An L-band multi-element antenna

Abstract

The present invention discloses an L-band multi-element antenna, comprising a dipole tube, a feed network disposed within the dipole tube, and a plurality of vertically arranged dipoles mounted on the dipole tube via a support assembly. Feeder lines extending from the feed network connect the dipoles, and a base supporting the dipole tubes is disposed at the bottom end of the dipole tube. This L-band multi-element antenna is compact and lightweight, while maintaining high radiation performance in the horizontal plane and exhibiting high horizontal gain.

Description

Technical Field

[0001] The invention belongs to the field of satellite antennas, and in particular relates to an L-band multi-element antenna. Background Art

[0002] Antenna gain refers to the ratio of the power density of the signal generated by an actual antenna and an ideal radiating element at the same point in space under the condition of equal input power. Antenna gain is used to measure the antenna's ability to send and receive signals in a specific direction. Existing L-band multi-element antennas cannot guarantee high radiation performance in the horizontal plane. They have low horizontal gain, a small coverage range, and relatively limited application scenarios. At the same time, they are also large in size and heavy in weight.

[0003] Therefore, how to make the L-band multi-element antenna have a high level of gain while being small in size and light in weight is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The main technical problem solved by the present invention is to provide an L-band multi-element antenna, which solves the problems of large size, heavy weight and low horizontal gain of L-band antennas in the prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is to provide an L-band multi-diopter antenna, including a dipole tube, a feeding network is arranged inside the dipole tube, and a plurality of dipoles arranged vertically in sequence are arranged on the dipole tube through a supporting assembly. The feeding network extends a feeding line for connecting the dipoles, and a base for supporting the dipole tube is provided at the bottom end of the dipole tube.

[0006] In another embodiment of the L-band multi-diopter antenna of the present invention, the diopter includes a first diopter, a second diopter and a third diopter, wherein the first diopter and the second diopter constitute a diopter unit, and the first diopter is located below the second diopter, and a plurality of the diopter units are arranged at equal intervals from bottom to top on the diopter tube, and the third diopter is arranged between adjacent diopter units.

[0007] In another embodiment of the L-band multi-element antenna of the present invention, the first element, the second element and the third element are each provided with a first opening and a second opening that are connected up and down, the diameter of the first opening is smaller than the diameter of the second opening, and the element tube passes through the first opening and the second opening to connect each of the elements.

[0008] In another embodiment of the L-band multi-element antenna of the present invention, a feeding hole is opened on the first element, and the feeding line passes through the feeding hole to connect to the second element, wherein the outer shell of the feeding line is electrically connected to the first element, and the inner core of the feeding line is electrically connected to the second element.

[0009] In another embodiment of the L-band multi-element antenna of the present invention, a first flange and a second flange are provided on the base, the first flange is adapted to the dipole tube, the dipole tube can be inserted into and fixed in the first flange, the first flange is provided with a through hole for connecting a feed connector, the second flange has an upwardly extending vertical plate, the vertical plate is provided with a through hole for fixing the feed connector, and the feed network is electrically connected to the feed connector by a connecting wire passing through the through hole.

[0010] In another embodiment of the L-band multi-element antenna of the present invention, the support assembly includes a positioning card, a first supporting plate adapted thereto is provided on the positioning card, the first vibrator is provided on the first supporting plate, a metal ring is provided on the first opening of the first vibrator, a metal tube is provided on the metal ring, the second vibrator is sleeved on the outside of the metal tube, a second supporting plate is provided above the metal tube, and a positioning sleeve for fixing and positioning the third vibrator is provided on the second supporting plate.

[0011] In another embodiment of the L-band multi-element antenna of the present invention, a support ring for supporting the inner wall of the second element is further provided on the element tube.

[0012] In another embodiment of the L-band multi-element antenna of the present invention, the feeding lines in adjacent element units are arranged in a staggered manner, and the staggered angle is 90 degrees.

[0013] In another embodiment of the L-band multi-element antenna of the present invention, an opening for extending the feeder line is provided on the dipole tube.

[0014] In another embodiment of the L-band multi-element antenna of the present invention, the feeding network is a power splitter.

