5.5mm. The metal base 2 has one metal grounding post welding hole 5 with a depth of 3.8mm and a diameter of 4.5mm, and two dielectric support slots 9 with a depth of 2.5mm, a length of 26mm, and a width of 8mm.
[0029] The parts of this utility model not described in detail are techniques that belong to those skilled in the art.
[0030] The above description is merely a preferred embodiment of this utility model, intended to further illustrate the utility model, and not to limit it. Any simple substitutions made based on the content disclosed in the above text and drawings are within the scope of protection of this patent.
Claims
1. An airborne miniaturized broadband omnidirectional antenna, characterized in that, Includes a metal radiating plate (1), a metal base (2), a metal grounding post (3), a dielectric support (6), and a radio frequency feed connector (7). The metal radiating plate (1) is vertically fixed above the metal base (2) by a dielectric support (6), and there is a gap between the metal radiating plate (1) and the metal base (2); the radio frequency feed connector (7) is installed on the lower surface of the metal base (2), and its inner core passes through the metal base (2) and is connected to the bottom of the metal radiating plate (1); The metal radiating plate (1) has multiple tuning through holes (4). One end of the metal grounding post (3) is connected to one of the tuning through holes (4) of the metal radiating plate (1), and the other end is connected to the metal base (2).
2. The airborne miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The metal grounding post (3) has an inverted L-shaped structure. Its short branches are perpendicular to the metal radiating plate (1) and connected to one of the tuning through holes (4) of the metal radiating plate. Its long branches are perpendicular to and connected to the upper surface of the metal base.
3. The airborne miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The metal base (2) is made of conductive metal material and has a metal grounding post welding hole (5) on it: the end of the metal grounding post (3) is welded into the metal grounding post welding hole (5).
4. The airborne miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The metal base (2) is also provided with a medium support slot (9). There are two medium supports, and the medium supports and the medium support slots (9) correspond one to one. The medium support is installed in the corresponding medium support slot (9), and its top end is fixedly connected to the metal radiating sheet (1).
5. The airborne miniaturized broadband omnidirectional antenna according to claim 1, characterized in that, The bottom edge of the metal radiating sheet (1) has a gap (8); the inner core of the radio frequency feed connector (7) is welded to the gap.