A bias-fed microwave antenna

Abstract

The application belongs to the technical field of antennas, and particularly relates to a bias-fed microwave antenna, which comprises a base, a pot surface antenna is arranged on the top of the base in an inclined mode, a supporting plate is arranged between the rear side of the pot surface antenna and the base, the bottom of the supporting plate is hinged to the base, a connecting column is fixedly connected to the position close to the top on the front side of the supporting plate, the connecting column is vertically rotatably connected to the rear side of the pot surface antenna, and the rear side of the supporting plate is hingedly connected to the base in an inclined mode. In the process of use, when an object hits the high-frequency head, the fixing device can convert part of the impact force of the object on the high-frequency head into the internal energy of the buffer device, so that the high-frequency head is prevented from being damaged due to the impact, and after the object is separated from the high-frequency head, the buffer device can automatically restore the high-frequency head to the original position through the fixing device, so that the normal signal receiving of the high-frequency head is not affected.

Description

Technical Field

[0001] This invention belongs to the field of antenna technology, and specifically relates to an offset-fed microwave antenna. Background Technology

[0002] An offset-fed antenna, as opposed to a prime-fed antenna, refers to an antenna where the feed and LNB are not mounted on a straight line perpendicular to the antenna's center plane and passing through the antenna's center. Therefore, there is no feed shadow effect. Given the same antenna area, manufacturing precision, and receiving frequency, an offset-fed antenna has a higher gain than a prime-fed antenna. However, both prime-fed and offset-fed antennas are cross-sections of a paraboloid of revolution; only the location of the cross-section differs.

[0003] Existing offset antennas mainly consist of a support frame, a dish antenna, a low-noise block downconverter (LNB), and a mounting rod for securing the LNB. In use, offset antennas are typically installed outdoors (especially in harsh environments), and their tops are generally not equipped with protective devices. Furthermore, because the mounting rod for securing the LNB is fixed to the support frame, if an object strikes the LNB, the rod may bend due to the impact, causing the LNB to shift and affecting the normal operation of the offset antenna.

[0004] Therefore, it is necessary to invent an offset microwave antenna to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an offset-fed microwave antenna to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An offset-fed microwave antenna includes a base, a dish antenna obliquely mounted on the top of the base, a support plate between the rear side of the dish antenna and the base, the bottom of the support plate being hinged to the base, a connecting column fixedly connected to the front side of the support plate near the top, and the connecting column being rotatably connected to the rear side of the dish antenna, a first telescopic rod obliquely hinged between the rear side of the support plate and the base, a fixing bolt threaded onto the first telescopic rod for locking the length of the first telescopic rod, a LNB (low frequency head) mounted on the front side of the dish antenna, a fixing device fitted onto the LNB, and a buffer device for protecting the fixing device at the bottom of the dish antenna.

[0008] Furthermore, the fixing device includes a fixing ring, in which the LNB is detachably inserted. Two arc-shaped grooves are symmetrically formed on the surface of the fixing ring, and a slider is slidably installed in the arc-shaped groove. An arc-shaped limiting rod is inserted through the slider along the circumference of the fixing ring. The two ends of the limiting rod are respectively fixedly and perpendicularly connected to the groove wall on the corresponding side of the arc-shaped groove. A first spring is sleeved on the part of the two limiting rods located on the side away from the two sliders. A support rod is fixedly connected to the side of the slider away from the fixing ring, and a locking block is fixedly connected to the end of the support rod away from the slider. The locking block is slidably installed at the edge of the dish antenna.

[0009] Furthermore, the buffer device includes an arc-shaped sleeve, with arc-shaped movable rods slidably inserted at both ends of the sleeve. The ends of the two movable rods located outside the sleeve are respectively fixedly connected to two locking blocks. A second spring is fixedly connected between the opposite ends of the two movable rods. A ring is rotatably sleeved in the middle of the sleeve, and a pull rod is hinged to the bottom of the ring. A counterweight ball is fixedly connected to the bottom of the pull rod.