[0015] The present invention provides an L-band multi-element antenna comprising a dipole tube, a feed network disposed within the dipole tube, a plurality of dipoles arranged vertically in sequence on the dipole tube via a support assembly, feed lines extending from the feed network for connecting the dipoles, and a base disposed at the bottom end of the dipole tube for supporting the dipole tube. This L-band multi-element antenna is compact and lightweight while maintaining high radiation performance in the horizontal plane and exhibiting high horizontal gain. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic diagram of an embodiment of an L-band multi-element antenna according to the present invention;

[0017] Figure 2 yes Figure 1 A partial exploded schematic diagram of part A of the embodiment shown;

[0018] Figure 3 yes Figure 1 A partial cross-sectional view of the embodiment shown;

[0019] Figure 4 yes Figure 1 A partially exploded schematic diagram of part B of the embodiment shown;

[0020] Figure 5 yes Figure 1 A partial cross-sectional view of the illustrated embodiment B;

[0021] Figure 6 This is a schematic diagram of the connection between the dipole tube and the base in another embodiment of the L-band multi-dipole antenna of the present invention;

[0022] Figure 7 This is a schematic diagram of the connection between the antenna cover and the base in another embodiment of the L-band multi-element antenna of the present invention;

[0023] Figure 8 This is a radiation characteristic diagram of another embodiment of the L-band multi-element antenna of the present invention;

[0024] Figure 9 This is a radiation characteristic diagram of another embodiment of the L-band multi-element antenna of the present invention. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are shown 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. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0026] 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.

[0027] Figure 1 1 is a schematic diagram of an embodiment of an L-band multi-element antenna according to the present invention. Figure 2 yes Figure 1 The partially exploded schematic diagram of part A of the embodiment shown is as follows: Figure 3 yes Figure 1 A partial cross-sectional view of the embodiment shown, Figure 4 yes Figure 1 The partially exploded schematic diagram of part B of the embodiment shown is as follows: Figure 5 yes Figure 1 A partial cross-sectional view of the embodiment B shown, Figure 6This is a schematic diagram of the connection between the dipole tube and the base in another embodiment of the L-band multi-dipole antenna of the present invention. Figure 7 This is a schematic diagram of the connection between the antenna cover and the base in another embodiment of the L-band multi-element antenna of the present invention, combined with Figures 1 to 7 The L-band multi-element antenna includes an oscillator tube 1, a feeding network is arranged inside the oscillator tube 1, a plurality of oscillators arranged vertically in sequence are arranged on the oscillator tube 1 through a supporting assembly 2, a feeding line 3 for connecting the oscillators is extended from the feeding network, and a base 4 for supporting the oscillator tube 1 is provided at the bottom end of the oscillator tube 1.

[0028] Preferably, the vibrator includes a first vibrator 5, a second vibrator 6 and a third vibrator 7, wherein the first vibrator 5 and the second vibrator 6 constitute a vibrator unit, and the first vibrator 5 is located below the second vibrator 6, and a plurality of the vibrator units are arranged at equal intervals from bottom to top on the vibrator tube 1, and the third vibrator 7 is arranged between adjacent vibrator units.

[0029] Further preferably, this form of superimposed arrangement of the vibrators can form an array in the vertical direction, so that the width of the beam in this direction becomes narrower, the gain in the horizontal direction becomes larger, and signals at a longer distance in the horizontal direction can be received.

[0030] Further preferably, the first vibrator 5 and the second vibrator 6 constitute a dipole antenna, and the third vibrator 7 is an isolation vibrator. The isolation vibrator can remove the mutual coupling between the vibrators. Without the isolation vibrator, the gain of the array composed of the above vibrators will not be improved.

[0031] Further preferably, in this embodiment, four vibrator units are provided, and the third vibrator 7 is not provided above the vibrator unit at the uppermost end of the vibrator tube 1 (there is no dipole antenna above, so there is no need to provide an isolation vibrator), and the top end of the vibrator tube 1 is exposed for easy welding.

[0032] Preferably, the first vibrator 5, the second vibrator 6 and the third vibrator 7 are each provided with a first opening 8 and a second opening 9 that are connected up and down, the diameter of the first opening 8 is smaller than the diameter of the second opening 9, and the vibrator tube 1 passes through the first opening 8 and the second opening 9 to connect the vibrators.

[0033] Further preferably, the first opening 8 of the first vibrator 5 faces upward, and the first opening 8 of the second vibrator 6 faces downward, that is, the small-diameter opening of the first vibrator 5 corresponds to the small-diameter opening of the second vibrator 6, so that the first vibrator 5 and the second vibrator 6 form a dipole antenna. There is no specific requirement for the opening direction of the third vibrator 7, and it can face either upward or downward.

