WiFi gain antenna

Abstract

This utility model relates to the field of communication technology and discloses a WiFi gain antenna, including a substrate and a feeding unit disposed on the substrate. The substrate includes a first surface and a second surface opposite to each other. Transmission lines and two sets of radiating units are respectively provided on the first surface and the second surface. The two sets of radiating units on the same plane are arranged along the Y-axis and are connected by transmission lines. Each radiating unit includes two radiating arms connected to the corresponding transmission line. The radiating arms of the same radiating unit are arranged along the X-axis and symmetrically disposed on both sides of the transmission line. The radiating arms of the first surface and the second surface do not overlap in the projection direction of the first surface, so as to provide a gain antenna that helps to miniaturize WiFi components, can be built into WiFi components, and ensures signal range.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, specifically to a WiFi gain antenna. Background Technology

[0002] With the rapid development of the Internet of Things (IoT) in the home, terminal products such as routers, converged gateways, and CPEs that support WiFi wireless internet access have become indispensable infrastructure for every household. Currently, common WiFi antennas on the market mainly employ several technical solutions, including all-PCB antennas. Their advantage is simple manufacturing processes, but the high dielectric loss of commonly used PCB substrates leads to generally low antenna efficiency and gain. Furthermore, fluctuations in the consistency of PCB board parameters during mass production can severely affect the stability of antenna performance. Secondly, copper tube antennas use metal radiators, resulting in lower loss, but they suffer from complex manufacturing processes, higher costs, and difficulty in ensuring consistency during mass production. Some existing solutions have a limitation: the antenna structure is relatively large. As terminal product designs increasingly trend towards miniaturization and integration, the available space for antennas is becoming increasingly limited. For example, Chinese patent document CN219393686U discloses an anti-interference high-gain WIFI antenna. By setting a connecting sleeve, it can ensure that the gain component can change angle during use, thereby enabling good stability and a larger coverage area when transmitting WIFI signals. However, external antennas usually need to protrude from the device shell, which destroys the overall aesthetics of the device; while building a large antenna inside will take up too much space, which contradicts the design concept of miniaturization of the device. Utility Model Content

[0003] The present invention aims to provide a WiFi gain antenna that facilitates the miniaturization of WiFi components, can be built into WiFi components, and ensures signal range.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a WiFi gain antenna, including a substrate and a feeding unit disposed on the substrate. The substrate includes a first surface and a second surface opposite to each other. The horizontal direction of the first surface is the X-axis direction, and the vertical direction of the first surface is the Y-axis direction. Transmission lines and two sets of radiating units are respectively provided on the first surface and the second surface. The two sets of radiating units on the same plane are arranged along the Y-axis direction and are connected by transmission lines. Each radiating unit includes two radiating arms connected to the corresponding transmission line. The radiating arms of the same radiating unit are arranged along the X-axis direction and symmetrically disposed on both sides of the transmission line. The radiating arms of the first surface and the second surface do not overlap in the vertical projection direction of the first surface.

[0005] The beneficial effects of this plan are:

[0006] By arranging multiple sets of radiating elements, the equivalent radiating area is increased, improving the antenna's radiation efficiency and gain performance, thus meeting the long-distance coverage requirements of WiFi signals within a limited volume. The radiating arms of the first and second surfaces do not overlap in the projection direction of the first surface, avoiding coupling that would cause the electromagnetic wave radiation energy to become uneven on the horizontal plane. The staggered projection design allows the radiators on both sides to work independently and symmetrically, jointly synthesizing a perfect omnidirectional beam. Without changing the physical dimensions, the antenna size can be further reduced to meet the target frequency.

[0007] This invention provides an omnidirectional, high-gain antenna with a small size that can meet the signal coverage requirements of terminal products. Because of its small size, the terminal product design can reserve antenna space inside the device, which can satisfy coverage performance while making the device more aesthetically pleasing. Compared with conventional external antenna solutions, the miniaturized antenna can be placed inside the terminal product, eliminating the need for an antenna jacket and reducing antenna manufacturing processes, resulting in lower costs.