[0010] Furthermore, the rear side of the dish antenna has multiple strip plates distributed in a ring. The strip plates are vertically and fixedly connected to the rear side of the dish antenna. The front side of the dish antenna has an arc-shaped scraper. The scraper is fixedly connected to one of the locking blocks and is in contact with the front side of the dish antenna.

[0011] Furthermore, an annular protrusion is fixedly connected to the rear side of the dish antenna, and the center of the annular protrusion and the center of the dish antenna are on the same straight line. A movable block is slidably installed on the annular protrusion, and two second telescopic rods are hinged between the movable block and the front side of the support plate, and a third spring is sleeved on the second telescopic rod.

[0012] Furthermore, the fixing ring is located at the center of the dish antenna, and a transparent protective plate is fixedly connected to the top of the fixing ring. The protective plate is arc-shaped and parallel to the length direction of the fixing ring.

[0013] Furthermore, the scraper and the support rod on the corresponding card block are located in the same plane, and the end of the scraper away from the card block is located at the center of the dish antenna.

[0014] Furthermore, the tension of the second spring on the two movable rods is greater than the weight of the high-frequency head, and the stretching ratio of the second spring is the same as the compression ratio of the first spring.

[0015] Furthermore, the weight of the counterweight ball is greater than the frictional force between the sleeve and the two movable rods, and the counterweight ball does not contact the strip plate.

[0016] The technical effects and advantages of this invention are as follows:

[0017] 1. During use, when an object hits the LNB, the fixing device can convert part of the impact force of the object on the LNB into the internal energy of the buffer device, thereby preventing the LNB from being damaged by the impact. And when the object separates from the LNB, the buffer device can automatically restore the LNB to its original position through the fixing device, so as not to affect the normal signal reception of the LNB.

[0018] 2. By setting a strip plate on the back of the dish antenna, when the wind blows vertically on the strip plate, the thrust of the wind on the strip plate can drive the dish antenna to rotate around the connecting column as an axis. As the dish antenna rotates, the two locking blocks can slide relative to the dish antenna under the combined action of the pressure of the LNB on the support rod and the pulling force of the counterweight ball on the two movable rods through the sleeve. This allows the scraper to scrape against the front of the dish antenna, thereby removing the dust attached to the dish antenna and ensuring the signal reflection effect of the dish antenna.

[0019] 3. During the use of the dish antenna, when an object falls directly onto it, the dish antenna will deform downwards with the connecting post as the support point due to the impact. As the dish antenna deforms, the two second telescopic rods and the third spring can contract, thereby converting the impact force of the object on the dish antenna into the elastic potential energy of the third spring, thus reducing the impact of the object on the dish antenna. In addition, due to the presence of the second telescopic rods and the third spring, when an object falls directly onto the dish antenna, the third spring can also protect the connection point between the connecting post and the dish antenna through the support of the movable block, preventing the connection point from being damaged due to impact.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a first three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0024] Figure 3 In this invention Figure 2 Enlarged view of part A;

[0025] Figure 4 This is a three-dimensional structural diagram of the fixing device and the buffer device in this invention;

[0026] Figure 5 In this invention Figure 4 Enlarged view of part B;

[0027] Figure 6 This is a three-dimensional structural diagram of the fixing ring, limiting rod, slider, first spring, and protective plate in this invention.

[0028] In the diagram: 1. Base; 2. Dish antenna; 3. Support plate; 4. Connecting column; 5. First telescopic rod; 6. Fixing bolt; 7. LNB; 8. Fixing device; 81. Fixing ring; 82. Slider; 83. Limiting rod; 84. First spring; 85. Support rod; 86. Locking block; 9. Buffer device; 91. Sleeve; 92. Movable rod; 93. Second spring; 94. Pull rod; 95. Counterweight ball; 10. Strip plate; 11. Scraper; 12. Annular protrusion; 13. Movable block; 14. Second telescopic rod; 15. Third spring; 16. Protective plate. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This invention provides, for example Figures 1-6 An offset-fed microwave antenna is shown, including a base 1. A dish antenna 2 is obliquely mounted on the top of the base 1. A support plate 3 is provided between the rear side of the dish antenna 2 and the base 1. The bottom of the support plate 3 is hinged to the base 1. A connecting column 4 is fixedly connected to the front side of the support plate 3 near the top, and the connecting column 4 is rotatably connected to the rear side of the dish antenna 2. A first telescopic rod 5 is obliquely hinged between the rear side of the support plate 3 and the base 1. A fixing bolt 6 for locking the length of the first telescopic rod 5 is threaded into the first telescopic rod 5. A high-frequency head 7 is provided on the front side of the dish antenna 2. A fixing device 8 is sleeved on the high-frequency head 7. A buffer device 9 for protecting the fixing device 8 is provided at the bottom of the dish antenna 2.

