A wide-beam multi-band mobile communication antenna for low-orbit satellites

Abstract

The present invention discloses a wide-beam multi-band mobile communication antenna for low-orbit satellites, comprising a UHF band antenna, an S band antenna, a support frame and a base, wherein the support frame is mounted on the base and is used to support the UHF band antenna and the S band antenna; the UHF band antenna comprises a plurality of dielectric plates and a signal phase splitter plate, wherein the plurality of dielectric plates are arranged on the signal phase splitter plate, the dielectric plates and the signal phase splitter plate form an angle, and the plurality of dielectric plates enclose the S band antenna, and the signal phase splitter plate is horizontally arranged on the base; the S band antenna comprises a plurality of antenna units and a plurality of transceiver synthesis units arranged in a ring shape, and the antenna units are connected to the transceiver synthesis units. The wide-beam multi-band mobile communication antenna for low-orbit satellites realizes the coexistence and mutual benefit of dual-band antennas, has strong reliability, has the advantages of broadbandization, ground profile and wide beam, and is easy to be installed on a mobile platform or the top of a building to establish a communication connection with a satellite.

Description

Technical Field

[0001] The invention belongs to the field of antennas, and in particular relates to a wide-beam multi-band mobile communication antenna for a low-orbit satellite. Background Art

[0002] The revolution period of low-orbit communication satellites is relatively short, usually 1.5 to 2 hours. The best communication period is only when the satellite passes overhead. In order to make full use of this period and ensure a certain communication link margin, higher requirements are placed on the antenna beam width. The wider the antenna beam and the higher the low elevation gain, the longer the system can communicate with the satellite and the better the communication quality.

[0003] Most existing antennas are single-band antennas with narrow antenna beams and poor reliability, which cannot meet antenna communication requirements.

[0004] Therefore, how to achieve coexistence and mutual benefit of antennas in different frequency bands while realizing a wide beam of the antenna and improving antenna reliability is a technical problem that technicians in this technical field need to solve. Summary of the invention

[0005] The main technical problem solved by the present invention is to provide a wide-beam multi-band mobile communication antenna for low-orbit satellites, which solves the problems in the prior art that multi-band antennas cannot coexist, the antenna beam is narrow, and the reliability is poor.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide a wide-beam multi-band mobile communication antenna for low-orbit satellites, including a UHF band antenna, an S band antenna, a support frame and a base. The support frame is installed on the base and is used to support the UHF band antenna and the S band antenna; the UHF band antenna includes multiple dielectric plates and a signal phase splitter plate, the multiple dielectric plates are arranged on the signal phase splitter plate, the dielectric plates and the signal phase splitter plate form an angle, and the multiple dielectric plates enclose the S band antenna, the signal phase splitter plate is horizontally arranged on the base, the dielectric plate has a feeder, the signal phase splitter plate has a plurality of lines, and the lines are connected to the feeder; the S band antenna includes multiple antenna units and multiple transceiver synthesis units surrounded in a ring shape, the transceiver synthesis unit is arranged below the antenna unit, and the antenna unit is connected to the transceiver synthesis unit.

[0007] Preferably, there are four dielectric plates, the size of the opening formed by the upper edges of the four dielectric plates together is larger than the size of the opening formed by the lower edges of the four dielectric plates together, and the opening formed by the upper edges of the four dielectric plates together is larger than the diameter of the ring formed by the multiple antenna units in a ring shape.

[0008] Preferably, the acute angle formed by the dielectric plate and the signal phase splitter plate is in the range of 55°-70°.

[0009] Preferably, the feed line includes a first feed line and a second feed line, and along the height direction of the dielectric plate from bottom to top, the first feed line and the second feed line gradually tilt to the left, and the width of the first feed line is smaller than the width of the second feed line.

[0010] Preferably, there are four lines, and they are arranged in a clockwise direction with a phase difference of 90°. The four lines are welded and connected to the first feed lines on the four dielectric plates in a one-to-one correspondence.

[0011] Preferably, the antenna unit includes a first mounting plate and a metal layer, the metal layer is insulated and arranged on the upper surface of the first mounting plate, an interface is arranged on the top of the transceiver combining unit, and the metal layer is electrically connected to the interface.

[0012] Preferably, there is a gap between adjacent antenna units.

[0013] Preferably, the first mounting plate includes a substrate of metal material, a first raised layer of insulating material and a second raised layer of insulating material arranged in sequence from bottom to top, the first raised layer is arranged on the substrate, the second raised layer is arranged on the first raised layer, the metal layer includes a first metal layer and a second metal layer, the first metal layer is covered and arranged on the upper surface of the first raised layer, and the second metal layer is a hollow structure and is arranged on the upper surface of the second raised layer around the periphery of the first raised layer.

[0014] Preferably, it also includes a support frame, which includes multiple support plates, a support plate and multiple support beams. The support plate is arranged below the antenna unit. The multiple support beams are connected to the edges of the support plate and surround the support plate. The support beams are connected to the upper part of the support plate, and the lower part of the support plate is connected to the base. The support plate is used to fit and support multiple antenna units, and the support plate is used to fit and support multiple dielectric plates.

