Miniaturized double-frequency knife-shaped antenna

Abstract

The utility model discloses a miniaturized double-frequency knife-shaped antenna, and particularly relates to the field of antennae, the interior of an antenna body is fixedly connected with a pcb, the pcb is electrically connected with a low-frequency antenna radiator, a high-frequency antenna radiator and a loading resistor, the bottom of the low-frequency antenna radiator is in short circuit with an antenna bottom plate, the middle end of the low-frequency antenna radiator is electrically connected with the loading resistor, and the high-frequency antenna radiator is electrically connected with the loading resistor. The top of the low-frequency antenna radiator and the bottom of the high-frequency antenna radiator are designed in a fusion manner; and the high-frequency antenna radiator is fed through a short-circuit point of the low-frequency antenna radiator and is connected to an output port of the antenna bottom plate. Through cooperation of the structures, on the premise that the knife-shaped appearance of the antenna is met, the radiation environment of the antenna is optimized, omnidirectional radiation of an electromagnetic wave azimuth plane is achieved, and high-frequency and low-frequency directional diagrams do not interfere with each other; and meanwhile, by designing a connecting structure between the two frequency bands, the antenna can meet vertical polarization radiation of single-port dual-frequency and dual-port dual-frequency according to requirements, and the application scenarios are greatly enriched.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, in particular to a miniaturized dual-frequency blade-shaped antenna. Background Art

[0002] With the rapid development of the communications industry, network architecture systems are changing with each passing day, antenna application scenarios are complex and changeable, the application of antennas in different frequency bands is becoming increasingly complicated, and antennas are gradually shifting towards miniaturization and irregularity. The demand for combined multi-band antennas is becoming increasingly urgent.

[0003] A Chinese patent discloses a dual-frequency antenna with a publication number of CN212751152U, and the application date is 2020.08.11. This patent technology improves the bandwidth and depth of the standing wave through the coordination of each vibrator structure, and utilizes electromagnetic field coupling and impedance matching, thereby improving the radiation efficiency and gain of small external and internal dual-frequency antennas, and increasing the field radiation coverage, while reducing the size of the multi-band antenna and reducing the cost of use. However, when the above patent is used, it cannot meet the free switching of high-frequency antennas and low-frequency antennas, so that when two high- and low-frequency antennas are used, the high- and low-frequency antennas will interfere with each other, affecting the use of the device. Therefore, the inventor provides a miniaturized dual-frequency blade-type antenna to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a miniaturized dual-frequency blade-shaped antenna to achieve the effect that high-frequency and low-frequency antennas do not interfere with each other.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A miniaturized dual-frequency blade-shaped antenna comprises an antenna base plate, an antenna body is installed on the top of the antenna base plate, a PCB is fixedly connected inside the antenna body, a low-frequency antenna radiator, a high-frequency antenna radiator and a loading resistor are electrically connected on the PCB, the bottom of the low-frequency antenna radiator is short-circuited with the antenna base plate, the middle end is electrically connected through the loading resistor, the top of the low-frequency antenna radiator and the bottom of the high-frequency antenna radiator are fused, the high-frequency antenna radiator is fed through the short-circuit point of the low-frequency antenna radiator and connected to the output port installed on the antenna base plate, a feeding network is arranged inside the low-frequency antenna radiator; and a protective cover that can be easily installed is arranged on the outside of the antenna base plate.

[0007] As a further solution of the utility model: connecting blocks 31 are fixedly connected to both sides of the protective cover, and fixing grooves are provided on both sides of the connecting blocks; positioning grooves are provided on the left and right sides of the top of the antenna base plate, and movable grooves are provided on both sides of the positioning groove, and an insert block that can move forward and backward is installed inside the movable groove.

[0008] As a further solution of the utility model: a guide block is fixedly connected to one side of the inner part of the movable groove; a sliding groove is opened on one side of the insertion block, and the sliding groove is slidably connected to the guide block; a support spring is fixedly connected to one side of the inner part of the movable groove, and the other side of the support spring is fixedly connected to the corresponding insertion block.

[0009] As a further solution of the utility model: the cross section of the sliding groove is adapted to the surface of the guide block.

[0010] As a further solution of the utility model: one side surface of the insert block is designed to be an arc-shaped that gradually becomes longer from top to bottom.

[0011] As a further solution of the utility model: a connecting groove is provided at the top of the movable groove, a pulling rod is slidably connected inside the connecting groove, and the bottom of the pulling rod is fixedly connected to the insert block.

[0012] As a further solution of the present invention: the antenna body is knife-shaped.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The miniaturized dual-frequency blade-shaped antenna has a low-frequency antenna radiator whose bottom is short-circuited with the antenna base plate and whose middle end is electrically connected via a loading resistor. The top of the low-frequency antenna radiator and the bottom of the high-frequency antenna radiator are fused together, and the high-frequency antenna radiator is fed through the short-circuit point of the low-frequency antenna radiator and connected to the output port installed on the antenna base plate. The coordination of the above structures enables the present invention to optimize the radiation environment of the antenna while meeting the blade-shaped appearance of the antenna, and to achieve omnidirectional radiation of the electromagnetic wave azimuth plane, with high and low frequency directional patterns not interfering with each other. At the same time, by designing the connection structure between the two frequency bands, the antenna can meet the vertical polarization radiation of single-port dual-frequency and dual-port dual-frequency according to requirements, greatly enriching the application scenarios.

