Feed source assembly and parabolic antenna

Abstract

The utility model provides a feed source assembly and a parabolic antenna, and the feed source assembly comprises a housing which is provided with an accommodation cavity; the reflecting plate is arranged on the shell and is accommodated in the accommodating cavity; the vibrator is arranged on the reflecting plate and is accommodated in the accommodating cavity; the supporting tube is arranged on the shell, the supporting tube and the vibrator are distributed at intervals, the supporting tube is provided with a wire passing channel communicated with the containing cavity, and the wire passing channel is used for a coaxial cable to penetrate through so that the two ends of the coaxial cable can be connected with the vibrator and the signal source respectively; the connecting disc is arranged at one end, far away from the shell, of the supporting pipe, and the connecting disc is used for being connected with a supporting frame of the parabolic antenna; and the coaxial cable penetrates through the wire passing channel and is connected with the vibrator, and the coaxial cable is used for being connected with a signal source. Signals of the feed source assembly are transmitted through a coaxial cable instead of a circular waveguide, so that the diameter of the supporting tube is smaller than that of the circular waveguide. Moreover, the diameter of the supporting tube is far smaller than the diameter of a circular waveguide which has the same frequency and is used for transmitting microwave signals, so that the size of the feed source assembly is greatly reduced, the loss of electrical performance can be reduced, and the weight of the parabolic antenna is reduced.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a feed assembly and a parabolic antenna. Background Technology

[0002] Parabolic antennas, as a highly efficient and directional antenna type, have played a crucial role in the field of wireless communication since their inception. From early radar systems to today's satellite communications and microwave relay communications, parabolic antennas, with their unique advantages, have become a bridge connecting the world. As microwave products decrease in frequency, their size typically increases. Conventional parabolic antennas use a waveguide-fronted horn as their feed source; however, larger sizes lead to increased obstruction, resulting in losses and a decrease in electrical performance.

[0003] In related technologies, to reduce the size of the feed, a sputter plate feed is used instead of a waveguide-fronted horn feed, in which the dielectric sputter plate is connected to the circular waveguide. However, as the frequency continues to decrease, the circular waveguide transmitting the signal in the feed needs to have a larger diameter due to the cutoff frequency limitation, and the size of the sputter plate feed will also be larger, thereby increasing the obstruction area of ​​the sub-reflector, resulting in greater loss of electrical performance and an increase in the weight of the antenna. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a feed assembly and a parabolic antenna, which aims to solve the problem of large size of the splash plate feed in related technologies.

[0005] To solve the above-mentioned technical problems, the first aspect of this utility model provides a feed assembly, comprising:

[0006] The outer casing has a receiving cavity;

[0007] A reflector is disposed on the outer casing and housed within the receiving cavity;

[0008] The oscillator is disposed on the reflector and housed within the receiving cavity;

[0009] A support tube is disposed on the outer shell and spaced apart from the vibrator, and the support tube is provided with a wire passage communicating with the receiving cavity;

[0010] A connecting plate, disposed at the end of the support tube away from the outer casing, is used to connect to the support frame of the parabolic antenna; and,

[0011] A coaxial cable is threaded through the cable passage and connected to the vibrator, with the end of the coaxial cable away from the vibrator used to connect to a signal source.

[0012] Optionally, the outer casing is provided with a mounting cavity communicating with the receiving cavity, and one end of the support tube is fitted into the mounting cavity;

[0013] The feed assembly also includes a locking element, which is fitted onto the housing and connected to the support tube.

[0014] Optionally, the outer side of the support tube is provided with a plurality of annular mounting grooves, the plurality of mounting grooves being spaced apart along the length direction of the support tube, and the locking member being assembled in one of the mounting grooves.

[0015] Optionally, the oscillator includes an insulating pad and a radiating arm, with one end of the insulating pad fixed to the reflector and the other end connected to the radiating arm.

[0016] Optionally, the insulating pad is provided with a first positioning part and a second positioning part, and the reflector is provided with a first positioning hole and a second positioning hole, wherein the first positioning part and the second positioning part are respectively assembled in the first positioning hole and the second positioning hole.