[0015] Preferably, it also includes a shell, which is arranged on the base and covers the UHF band antenna and the S band antenna.

[0016] The beneficial effects of the present invention are as follows: the present invention discloses a wide-beam multi-band mobile communication antenna for low-orbit satellites, including a UHF band antenna, an S band antenna, a support frame and a base, the support frame is installed on the base, and is used to support the UHF band antenna and the S band antenna; the UHF band antenna includes a plurality of dielectric plates and a signal phase splitter plate, the plurality of dielectric plates are arranged on the signal phase splitter plate, the dielectric plates and the signal phase splitter plate form an angle, and the plurality of dielectric plates enclose the S band antenna, the signal phase splitter plate is horizontally arranged on the base, the dielectric plate has a feeder, the signal phase splitter plate has a plurality of lines, and the lines are connected to the feeder; the S band antenna includes a plurality of antenna units and a plurality of transceiver synthesis units surrounded in a ring shape, the transceiver synthesis unit is arranged below the antenna unit, and the antenna unit is connected to the transceiver synthesis unit. The wide-beam multi-band mobile communication antenna for low-orbit satellites realizes the coexistence and mutual benefit of dual-band antennas, has strong reliability, has the advantages of broadband, ground profile and wide beam, and is easy to be installed on a mobile platform or the top of a building to establish a communication connection with a satellite. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of an embodiment of a wide-beam multi-band mobile communication antenna for low-orbit satellites according to the present invention;

[0018] Figure 2 yes Figure 1 An exploded schematic diagram of the illustrated embodiment;

[0019] Figure 3 yes Figure 1 An exploded schematic diagram of the illustrated embodiment (with the housing removed);

[0020] Figure 4 It is a schematic diagram of a dielectric plate in another embodiment of a wide-beam multi-band mobile communication antenna for a low-orbit satellite according to the present invention;

[0021] Figure 5 It is a schematic diagram of a signal phase splitter plate in another embodiment of a wide beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0022] Figure 6 It is a schematic diagram of the connection relationship between the dielectric plate and the signal phase splitter plate in another embodiment of the wide beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0023] Figure 7 It is a schematic diagram of support feet in another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0024] Figure 8 It is a schematic diagram of support feet in another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0025] Fig. 9It is a schematic diagram of a support frame of another embodiment of a wide-beam multi-band mobile communication antenna for a low-orbit satellite according to the present invention;

[0026] Fig.10 It is a schematic diagram of a first mounting plate in another embodiment of a wide-beam multi-band mobile communication antenna for a low-orbit satellite according to the present invention;

[0027] Fig.11 It is a schematic diagram of a metal layer in another embodiment of a wide-beam multi-band mobile communication antenna for a low-orbit satellite according to the present invention;

[0028] Fig.12 It is a schematic diagram of standing wave ratio in another embodiment of the wide beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0029] Fig.13 It is a schematic diagram of a support plate in another embodiment of a wide-beam multi-band mobile communication antenna for a low-orbit satellite according to the present invention;

[0030] Fig.14 It is a cross-sectional view of a support frame in another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0031] Fig.15 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0032] Fig.16 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0033] Fig.17 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0034] Fig.18 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0035] Fig.19 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0036] Fig. 20 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0037] Fig.21 It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention;

[0038] Fig. 22It is a simulation schematic diagram of another embodiment of the wide-beam multi-band mobile communication antenna for low-orbit satellites of the present invention. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0040] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] In the drawings, arrow X indicates the front direction, that is, the front-rear direction, arrow Y indicates the side direction, that is, the left-right direction, and arrow Z indicates the vertical direction, that is, the up-down direction.

[0042] Combination Figure 1 , Figure 2 and Figure 3 The wide beam multi-band mobile communication antenna for low-orbit satellites includes a UHF band antenna 100, an S band antenna S100, a support frame 5 and a base 1. The support frame 5 is installed on the base 1 and is used to support the UHF band antenna and the S band antenna. The UHF band antenna 100 includes a plurality of dielectric plates 2 and a signal phase splitter plate 3. The plurality of dielectric plates 2 are arranged on the signal phase splitter plate 3. The dielectric plates 2 form an angle with the signal phase splitter plate 3, and the plurality of dielectric plates 2 enclose the S band antenna S100. The signal phase splitter plate 3 is horizontally arranged on the base 1. The dielectric plate 2 has a feeder. The signal phase splitter plate 3 There are multiple lines on it, and the lines are connected to the feeder. The S-band antenna S100 includes multiple antenna units S1 and multiple transceiver synthesis units S2 surrounded in a ring. The transceiver synthesis unit S2 is arranged below the antenna unit S1, and the antenna unit S1 is connected to the transceiver synthesis unit S2. The dielectric plate 2 of the UHF band antenna 100 surrounds the S-band antenna S100 to achieve coexistence of dual-band antennas and form a single wide beam. The wide-beam multi-band mobile communication antenna for low-orbit satellites can be installed on the top of mobile platforms such as vehicles and ships or on the top of fixed buildings to establish a long-term communication connection with the satellite.

