Antenna and antenna preparation method

Abstract

The invention discloses an antenna and an antenna preparation method. The antenna is printed on a dielectric plate and comprises a feeding point, a first grounding point, a main radiating body and a first parasitic branch knot, and the feeding point is used for receiving current transmitted by a mainboard and transmitting the current to the main radiating body; the main radiator is connected with the feeding point and is used for generating a first resonance frequency band based on current; the first parasitic branch knot is connected with the first grounding point and is used for generating coupling with the main radiator to generate a second resonance frequency band. According to the invention, the technical problems of small resonance coverage range and large size of the printed antenna in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an antenna and a method for preparing the antenna. Background Art

[0002] With the popularization of LTE (Long-Term Evolution) technology, the use of LTE networks for mobile Internet access is becoming increasingly popular, and portable LTE routing products (Mobile Wi-Fi: MIFI) that can provide LTE network sharing for multiple users are also becoming popular. Users can access the Internet anytime and anywhere through MIFI products without relying on public WIFI, so that they can use network services more flexibly and freely. With the popularization of 5G technology, the technical requirements for MIFI products are also increasing.

[0003] At present, MIFI products usually use FPC (Flexible Printed Circuit) antennas or LDS (Laser Direct Structuring) antennas. However, the above antennas need to be connected to the motherboard through a bracket, which increases the cost of the product. In addition, due to their high cross-section, the product thickness is large, which affects the product experience. In addition, the current printed antenna has a small resonant frequency coverage range and cannot meet the resonant frequency range required by 5G technology.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiments of the present invention provide an antenna and a method for preparing the antenna, so as to at least solve the technical problems of small resonance coverage and large size of the printed antenna in the related art.

[0006] According to one aspect of an embodiment of the present invention, there is provided an antenna, which is printed on a dielectric board and includes: a feeding point, a first grounding point, a main radiator and a first parasitic branch, wherein the feeding point is used to receive current transmitted from the main board and transmit the current to the main radiator; the main radiator is connected to the feeding point, and is used to generate a first resonant frequency band based on the current; the first parasitic branch is connected to the first grounding point, and is used to couple with the main radiator to generate a second resonant frequency band.

[0007] Optionally, the main radiator includes a plurality of main radiator branches, wherein the plurality of main radiator branches are used to generate a plurality of resonant frequency bands, and the plurality of resonant frequency bands include the first resonant frequency band.

[0008] Optionally, the multiple resonant frequency bands include: a medium frequency band, a high frequency band, and an ultra-high frequency band.

[0009] Optionally, the plurality of main radiator branches are meandering wirings.

[0010] Optionally, the first parasitic branch is a meandering trace.

[0011] Optionally, the second resonance frequency band generated by the first parasitic branch is a low frequency band.

[0012] Optionally, the first parasitic branch is a structure of multiple circuitous paths, wherein the multiple circuitous paths are used to form a low-frequency multi-resonance mode.

[0013] Optionally, the antenna further includes a second parasitic branch grounded through a second grounding point, and configured to adjust the frequency of the second resonant frequency band to obtain the low-frequency multi-resonance mode.

[0014] Optionally, the first resonant frequency band is determined based on at least one of: the shape and size of the main radiator, and the width of one or more gaps formed based on the shape and size of the main radiator; and / or the second resonant frequency band is determined based on at least one of: the shape of the main radiator, the size of the main radiator, the width of one or more gaps formed based on the shape and size of the main radiator, the shape of the first parasitic branch, the size of the first parasitic branch, the width of one or more gaps formed based on the shape and size of the first parasitic branch, and the width of one or more gaps formed between the main radiation and the first parasitic branch.

[0015] According to another aspect of the embodiments of the present invention, a PCB board is further provided.

[0016] According to another aspect of an embodiment of the present invention, a mobile routing device is provided.

[0017] According to another aspect of an embodiment of the present invention, a method for preparing an antenna is also provided, including: preparing a main radiator for generating a first resonant frequency band, and a first parasitic branch for generating a second resonant frequency band; printing the main radiator on a dielectric board, and connecting the main radiator to a feeding point on the dielectric board, wherein the feeding point is used to receive current transmitted from the main board and transmit the current to the main radiator to generate a first resonant frequency band; printing the first parasitic branch on the dielectric board, and connecting the first parasitic branch to a first grounding point, so that the first parasitic branch is coupled with the main radiator to generate a second resonant frequency band.