[0008] Preferably, as an improvement, the spacing between the two sets of radiating elements on the same surface in the Y direction is half the wavelength of the antenna's operating frequency band.

[0009] The beneficial effects are: it helps the electromagnetic waves generated by the radiating element to be superimposed in phase in the far field region, making the signal stronger in the horizontal direction and propagating farther, thereby improving the antenna gain, and at the same time helping its horizontal plane radiation pattern to maintain an ideal omnidirectional shape that is very close to a circle.

[0010] Preferably, as an improvement, a metallized through-hole is provided at the bottom of the substrate surface. The power supply unit includes a first power supply part, a second power supply part, and a power supply tube for connecting and conducting the first power supply part and the second power supply part. The power supply tube is inserted into the metallized through-hole. The first power supply part and the second power supply part are respectively disposed on the first surface and the second surface. The transmission line on the first surface is connected to the power supply tube through the first power supply part, and the transmission line on the second surface is connected to the power supply tube through the second power supply part.

[0011] The beneficial effects are as follows: by combining the metallized vias with the feed tubes, the transmission lines on the first and second surfaces can be electrically interconnected, ensuring that the dual-sided radiating units work under the same power supply, thus enhancing the consistency and stability of the overall radiation; by arranging the feed tubes in the metallized vias, three-dimensional wiring is achieved, enabling the antenna to achieve complex dual-sided radiating designs on a smaller substrate area, which meets the requirements of miniaturization.

[0012] Preferably, as an improvement, the transmission lines on the first surface, the transmission lines on the second surface, and the substrate together constitute a microstrip line, and the microstrip line impedance is 50 ohms.

[0013] The beneficial effects are as follows: the microstrip line impedance is set to 50 ohms, which matches the impedance of common WiFi RF excitation sources (50 ohms), thereby avoiding impedance mismatch problems during transmission, improving signal coupling efficiency, reducing the energy loss of the surface current of the excitation during antenna transmission, and increasing the antenna radiation efficiency parameter, allowing more energy to be radiated into the air.

[0014] Preferably, as an improvement, the radiating arms are of equal length in the Y direction.

[0015] The beneficial effects are: the radiating arms are of equal length in the Y direction, which makes the current distribution on the two radiating arms remain balanced, thereby forming a symmetrical radiation field and improving the antenna's radiation pattern characteristics.

[0016] Preferably, as an improvement, the thickness of the substrate is 0.6 mm.

[0017] The beneficial effects are: with a thickness of 0.6mm, under the parameter conditions of commonly used PCB media, it can better match the target operating frequency, making the antenna resonant point more accurate and the stability higher.

[0018] Preferably, as an improvement, the substrate is made of FR-4 material with a dielectric constant of 4.3 and a permeability of 1.0. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first surface antenna structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the second surface antenna structure of this utility model;

[0021] Figure 3 The simulation example of the antenna of this utility model shows the S-parameter results.

[0022] Figure 4 The simulation example of the antenna of this utility model shows the antenna efficiency parameter results.

[0023] Figure 5 The simulation example of the antenna of this utility model shows the gain versus frequency curve.

[0024] Figure 6 This is a simulation example of the 3D radiation pattern of the antenna of this utility model.