[0043] Preferably, the size of the UHF band antenna is: length 401mm*width 401mm*height 174mm, which meets the requirements of miniaturization. The operating frequency band of the UHF band antenna is: 335-351MHz, 375-415MHz.

[0044] Preferably, it further comprises a shell 6, which is covered on the base 1 and covers the UHF band antenna 100 and the S band antenna S100.

[0045] Preferably, there are four dielectric plates 2, which are arranged in a surrounding manner on the signal phase branch plate 3. The size of the opening formed by the upper edges of the four dielectric plates 2 is larger than the size of the opening formed by the lower edges of the four dielectric plates 2, and the opening formed by the upper edges of the four dielectric plates 2 is larger than the diameter of the ring formed by the multiple antenna units S1 in a ring shape. The above-mentioned arrangement can ensure that the size of the opening formed by the multiple dielectric plates 2 gradually increases from bottom to top, and the reason why the lower opening formed by the multiple dielectric plates 2 is smaller than the upper opening is because this can meet the axial ratio requirement. The axial ratio is determined by the diameter of the spiral line, that is, the size of the opening. If the lower opening is the same size as the upper opening, the axial ratio is poor in the required frequency band, which will affect the beam width and circular polarization gain.

[0046] The dielectric plate 2 of the UHF band antenna is set to be inclined, which can increase the diameter of the top end (that is, the upper end opening formed by the dielectric plate 2 becomes larger), that is, the upper end opening formed by the dielectric plate 2 is far away from the ring structure composed of multiple antenna units S1 in the S band antenna, reducing the influence of the antenna unit S1 surrounded in a ring shape in the S band antenna on the UHF band antenna radiation pattern. The electromagnetic energy is mainly radiated from the top of the UHF band antenna into the space. If the top of the dielectric plate 2 is too close to the antenna unit S1, the S band antenna is easily coupled with current, thereby forming parasitic radiation, affecting the far-field radiation pattern of the antenna. If the top of the dielectric plate 2 is too far from the antenna unit S1, the opening formed at the top of the dielectric plate 2 is too large, which cannot meet the optimal axial ratio requirement and will also affect the low elevation gain.

[0047] Preferably, the acute angle formed by the dielectric plate 2 and the signal phase branch plate 3 has an angle range of 20°-70°. Specifically, the acute angle formed by the dielectric plate 2 and the signal phase branch plate 3 has an angle range of 55°-70°. The acute angle formed between the dielectric plate 2 and the signal phase branch plate 3 should not be too small, otherwise the feeder on the dielectric plate 2 will be subject to strong interference reflection from the signal phase branch plate 3, which may easily cause impedance mismatch.

[0048] Further preferably, the acute angle formed by the dielectric plate 2 and the signal phase branching plate 3 is 60°.

[0049] Preferably, combined with Figure 4 , Figure 5 and Figure 6These dielectric plates 2 have the same structure, which is convenient for processing and manufacturing. For each dielectric plate 2, the dielectric plate 2 is a straight hexagonal structure as a whole, including a first horizontal side 23 and a second horizontal side 24 arranged horizontally and in parallel, the first horizontal side 23 is located at the upper part, the second horizontal side 24 is located at the lower part, and the length of the first horizontal side 23 is greater than the length of the second horizontal side 24; it also includes a first vertical side 25 and a second vertical side 26 arranged vertically and in parallel, the first vertical side 25 is located at the upper part, and its upper end is combined with the left end of the first horizontal side 23, the second vertical side 26 is located at the lower part, and its lower end is combined with the right end of the second horizontal side 24; it also includes a first hypotenuse 27 and a second hypotenuse 28 arranged obliquely, the upper end of the first hypotenuse 27 is connected to the lower end of the first vertical side 25, the lower end of the first hypotenuse 27 is connected to the left end of the second horizontal side 24, the upper end of the second hypotenuse 28 is connected to the right end of the first horizontal side 23, and the lower end of the second hypotenuse 28 is connected to the upper end of the second vertical side 26.

[0050] Preferably, the feed line includes a first feed line 21 and a second feed line 22. From bottom to top along the height direction of the dielectric plate 2, the first feed line 21 and the second feed line 22 gradually tilt to the left, and the width of the first feed line 21 is smaller than the width of the second feed line 22. Specifically, there is a first feed line 21 and a second feed line 22 on each of the four dielectric plates 2. The four second feed lines 22 are equivalent to forming a four-wall helical antenna. The rotation direction of the second feed line 22 is set to be left-handed along the normal direction of the UHF frequency band antenna. The feeding phase of the four second feed lines 22 is set to be right-handed, so that a right-handed circularly polarized wave with a wider beam can be generated.

[0051] Preferably, the width of the second feed line 22 gradually widens from bottom to top along the height direction of the dielectric plate 2. This arrangement is intended to allow the second feed line 22 to form a conical structure. The conical structure has broadband characteristics, which is beneficial to the wide beam of the antenna. The first feed line 21 plays a drainage role, coupling the current of the signal phase splitter plate 3 line to the second feed line 22, and the width of the first feed line 21 will affect the impedance of the port, so it does not need to be too wide, that is, the width of the first feed line 21 is smaller than the width of the second feed line 22.

