Multi-loop antenna
By designing a multi-loop antenna and using the oscillator of λ/2 to form a ring body structure, the shortcomings of the existing antenna in terms of gain, size and anti-interference ability are solved, and the effects of high gain, miniaturization and strong anti-interference ability are achieved.
Patent Information
- Application Number
- CN202421311637.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
It is difficult for existing antennas to take into account high gain, miniaturization and anti-interference capabilities in vehicle-mounted or portable applications, and their impedance matching is complex, which affects the communication effect.
A multi-loop antenna is designed to wind the oscillator with a length of λ/2 to form an annular body structure, and the radial cross-sections of adjacent annular bodies are at an angle of 90° to enhance radiation capacity and reduce coupling effect.
It realizes the antenna's small size, high gain, strong anti-interference ability, convenient broadband working impedance matching, simple production and easy processing, and improves the communication quality and anti-interference ability of the equipment.
Smart Images
Figure CN222507981U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of communication, and in particular relates to a multi-ring antenna. Background Art
[0002] All wireless communication equipment cannot work without antennas. Antennas are also key components of wireless communication equipment. They can greatly affect the communication effect of the equipment. Reasonable and careful selection of antennas can achieve longer communication distances and better communication effects. Different wireless communication equipment has different requirements for antenna performance, appearance, and installation. The application of some antennas is often restricted by height. For resonant antennas, directly lowering the height will seriously affect the communication distance and communication effect, and even damage the communication equipment, so it is not advisable.
[0003] The size of the antenna is related to the operating frequency and type. Once the operating frequency of the antenna is determined and the type of antenna is selected, the size of the antenna is basically determined. Antennas in vehicle-mounted or portable applications often have high requirements for gain and miniaturization, which often makes antenna selection difficult. Common types of antennas either have low gain or are large in size, making it difficult to decide. Continuously developing new antenna types to better meet actual needs, high gain and miniaturization of antennas have always been topics that scientific researchers have been working hard to explore. Utility Model Content
[0004] In view of the above problems, the utility model proposes a multi-ring antenna, which has the advantages of small size, high gain, strong anti-interference ability, convenient broadband working impedance matching, simple and easy production and processing, etc.
[0005] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:
[0006] A multi-loop antenna, comprising:
[0007] Feed connector;
[0008] A plurality of insulating sheaths arranged in sequence;
[0009] An oscillator, wherein the length of the oscillator is λ / 2, where λ is the working wavelength; the first end of the oscillator sequentially passes through the first holes set on each insulating sheath and is connected to the core wire of the feeding connector, and the second end sequentially passes through the second holes set on each insulating sheath and approaches the core wire of the feeding connector and is in a suspended state; the portion of the oscillator between each adjacent insulating sheath is configured as a ring body, and a preset angle exists between the radial cross sections of adjacent ring bodies.
[0010] Optionally, the radial cross-section of each annular body is circular or polygonal.
[0011] Optionally, the radial cross-sectional dimensions of each annular body are equal or different.
[0012] Optionally, the radial cross-section of each annular body is in the shape of a non-closed ring.
[0013] Optionally, the vibrator is a single metal conductor or a plurality of metal conductors arranged in parallel.
[0014] Optionally, the angle between the radial cross sections of adjacent annular bodies is 90 degrees.
[0015] Optionally, when an insulating layer is provided on the outer wall of the vibrator, the angle between radial cross sections of adjacent annular bodies is 270 degrees.
[0016] Optionally, the multi-ring antenna further includes an antenna top cap and an antenna sheath, wherein the antenna sheath is sleeved on the outside of the vibrator, one end of the antenna sheath is connected to the housing of the feed connector, and the other end is connected to the antenna top cap.
[0017] Optionally, the multi-ring antenna also includes an impedance matcher, and the first end of the oscillator is disconnected from the core wire of the feed connector; the impedance matcher is a three-port network, the first port of the impedance matcher is connected to the first end of the oscillator, the second port is connected to the core wire of the feed connector, and the third port is connected to the shell of the feed connector.