[0017] Optionally, the second positioning part is disposed on the side edge of the insulating pad, and the second positioning part is provided with a first wire passage hole.

[0018] Optionally, the reflector is further provided with a second wire-passing hole, and the second wire-passing hole and the first wire-passing hole are distributed at intervals.

[0019] Optionally, the outer shell includes a bottom shell and a top cover. The bottom shell is provided with the receiving cavity. The support tube is connected to the bottom shell. The top cover is disposed at one end of the bottom shell away from the support tube and covers the receiving cavity. The top cover is sleeved on the outside of the bottom shell.

[0020] The inner wall of the bottom shell is provided with a first support platform, the inner wall of the top cover is provided with a second support platform, and the opposite sides of the reflector plate abut against the first support platform and the second support platform, respectively.

[0021] Optionally, the reflector is provided with a limiting hole, and the bottom shell is provided with a limiting part, which is assembled in the limiting hole.

[0022] The second aspect of this utility model provides a parabolic antenna, comprising:

[0023] The reflector has a parabolic surface;

[0024] A support frame is disposed on the reflector; and,

[0025] As described in any of the above feed assemblies, the connecting plate is connected to the support frame, and the oscillator is located at the focal point of the parabola.

[0026] Compared with related technologies, the feed assembly and parabolic antenna of this invention have the following advantages: By designing a coaxial cable that passes through the support tube and connects to the vibrator, the signal of the feed assembly is transmitted through the coaxial cable instead of the circular waveguide, thus making the diameter of the support tube smaller than that of the circular waveguide. Moreover, the diameter of the support tube is entirely determined by the thickness of the coaxial cable. Since the power of the signal transmitted by a typical repeater antenna is low, the coaxial cable is thinner, and the corresponding diameter of the support tube can also be smaller. This makes the diameter of the support tube much smaller than the diameter of the circular waveguide used to transmit microwave signals at the same frequency, thereby greatly reducing the size of the feed assembly, reducing the obstruction area of ​​the sub-reflector, reducing the loss of electrical performance, and reducing the weight of the parabolic antenna. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the parabolic antenna provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the feed assembly provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the support tube provided in an embodiment of this utility model;

[0031] Figure 4 This is an assembly diagram of the reflector and vibrator provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the oscillator from one view according to an embodiment of the present utility model;

[0033] Figure 6 This is a schematic diagram of another view of the oscillator provided in an embodiment of this utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the reflector provided in an embodiment of the present invention;

[0035] Figure 8 This is a cross-sectional view of the reflector and the outer shell after assembly, as provided in this embodiment of the utility model.

[0036] In the accompanying drawings, the reference numerals represent: 1. Outer shell; 11. Bottom shell; 111. Receiving cavity; 112. Mounting cavity; 113. First support platform; 114. Locking hole; 12. Top cover; 121. Second support platform; 2. Reflector; 21. First positioning hole; 22. Second positioning hole; 23. Second wire passage hole; 24. Limiting hole; 25. Second mounting hole; 3. Vibrator; 31. Insulating pad; 311. First positioning part; 312. Second positioning part; 3121. First wire passage hole; 313. First mounting hole; 32. Radiation arm; 321. Reserved hole; 33. Connecting piece; 4. Support tube; 41. Wire passage channel; 42. Mounting groove; 5. Connecting plate; 6. Reflector; 7. Support frame; 8. Feed assembly. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0040] Example:

[0041] Please see Figure 1This utility model provides a parabolic antenna, including a reflector 6, a support frame 7, and a feed assembly 8. The reflector 6 has a parabolic surface, the support frame 7 is disposed on the reflector 6, and the feed assembly 8 is connected to the support frame 7. The signal from the signal source is input to the parabolic antenna through the feed assembly 8, and the signal radiated by the feed assembly 8 is reflected outward by the parabolic surface of the reflector 6 to radiate a highly directional signal.

