S-band rectangular tooth perturbation butterfly-shaped metal oscillator antenna
By designing an S-band rectangular-tooth perturbation butterfly metal vibrator antenna, employing a gradient feed line and reflector structure, and combining perturbation rectangular teeth and triangular cutout areas, the problem of narrow bandwidth of the vibrator antenna was solved, achieving high-efficiency broadband communication performance.
Patent Information
- Application Number
- CN202511876406.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-02-27
AI Technical Summary
Existing dipole antennas have relatively narrow bandwidth, poor impedance matching, and insufficient current path optimization, resulting in increased signal reflection and reduced efficiency, making it difficult to meet the needs of modern broadband communication.
Design an S-band rectangular tooth perturbation butterfly metal dipole antenna, which adopts a gradient plate feed line and reflector structure, combined with perturbation rectangular teeth and triangular hollow areas, to extend the operating bandwidth through impedance matching and surface current modulation, and to achieve frequency fine-tuning through a tuner block.
It effectively expands the operating bandwidth to approximately 22%, achieving high-performance S-band radiation with good gain stability and mechanical stability, high signal transmission efficiency, and low reflection loss.
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Figure CN121584207A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of wireless communication, in particular to an S-band rectangular-tooth perturbation butterfly-shaped metal dipole antenna. BACKGROUND
[0002] A dipole antenna is one of the core elements in antenna technology and is widely used in the fields of communication, radar, broadcasting and the like. The dipole antenna is composed of a pair of symmetrical conductors, the length of which is usually one-half of the working wavelength, and the dipole antenna radiates electromagnetic waves by exciting current in the conductors through feeding.
[0003] The dipole antenna is the most basic antenna, which has simple structure, low cost and is easy to process and manufacture, and is widely used in the field of communication. However, the relative bandwidth of the dipole antenna is only about 13% at most, and the limiting factors include poor impedance matching of the feeding end and insufficient optimization of the current path. This leads to increased signal reflection and reduced efficiency, and it is difficult to meet the modern broadband communication demand. Therefore, the application provides an S-band rectangular-tooth perturbation butterfly-shaped metal dipole antenna. SUMMARY
[0004] The application aims to solve the problem that the poor impedance matching of the antenna in the background art affects the bandwidth, and provides an S-band rectangular-tooth perturbation butterfly-shaped metal dipole antenna.
[0005] The technical scheme of the application is as follows: an S-band rectangular-tooth perturbation butterfly-shaped metal dipole antenna, which comprises a butterfly-shaped dipole body, a metal dipole antenna main body composed of a gradually-changing plate-shaped feeding line and a reflector plate, the gradually-changing plate-shaped feeding line is composed of a metal plate and a center feeding column which is bent in the middle, the reflector plate is internally provided with a coaxial connector, the inner conductor of the coaxial connector is connected with the center feeding column, the metal plate is connected with the narrow end of the butterfly-shaped dipole body, the butterfly-shaped dipole body is etched with perturbation rectangular teeth on the side, and the perturbation rectangular teeth are symmetrically distributed on the butterfly-shaped dipole body.
[0006] Optionally, a triangular hollow region is formed in the middle of the butterfly-shaped dipole body, and the length of the base of the triangular hollow region is one-half of the length of the wide side of the butterfly-shaped dipole body.
[0007] Optionally, a foam support column is arranged at the bottom end of the butterfly-shaped dipole body, the bottom end of the foam support column is perpendicularly connected with the reflector plate, the foam support column is used for supporting and fixing the butterfly-shaped dipole body, the length of the foam support column is consistent with the width of the butterfly-shaped dipole body, and the width of the foam support column is 10 mm.
[0008] Optionally, the perturbation rectangular teeth are arranged at equal intervals, and the number of the perturbation rectangular teeth is 10.
[0009] Optionally, the metal plate gradually widens from top to bottom, and the metal plate is perpendicularly connected above the reflector plate.
[0010] Optionally, the ratio of the narrow end to the wide end of the metal plate is 1:3.
[0011] Optionally, the height of the center feeding column is the same as the height of the metal plate, and the radius of the center feeding column is 0.5 mm.