[0015] In addition, the miniaturized dual-band blade antenna is provided with a protective cover sleeved on the outside of the antenna body so that the bottom of the protective cover fits with the surface of the antenna bottom plate, and at this time, the connecting block is inserted into the corresponding positioning groove. When the connecting block is inserted into the positioning groove, it gradually contacts the surfaces of the plug-in blocks on both sides. The pressing force during contact causes the two plug-in blocks to move in opposite directions, and at the same time, the support spring is compressed until the plug-in block corresponds to the fixed groove position, and the plug-in block loses the pressing force, so that the support spring rebounds and drives the plug-in block to be inserted into the fixed groove, thereby completing the installation of the protective cover on the antenna body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of the antenna body of a miniaturized dual-frequency blade-shaped antenna;

[0017] Figure 2It is a three-dimensional schematic diagram of the overall structure of a miniaturized dual-frequency blade-shaped antenna;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of a protective cover in a miniaturized dual-frequency blade-shaped antenna;

[0019] Figure 4 This is a schematic diagram of the structure at A in a miniaturized dual-frequency blade-shaped antenna;

[0020] Figure 5 This is a schematic diagram of the structure at B in a miniaturized dual-frequency blade-shaped antenna;

[0021] In the figure: 10, antenna base plate; 11, antenna body; 20, PCB board; 21, low-frequency antenna radiator; 22, loading resistor; 23, high-frequency antenna radiator; 24, feeding network; 30, protective cover; 31, connecting block; 32, fixing slot; 33, positioning slot; 34, moving slot; 35, guide block; 36, plug-in block; 37, sliding slot; 38, supporting spring; 39, connecting slot; 40, pulling rod. DETAILED DESCRIPTION

[0022] like Figure 1 , 2 As shown, a miniaturized dual-frequency blade-shaped antenna includes an antenna base plate 10, an antenna body 11 is installed on the top of the antenna base plate 10, and the antenna body 11 is blade-shaped; a PCB board 20 is fixedly connected inside the antenna body 11, and a low-frequency antenna radiator 21, a high-frequency antenna radiator 23, and a loading resistor 22 are electrically connected to the PCB board 20. The bottom of the low-frequency antenna radiator 21 is short-circuited with the antenna base plate 10, and the middle end is electrically connected through the loading resistor 22. The top of the low-frequency antenna radiator 21 and the bottom of the high-frequency antenna radiator 23 are fused, and the high-frequency antenna radiator 23 is fed through the short-circuit point of the low-frequency antenna radiator 21 and connected to the output port installed on the antenna base plate 10. A feeding network 24 is arranged inside the low-frequency antenna radiator 21. Since the low-frequency antenna radiator 21 is connected to the high-frequency antenna radiator 23, the feeding network 24 can transmit or feedback the information of the above two antenna radiators.

[0023] Under the premise of meeting the knife-shaped appearance of the antenna, the present invention optimizes the radiation environment of the antenna and realizes omnidirectional radiation of the electromagnetic wave azimuth plane, and the high-frequency and low-frequency directional patterns do not interfere with each other; at the same time, by designing the connection structure between the two frequency bands, the antenna can meet the vertical polarization radiation of single-port dual-frequency and dual-port dual-frequency according to needs, which greatly enriches the application scenarios.

[0024] Since the antenna is usually placed in an open-air environment for operation, it is directly attacked by storms, snow, dust and solar radiation in nature, which results in reduced antenna accuracy, shortened service life and poor working reliability. Therefore, the antenna body 11 needs to be protected.

[0025] refer to Figure 3 , 4 5. A protective cover 30 is provided on the outer side of the antenna body 11. The inner shape of the protective cover 30 is adapted to the outer shape of the antenna body 11. Connecting blocks 31 are fixedly connected to the left and right sides of the protective cover 30. The front and rear sides of the connecting block 31 are provided with fixing grooves 32. Positioning grooves 33 are provided on the left and right sides of the top of the antenna base plate 10. The front and rear sides of the positioning groove 33 are provided with movable grooves 34. An insert block 36 that can move forward and backward is installed inside the movable groove 34.

[0026] Specifically, refer to Figure 4 , guide blocks 35 are fixedly connected to the inner opposite sides of the two movable grooves 34; a sliding groove 37 is opened on the outer side of the insertion block 36, and the sliding groove 37 is slidably connected to the guide block 35, and the cross-section of the sliding groove 37 is adapted to the surface of the guide block 35, so as to guide the insertion block 36 when it moves; support springs 38 are fixedly connected to the inner opposite sides of the two movable grooves 34, and the other side of the support spring 38 is fixedly connected to the corresponding insertion block 36.