[0042] Please see Figures 1 to 8 The feed assembly 8 includes a housing 1, a reflector 2, an element 3, a support tube 4, a connecting plate 5, and a coaxial cable (not shown in the figure). The housing 1 has a receiving cavity 111. The reflector 2 is disposed in the housing 1 and housed in the receiving cavity 111. The element 3 is disposed in the reflector 2 and housed in the receiving cavity 111. The support tube 4 is disposed in the housing 1 and spaced apart from the element 3. The support tube 4 has a wire passage 41 communicating with the receiving cavity 111. The connecting plate 5 is disposed at the end of the support tube 4 away from the housing 1. The connecting plate 5 is used to connect to the support frame 7 of the parabolic antenna. The coaxial cable passes through the wire passage 41 and is connected to the element 3. The end of the coaxial cable away from the element is used to connect to the signal source.

[0043] By designing a coaxial cable that passes through the cable channel 41 of the support tube 4 and connects to the vibrator 3, the signal of the feed assembly 8 is transmitted through the coaxial cable instead of the circular waveguide. This makes the diameter of the support tube 4 smaller than that of the circular waveguide. Moreover, the diameter of the support tube 4 is entirely determined by the thickness of the coaxial cable. Since the power of the signal transmitted by a typical repeater antenna is low, the coaxial cable is thinner, and the corresponding diameter of the support tube 4 can be smaller. This makes the diameter of the support tube 4 much smaller than the diameter of the circular waveguide used to transmit microwave signals at the same frequency, thereby greatly reducing the size of the feed assembly 8, reducing the obstruction area of ​​the sub-reflector, reducing the loss of electrical performance, and reducing the weight of the parabolic antenna.

[0044] It should be noted that the signal transmission in the sputter plate feed in the related technology uses a circular waveguide. The circular waveguide uses conventional electromagnetic waves to transmit signals, resulting in a relatively large diameter.

[0045] Please see Figure 2 and Figure 8 The outer shell 1 is provided with an installation cavity 112 that communicates with the receiving cavity 111, and one end of the support tube 4 is installed in the installation cavity 112; the feed assembly 8 also includes a locking member, which is installed on the outer shell 1 and connected to the support tube 4. The locking member can lock and fix the support tube 4 on the outer shell 1, thereby achieving mutual fixation between the outer shell 1 and the support tube 4.

[0046] According to actual needs, the mounting cavity 112 is adapted to the support tube 4. The locking element can be a screw, which is threaded to the outer shell 1, and the screw abuts and fixes the support tube 4 against the inner wall of the mounting cavity 112.

[0047] To ensure that the oscillator 3 is located at the focal point of the parabola, the effective length of the support tube 4 is designed to be adjustable to change the overall length of the feed assembly 8, thereby changing the position of the oscillator 3 within the parabola.

[0048] For example:

[0049] Please see Figure 2 , Figure 3 and Figure 8 In some embodiments, the outer side of the support tube 4 is provided with a plurality of annular mounting grooves 42, which are spaced apart along the length of the support tube 4. A locking member is assembled in one mounting groove 42. Wherein, the length of the support tube 4 extending into the mounting cavity 112 is different when the locking member is assembled in different mounting grooves 42, and the support tube 4 can be equivalent to being extended or shortened, thereby adjusting the effective length of the support tube 4.

[0050] It should be noted that the number of mounting slots 42 is set according to actual needs, such as two, three, or four. To improve the connection between the support tube 4 and the outer casing 1, multiple locking components can be provided, for example, two, three, or four locking components can be provided. The outer casing 1 is also provided with locking holes 114, and the locking components are assembled in the locking holes 114.

[0051] Please see Figure 4 , Figure 5 and Figure 7 The vibrator 3 includes an insulating pad 31 and a radiating arm 32. One end of the insulating pad 31 is fixed to the reflector 2, and the other end is connected to the radiating arm 32. The insulating pad 31 and the reflector 2 are fixed by screws. Specifically, the insulating pad 31 is provided with a first mounting hole 313, and the reflector 2 is also provided with a second mounting hole 25. The screw is assembled into the second mounting hole 25 and threadedly connected to the first mounting hole 313, thereby locking the insulating pad 31 onto the reflector 2.