[0034] Preferably, a feeding hole is opened on the first vibrator 5, and the feeding line 3 passes through the feeding hole to connect to the second vibrator 6, wherein the outer shell 31 of the feeding line 3 is electrically connected to the first vibrator 5, and the inner core 32 of the feeding line 3 is electrically connected to the second vibrator 6.

[0035] Further preferably, the feeding network is a power divider, and in this embodiment, the feeding network is a one-to-four power divider, which is placed in the vibrator tube 1, and extends four feeding wires 3 corresponding to the four feeding holes. The four feeding wires 3 pass through the corresponding feeding holes, and the outer shell 31 of each feeding wire 3 is welded to the corresponding first vibrator 5, and the inner core 32 of each feeding wire 3 is welded to the corresponding second vibrator 6.

[0036] Further preferably, the vibrator tube 1 is provided with an opening 12 for extending the feeder line 3 . The opening 12 facilitates extending the feeder line 3 from the vibrator tube 1 to connect with the corresponding first vibrator 5 and second vibrator 6 . The openings 12 are located near the corresponding first vibrator 5 and second vibrator 6 . In this embodiment, there are four openings 12 .

[0037] Further preferably, the opening 12 is square in shape, so as to facilitate the feeder line 3 to extend from the dipole tube 1 to feed the antenna.

[0038] Further preferably, the arrangement direction of the feeders 3 in adjacent vibrator units is staggered, and the staggered angle is 90 degrees, that is, the feeders 3 in different vibrator units are not arranged at the same position. For example, in this embodiment, there are four vibrator units, namely, the first vibrator unit, the second vibrator unit, the third vibrator unit, and the fourth vibrator unit from bottom to top. The angle between the feeder of the first vibrator unit and the feeder of the second vibrator unit and the center of the vibrator tube in the horizontal plane is 90 degrees, the angle between the feeder of the second vibrator unit and the feeder of the third vibrator unit and the center of the vibrator tube in the horizontal plane is 90 degrees, the angle between the feeder of the third vibrator unit and the feeder of the fourth vibrator unit and the feeder of the first vibrator unit and the center of the vibrator tube is 90 degrees, and the four feeders are arranged in sequence clockwise or counterclockwise from bottom to top along with the corresponding vibrator unit. This 90-degree phase difference setting makes the antenna pattern symmetrical. The pattern of a single vibrator is obviously biased towards the feeding point, and the rotational symmetry of the feeding point positions of the four vibrators makes the array pattern symmetrical.

[0039] In a top view, the four feed lines 3 are connected to the vibrator at four points on a circle, and the four points bisect the circle.

[0040] Preferably, a first flange 41 and a second flange 42 are provided on the base 4, the first flange 41 is adapted to the vibrator tube 1, and the vibrator tube 1 can be inserted into and fixed in the first flange 41, the first flange 41 is provided with a through hole 411 for connecting the feed connector, and the second flange 42 has an upwardly extending vertical plate 43, and the vertical plate 43 is provided with a through hole 431 for fixing the feed connector, and the feed network is electrically connected to the feed connector by passing a connecting line through the through hole 411.

[0041] Preferably, a fixing hole 412 is opened on the first flange 41 , and a fixing hole 13 is opened at the lower end of the vibrator tube 1 . Rivets pass through the fixing holes 412 and 13 to fix the vibrator tube 1 and the base 4 together.

[0042] Preferably, a screw hole L1 for screws to pass through is further provided on the base 4. The antenna can be fixed to a certain plane by screws passing through the screw hole L1.

[0043] Preferably, the support assembly 2 includes a positioning card 21, on which a first support plate 22 adapted thereto is provided, on which the first support plate 22 is provided the first vibrator 5, on which a metal ring 23 is provided the first opening 8 of the first vibrator 5, on which a metal tube 24 is provided the metal ring 23, on which the second vibrator 6 is sleeved on the outside of the metal tube 24, above which a second support plate 25 is provided, and on which a locking sleeve 26 for fixing and locking the third vibrator 7 is provided.

[0044] Preferably, the first support plate 22, the positioning card 21 and the second support plate 25 play the role of support, positioning and isolation, supporting and fixing the vibrator and isolating the upper and lower vibrators. One end of the metal ring 23 is connected to the metal tube 24, and the other end is connected to the vibrator tube 1, so that the vibrator can be grounded through the metal tube 24.

[0045] Preferably, the vibrator tube 1 is further provided with a support ring 11 for supporting the inner wall of the second vibrator 6. The support ring 11 can support and fix the second vibrator 6 on the vibrator tube 1 to prevent it from loosening.