[0031] When in use, first loosen the fixing bolt 6 on the first telescopic rod 5, then adjust the angle between the support plate 3 and the ground to adjust the angle at which the LNB 7 receives the signal, and finally tighten the fixing bolt 6.

[0032] During use, when an object hits the LNB 7, the fixing device 8 can convert part of the impact force of the object on the LNB 7 into the internal energy of the buffer device 9, thereby preventing the LNB 7 from being damaged by the impact. After the object separates from the LNB 7, the buffer device 9 can automatically restore the LNB 7 to its original position through the fixing device 8, so as not to affect the normal signal reception of the LNB 7.

[0033] like Figures 1-5 As shown, the fixing device 8 includes a fixing ring 81, and the high-frequency head 7 is detachably inserted into the fixing ring 81. Two arc-shaped grooves are symmetrically opened on the surface of the fixing ring 81. A slider 82 is slidably installed in the arc-shaped groove. An arc-shaped limiting rod 83 is inserted through the slider 82 along the circumference of the fixing ring 81. The two ends of the limiting rod 83 are respectively perpendicularly fixed to the groove wall on the corresponding side of the arc-shaped groove. The portions of the two limiting rods 83 located on the opposite side of the two sliders 82 are each sleeved with a first spring 84. A support rod 85 is fixedly connected to the side of the slider 82 away from the fixing ring 81. A locking block 86 is fixedly connected to the end of the support rod 85 away from the slider 82. The locking block 86 is slidably installed at the edge of the dish antenna 2. The fixing ring 81 is located at the center of the dish antenna 2, and a transparent protective plate 16 is fixedly connected to the top of the fixing ring 81. The protective plate 16 is arc-shaped and parallel to the length direction of the fixing ring 81.

[0034] The buffer device 9 includes an arc-shaped sleeve 91, with arc-shaped movable rods 92 slidably inserted at both ends of the sleeve 91. The ends of the two movable rods 92 located outside the sleeve 91 are respectively fixedly connected to two locking blocks 86. A second spring 93 is fixedly connected between the opposite ends of the two movable rods 92. A ring is rotatably sleeved in the middle of the sleeve 91. A pull rod 94 is hinged to the bottom of the ring. A counterweight ball 95 is fixedly connected to the bottom of the pull rod 94. The pulling force of the second spring 93 on the two movable rods 92 is greater than the weight of the high-frequency head 7, and the stretching ratio of the second spring 93 is the same as the compression ratio of the first spring 84. The weight of the counterweight ball 95 is greater than the frictional force between the sleeve 91 and the two movable rods 92, and the counterweight ball 95 does not contact the strip plate 10.

[0035] Under normal conditions, the LNB 7 can be located at the center of the dish antenna 2 with the support of the two support rods 85, while the sleeve 91 can be located at the center of symmetry of the dish antenna 2 with the pull of the counterweight ball 95.

[0036] When an object strikes the protective plate 16 on top of the LNB 7, the protective plate 16 first protects the LNB 7. In addition, the impact of the object causes the fixed ring 81 and the LNB 7 to move downward together. As the LNB 7 moves downward, the two support rods 85 can deflect away from each other about the fixed ring 81. At the same time, as the two support rods 85 deflect, the two locking blocks 86 can slide upward along the edge of the dish antenna 2 under the push of the two support rods 85. During this process, the two first springs 84 located in the two arc-shaped grooves begin to contract due to the compression of the support rods 85, while the two second springs 93 begin to extend due to the pull of the two movable rods 92. This converts the impact force of the object on the protective plate 16 into the elastic potential energy of the first springs 84 and the second springs 93, thereby preventing the LNB 7 from being damaged by the impact of the object.