[0052] According to actual needs, such as Figure 5 and Figure 6 As shown, there can be four radiating arms 32, and the four radiating arms 32 are arranged symmetrically at the center. The oscillator 3 also includes a connecting piece 33, which is made of metal and is connected to two diagonally distributed radiating arms 32 via coaxial cables.

[0053] Please see Figure 4 , Figure 5 and Figure 7 The insulating pad 31 is provided with a first positioning part 311 and a second positioning part 312, and the reflector 2 is provided with a first positioning hole 21 and a second positioning hole 22. The first positioning part 311 and the second positioning part 312 are respectively installed in the first positioning hole 21 and the second positioning hole 22, which can enable the vibrator 3 and the reflector 2 to be assembled quickly and accurately.

[0054] According to actual needs, there can be two first positioning parts 311 and two second positioning parts 312, and two first positioning holes 21 and two second positioning holes 22. The two first positioning parts 311 are assembled in the two first positioning holes 21 in a one-to-one correspondence, and the two second positioning parts 312 are assembled in the two second positioning holes 22 in a one-to-one correspondence.

[0055] Please see Figure 4 , Figure 5 and Figure 7 The second positioning part 312 is located on one side of the vibrator 3, and the second positioning part 312 is provided with a first wire hole 3121. The first wire hole 3121 can be used for coaxial cable to pass through, thereby facilitating the arrangement of coaxial cable on the vibrator 3.

[0056] Please see Figure 4 , Figure 5 and Figure 7 The reflector 2 is also provided with a second wire passage hole 23, which is distributed at intervals with the first wire passage hole 3121. After the coaxial cable enters the receiving cavity 111 and passes through the second wire passage hole 23, the coaxial cable is bent 180° and passes through the first wire passage hole 3121 again into the reserved hole 321 of the vibrator 3. The outer conductor of the coaxial cable is fixed to the left half of the vibrator 3 by welding, and the inner conductor continues to pass through the reserved hole 321 and extends out, and is fixed to the right half of the vibrator 3 by welding through the connecting piece 33.

[0057] According to actual needs, there are two second wire passage holes 23, two first wire passage holes 3121 are located between the two second wire passage holes 23, and two reserved holes 321 are provided. The two first wire passage holes 3121 are coaxially arranged in a one-to-one correspondence with the two reserved holes 321.

[0058] Please see Figure 2 and Figure 8 The outer shell 1 includes a bottom shell 11 and an upper cover 12. The bottom shell 11 has a receiving cavity 111. The support tube 4 is connected to the bottom shell 11. The upper cover 12 is located at the end of the bottom shell 11 away from the support tube 4 and covers the receiving cavity 111. The upper cover 12 is sleeved on the outside of the bottom shell 11. The inner wall of the bottom shell 11 has a first support platform 113, and the inner wall of the upper cover 12 has a second support platform 121. The opposite sides of the reflector 2 abut against the first support platform 113 and the second support platform 121 respectively, thereby clamping and fixing the reflector 2.

[0059] Depending on actual needs, the bottom shell 11 and the top cover 12 can be made of plastic, such as ABS material, which will not interfere with signal transmission and can also protect the vibrator 3 from environmental influences. The reflector 2 can be a circular aluminum plate, and the diameter of the reflector 2 is the same as the inner diameter of the bottom shell 11.

[0060] Please see Figure 2 , Figure 7 and Figure 8 The reflector 2 is provided with a limiting hole 24, and the bottom shell 11 is provided with a limiting part. The limiting part is assembled in the limiting hole 24. The limiting part and the limiting hole 24 cooperate with each other to prevent the reflector 2 from rotating in the circumferential direction and to achieve precise positioning of the bottom shell 11 and the reflector 2. According to actual needs, the limiting hole 24 can be set on the side edge of the reflector 2, that is, the limiting hole 24 forms a notch on the reflector 2.