[0052] Preferably, the first feeder 21 is strip-shaped, and the first feeder 21 gradually tilts to the left from bottom to top, and the width of the first feeder 21 slightly widens from bottom to top, the top edge 211 of the first feeder 21 is horizontally set, and the bottom end 212 of the first feeder 21 is used to connect to the line feed on the signal phase branch board 3, and the first feeder 21 has two approximately parallel oblique sides, namely a first oblique side 213 and a second oblique side 214, and the first oblique side 213 and the second oblique side 214 are approximately parallel to the first oblique side 27.

[0053] Preferably, the second feed line 22 includes a horizontal extension portion 221 located at the upper end, a widened portion 222 located in the middle, and a connecting portion 223 located at the bottom end, and the horizontal extension portion 221 extends horizontally to the left, the widened portion 222 gradually widens upward from bottom to top, and the connecting portion 223 extends downward to the bottom edge of the dielectric plate 2.

[0054] Preferably, there are four lines, which are defined as line A1, line A2, line A3 and line A4 respectively, and have a phase difference of 90° in the clockwise direction. In order to feed the above-mentioned four second feed lines 22 and form circularly polarized radiation waves, the four lines are welded and connected to the first feed lines 21 on the four dielectric plates 2 one by one to transmit energy to the first feed lines 21.

[0055] Preferably, a main line A0 is arranged on the signal phase branch board 3, and the main line A0 is connected to the line port K1, one end of the main line A0 is connected to the line port K2, and the other end is connected to the line port K3, wherein the line port K2 is respectively connected to a line A1 and a line A4, and the line port K3 is respectively connected to a line A2 and a line A3.

[0056] Preferably, multiple lines on the signal phase branch plate 3 are connected to the feeder on the dielectric plate 2, and high-frequency current is excited on the feeder. Currents of the same frequency will also be induced between different feeders to form an equivalent capacitor. Similarly, an equivalent capacitor will also be formed between the feeder and the base 1, that is, the current on the feeder will be coupled to the base 1, and the current on the base 1 will be transmitted to the feeder position, forming a current loop and forming an equivalent inductance, which plays a role in circuit tuning and can improve the matching effect, thereby expanding the bandwidth, which is beneficial to the wide beam of the antenna. At the same time, the connection structure forming an angle between the dielectric plate 2 and the signal limiting branch plate 3 also enhances the overall structural firmness of the antenna and improves the reliability of the antenna.

[0057] Specifically, multiple lines on the signal phase branch board 3 are directly connected to the first feeder 21, and a high-frequency current is excited on the first feeder 21. The second feeder 22 is close to the first feeder 21, and a capacitive effect is generated between the two. A current of the same frequency is induced on the second feeder 22, which is equivalent to the energy on the first feeder 21 being coupled to the second feeder 22 through an equivalent capacitor.

[0058] The UHF band antenna has a simple structure and is easy to assemble and disassemble. It is also small in size, light in weight, strong in structure and reliable, and has the advantage of a wide beam.

[0059] Coupled feeding is equivalent to introducing a matching network. An equivalent capacitor is formed between the first feeder 21 and the second feeder 22. Similarly, an equivalent capacitor is formed between the second feeder 22 and the base 1. The current on the second feeder 22 will be coupled to the base 1. The current on the base 1 is transmitted to the feeding position of the first feeder 21 to form a current loop and form an equivalent inductance. This is equivalent to connecting capacitors and inductors in series to the circuit, which can play a role in circuit tuning, improve the impedance matching effect, and thus expand the bandwidth.

[0060] Preferably, combined with Figure 7 and Figure 8 A supporting foot 4 is provided on the base 1 , and the supporting foot 4 has a supporting surface 41 , and the supporting surface 41 is used to fit the outer surface of the supporting medium plate 2 to enhance the firmness and stability of the medium plate 2 .

[0061] Preferably, the support foot 4 has a vertically opened fixing groove 42, and a screw hole 421 for fixing is opened on the bottom surface of the fixing groove 42, and a screw hole 421 for fixing is opened on the bottom surface of the fixing groove 42, for example, the support foot 4 is fixed on a base for installing an antenna.