[0037] Furthermore, compared to existing fixed rods, the two movable support rods 85 can deflect in opposite directions when an object impacts the LNB 7, thus preventing the support rods 85 from breaking due to the impact. After the object separates from the support plate 3, the two support rods 85 can deflect in opposite directions with the fixed ring 81 as the axis under the combined action of the two first springs 84 and the two second springs 93. The LNB 7 can then return to its initial position under the pushing action of the two support rods 85, thus ensuring that the LNB 7 can receive signals normally.

[0038] like Figure 1 and Figure 2 As shown, multiple strip plates 10 are distributed in a ring on the rear side of the dish antenna 2. The strip plates 10 are vertically fixed to the rear side of the dish antenna 2. An arc-shaped scraper 11 is provided on the front side of the dish antenna 2. The scraper 11 is fixedly connected to one of the locking blocks 86, and the scraper 11 is in contact with the front side of the dish antenna 2. The scraper 11 and the support rod 85 on the corresponding locking block 86 are located in the same plane, and the end of the scraper 11 away from the locking block 86 is located at the center of the dish antenna 2.

[0039] Since the dish antenna 2 is used outdoors, when there is a lot of dust in the outside world, dirt can easily adhere to the dish antenna 2, thereby affecting the signal reflection effect of the dish antenna 2, and in turn affecting the signal reception quality of the LNB 7. By setting a strip plate 10 on the rear side of the dish antenna 2, when the wind blows vertically on the strip plate 10, the pushing force of the wind on the strip plate 10 can drive the dish antenna 2 to rotate around the connecting column 4. As the dish antenna 2 rotates, the two locking blocks 86 can slide relative to the dish antenna 2 under the combined action of the pressure of the LNB 7 on the support rod 85 and the pulling force of the counterweight ball 95 on the two movable rods 92 through the sleeve 91. This allows the scraper 11 to scrape against the front side of the dish antenna 2, thereby removing the dust attached to the dish antenna 2 and ensuring the signal reflection effect of the dish antenna 2.

[0040] Furthermore, since the scraper 11 and the support rod 85 on the corresponding card block 86 are located in the same plane, during daily use, the part of the scraper 11 that blocks the dish antenna 2 overlaps with the part of the support block that blocks the dish antenna 2, thereby avoiding an increase in the blocking area of ​​the dish antenna 2 due to the presence of the scraper 11.

[0041] like Figure 2 and Figure 3 As shown, an annular protrusion 12 is fixedly connected to the rear side of the dish antenna 2, and the center of the annular protrusion 12 and the center of the ball of the dish antenna 2 are on the same straight line. A movable block 13 is slidably installed on the annular protrusion 12. Two second telescopic rods 14 are hinged between the movable block 13 and the front side of the support plate 3, and a third spring 15 is sleeved on the second telescopic rod 14.

[0042] During the use of the dish antenna 2, when an object falls directly onto the dish antenna 2, the dish antenna 2 will deform downwards with the connecting column 4 as the support point due to the impact of the object. As the dish antenna 2 deforms, the two second telescopic rods 14 and the third spring 15 can retract, thereby converting the impact force of the object on the dish antenna 2 into the elastic potential energy of the third spring 15, thereby reducing the impact of the object on the dish antenna 2.

[0043] In addition, due to the presence of the second telescopic rod 14 and the third spring 15, when an object falls directly onto the dish antenna 2, the third spring 15 can also protect the connection point between the connecting post 4 and the dish antenna 2 through the support of the movable block 13, thus preventing the connection point between the connecting post 4 and the dish antenna 2 from being damaged by impact.