[0012] Optionally, the top end of the butterfly-shaped vibrator body is provided with two groups of cross plates, the top end of each group of cross plates is provided with a rotating disc, the bottom end of the rotating disc is fixedly connected with a screw rod, the screw rod is rotationally connected with the butterfly-shaped vibrator body, and the screw rod is threadedly connected with the inside of the cross plate, the bottom end of the cross plate is fixedly connected with a tuning block corresponding to the perturbation rectangular tooth, the tuning block is used for fine tuning the working frequency of the antenna, the top end of the butterfly-shaped vibrator body is fixedly connected with a limiting rod, and the limiting rod slidably penetrates through the cross plate.
[0013] Optionally, the array of heat dissipation holes is arranged below the reflecting plate, and is used for improving the heat dissipation performance.
[0014] Optionally, the reinforcing rib is connected between the foam supporting column and the reflecting plate, so as to enhance the mechanical stability.
[0015] Compared with the prior art, the application has at least one of the following beneficial technical effects: The application effectively expands the working bandwidth through the impedance matching design of the gradually changing feeding line and the butterfly-shaped vibrator body, and the triangular hollow region guarantees the symmetry of the radiation pattern and the stability of the gain while reducing the weight, the overall structure has excellent impedance characteristics and mechanical stability, and the S-band radiation effect with high performance is realized.
[0016] Further, through the structural design of the tuning block, the rotating disc is manually rotated to drive the screw rod, the cross plate and the tuning block are accurately translated, the electromagnetic coupling state of the tuning block and the perturbation rectangular tooth is changed, and the antenna working frequency is conveniently and continuously fine tuned. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 FIG. 1 is a three-dimensional schematic view of a butterfly-shaped rectangular tooth perturbation metal vibrator antenna; Figure 2 FIG. 2 is a structural schematic view of a butterfly-shaped metal vibrator and a foam supporting column; Figure 3 FIG. 3 is a top view schematic view of a butterfly-shaped rectangular tooth perturbation metal vibrator antenna; Figure 4 FIG. 4 is a side view schematic view of a butterfly-shaped rectangular tooth perturbation metal vibrator antenna; Figure 5 FIG. 5 is a structural schematic view of a screw rod and a cross plate; Figure 6 FIG. 6 is a return loss schematic view of a butterfly-shaped rectangular tooth perturbation metal vibrator antenna Figure 7 The schematic diagram of normal gain of each frequency point of the perturbation metal dipole with a butterfly-shaped rectangular tooth.
[0018] Fig. 1 is a schematic diagram of a butterfly-shaped dipole body; Fig. 2 is a schematic diagram of a perturbation rectangular tooth; Fig. 3 is a schematic diagram of a center feeding column; Fig. 4 is a schematic diagram of a triangular hollowed region; Fig. 5 is a schematic diagram of a foam support column; Fig. 6 is a schematic diagram of a reflecting plate; Fig. 9 is a schematic diagram of a metal plate; Fig. 10 is a schematic diagram of a coaxial connector; Fig. 20 is a schematic diagram of a cross plate; Fig. 21 is a schematic diagram of a rotating disc; Fig. 22 is a schematic diagram of a screw rod; Fig. 23 is a schematic diagram of a tuning block; Fig. 24 is a schematic diagram of a limiting rod; Fig. 25 is a schematic diagram of an array of heat dissipation holes; and Fig. 26 is a schematic diagram of a reinforcing rib. DETAILED DESCRIPTION
[0019] In order to make the inventive purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the following described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0020] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.
[0021] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings and through specific embodiments.
[0022] As Figure 1 - Figure 7As shown, the present application provides a S-band rectangular tooth perturbation bowtie metal monopole antenna, which comprises a metal monopole antenna main body composed of a bowtie monopole body 1, a gradually changing plate-shaped feed line and a reflector plate 6. The gradually changing plate-shaped feed line is composed of a metal plate 9 and a center feed column 3 with a bend in the middle. The gradually changing structure is used to achieve impedance matching, and the bend design of the center feed column 3 facilitates connection and enhances structural stability. The reflector plate 6 is internally provided with a coaxial connector 10. The reflector plate 6 serves as a ground reference surface, shielding the rear-end interference and enhancing forward radiation. The coaxial connector 10 realizes efficient signal transmission. The inner conductor of the coaxial connector 10 is connected with the center feed column 3, the metal plate 9 is connected with the narrow end of the bowtie monopole body 1, forming effective feed excitation. The metal plate 9 gradually widens from top to bottom, realizing smooth impedance transformation between the feed point and the bowtie radiator, improving energy transmission efficiency. The metal plate 9 is vertically connected above the reflector plate 6, providing stable electrical connection and mechanical support for the bowtie monopole body 1, and also forming a complete antenna radiation structure with the reflector plate 6. The ratio of the narrow end to the wide end of the metal plate 9 is 1:3, realizing effective stepped impedance transformation between the gradually changing plate-shaped feed line and the bowtie monopole body 1, thereby minimizing the reflection loss. The bowtie monopole body 1 is etched with perturbation rectangular teeth 2 on the edge. The periodic structural perturbation expands the antenna bandwidth and optimizes the radiation performance. The perturbation rectangular teeth 2 are symmetrically distributed in the center of the bowtie monopole body 1 to ensure the symmetry of the radiation pattern. The perturbation rectangular teeth 2 are arranged at equal intervals, with a number of 10, forming a periodic structural perturbation at the edge of the bowtie monopole body 1, thereby effectively regulating the surface current distribution and optimizing the radiation characteristics of the antenna.