[0025] The reference numerals in the accompanying drawings include: first surface 1, second surface 2, radiating arm 3, transmission line 4, metallized through hole 5, first feed section 6, second feed section 7, and spacing between the two sets of radiating elements 8. Detailed Implementation

[0026] The following detailed description is provided through specific implementation methods and examples:

[0027] The preferred embodiments of this utility model are basically as shown in the appendix. Figure 1-6 As shown, Figure 1 and Figure 2 The WiFi gain antenna shown includes a substrate and a feeding unit disposed on the substrate. The substrate includes a first surface 1 and a second surface 2 facing each other. The horizontal direction of the first surface 1 is the X-axis direction, and the vertical direction of the first surface 1 is the Y-axis direction. The thickness of the substrate is 0.6 mm. Transmission lines 4 and two sets of radiating units are respectively provided on the first surface 1 and the second surface 2. The two sets of radiating units on the same plane are arranged along the Y-axis direction and connected by transmission lines 4. Each radiating unit includes two radiating arms 3 connected to the corresponding transmission line 4. The radiating arms 3 of the same radiating unit are arranged along the X-axis direction and symmetrically disposed on both sides of the transmission line 4. The radiating arms 3 of the first surface 1 and the second surface 2 do not overlap in the vertical projection direction of the first surface. To make the structure simple and reliable, the preferred embodiment of this invention is that the radiating arms 3 are of equal length in the Y-direction, so that the current distribution on the two radiating arms 3 remains balanced, thereby forming a symmetrical radiation field and improving the antenna's radiation pattern characteristics.

[0028] By arranging multiple sets of radiating elements, the equivalent radiating area is increased, improving the antenna's radiation efficiency and gain performance, thus enabling long-distance WiFi signal coverage within a limited volume. The radiating arms 3 of the first surface 1 and the second surface 2 do not overlap in the projection direction of the first surface, avoiding coupling that would cause the electromagnetic wave radiation energy to become uneven on the horizontal plane. The staggered projection design allows the radiators on both sides to work independently and symmetrically, jointly synthesizing a perfect omnidirectional beam. Without changing the physical dimensions, the antenna size can be further reduced to meet the target frequency.

[0029] This invention provides an omnidirectional, high-gain antenna with a small size that can meet the signal coverage requirements of terminal products. Because of its small size, the terminal product design can reserve antenna space inside the device, which can satisfy coverage performance while making the device more aesthetically pleasing. Compared with conventional external antenna solutions, the miniaturized antenna can be placed inside the terminal product, eliminating the need for an antenna jacket and reducing antenna manufacturing processes, resulting in lower costs.

[0030] To ensure signal dispersion, the preferred embodiment of this invention is that the spacing between the two sets of radiating elements on the same surface in the Y direction (the spacing 8 between the two sets of radiating elements) is half the wavelength of the antenna's operating frequency band. This helps the electromagnetic waves generated by the radiating elements to be superimposed in phase in the far field region, making the signal stronger in the horizontal direction and propagating further, thereby improving the antenna gain. At the same time, it helps the horizontal plane radiation pattern to maintain an ideal omnidirectional shape that is very close to a circle. To ensure a simple, reliable, and easy-to-assemble structure, the preferred embodiment of this invention features a metallized through-hole 5 at the bottom of the substrate surface. The feeding unit includes a first feeding section 6, a second feeding section 7, and a feeding tube for connecting and conducting the first feeding section 6 and the second feeding section 7. The feeding tube is inserted into the metallized through-hole 5. The first feeding section 6 and the second feeding section 7 are respectively disposed on the first surface 1 and the second surface 2. The transmission line 4 on the first surface 1 is connected to the feeding tube through the first feeding section 6, and the transmission line 4 on the second surface 2 is connected to the feeding tube through the second feeding section 7. Through the cooperation of the metallized through-hole 5 and the feeding tube, the transmission lines 4 on the first surface 1 and the second surface 2 can be electrically interconnected, ensuring that the dual-sided radiating unit operates under the same power supply, thus enhancing the consistency and stability of the overall radiation. By arranging the feeding tube within the metallized through-hole 5, three-dimensional wiring is achieved, enabling the antenna to achieve a complex dual-sided radiating design on a smaller substrate area, meeting the requirements of miniaturization.