[0044] At the same time, the third spring 15, through the support of the movable block 13, can also improve the stability of the connection between the dish antenna 2 and the connecting post 4, and ensure the smoothness of the dish antenna 2 when it rotates under wind.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An offset-fed microwave antenna, comprising a base (1), characterized in that: A dish antenna (2) is inclinedly arranged on the top of the base (1). A support plate (3) is arranged between the rear side of the dish antenna (2) and the base (1). The bottom of the support plate (3) is hinged to the base (1). A connecting column (4) is fixedly connected to the front side of the support plate (3) near the top. The connecting column (4) is vertically rotatably connected to the rear side of the dish antenna (2). A first telescopic rod (5) is inclinedly hinged between the rear side of the support plate (3) and the base (1). A fixing bolt (6) for locking the length of the first telescopic rod (5) is threaded into the first telescopic rod (5). A high-frequency head (7) is arranged on the front side of the dish antenna (2). A fixing device (8) is sleeved on the high-frequency head (7). A buffer device (9) for protecting the fixing device (8) is provided at the bottom of the dish antenna (2). The fixing device (8) includes a fixing ring (81), and the high frequency head (7) is detachably inserted into the fixing ring (81). The surface of the fixing ring (81) has two symmetrical arc grooves. A slider (82) is slidably installed in the arc groove. An arc-shaped limiting rod (83) is inserted through the slider (82) along the circumferential direction of the fixing ring (81). The two ends of the limiting rod (83) are respectively vertically fixedly connected to the groove wall on the corresponding side of the arc groove. The two limiting rods (83) located on the side away from the two sliders (82) are each sleeved with a first spring (84). A support rod (85) is fixedly connected to the side of the slider (82) away from the fixing ring (81). A locking block (86) is fixedly connected to the end of the support rod (85) away from the slider (82). The locking block (86) is slidably installed at the edge of the dish antenna (2).

2. The offset-fed microwave antenna according to claim 1, characterized in that: The buffer device (9) includes an arc-shaped sleeve (91), with arc-shaped movable rods (92) slidably inserted at both ends of the sleeve (91). The ends of the two movable rods (92) located outside the sleeve (91) are respectively fixedly connected to two locking blocks (86). A second spring (93) is fixedly connected between the opposite ends of the two movable rods (92). A ring is rotatably sleeved in the middle of the sleeve (91), and a pull rod (94) is hinged to the bottom of the ring. A counterweight ball (95) is fixedly connected to the bottom of the pull rod (94).

3. The offset-fed microwave antenna according to claim 2, characterized in that: The rear side of the dish antenna (2) is provided with a plurality of strip plates (10), the strip plates (10) are vertically fixed to the rear side of the dish antenna (2), and the front side of the dish antenna (2) is provided with an arc-shaped scraper (11), the scraper (11) is fixedly connected to one of the locking blocks (86), and the scraper (11) is attached to the front side of the dish antenna (2).

4. The offset-fed microwave antenna according to claim 3, characterized in that: The rear side of the dish antenna (2) is fixedly connected to an annular protrusion (12), and the center of the annular protrusion (12) and the center of the ball of the dish antenna (2) are on the same straight line. A movable block (13) is slidably installed on the annular protrusion (12). Two second telescopic rods (14) are hinged between the movable block (13) and the front side of the support plate (3), and a third spring (15) is sleeved on the second telescopic rod (14).

5. The offset-fed microwave antenna according to claim 4, characterized in that: The fixing ring (81) is located at the center of the dish antenna (2), and a transparent protective plate (16) is fixedly connected to the top of the fixing ring (81). The protective plate (16) is arc-shaped and parallel to the length direction of the fixing ring (81).

6. The offset-fed microwave antenna according to claim 5, characterized in that: The scraper (11) and the support rod (85) on the corresponding card block (86) are located in the same plane, and the end of the scraper (11) away from the card block (86) is located at the center of the dish antenna (2).

7. The offset-fed microwave antenna according to claim 2, characterized in that: The tension of the second spring (93) on the two movable rods (92) is greater than the weight of the high frequency head (7), and the stretching ratio of the second spring (93) is the same as the compression ratio of the first spring (84).

8. The offset-fed microwave antenna according to claim 7, characterized in that: The weight of the counterweight ball (95) is greater than the friction between the sleeve (91) and the two movable rods (92), and the counterweight ball (95) does not contact the strip plate (10).

Images