[0062] Preferably, the S-band antenna includes a plurality of antenna units S1 and a plurality of corresponding transceiver synthesis units S2, the plurality of antenna units S1 are mounted on a support frame in an enclosed manner to form a ring, each transceiver synthesis unit S2 is correspondingly arranged below each antenna unit S1, the base 1 is arranged below the transceiver synthesis unit S2, the antenna unit S1 includes a first mounting plate S11 and a metal layer S12, the metal layer S12 is insulated and arranged on the upper surface of the first mounting plate S11, and is electrically insulated from the first mounting plate S11, an interface S21 is arranged on the top of the transceiver synthesis unit S2, and the metal layer S12 is electrically connected to the interface S21, specifically, there is a gap between adjacent antenna units S1, there are eight antenna units S1, there are eight transceiver synthesis units S2, and the eight transceiver synthesis units S2 are arranged in a ring. The antenna unit S1 is in the shape of a ring, and one antenna unit S1 corresponds to a transceiver synthesis unit S2 above and below. There is a gap between the adjacent antenna units S1, that is, the multiple antenna units S1 enclosed in a ring are actually composed of eight independent small units, and the diameter of the ring formed by the eight antenna units S1 is 300mm. The significance of setting the gap is to divide the ring-shaped antenna unit S1 into multiple small units through the gap. The size of each small unit becomes smaller, which can reduce the influence of the entire ring-shaped antenna unit S1 on the radiation pattern and improve the low elevation angle gain. Therefore, the multiple antenna units and the corresponding transceiver synthesis units can be controlled separately, and then the synthetic radiation pattern of the antenna can be changed according to the spatial position of the satellite passing over the top, so that the direction of the antenna can change with the position of the satellite.

[0063] Preferably, combined with Fig. 9, and also includes a support frame 5, which is arranged on the signal phase branch plate 3. The support frame 5 includes multiple support plates 51, a support disk 53 and multiple support beams 52. The support disk 53 is arranged below the antenna unit S1. Multiple support beams 52 are connected to the edges of the support disk 53 and enclose the support disk 53. The side walls of the support beams 52 are correspondingly connected to the upper part of a support plate 51. The lower part of the support plate 51 is inclined inwardly. The lower part of the support plate 51 is connected to the base 1. The support disk 53 is used to fit and support multiple antenna units S1. The support plate 51 is used to fit and support multiple dielectric plates 2, thereby enhancing the support stability of the S-band antenna and the UHF-band antenna.

[0064] Preferably, the angle formed by the support plate 51 and the signal phase branch plate 3 is the same as the angle formed by the dielectric plate 2 and the signal phase branch plate 3. The support plate 51 is used to fit the inner surface of the supporting dielectric plate 2 to enhance the firmness of the dielectric plate 2, and cooperates with the support of the outer surface of the dielectric plate 2 by the above-mentioned support feet 4 to further enhance the stability and firmness of the dielectric plate 2.

[0065] Further preferably, there are four support frames 51 and four support beams 52, and the four support plates 51 are surrounded and enclosed, and the four support beams 52 are surrounded and enclosed to form a rectangular support, each support beam 52 is connected to a support plate 51, and the angle formed by the support plate 51 and the signal phase branch plate 3 is the same as the angle formed by the dielectric plate 2 and the signal phase branch plate 3, the support plate 51 is used to fit the inner surface of the supporting dielectric plate 2 to enhance the firmness of the dielectric plate 2, and cooperate with the support of the support feet 4 on the outer surface of the dielectric plate 2 to further enhance the stability and firmness of the dielectric plate 2.

[0066] Preferably, the inwardly inclined angle of the lower portion of the support plate 51 ranges from 20° to 70°.

[0067] Preferably, the support plate 51 and the support beam 52 are combined with each other on a surface, and the surface where the support beam 52 and the support plate 51 are combined is an inclined surface, and the angle of the inclined surface is the same as the inward inclination angle of the lower part of the support plate 51.

[0068] Preferably, the support surface 41 is provided with screw holes 411 for connecting with the medium plate 2 and the support plate 51 by screws or bolts to enhance the connection stability between the structures.

[0069] Preferably, the inclination angle of the support surface 41 is the same as the inclination angle of the support plate 51 .

[0070] Preferably, the four support beams 52 are enclosed to form a square, which is conducive to uniform support of the support beams 52.

[0071] Preferably, the lower portions of the four support plates 51 are inclined inward, that is, the opening formed by the upper edges of the four support plates 51 is larger than the opening formed by the lower edges of the four support plates 51. This allows the lower edges of the support plates 51 to be stably supported on the one hand, and on the other hand, it can also reduce the space area occupied by the lower edge support of the support plates 51, thereby reducing the overall volume of the support frame 5.

[0072] Preferably, the inclination angle of the support plate 51 is the same as the inclination angle of the medium plate 2 .

[0073] Preferably, the width of the support plate 51 gradually increases from bottom to top, and the body of the support plate 51 gradually tilts leftward from bottom to top, in order to better fit the dielectric plate 2 .

[0074] Preferably, a plurality of mutually cross-connected reinforcing ribs 511 are provided on the body of the support plate 51 . The provision of the reinforcing ribs 511 enhances the structural firmness of the support plate 51 and enhances the supporting stability of the support plate 51 .

[0075] Preferably, the support frame 5 is made of nylon.

