Miniature flat-panel circularly polarized antenna for satellite communication devices and satellite communication devices

Abstract

This invention provides a small planar circularly polarized antenna for satellite communication devices and the satellite communication device itself, comprising: a substrate, a radiating plate, and a bridge circuit; the substrate is placed below the radiating plate, and the substrate and the radiating plate are connected by the bridge circuit; the radiating plate has four feed points, which are connected to four sets of spiral arms via the bridge circuit, and each set of spiral arms has a metal micro-strip line at one end, with a perturbation unit on the metal micro-strip line. The small planar circularly polarized antenna proposed in this solution has a volume only 1 / 7 that of a traditional parabolic antenna, making it suitable for integration into mobile terminals.

Description

Technical Field

[0001] This utility model relates to the field of satellite antenna technology, specifically to a small flat circularly polarized antenna for satellite communication devices and a satellite communication device. Background Technology

[0002] With the booming development of satellite communication and the trend of miniaturization of satellite communication terminals, the placement and space of antennas are subject to certain restrictions. Oversized and expensive antennas greatly limit the use of satellite terminals. Miniaturization of satellite antennas has become an urgent need. Meeting the requirements of antenna performance indicators while miniaturizing the antenna is a difficult challenge. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a small flat-panel circularly polarized antenna for satellite communication devices and a satellite communication device.

[0004] The small flat circularly polarized antenna for satellite communication devices provided by this utility model includes: a substrate, a radiating plate, and a bridge circuit. The substrate is placed below the radiating plate, and the substrate and the radiating plate are connected by a bridge circuit. The radiating plate has four feed points, which are connected to four sets of spiral arms via a bridge. Each set of spiral arms has a metal micro-strip line at one end, and a micro-perturbation unit is provided on the metal micro-strip line.

[0005] Preferably, the bridge is a 3dB bridge.

[0006] Preferably, the metal microstrip line is provided with a matching branch, which is in the form of open circuit, short circuit or inductor-capacitor matching.

[0007] Preferably, the substrate is a cube.

[0008] Preferably, the radiating plate is a cube.

[0009] Preferably, the substrate or radiating plate is a solid or a hollow cube formed by rolling a flexible circuit board.

[0010] Preferably, the substrate used is a PCB substrate.

[0011] Preferably, the antenna size is mm.

[0012] The satellite communication device provided by this utility model includes the aforementioned small flat circularly polarized antenna for satellite communication devices.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The proposed planar miniature circularly polarized antenna is only 1 / 7 the size of a traditional parabolic antenna, making it suitable for integration into mobile terminals. The PCB etching process simplifies the manufacturing process, reducing costs by 30% compared to an eight-arm spiral antenna. Impedance is adjusted through a microstrip line matching section to adapt to satellite Tx / Rx dual-band frequencies. Through structural innovation and material selection, the miniaturization and performance compatibility issues of satellite terminal antennas are solved. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural diagram of a small planar circularly polarized antenna. Figure 2 The diagram shows the return loss of the antenna. Figure 3 The antenna gain at each frequency point in the tested frequency band; Figure 4 This is the 2D radiation pattern of the antenna; Figure 5 This refers to the circular polarization axial ratio parameter of the antenna; Figure 6 This is the 3D radiation pattern of the antenna. Detailed Implementation

[0015] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0016] Example like Figure 1 This solution provides a small, circularly polarized planar antenna for satellite communication devices, comprising a substrate 1 and a radiating plate 2. The substrate 1 is located below the radiating plate 2 and connected via a bridge 3. The substrate 1 used is a high-dielectric-constant PCB substrate. The high-dielectric-constant PCB substrate allows the metal microstrip lines of the radiating plate 2 to achieve the antenna's radiation efficiency and radiation direction with a relatively small size, which is beneficial for reducing the antenna size. The antenna size is only 50*50*6.6mm.

[0017] The radiating plate 2 has four feed points on it. These four feed points are connected to four sets of spiral-arm metal micro-strip lines via a bridge 3. Each single arm of the bridge has a perturbation unit. By separating the degenerate mode characteristics through geometric perturbation, the circularly polarized antenna can transmit / receive radio frequency signals in a circularly polarized manner. The bridge 3 is a 3dB bridge.

