Low-frequency broadband orthogonal antenna

Abstract

The utility model discloses a low-frequency broadband orthogonal antenna, which comprises a substrate and a pair of semicircular first radiation oscillators which are arranged above the substrate in an orthogonal manner, each first radiation oscillator comprises a first arc part and a first linear part, the first arc part is close to the substrate, the center of the first linear part is downwards provided with a slot, and the first arc part is close to the first linear part. The upper portions of the two ends of the first linear part are connected with a support, the upper end of the support is connected with a semicircular second radiation oscillator, the second radiation oscillator comprises a second arc part and a second linear part, the second linear part is connected with the support, and the second arc part is arranged above the second linear part. Compared with the prior art, the antenna has the advantages that the requirement for low-frequency broadband orientation is met through orthogonality of a group of semicircular oscillators, the cost of antenna consumables is saved on the premise that the performance is met, the bandwidth is increased by changing the distance between the bottom edge of the first radiation oscillator and the parallel ground, and meanwhile 4G low-frequency multi-frequency-band work is met.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to a low-frequency broadband orthogonal antenna. Background Technology

[0002] The existing 4G antenna structures cannot meet the needs of the market terminals. There are certain requirements for frequency band and antenna size. Electromagnetic dipole antennas have the characteristics of wide bandwidth and stable radiation performance, but these antennas have complex structures and face the problem of large antenna size.

[0003] The compact radiating structure of low-frequency broadband orthogonal antennas allows for higher integration and flexibility of loop antennas within a limited space. Secondly, low-frequency broadband orthogonal antennas have a wide bandwidth, meeting the high-speed and low-latency requirements of 5G networks. Furthermore, they possess strong anti-interference capabilities, maintaining stable communication performance in complex environments. In summary, low-frequency broadband orthogonal antennas offer significant advantages in performance, structural adaptability, and practicality. Utility Model Content

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a substrate, and a pair of orthogonally arranged semi-circular first radiating oscillators disposed above the substrate. Each first radiating oscillator includes a first arc portion and a first straight portion. The first arc portion is close to the substrate. A groove is provided downward at the center of the first straight portion. A bracket is connected above both ends of the first straight portion. A semi-circular second radiating oscillator is connected to the upper end of the bracket. The second radiating oscillator includes a second arc portion and a second straight portion. The second straight portion is connected to the bracket. The second arc portion is disposed above the second straight portion.

[0005] Furthermore, the radius of the first radiating oscillator is larger than the radius of the second radiating oscillator.

[0006] Furthermore, each of the first radiating oscillators has a rectangular mounting portion at both ends of its bottom to widen the low-frequency bandwidth.

[0007] Furthermore, the height of the mounting portion in the vertical direction is 1 / 23 of the wavelength.

[0008] Furthermore, the second straight section of the second radiating oscillator and the first straight section of the first radiating oscillator are parallel to each other.

[0009] Furthermore, the bracket is vertically connected between the first straight section and the second straight section.

[0010] Furthermore, a power feeding section is provided at the intersection of the central axis of the first radiating oscillator and the second radiating oscillator with the substrate.

[0011] Furthermore, the radius of the semicircular first radiating element is 1 / 4 wavelength of the 780MHz antenna.

[0012] Furthermore, the depth of the slot is 4 / 5 of the radius length of the semicircular first radiating oscillator.

[0013] Furthermore, the height of the bracket is 3 / 14 wavelength.

[0014] The beneficial effects of this utility model are as follows: This application satisfies the requirements of low-frequency broadband directionality by using a set of semi-circular dipoles orthogonally, saving antenna material costs while meeting performance requirements. It increases bandwidth by changing the distance between the bottom edge of the first radiating dipole and the parallel ground, while simultaneously meeting the requirements of 4G low-frequency multi-band operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the low-frequency broadband orthogonal antenna mounted on the substrate in an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of another angle low-frequency broadband orthogonal antenna structure in an embodiment of this utility model;

[0017] Figure 3 This is a diagram showing the return loss of a low-frequency broadband orthogonal antenna in an embodiment of this utility model.

[0018] Figure 4 This is a VSWR diagram of a low-frequency broadband orthogonal antenna in an embodiment of this utility model;

[0019] Figure 5 This is a diagram showing the vacuum efficiency of the low-frequency broadband orthogonal antenna in an embodiment of this utility model.

[0020] Figure 6 This is the radiation pattern of the low-frequency broadband orthogonal antenna in this embodiment of the invention;

[0021] Reference numerals: 10-First radiating oscillator, 20-Support, 30-Second radiating oscillator, 40-Slot, 50-Mounting part, 101-First arc-shaped part, 102-First straight part, 301-Second straight part, 302-Second arc-shaped part, 60-Substrate, 601-Mounting hole Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] This application provides a low-frequency broadband orthogonal antenna, addressing the problems of large antenna size and complexity in existing technologies. In this embodiment, the directions of the second radiating element relative to the first radiating element (upper, upper side, upper end, above) are defined as lower, lower side, lower end, lower.

[0024] like Figures 1-2 The following is an embodiment of this application:

[0025] The substrate 60 and a pair of orthogonally arranged semicircular first radiating oscillators 10 disposed on the substrate 60. Each first radiating oscillator 10 includes a first arc portion 101 and a first straight portion 102. The first arc portion 101 is located below the first straight portion 102, that is, in the direction close to the substrate 60. A slot 40 is provided downward at the center of the first straight portion 102. A bracket 20 is connected above both ends of the first straight portion 102. A semicircular second radiating oscillator 30 is connected to the upper end of the bracket 20. The second radiating oscillator 30 includes a second arc portion 302 and a second straight portion 301. The second straight portion 301 is connected to the bracket 20. The second arc portion 302 is located above the second straight portion 301.