[0076] Preferably, combined with Fig.13 The support plate 51 is a straight hexagonal structure as a whole, including a first horizontal side 101 and a second horizontal side 102 arranged horizontally and in parallel, the first horizontal side 101 is located at the upper part, the second horizontal side 102 is located at the lower part, and the length of the first horizontal side 101 is greater than the length of the second horizontal side 102; it also includes a first vertical side 103 and a second vertical side 104 arranged vertically and in parallel, the first vertical side 103 is located at the upper part, and its upper end is combined with the left end of the first horizontal side 101, and the second vertical side 104 is located at the lower part, and its lower end is combined with the right end of the second horizontal side 102; it also includes a first inclined side 105 and a second inclined side 106 arranged obliquely, the upper end of the first inclined side 105 is connected to the lower end of the first vertical side 103, the lower end of the first inclined side 105 is connected to the left end of the second horizontal side 102, the upper end of the second inclined side 106 is connected to the right end of the first horizontal side 101, and the lower end of the second inclined side 106 is connected to the upper end of the second vertical side 104, and the shape of the support plate 1 is adapted to the shape of the medium plate 2.

[0077] Preferably, the side walls of the plurality of support beams 52 are connected to the edges of the support plate 53 and enclose the support plate 53. This arrangement enables the support beams 52 to be connected in a surrounding manner with the support plate 53, thereby enhancing the stability of the support plate 53 itself.

[0078] Preferably, four connecting portions 531 extend from the edge of the support plate 53, and the four connecting portions 531 are respectively connected to the middle positions of the four support beams 52. The setting of the connecting portions 531 enhances the connection stability between the support plate 53 and the support beam 52, making the support of the support plate 53 more stable. At the same time, the setting of the connecting portions 531 also enables the support plate 53 to be quickly disassembled and assembled from the support beam 52, specifically by connecting the support plate 53 and the support beam 52 through screws.

[0079] Further preferably, the connection portion 531 is square, and a screw hole is provided on the connection portion 531 to facilitate fixing with screws.

[0080] Preferably, a first through hole 532 is opened at the center of the support plate 53 , and a plurality of second through holes 533 are opened in a ring shape around the first through hole 532 , and the second through holes 533 correspond to the first through holes 532 in the upper and lower directions.

[0081] Further preferably, the plurality of second via holes 533 are evenly arranged in a ring shape around the center point of the support plate 53 , the second via holes 533 are oblong holes, and each second via hole 533 corresponds to the metal layer S12 above and below.

[0082] Preferably, a supporting foot fixing hole is opened on the lower edge of the supporting plate 51, and the supporting foot fixing hole includes a first supporting foot fixing hole 107 and a second supporting foot fixing hole 108. The first supporting foot fixing hole 107 is located on the lower left side of the supporting plate 51, and the second supporting foot fixing hole 108 is located on the lower right side of the supporting plate 51, that is, the supporting foot fixing hole and the screw hole 411 are fastened together by screws, so that the supporting foot 4 is fitly connected to the supporting plate 51.

[0083] Preferably, combined with Fig.14 The support beam 52 and the support plate 51 are integrally formed to make the structure more solid, or the support beam 52 and the support plate 51 are in surface contact, that is, the edge where the support beam 52 and the support plate 51 are in contact is an inclined surface, which is convenient for fitting the surface of the support plate 51.

[0084] Preferably, the inclination angle of the support surface 41 is the same as the inclination angle of the support plate 51 .

[0085] Preferably, the size of the base 1 is: 480 mm long*480 mm wide.

[0086] Preferably, the base 1 includes a base body 11 and a cover plate 12. A base body opening that passes through from top to bottom is opened in the middle of the base body 11. In order to facilitate the installation of the S-band antenna, the base body 11 has a cavity inside, and the cavity is connected to the outside downward and to the base body opening upward. The cover plate 12 is arranged at the bottom of the base body 11, and the cover plate 12 covers the cavity.

[0087] Preferably, a navigation positioning antenna 7 is provided on the base 1. Specifically, a navigation positioning antenna 7 is provided at two diagonal positions of the base 1 respectively, and a navigation positioning antenna 7 is also provided at the center surrounded by multiple transceiver synthesis units S2 in a ring. The navigation positioning antenna 7 is used for positioning and navigation.

[0088] Preferably, the antenna unit S1 includes a first mounting plate S11 and a metal layer S12, the metal layer S12 is insulated and arranged on the upper surface of the first mounting plate S11, an interface S21 is arranged on the top of the transceiver combining unit S2, and the metal layer S12 is electrically connected to the interface S21.

[0089] Further preferably, multiple antenna units S1 are enclosed to form a ring, the transceiver synthesis unit S2 is arranged below the antenna unit S1, the base 1 is arranged below the transceiver synthesis unit S2, the antenna unit S1 includes a first mounting plate S11 and a metal layer S12, the metal layer S12 is arranged on the upper surface of the first mounting plate S11 and is electrically connected to the first mounting plate S11, an interface S21 is arranged on the top of the transceiver synthesis unit S2, and the metal layer S12 is electrically connected to the interface S21.