[0046] Preferably, the antenna has a radome Z1, which can protect the antenna system from the influence of the external environment. It has good electromagnetic wave penetration characteristics in electrical performance and can withstand harsh external environments in mechanical performance.

[0047] Preferably, Figure 7 In the embodiment, a feeding connector J1 is fixed on the through hole 431 , and a connector opening K1 for exposing the feeding connector J1 is provided at the lower portion of the antenna cover Z1 .

[0048] Depend on Figure 8It can be seen from the antenna gain diagram when the azimuth angle φ = 0 degrees that at frequencies of 1.43GHz, 1.565GHz and 1.7GHz, the corresponding maximum antenna gain values are 7.5105dBi, 7.9609dBi and 6.5741dBi respectively, all greater than 6.5dBi. Figure 9 It can be seen from the horizontal radiation pattern of the antenna when the meridian angle θ=90 degrees that the out-of-roundness of the antenna in the horizontal plane is less than 0.4 dB, and the radiation in the horizontal direction is uniform.

[0049] Based on the above embodiments, the present invention discloses an L-band multi-element antenna, comprising a dipole tube, a feed network disposed within the dipole tube, and a plurality of vertically arranged dipoles mounted on the dipole tube via a support assembly. Feeder lines extending from the feed network connect the dipoles, and a base supporting the dipole tubes is disposed at the bottom end of the dipole tube. This L-band multi-element antenna is compact and lightweight, while maintaining high radiation performance in the horizontal plane and exhibiting high horizontal gain.

[0050] The above descriptions are merely 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 description and drawings, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. An L-band multi-element antenna, characterized in that: The invention comprises a vibrator tube, a feeding network is arranged in the vibrator tube, a plurality of vibrators arranged vertically in sequence are arranged on the vibrator tube via a supporting assembly, a feeding line for connecting the vibrators is extended from the feeding network, and a base for supporting the vibrator tube is provided at the bottom end of the vibrator tube; The vibrator includes a first vibrator, a second vibrator and a third vibrator, wherein the first vibrator and the second vibrator form a vibrator unit, and the first vibrator is located below the second vibrator. A plurality of vibrator units are arranged at equal intervals from bottom to top on the vibrator tube, and the third vibrator is arranged between adjacent vibrator units. The third vibrator is an isolation vibrator. The vibrator units are provided with four, a feeding hole is opened on the first vibrator, the feeding network is a one-to-four power splitter, four feeding wires extend from the four feeding holes, and the feeding wires pass through the feeding holes to connect to the second vibrator, wherein the outer shell of the feeding wire is electrically connected to the first vibrator, and the inner core of the feeding wire is electrically connected to the second vibrator; The feed lines in adjacent vibrator units are arranged in a staggered direction with a staggered angle of 90 degrees. In a top view, the four feed lines are connected to the vibrator units at four points of a circle, and the four points bisect the circle.

2. The L-band multi-element antenna according to claim 1, wherein: The first vibrator, the second vibrator and the third vibrator are each provided with a first opening and a second opening which are connected up and down. The diameter of the first opening is smaller than that of the second opening. The vibrator tube passes through the first opening and the second opening to connect the vibrators.

3. The L-band multi-element antenna according to claim 2, wherein: The base is provided with a first flange and a second flange, the first flange is adapted to the vibrator tube, the vibrator tube can be inserted into the first flange and fixed, the first flange is provided with a through hole for connecting the feed connector, the second flange has an upwardly extending vertical plate, the vertical plate is provided with a through hole for fixing the feed connector, and the feed network is electrically connected to the feed connector by a connecting wire passing through the through hole.

4. The L-band multi-element antenna according to claim 3, characterized in that: The support assembly includes a positioning card, a first supporting plate adapted thereto is provided on the positioning card, the first vibrator is provided on the first supporting plate, a metal ring is provided on the first opening of the first vibrator, a metal tube is provided on the metal ring, the second vibrator is sleeved on the outside of the metal tube, a second supporting plate is provided above the metal tube, and a positioning sleeve for fixing and positioning the third vibrator is provided on the second supporting plate.

5. The L-band multi-element antenna according to claim 4, characterized in that: The vibrator tube is further provided with a support ring for supporting the inner wall of the second vibrator.

6. The L-band multi-element antenna according to claim 5, characterized in that: The vibrator tube is provided with an opening for the feeder to extend out.

Images