[0026] Preferably, the radius of the first radiating oscillator 10 is larger than the radius of the second radiating oscillator 30, and the second straight section 301 and the first straight section 102 are parallel to each other. More preferably, in this embodiment, the bracket 20 is vertically connected between the first straight section 102 and the second straight section 301.

[0027] Each first radiating element 10 has a rectangular mounting portion 50 at both ends of its bottom. The substrate 60 has multiple mounting holes 601, and the mounting portion 50 is installed in the mounting holes 601. A secondary gradient is introduced on the basis of the gradient, and its fundamental starting point is to satisfy the principle of antenna thickening gradient. After adding the mounting portion 50, the low frequency bandwidth can be widened and the radiation pattern of the low frequency point becomes more rounded, but it will cause some lobes to be upturned. This effect can be changed by changing its area size. When the height of the mounting portion 50 is consistent with 1 / 23 wavelength, the gain will increase due to the effect of the rectangular area. At the same time, due to the change in height, the return loss at the low frequency end is enhanced. This is mainly because the increase of the antenna radiating element will widen the bandwidth after orthogonality.

[0028] A power supply section (not shown in the figure) is provided at the intersection of the central axis of a pair of first radiating oscillators 10 and second radiating oscillators 30 and the substrate 60. The position of the power supply section is at a certain distance from the first radiating oscillator 10.

[0029] The radius of the semi-circular first radiating element 10 is the length of the main frequency band of the control antenna. In this embodiment, 1 / 4 wavelength of 820MHz is used as the actual reference length of the radius. With minor modifications according to the actual situation, the length is 1 / 4 wavelength of the 780MHz antenna.

[0030] The depth of the slot 40 is 4 / 5 of the radius of the semicircular first radiating element 10. The purpose of this is to increase the height of the element and increase the orthogonal area of ​​the element, which will play a role in adjusting the antenna gain. Due to the increased height of the antenna element, the operating frequency point moves to a lower frequency band without affecting the 900MHz frequency point, and it will not form a multi-lobed phenomenon like traditional antennas.

[0031] The height of the bracket 20 is 3 / 14 wavelength. The height of the bracket 20 affects the interaction between the added second radiating element 30 and the parallel base plate. The higher the height, the smaller the effect. However, it cannot exceed a certain height. Exceeding a certain height will cause the antenna frequency to shift to a higher frequency, which will lead to antenna efficiency distortion or the phenomenon of multi-lobed antenna.

[0032] This embodiment uses a set of semi-circular dipoles orthogonally to meet the requirements of low-frequency broadband directionality, saving antenna material costs while meeting performance requirements. The bandwidth is increased by changing the distance between the bottom edge of the first radiating dipole 10 and the parallel ground, while also meeting the requirements of 4G low-frequency multi-band operation.

[0033] like Figures 3-4 As shown, the low-frequency broadband orthogonal antenna in this embodiment achieves a return loss of -10dB in the 550MHz-960MHz frequency band. Using the formula RL=-20lg [(VSWR-1) / (VSWR+1)], the VSWR at the center frequency of 880MHz is approximately 1.39, which matches the simulation results and is quite satisfactory. Similarly, it can be concluded that the VSWR in the high-frequency band can be well diverged under the action of this antenna.

[0034] like Figure 5 As shown, the antenna in this embodiment should have an efficiency of approximately 95% in a vacuum and approximately 60% in air. Figure 6 As shown, in this embodiment, the antenna has two orthogonal semicircular elements, and the simulation is in an ideal state in a vacuum, so it can be concluded that... Figure 5 The radiation pattern shows that it does not resemble petals, but rather a full apple shape, hence the name "apple pattern." This indicates that the product exhibits balanced radiation intensity in all directions within the 550MHz-960MHz frequency band, with an antenna gain of 3.15dBi. It also meets the requirements of 4G Bands 5, 6, 8, 12, 13, 17, and 28, meaning the antenna bandwidth meets 50% efficiency across the entire 550MHz-960MHz frequency band, and the directional gain meets 2dB.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The embodiments described above merely illustrate the implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A low-frequency broadband orthogonal antenna, characterized in that, include: A substrate, and a pair of orthogonally arranged semi-circular first radiating oscillators disposed above the substrate. Each first radiating oscillator includes a first arc portion and a first straight portion. The first arc portion is close to the substrate. The center of the first straight portion has a downward-facing slot. Supports are connected to the upper ends of the first straight portion. The upper end of the support is connected to a semi-circular second radiating oscillator. The second radiating oscillator includes a second arc portion and a second straight portion. The second straight portion is connected to the support. The second arc portion is disposed above the second straight portion.

2. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The radius of the first radiating oscillator is greater than the radius of the second radiating oscillator.

3. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: Each of the first radiating oscillators has rectangular mounting portions at both ends of its bottom to widen the low-frequency bandwidth.

4. The low-frequency broadband orthogonal antenna according to claim 3, characterized in that: The height of the mounting part in the vertical direction is 1 / 23 of the wavelength.

5. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The second linear portion of the second radiating oscillator and the first linear portion of the first radiating oscillator are parallel to each other.

6. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The bracket is vertically connected between the first straight section and the second straight section.

7. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: A power supply section is provided at the intersection of the central axis of the first radiating oscillator and the second radiating oscillator with the substrate.

8. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The radius of the first radiating element of the semicircle is 1 / 4 wavelength of the 780MHz antenna.

9. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The depth of the slot is 4 / 5 of the radius of the semicircular first radiating oscillator.

10. The low-frequency broadband orthogonal antenna according to claim 1, characterized in that: The height of the bracket is 3 / 14 of the wavelength.

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