[0031] To ensure signal transmission performance, the preferred embodiment of this invention is as follows: the transmission line 4 on the first surface 1, the transmission line 4 on the second surface 2, and the substrate together constitute a microstrip line. The microstrip line impedance is 50 ohms, which matches the impedance of common WiFi RF excitation sources (50 ohms). This avoids impedance mismatch during transmission, improves signal coupling efficiency, reduces energy loss of the excitation surface current during antenna transmission, and increases the antenna radiation efficiency parameter, allowing more energy to be radiated into the air.

[0032] To verify the antenna concept of the preferred embodiment of this utility model, physical simulation and electromagnetic field software simulation were performed, as detailed below:

[0033] Specifically, the antenna dimensions are 58mm × 19.5mm × 0.6mm, the substrate material is FR-4, the dielectric constant is 4.3, and the permeability is 1.0. The specific simulation results are as follows:

[0034] Please see Figure 3 , Figure 3 The simulation results of the S-parameters for a simulation example of the antenna are shown in the figure. Specifically, [the figure is derived from...]. Figure 3 It can be seen that the S11 of the antenna is less than -10dB in the 5.15GHz-5.85GHz frequency band; please refer to [link / reference]. Figure 4 , Figure 4 The simulation example of the antenna of this utility model shows the antenna efficiency parameter results; please refer to [the provided text]. Figure 5 As shown in the figure, the antenna gain is approximately 5 dBi. This high gain characteristic helps in antenna miniaturization while enabling terminal products to achieve wider coverage. Figure 3 , Figure 4 , Figure 5 It can be seen that the passive parameters of the antenna in the 5.15GHz-5.85GHz frequency band meet the requirements (log<-10), the simulation efficiency of the example antenna is >-1.2dB, and the antenna energy conversion efficiency is relatively high; please refer to Figure 6 , Figure 6 This is a simulation example of the 3D field pattern radiation pattern of the antenna of this utility model.

[0035] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A WiFi gain antenna, comprising a substrate and a feeding unit disposed on the substrate, the substrate comprising a first surface (1) and a second surface (2) opposite to each other, characterized in that: Transmission lines (4) and two sets of radiation units are respectively provided on the first surface (1) and the second surface (2). The horizontal direction of the first surface (1) is the X-axis direction, and the vertical direction of the first surface (1) is the Y-axis direction. The two sets of radiation units on the same plane are arranged along the Y-axis direction and are connected by transmission lines (4). Each radiation unit includes two radiation arms (3) connected to the corresponding transmission line (4). The radiation arms (3) of the same radiation unit are arranged along the X-axis direction and symmetrically arranged on both sides of the transmission line (4). The radiation arms (3) of the first surface (1) and the second surface (2) do not overlap in the vertical projection direction of the first surface (1).

2. The WiFi gain antenna of claim 1, wherein: The spacing between the two sets of radiating elements on the same surface in the Y direction is half the wavelength of the antenna's operating frequency band.

3. The WiFi gain antenna of claim 1, wherein: The substrate has a metallized through hole (5) at the bottom of the surface. The power supply unit includes a first power supply part (6), a second power supply part (7), and a power supply tube for connecting and conducting the first power supply part (6) and the second power supply part (7). The power supply tube is inserted into the metallized through hole (5). The first power supply part (6) and the second power supply part (7) are respectively disposed on the first surface (1) and the second surface (2). The transmission line (4) of the first surface (1) is connected to the power supply tube through the first power supply part (6), and the transmission line (4) of the second surface (2) is connected to the power supply tube through the second power supply part (7).

4. The WiFi gain antenna of claim 1, wherein: The transmission line (4) on the first surface (1), the transmission line (4) on the second surface (2), and the substrate together constitute a microstrip line with an impedance of 50 ohms.

5. The WiFi gain antenna of claim 1, wherein: The radial arm (3) is of equal length in the Y direction.

6. The WiFi gain antenna of claim 1, wherein: The thickness of the substrate is 0.6 mm.

7. The WiFi gain antenna of claim 1, wherein: The substrate is made of FR-4 material with a dielectric constant of 4.3 and a permeability of 1.0.

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