[0023] As an embodiment, as shown in Figure 1 The bowtie monopole body 1 is provided with a triangular hollow area 4 in the middle. The hollow structure helps to guide the surface current path, reduce the weight of the antenna and optimize the radiation field pattern, further match the impedance and improve the antenna gain. The length of the base of the triangular hollow area 4 is half of the width of the bowtie monopole body 1, so as to reduce the metal area while maintaining good impedance matching and radiation efficiency.
[0024] Further, as shown in Figure 2 and Figure 4 The bowtie monopole body 1 is provided with a foam support column 5 at the bottom end. The bottom end of the foam support column 5 is vertically connected with the reflector plate 6. The low dielectric constant property of the foam support column 5 can effectively reduce the influence on the near-field distribution of the antenna. The foam support column 5 is used to support and fix the bowtie monopole body 1. The length of the foam support column 5 is consistent with the width of the bowtie monopole body 1, so as to provide sufficient support along the width direction of the monopole. The width of the foam support column 5 is 10 mm, which ensures the mechanical support stiffness while avoiding excessive shielding of the radiation aperture.
[0025] Further, as shown in Figure 2 and Figure 4 , the height of the center feed post 3 is the same as the height of the metal plate 9, which ensures the coplanarity and structural stability of the connection between the feed post and the upper dipole and the lower connector, the radius of the center feed post 3 is 0.5mm, which takes into account sufficient mechanical strength and good 73 ohm impedance matching, and minimizes the shielding of the antenna radiation field.
[0026] As an embodiment, as shown in Figure 1 and Figure 5 , the top end of the butterfly-shaped dipole body 1 is provided with two groups of transverse plates 20 for carrying out frequency tuning, the top end of each of the two groups of transverse plates 20 is provided with a turntable 21, when fine-tuning the antenna operating frequency, first rotate the turntable 21, the bottom end of the turntable 21 is fixedly connected with a screw rod 22, the screw rod 22 is rotationally connected with the butterfly-shaped dipole body 1, and the screw rod 22 is threadedly connected with the inside of the transverse plate 20, the turntable 21 drives the screw rod 22 to rotate synchronously when rotating, thereby driving the transverse plate 20 to move, the bottom end of the transverse plate 20 is fixedly connected with a tuning block 23 corresponding to the perturbed rectangular tooth 2, the tuning block 23 serves as an effective part of frequency tuning, and its movement can change the electromagnetic coupling state of the perturbed rectangular tooth 2, the movement of the transverse plate 20 drives the tuning block 23 to move, the tuning block 23 is used for fine-tuning the antenna operating frequency, thereby affecting or changing the field distribution structure near the perturbed rectangular tooth 2, the top end of the butterfly-shaped dipole body 1 is fixedly connected with a limiting rod 24, the limiting rod 24 slides through the transverse plate 20, and the limiting rod 24 plays a guiding role in the movement of the transverse plate 20.
[0027] Further, as shown in Figure 1 and Figure 2 , the S-band rectangular tooth perturbed butterfly-shaped metal dipole antenna further comprises a heat dissipation hole array 25, the heat dissipation hole array 25 is arranged below the reflecting plate 6, the heat dissipation hole array 25 effectively increases the heat dissipation area without significantly weakening the structural rigidity of the reflecting plate 6, and significantly improves the heat dissipation performance of the antenna by promoting air convection, thereby guaranteeing the thermal stability of the antenna during long-term operation.