[0090] Preferably, there is a gap between adjacent antenna units S1. Specifically, there are eight antenna units S1 and eight transceiver synthesis units S2. The eight transceiver synthesis units S2 are arranged in a ring, and one antenna unit S1 corresponds to one transceiver synthesis unit S2 above and below. There is a gap between adjacent antenna units S1, that is, the multiple antenna units S1 enclosed in a ring are actually composed of eight independent small units spliced ​​together, and the diameter of the ring formed by the eight antenna units S1 is 300 mm. The reason why there are gaps or slits between the multiple antenna units S1 is that the diameter of 300 mm is close to the half wavelength of the highest frequency point of 415 MHz in the UHF band, which will cause resonance and affect the radiation pattern, making the beam narrower and the elevation gain lower. By setting multiple antenna units S1 in a ring shape with gaps between adjacent ones, the S-band antenna can be segmented, so that the size of each small unit is much smaller than the UHF band wavelength, which significantly reduces the impact of the UHF band antenna on its radiation pattern as a whole and improves the low elevation gain.

[0091] Preferably, a first metal plate S13 is disposed below the first mounting plate S11.

[0092] Preferably, specifically, the support plate 53 is horizontally arranged, the support plate 53 is in close contact with and supports the first metal plate S13, the support plate 53 is disc-shaped, and the support plate 53 is adapted to the shape of the plurality of first metal plates S13 arranged in an annular manner.

[0093] Preferably, a feeder for electrically connecting the metal layer S12 is provided in the first mounting plate S11. Specifically, the feeder is vertically arranged, with the lower end of the feeder connected to the first mounting plate S11 and the upper end of the feeder connected to the metal layer S12.

[0094] Preferably, combined with Fig.10 The first mounting plate S11 includes a substrate S111 of metal material, a first raised layer S112 of insulating material and a second raised layer S113 of insulating material, which are arranged in sequence from bottom to top. The substrate S111 is a fan-shaped with sharp corners cut off. The first raised layer S112 is arranged on the substrate S111, and the second raised layer S113 is arranged on the first raised layer S112. The sizes of the substrate S111, the first raised layer S112 and the second raised layer S113 decrease in sequence. The first raised layer S112 is a raised plate-like structure, and the second raised layer S113 is a rectangular parallelepiped shape. The metal layer S12 includes a first metal layer S121 and a second metal layer S122. The first metal layer S121 is covered and arranged on the upper surface of the first raised layer S112. The second metal layer S122 is a hollow structure and is arranged on the upper surface of the second raised layer S113 around the first raised layer S112.

[0095] Preferably, the first metal plate S13 is in the shape of a sector with sharp corners cut off, and the shape is adapted to the shape of the base plate S111 of the first mounting plate S11.

[0096] Further preferably, a first through hole S131 is formed on the first metal plate S13, and the first through hole S131 corresponds to the upper and lower positions of the feeder line, that is, the vertical projection of the feeder line falls into the first through hole S131.

[0097] Preferably, combined with Fig.11 The metal layer S12 includes a first metal layer S121 and a second metal layer S122. The first metal layer S121 is arranged on the upper surface of the first raised layer S112, and the second metal layer S122 is arranged on the upper surface of the second raised layer S113. The first wire D1 and the second wire D2 are arranged inside the first mounting board S11. The first metal layer S121 is connected to the first end of the first wire D1, and the second metal layer S122 is connected to the first end of the second wire D2. Specifically, there are two feeders, the first metal layer S121 is connected to the first end of the first wire D1 through one of the feeders, and the second metal layer S122 is connected to the second wire D2 through another feeder, and the second end of the first wire D1 and the second end of the second wire D2 are connected to the interface S21 at the top of the transceiver synthesis unit S2. More specifically, each transceiver synthesis unit S2 has two interfaces S21 on the top, the second end of the first wire D1 is connected to one of the interfaces S21, and the second end of the second wire D2 is connected to the other interface S21.

[0098] Preferably, the transceiver combining unit S2 is in the shape of a vertical column.

[0099] Preferably, combined with Fig.12 , the antenna standing wave ratio can reach 1.76, which meets the requirement of standing wave ratio less than 2.0.

[0100] The following table shows the influence of whether the dielectric plate 2 is tilted and whether there is a gap between multiple antenna units S1 on the antenna:

[0101]

[0102]

[0103] It can be seen from the above table that the tilting of the dielectric plate 2 and the gaps between the antenna units S1 can broaden the beam width, and at the same time the gain at low elevation angles (60° away from the normal) is significantly improved.

[0104] The following are specific embodiments of the above-mentioned influence of whether the dielectric plate 2 is tilted and whether there are gaps between the multiple antenna units S1 on the antenna:

[0105] 1): The dielectric plate is not tilted, and there is no gap between the antenna units. Fig.15 and Fig.16 .

[0106] At this time, the average gain of 415MHz at a deviation of 60° from the normal direction is about -0.4dBi, and the minimum value is -1.13dBi. The 3dB beam width is between 79° and 90°.

[0107] 2): The dielectric plate is tilted, and there is no gap between the antenna units. Fig.17 and Fig.18 .

[0108] At this time, the average gain of 415MHz at a deviation of 60° from the normal direction is about 0.4dBi, and the minimum value is -0.15dBi. The 3dB beam width is between 86° and 96°.