[0061] Please see Figure 1 and Figure 2 In some embodiments, the connecting disk 5 is an insulating disk with a through cavity. The end of the support tube 4 away from the outer shell 1 is fitted into the through cavity. The support tube 4 extends out of the connecting disk 5, and sealant is filled between the connecting disk 5 and the support tube 4.

[0062] Please see Figure 1 In some embodiments, the parabolic surface of the reflector 6 is provided with a plurality of small holes arranged in an array, which can reduce the weight of the reflector 6 and reduce wind resistance.

[0063] The structure of a parabolic antenna will be illustrated below with an example.

[0064] An external signal source inputs a signal to the parabolic antenna through the N-type connector of a coaxial cable. The coaxial cable transmits the signal to element 3. Because the outer conductor of the coaxial cable is connected to the left half of element 3 and the inner conductor is connected to the right half of element 3, element 3 radiates the signal downwards. After reflection by the parabolic surface, the signal is finally radiated outwards as a highly directional signal. The two coaxial cables correspond to ±45° polarization signals respectively, therefore this antenna is a dual-polarized antenna.

[0065] In this example, the parabolic antenna has a diameter of 1.2 meters, an operating frequency band of 1.695–2.69 GHz, a standing wave ratio of <1.5, and a gain of ≥25 dB at low frequencies of 1.695 GHz and ≥28 dB at 2.69 GHz, which meets the antenna's specifications.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A feed assembly, characterized in that, include: The outer casing has a receiving cavity; A reflector is disposed on the outer casing and housed within the receiving cavity; The oscillator is disposed on the reflector and housed within the receiving cavity; A support tube is disposed on the outer shell and spaced apart from the vibrator, and the support tube is provided with a wire passage communicating with the receiving cavity; A connecting plate, disposed at the end of the support tube away from the outer casing, is used to connect to the support frame of the parabolic antenna; and, A coaxial cable is threaded through the cable passage and connected to the vibrator, with the end of the coaxial cable away from the vibrator used to connect to a signal source.

2. The feed assembly according to claim 1, characterized in that, The outer shell is provided with a mounting cavity communicating with the receiving cavity, and one end of the support tube is assembled in the mounting cavity; The feed assembly also includes a locking element, which is fitted onto the housing and connected to the support tube.

3. The feed assembly according to claim 2, characterized in that, The outer side of the support tube is provided with a plurality of annular mounting grooves, which are spaced apart along the length of the support tube, and the locking member is assembled in one of the mounting grooves.

4. The feed assembly according to claim 1, characterized in that, The oscillator includes an insulating pad and a radiating arm, with one end of the insulating pad fixed to the reflector and the other end connected to the radiating arm.

5. The feed assembly according to claim 4, characterized in that, The insulating pad is provided with a first positioning part and a second positioning part, and the reflector is provided with a first positioning hole and a second positioning hole. The first positioning part and the second positioning part are respectively assembled in the first positioning hole and the second positioning hole.

6. The feed assembly according to claim 5, characterized in that, The second positioning part is located on the side edge of the insulating pad, and the second positioning part is provided with a first wire passage hole.

7. The feed assembly according to claim 6, characterized in that, The reflector is also provided with a second wire passage hole, which is distributed at intervals with the first wire passage hole.

8. The feed assembly according to claim 1, characterized in that, The outer shell includes a bottom shell and a top cover. The bottom shell is provided with the receiving cavity. The support tube is connected to the bottom shell. The top cover is disposed at the end of the bottom shell away from the support tube and covers the receiving cavity. The top cover is sleeved on the outside of the bottom shell. The inner wall of the bottom shell is provided with a first support platform, the inner wall of the top cover is provided with a second support platform, and the opposite sides of the reflector plate abut against the first support platform and the second support platform, respectively.

9. The feed assembly according to claim 8, characterized in that, The reflector is provided with a limiting hole, and the bottom shell is provided with a limiting part, which is assembled in the limiting hole.

10. A parabolic antenna, characterized in that, include: The reflector has a parabolic surface; A support frame is provided on the reflector; as well as, The feed assembly as described in any one of claims 1-9, wherein the connecting plate is connected to the support frame, and the oscillator is located at the focal point of the parabola.

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