[0018] Optionally, the multi-ring antenna also includes an impedance matcher, and the first end of the oscillator is disconnected from the core wire of the feed connector; the impedance matcher is a four-port network, the first port and the second port of the impedance matcher are respectively connected to the first end and the second end of the oscillator, and the third port and the fourth port are respectively connected to the core wire and the shell of the feed connector.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] The utility model provides a multi-ring antenna, which has the advantages of small size, high gain, strong anti-interference ability, convenient broadband working impedance matching, simple and easy production and processing, and the like.
[0021] The multi-loop antenna proposed in the utility model has a total length of λ / 2, and after zigzag winding, the length of the multi-loop antenna is about λ / 2π, which is significantly lower than λ / 4. Therefore, the length of the antenna made by the utility model is shorter than that of the whip antenna of λ / 4 and the J-type antenna of 3λ / 4. It can be seen that the utility model can reduce the length of the antenna.
[0022] The multi-ring antenna proposed in the present invention has a vibrator length of λ / 2, which is twice the vibrator length of the λ / 4 whip antenna, and the radiation capacity of the vibrator is improved. In addition, when the alternating current passes through the multi-rings that are 90° to each other, an electromagnetic field that changes with the shape will be generated. This changing electromagnetic field will enhance the radiation capacity of the antenna. Therefore, the multi-ring antenna proposed in the present invention has a stronger radiation capacity than the λ / 4 whip antenna, that is, it has a higher gain. The gain of the λ / 4 whip antenna is higher than that of the helical antenna. Therefore, the present invention can improve the antenna gain.
[0023] Since the radial cross sections of all adjacent annular bodies in the utility model are set to form a 90° angle with each other, the coupling effect of multiple rings can be effectively reduced. At the same time, the electromagnetic waves rotate through multiple rings during transmission, which will have a strong resistance to linear polarized electromagnetic waves and reduce the interference of external electromagnetic waves, thereby improving the communication quality. This is very important to improve the anti-interference ability of the equipment in the current complex electromagnetic environment.
[0024] The antenna made by the utility model is convenient for impedance matching with a network circuit at the end of the antenna because one end of the vibrator (the suspended end) is close to the housing of the feed connector, thereby achieving the purpose of expanding the working bandwidth of the antenna. This is a condition that other vertical antennas do not have, and is also one of the advantages of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to make the content of the utility model easier to understand, the utility model is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein:
[0026] Figure 1 This is a schematic diagram of a three-dimensional structure of a multi-ring vertical antenna of the utility model;
[0027] Figure 2 This is a partial schematic diagram of a multi-loop vertical antenna embodiment of the utility model, a manufacturing process 1;
[0028] Figure 3 This is a partial schematic diagram of a multi-loop vertical antenna embodiment of the utility model, a manufacturing process 2;
[0029] Figure 4 This is a schematic diagram of an embodiment of a multi-loop vertical antenna of the utility model, in which the outer surface of the vibrator is coated with an insulating layer and can be directly twisted;
[0030] Figure 5 This is a schematic diagram of an embodiment of a multi-loop vertical antenna of the utility model, in which an antenna sheath is added to a small antenna;
[0031] Figure 6This is a schematic diagram of an embodiment of a multi-loop vertical antenna of the utility model, in which an impedance matcher is added to the antenna to expand the working bandwidth;
[0032] Among them: 1-diopter, 2-insulating sheath, 3-feeding connector, 4-core rod, 5-antenna top cap, 6-antenna sheath, 7-impedance matcher. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.
[0034] In the description of the present utility model, it should be noted that the terms "up", "down", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.
[0035] In the description of this utility model patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood by specific circumstances.
[0036] The application principle of the utility model is described in detail below in conjunction with the accompanying drawings.