[0018] One end of the first spiral arm has a first metal micro-strip line, and the first metal micro-strip line has a matching branch. The matching branch can be an open circuit, a short circuit, or an inductor-capacitor matching form. Circular polarization radiation is achieved by separating the degenerate model characteristics through geometric perturbation.

[0019] One end of the second spiral arm has a second metal micro-strip line, which has a matching branch. The matching branch can be an open circuit, a short circuit, or an inductor-capacitor matching form. Circular polarization radiation is achieved by separating the degenerate model characteristics through geometric perturbation.

[0020] One end of the third spiral arm has a third metal micro-strip line, which has matching branches. The matching branches can be open circuit, short circuit, or inductor-capacitor matching. Circular polarization radiation is achieved by separating the degenerate model characteristics through geometric perturbation.

[0021] One end of the fourth spiral arm has a fourth metal micro-strip line, which has a matching branch. The matching branch can be an open circuit, a short circuit, or an inductor-capacitor matching form. Circular polarization radiation is achieved by separating the degenerate model characteristics through geometric perturbation.

[0022] The substrate 1 is a cube, which can be a solid or a hollow cube made by rolling up a flexible circuit board.

[0023] Radiation plate 2 is a cube, which can be a solid or a hollow cube made by rolling up a flexible circuit board.

[0024] The following reference experiment was conducted, transmitting radio frequency signals in a 3D microwave anechoic chamber to experimentally demonstrate that the aforementioned small planar circularly polarized antenna for satellite communication devices can transmit / receive radio frequency signals in a circularly polarized manner. The 3D microwave anechoic chamber test data is shown in Table 1. The first column of Table 1 represents the frequency, i.e., transmit frequency / receive frequency, in MHz; the second column represents the zenith gain, i.e., antenna vertex gain, in dBi; the third column also represents the horizontal gain, i.e., the antenna gain above a certain horizontal angle, in dBi; the fourth column represents the antenna polarization; the fifth column represents the axial ratio, in dB; the sixth column represents the passive VSWR; and the seventh column represents the characteristic impedance, in ohms. This invention also obtained various parameter diagrams of the antenna through actual anechoic chamber testing. Figure 2 This is a diagram of the antenna's return loss. The return loss in both the receiving and transmitting frequency bands is below -10dB, indicating that the antenna has very low return reflection and high efficiency. Figure 3 It is the antenna gain at each frequency point in the tested frequency band. Figure 4 This is the 2D radiation pattern of the antenna. Figure 5 It is the axial ratio parameter of the antenna's circular polarization. Figure 6This is the 3D radiation pattern of the antenna.

[0025] Table 1 3D Microwave Anechoic Chamber Test Data

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A small, flat-panel circularly polarized antenna for satellite communication devices, characterized in that, include: The substrate (1), the radiating plate (2), and the bridge (3) are arranged in a manner that the substrate (1) is placed below the radiating plate (2) and the substrate (1) is connected to the radiating plate (2) by the bridge (3).

2. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, The bridge (3) is a 3DB bridge.

3. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, The radiating plate (2) has four feed points, which are connected to four sets of spiral arms via a bridge (3). Each set of spiral arms has a metal micro-wire line at one end, and a micro-perturbation unit is provided on the metal micro-wire line.

4. The small planar circularly polarized antenna for satellite communication devices according to claim 3, characterized in that, The metal microstrip line is provided with matching branches, which can be in the form of open circuit, short circuit or inductor-capacitor matching.

5. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, The substrate (1) is a cube.

6. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, The radiating plate (2) is a cube.

7. The small planar circularly polarized antenna for satellite communication devices according to claim 5 or 6, characterized in that, The substrate (1) or radiating plate (2) is a solid or a hollow cube formed by rolling a flexible circuit board.

8. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, The substrate (1) used is a PCB substrate.

9. The small planar circularly polarized antenna for satellite communication devices according to claim 1, characterized in that, Antenna size is mm.

10. A satellite communication device, characterized in that, A small, flat-panel circularly polarized antenna for a satellite communication device, comprising any one of claims 1 to 9.

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