[0028] Further, as shown in Figure 1 and Figure 2 , the S-band rectangular tooth perturbed butterfly-shaped metal dipole antenna further comprises a reinforcing rib 26, the reinforcing rib 26 connects the foam support column 5 and the reflecting plate 6, significantly increases the connection rigidity and contact area between the two, and can effectively suppress the shaking or deformation of the foam support column 5 under vibration and impact conditions, thereby greatly enhancing the overall mechanical stability and environmental adaptability of the antenna.
[0029] Working principle: the signal is input through the coaxial connector 10, and the impedance matching and balanced feeding are realized by the tapered feed line structure composed of the center feed column 3 and the metal plate 9, the single-ended signal is converted into a differential signal to excite the butterfly-shaped vibrator body 1; the butterfly-shaped vibrator body 1 changes the impedance of the current path continuously through its gradually widening shape, and combines the parasitic reactance introduced by the perturbed rectangular teeth 2 etched on the edge to suppress signal reflection and expand bandwidth; the central triangular hollow area 4 effectively reduces the loss and optimizes the current distribution; finally, under the cooperation of the reflecting plate 6, the antenna forms stable radiation in the S-band, realizes a bandwidth of about 22%, as shown in Figure 7 The antenna shows excellent gain flatness in this frequency band, with a peak gain of about 7.2 dB, and the entire in-band gain fluctuation is very small (about 0.17 dB), which ensures the stability of the radiation performance.
[0030] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. An S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna, comprising a main body of a metal dipole antenna consisting of a butterfly-shaped dipole body (1), a tapered plate-shaped feed line, and a reflector plate (6), characterized in that, The gradient plate-shaped feed line is composed of a metal plate (9) and a central feed post (3) with a bend in the middle. A coaxial connector (10) is installed inside the reflector plate (6). The internal conductor of the coaxial connector (10) is connected to the central feed post (3). The metal plate (9) is connected to the narrow end of the butterfly oscillator body (1). The butterfly oscillator body (1) is etched with perturbation rectangular teeth (2) on its side. The perturbation rectangular teeth (2) are symmetrically distributed on the butterfly oscillator body (1).
2. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The butterfly-shaped oscillator body (1) has a triangular hollow area (4) in the middle, and the length of the base of the triangular hollow area (4) is half the width of the butterfly-shaped oscillator body (1).
3. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The bottom end of the butterfly-shaped oscillator body (1) is provided with a foam support column (5). The bottom end of the foam support column (5) is vertically connected to the reflector plate (6). The foam support column (5) is used to support and fix the butterfly-shaped oscillator body (1). The length of the foam support column (5) is the same as the width of the butterfly-shaped oscillator body (1). The width of the foam support column (5) is 10mm.
4. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The micro-perturbation rectangular teeth (2) are arranged at equal intervals, and the number of teeth is 10.
5. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The metal plate (9) gradually widens from top to bottom, and the metal plate (9) is vertically connected above the reflector (6).
6. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The ratio of the narrow end to the wide end of the metal plate (9) is 1:
3.
7. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The height of the central feed post (3) is the same as the height of the metal plate (9), and the radius of the central feed post (3) is 0.5 mm.
8. The S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 1, characterized in that, The top of the butterfly-shaped vibrator body (1) is provided with two sets of horizontal plates (20), and the top of each set of horizontal plates (20) is provided with a turntable (21). The bottom of the turntable (21) is fixedly connected with a screw (22). The screw (22) is rotatably connected to the butterfly-shaped vibrator body (1), and the screw (22) is connected to the internal thread of the horizontal plate (20). The bottom of the horizontal plate (20) is fixedly connected with a tuning block (23) corresponding to the perturbation rectangular teeth (2). The tuning block (23) is used to fine-tune the antenna operating frequency. The top of the butterfly-shaped vibrator body (1) is fixedly connected with a limiting rod (24), and the limiting rod (24) slides through the horizontal plate (20).
9. An S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 8, characterized in that, It also includes a heat dissipation hole array (25), which is located below the reflector (6) to improve heat dissipation performance.
10. An S-band rectangular toothed perturbation butterfly-shaped metal dipole antenna according to claim 9, characterized in that, It also includes reinforcing ribs (26) that connect the foam support column (5) to the reflector (6) to enhance mechanical stability.