[0037] like Figure 1 As shown, the utility model provides a multi-ring antenna, comprising:
[0038] A feed connector 3, which is an interface device between the multi-ring antenna and a wireless communication device;
[0039] A plurality of insulating sheaths 2 are arranged in sequence; the insulating sheath 2 is used to prevent the vibrator 1 from short-circuiting at the intersection of multiple rings, and also plays a fixing and supporting role; in the specific implementation process, the insulating sheath 2 can use a double-hole insulating sheath, including a first hole and a second hole, and there is a distance between the first hole and the second hole, and the distance is set according to actual conditions;
[0040] An oscillator 1, wherein the length of the oscillator 1 is λ / 2, where λ is the working wavelength; the first end of the oscillator 1 sequentially passes through the first holes provided on each insulating sheath 2 and is connected to the core wire of the feeding connector 3, and the second end sequentially passes through the second holes provided on each insulating sheath 2 and approaches the core wire of the feeding connector 3 and is in a suspended state; the portion of the oscillator 1 between each adjacent insulating sheath 2 is configured as a ring body, and there is a preset angle between the radial cross sections of adjacent ring bodies.
[0041] In the specific implementation process, the number and diameter of the annular bodies can be comprehensively designed and considered according to specific application requirements.
[0042] The multi-ring antenna proposed in the present invention has a total length of λ / 2, and after winding, the antenna length is about λ / 2π, which is significantly lower than λ / 4. Therefore, the length of the antenna made by the present invention is lower than that of the whip antenna of λ / 4 and the J-type antenna of 3λ / 4. It can be seen that the present invention can reduce the length of the antenna. In addition, the antenna made by the present invention has a length of λ / 2, which is twice the length of the λ / 4 whip antenna, and the radiation capacity of the oscillator 1 is improved.
[0043] In one specific implementation of the embodiment of the utility model, the radial cross section of each annular body can be a circular ring; in another specific implementation of the embodiment of the utility model, the radial cross section of each annular body can be a polygon. The polygon can be a square or a hexagon, etc., which is specifically set according to actual needs.
[0044] In a specific implementation of the embodiment of the utility model, the radial cross-sectional dimensions of each annular body are equal or unequal, and are specifically set according to actual needs.
[0045] In a specific implementation of the embodiment of the utility model, the radial cross-section of each annular body is a non-closed ring, which can prevent the vibrator from short-circuiting at the intersection of multiple rings.
[0046] In a specific implementation of the utility model embodiment, the vibrator 1 is a single metal conductor or a plurality of metal conductors arranged in parallel. The angle between the radial cross sections of adjacent annular bodies is 90 degrees. Since the radial cross sections of all adjacent annular bodies in the utility model are arranged to be at a 90° angle to each other, the coupling effect of multiple rings can be effectively reduced. At the same time, the electromagnetic waves rotate through multiple rings multiple times during the transmission process, which will have a strong resistance to linearly polarized electromagnetic waves, and can reduce the interference of external electromagnetic waves, thereby improving the communication quality. This is very important to improve the anti-interference ability of the equipment in the current complex electromagnetic environment.
[0047] In a specific implementation of the embodiment of the utility model, when an insulating layer is provided on the outer wall of the vibrator 1, the angle between the radial cross sections of adjacent annular bodies is 270 degrees. Figure 4 .
[0048] In a specific implementation of the utility model embodiment, the multi-ring antenna further includes an antenna top cap 5 and an antenna sheath 6, wherein the antenna sheath 6 is sleeved on the outside of the vibrator 1, one end of which is connected to the housing of the feed connector 3, and the other end is connected to the antenna top cap 5, see Figure 5 .
[0049] In a specific implementation of an embodiment of the utility model, in order to expand the antenna working bandwidth, the multi-ring antenna also includes an impedance matcher 7, and the first end of the vibrator 1 is disconnected from the core wire of the feed connector 3; the impedance matcher 7 is a three-port network, the first port of the impedance matcher 7 is connected to the first end of the vibrator 1, the second port is connected to the core wire of the feed connector 3, and the third port is connected to the shell of the feed connector 3.
[0050] In another specific implementation of the embodiment of the utility model, in order to expand the antenna working bandwidth, the multi-ring antenna also includes an impedance matcher 7, the first end of the vibrator 1 is disconnected from the core wire of the feed connector 3, the impedance matcher 7 is a four-port network, the first port and the second port of the impedance matcher 7 are respectively connected to the first end and the second end of the vibrator 1, and the third port and the fourth port are respectively connected to the core wire and the shell of the feed connector 3. For details, see Figure 6 .