[0109] 3): The dielectric plate is not tilted, and there is a gap between the antenna units. Fig.19 and Fig. 20 .

[0110] At this time, the average gain of 415MHz at a deviation of 60° from the normal direction is about 0.8dBi, and the minimum value is 0.12dBi. The 3dB beam width is between 85° and 99°.

[0111] 4): The dielectric plate is tilted, and there is a gap between the antenna units. Fig.21 and Fig. 22 .

[0112] At this time, the average gain of the worst frequency point (335MHz) in the frequency band is about 1.1dBi when it deviates from the normal direction by 60°, and the minimum value is 0.22dBi. The 3dB beam width is between 87° and 110°.

[0113] Based on the above embodiments, the present invention discloses a wide-beam multi-band mobile communication antenna for low-orbit satellites, including a UHF band antenna, an S band antenna, a support frame and a base, the support frame is installed on the base, and is used to support the UHF band antenna and the S band antenna; the UHF band antenna includes multiple dielectric plates and a signal phase splitter plate, multiple dielectric plates are arranged on the signal phase splitter plate, the dielectric plates and the signal phase splitter plate form an angle, and multiple dielectric plates enclose the S band antenna, the signal phase splitter plate is horizontally arranged on the base, the dielectric plate has a feeder, the signal phase splitter plate has multiple lines, and the lines are connected to the feeder; the S band antenna includes multiple antenna units and multiple transceiver synthesis units surrounded in a ring shape, the transceiver synthesis unit is arranged below the antenna unit, and the antenna unit is connected to the transceiver synthesis unit. The wide-beam multi-band mobile communication antenna for low-orbit satellites realizes the coexistence and mutual benefit of dual-band antennas, has strong reliability, has the advantages of broadband, ground profile and wide beam, and is easy to install on a mobile platform or the top of a building to establish a communication connection with a satellite.

[0114] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A wide-beam multi-band mobile communication antenna for low-orbit satellites, It is characterized in that It includes a UHF band antenna, an S band antenna, a support frame and a base, wherein the support frame is installed on the base and is used to support the UHF band antenna and the S band antenna; The UHF band antenna comprises a plurality of dielectric plates and a signal phase shunt plate, the plurality of dielectric plates are arranged on the signal phase shunt plate, the dielectric plates and the signal phase shunt plate form an angle, and the plurality of dielectric plates enclose the S band antenna, the signal phase shunt plate is horizontally arranged on the base, the dielectric plate has a feed line, the signal phase shunt plate has a plurality of lines, and the lines are connected to the feed line; The S-band antenna includes a plurality of antenna units and a plurality of transceiver combining units arranged in a ring shape, wherein the transceiver combining unit is arranged below the antenna unit, and the antenna unit is connected to the transceiver combining unit; The antenna unit includes a first mounting plate and a metal layer, the metal layer is insulated and arranged on the upper surface of the first mounting plate, an interface is arranged on the top of the transceiver combining unit, and the metal layer is electrically connected to the interface; The first mounting plate includes a substrate of metal material, a first raised layer of insulating material and a second raised layer of insulating material, which are arranged in sequence from bottom to top. The first raised layer is arranged on the substrate, and the second raised layer is arranged on the first raised layer. The metal layer includes a first metal layer and a second metal layer. The first metal layer is covered and arranged on the upper surface of the first raised layer. The second metal layer is a hollow structure and is arranged on the upper surface of the second raised layer around the periphery of the first raised layer.

2. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 1, It is characterized in that There are four dielectric plates, and the size of the opening formed by the upper edges of the four dielectric plates together is larger than the size of the opening formed by the lower edges of the four dielectric plates together, and the opening formed by the upper edges of the four dielectric plates together is larger than the diameter of the ring formed by the multiple antenna units in a ring shape.

3. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 2, It is characterized in that The acute angle formed by the dielectric plate and the signal phase splitter plate is in the range of 55°-70°.

4. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 3, It is characterized in that The feed line includes a first feed line and a second feed line. From bottom to top along the height direction of the dielectric plate, the first feed line and the second feed line gradually tilt leftward, and the width of the first feed line is smaller than that of the second feed line.

5. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 4, It is characterized in that There are four lines, and they are arranged in a clockwise direction with a phase difference of 90°. The four lines are welded and connected to the first feed lines on the four dielectric plates in a one-to-one correspondence.

6. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 1, It is characterized in that There is a gap between adjacent antenna units.

7. The wide-beam multi-band mobile communication antenna for low-orbit satellite according to claim 1, It is characterized in that It also includes a support frame, which includes multiple support plates, a support plate and multiple support beams. The support plate is arranged below the antenna unit. The multiple support beams are connected to the edges of the support plate and surround the support plate. The support beams are connected to the upper part of the support plate, and the lower part of the support plate is connected to the base. The support plate is used to fit and support the multiple antenna units, and the support plate is used to fit and support the multiple dielectric plates.

8. The wide-beam multi-band mobile communication antenna for low-orbit satellites according to claim 7, It is characterized in that It also includes a shell, which is arranged on the base and covers the UHF band antenna and the S band antenna.

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