[0027] Preferably, the opposite side surfaces of the two plug-in blocks 36 are designed to be arc-shaped and gradually become longer from top to bottom. When in use, the protective cover 30 is sleeved on the outside of the antenna body 11 so that the bottom of the protective cover 30 fits the surface of the antenna bottom plate 10, and the connecting block 31 is inserted into the corresponding positioning groove 33. When the connecting block 31 is inserted into the positioning groove 33, it will gradually contact the surfaces of the plug-in blocks 36 on both sides. The pressing force during contact causes the two plug-in blocks 36 to move in opposite directions, and at the same time compresses the support spring 38 until the plug-in block 36 corresponds to the fixed groove 32. The plug-in block 36 loses the pressing force, so that the support spring 38 rebounds and drives the plug-in block 36 to be inserted into the fixed groove 32, thereby completing the installation of the protective cover 30 on the antenna body 11.

[0028] Preferably, a connection groove 39 is provided at the top of the movable groove 34, a pull rod 40 is slidably connected inside the connection groove 39, and the bottom of the pull rod 40 is fixedly connected to the plug block 36. When the protective cover 30 is damaged, the staff can pull out the pull rods 40 on both sides to make the pull rods 40 drive the plug block 36 to move outward and out of the fixed groove 32, so that the protective cover 30 can be easily taken out and replaced.

[0029] The working principle of the present invention is: the bottom of the low-frequency antenna radiator 21 is short-circuited with the antenna base plate 10, and the middle end is electrically connected through the loading resistor 22. The top of the low-frequency antenna radiator 21 and the bottom of the high-frequency antenna radiator 23 are fused together, and the high-frequency antenna radiator 23 is fed through the short-circuit point of the low-frequency antenna radiator 21 and connected to the output port installed on the antenna base plate 10. The coordination of the above structures enables the present invention to optimize the radiation environment of the antenna while meeting the knife-shaped appearance of the antenna, and to achieve omnidirectional radiation of the electromagnetic wave azimuth plane, and the high and low frequency directional patterns do not interfere with each other; at the same time, by designing the connection structure between the two frequency bands, the antenna can meet the vertical polarization radiation of single-port dual-frequency and dual-port dual-frequency according to needs, which greatly enriches the application scenarios.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A miniaturized dual-frequency blade antenna, comprising an antenna base plate (10), an antenna body (11) being mounted on the top of the antenna base plate (10), characterized in that: The antenna body (11) is fixedly connected to a PCB (20) inside, and a low-frequency antenna radiator (21), a high-frequency antenna radiator (23), and a loading resistor (22) are electrically connected to the PCB (20); the bottom of the low-frequency antenna radiator (21) is short-circuited with the antenna base plate (10), and the middle end is electrically connected through the loading resistor (22); the top of the low-frequency antenna radiator (21) and the bottom of the high-frequency antenna radiator (23) are fused together, and the high-frequency antenna radiator (23) is fed through a short-circuit point of the low-frequency antenna radiator (21) and connected to an output port installed on the antenna base plate (10); a feeding network (24) is arranged inside the low-frequency antenna radiator (21); and a protective cover (30) that can be easily installed is arranged on the outside of the antenna base plate (10).

2. A miniaturized dual-frequency blade antenna according to claim 1, characterized in that: The protective cover (30) is fixedly connected with connecting blocks (31) on both sides, and fixing grooves (32) are provided on both sides of the connecting blocks (31); positioning grooves (33) are provided on the left and right sides of the top of the antenna base plate (10), and movable grooves (34) are provided on both sides of the interior of the positioning groove (33), and an insert block (36) that can move forward and backward is installed inside the movable groove (34).

3. A miniaturized dual-frequency blade antenna according to claim 2, characterized in that: A guide block (35) is fixedly connected to one side of the movable groove (34); a sliding groove (37) is provided on one side of the plug block (36); the sliding groove (37) is slidably connected to the guide block (35); a support spring (38) is fixedly connected to one side of the movable groove (34); the other side of the support spring (38) is fixedly connected to the corresponding plug block (36).

4. A miniaturized dual-frequency blade antenna according to claim 3, characterized in that: The cross section of the sliding groove (37) is adapted to the surface of the guide block (35).

5. The miniaturized dual-frequency blade antenna according to claim 2, characterized in that: One side surface of the insert block (36) is designed to be an arc shape that gradually becomes longer from top to bottom.

6. A miniaturized dual-frequency blade antenna according to claim 2, characterized in that: A connecting groove (39) is provided at the top of the movable groove (34), a pulling rod (40) is slidably connected inside the connecting groove (39), and the bottom of the pulling rod (40) is fixedly connected to the insert block (36).

7. The miniaturized dual-frequency blade antenna according to claim 1, characterized in that: The antenna body (11) is knife-shaped.

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