[0051] The manufacturing process of the multi-ring antenna in the present invention is described in detail below in conjunction with a specific implementation manner.
[0052] A copper conductor is selected as the vibrator 1, the cross section of the ring body is set to be a circular ring, the diameter of the circular ring is set to 0.01λ, the number of the ring bodies is set to 8, the feed connector 3 is selected as appropriate, and the insulating sheath 2 adopts a double-hole epoxy insulating sleeve.
[0053] The vibrator 1 with a length of λ / 2 is folded and wound on the first core rod 4 (winding tool), and then inserted into the first insulating sheath 2, and then the copper conductor is folded and wound on the second core rod 4 until 8 ring bodies are obtained, and then inserted into 8 insulating sheaths 2. The manufacturing process is partially as follows Figure 2 shown.
[0054] The first mandrel 4 and the second mandrel 4 are rotated in opposite directions by 45° to form adjacent annular surfaces at 90° to each other, as shown in FIG. Figure 3 shown.
[0055] According to the principle that the rotation direction of the next core rod 4 is opposite to the rotation direction of the previous core rod 4, each core rod 4 is rotated 45 degrees in sequence until adjacent ring surfaces are made 90 degrees to each other. One end of the vibrator 1 is welded to the core wire of the feed connector 3, and the other end is trimmed to an appropriate length for adjusting the center frequency. After the center frequency adjustment is completed, it is suspended in the air to complete the production of the multi-ring antenna. Figure 1 shown.
[0056] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. 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, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A multi-ring antenna, characterized in that: include: Feed connector; A plurality of insulating sheaths arranged in sequence; An oscillator, wherein the length of the oscillator is λ / 2, where λ is the working wavelength; the first end of the oscillator sequentially passes through the first holes provided on each insulating sheath and is connected to the core wire of the feeding connector, and the second end sequentially passes through the second holes provided on each insulating sheath and is close to the core wire of the feeding connector and is in a suspended state; The portion of the vibrator between adjacent insulating sheaths is configured as a ring body, and a preset angle exists between radial cross sections of adjacent ring bodies.
2. A multi-loop antenna according to claim 1, characterized in that: The radial cross section of each annular body is a circular ring or a polygon.
3. A multi-loop antenna according to claim 1, characterized in that: The radial cross-sectional dimensions of each annular body are equal or different.
4. A multi-loop antenna according to claim 1, characterized in that: The radial cross section of each annular body is in the shape of a non-closed ring.
5. The multi-loop antenna according to claim 1, characterized in that: The vibrator is a single metal conductor or a plurality of metal conductors arranged in parallel.
6. A multi-loop antenna according to claim 5, characterized in that: The included angle between the radial cross sections of adjacent annular bodies is 90 degrees.
7. A multi-loop antenna according to claim 5, characterized in that: When an insulating layer is provided on the outer wall of the vibrator, the angle between the radial cross sections of adjacent annular bodies is 270 degrees.
8. The multi-loop antenna according to claim 1, characterized in that: The multi-ring antenna also includes an antenna top cap and an antenna sheath. The antenna sheath is sleeved on the outside of the vibrator, one end of the antenna sheath is connected to the shell of the feed connector, and the other end is connected to the antenna top cap.
9. The multi-loop antenna according to claim 1, characterized in that: The multi-ring antenna also includes an impedance matcher, the first end of the oscillator is disconnected from the core wire of the feed connector; the impedance matcher is a three-port network, the first port of the impedance matcher is connected to the first end of the oscillator, the second port is connected to the core wire of the feed connector, and the third port is connected to the shell of the feed connector.
10. The multi-loop antenna according to claim 1, characterized in that: The multi-ring antenna also includes an impedance matcher, and the first end of the oscillator is disconnected from the core wire of the feed connector; the impedance matcher is a four-port network, the first port and the second port of the impedance matcher are respectively connected to the first end and the second end of the oscillator, and the third port and the fourth port are respectively connected to the core wire and the shell of the feed connector.