[0018] In an embodiment of the present invention, an antenna and an antenna preparation method are adopted. The antenna is printed on a dielectric board, including a feeding point, a first grounding point, a main radiator and a first parasitic branch. The feeding point is used to receive the current transmitted from the main board and transmit the current to the main radiator; the main radiator is connected to the feeding point, and is used to generate a first resonant frequency band based on the current; the first parasitic branch is connected to the first grounding point, and is used to couple with the main radiator to generate a second resonant frequency band, thereby achieving the purpose of the printed antenna generating multiple resonant frequency bands, thereby realizing the technical effect that the resonant frequency band of the printed antenna covers low frequency to ultra-high frequency, thereby solving the technical problems of small resonant coverage and large size of the printed antenna in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of an antenna provided according to an embodiment of the present invention;

[0021] Figure 2 It is a physical schematic diagram of an FPC antenna and an LDS antenna for comparison with the antenna provided in the embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of the combination of an antenna and a mainboard provided according to an optional embodiment of the present invention;

[0023] Figure 4 is a schematic diagram of the relationship between the antenna input reflection coefficient and the frequency provided in an optional embodiment of the present invention;

[0024] Figure 5 is a schematic diagram of an optional shape of an antenna provided according to an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of an antenna including a second parasitic branch provided according to an embodiment of the present invention;

[0026] Figure 7 is a schematic diagram of various slots in an antenna provided according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of the process of the antenna preparation method provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] According to an embodiment of the present invention, an antenna is also provided. It should be noted that although the antenna structure is shown in the design diagram, in some cases, the antenna shown or described may be designed with a structure different from that shown or described herein.

[0031] Figure 1 is a schematic diagram of an antenna provided according to an embodiment of the present invention, such as Figure 1 As shown, the antenna is printed on a dielectric board 3 , and includes a feeding point 1 , a first grounding point 2 , a main radiator 4 and a first parasitic branch 21 .

[0032] The antenna is printed on the dielectric plate 3, which can realize antenna miniaturization, reduce costs and improve antenna performance.

[0033] For example, the size of the printed antenna in this design can be 0.15λ, where λ is the wavelength of the antenna, which is smaller than the size of the conventional inverted-F antenna (0.25λ). The inverted-F antenna (IFA) is a deformed structure of the monopole antenna, and its shape is similar to an inverted letter "F". In addition, the antenna is printed on a dielectric board connected to the motherboard, does not occupy space height, and has a smaller profile height than FPC, LDS and other antennas, and can be used in the design of mobile communication antennas for most MIFI products. Figure 2 Schematic diagram of an FPC antenna and an LDS antenna for comparison with the antenna provided in the embodiment of the present invention. Figure 2As shown in the figure, the FPC antenna mounts the flexible antenna PCB on a plastic bracket, and the LDS antenna plates the antenna on the bracket through laser engraving technology. The above two antenna brackets are fixed to the mainboard by buckles or screws, and the antenna is fed by the metal spring on the mainboard. Therefore, there is a problem of increasing the thickness of the product, which affects the product experience. For example, the antenna adopts a printed solution to save the material cost of the bracket and the corresponding assembly cost. The printed antenna also avoids the consistency problem caused by the antenna assembly error, which can greatly improve the consistency problem of the whole machine and enhance the product performance. Similarly, the routing shape and size of the printed antenna can change its impedance characteristics, thereby changing the matching degree with the transmission line. Good matching can reduce the energy loss in the transmission process and improve the radiation efficiency. The overall efficiency can reach 40% to 70%, which is 10% higher than the efficiency of FPC and LDS antennas (30% to 60%).

[0034] Feeding point 1 is used to receive the current transmitted from the mainboard and transmit the current to the main radiator 4.

[0035] In this structure, the feeding point is connected to the main radiator, and the high-frequency oscillating current generated by the transmitter is transmitted from the RF microstrip line on the mainboard to the feeding point. The high-frequency oscillating current carries the information to be transmitted (such as audio, video, data, etc.). Then the high-frequency oscillating current is transmitted to the main radiator to excite the resonant mode, wherein the RF microstrip line is a transmission line, which is composed of a single conductor and is located on the surface of the mainboard. The current is transmitted from the mainboard to the radiator. The use of RF microstrip lines can achieve a more flexible design and improve the performance of the antenna. In addition, the resonant mode of the antenna refers to an efficient working state of the antenna at the target frequency, which determines that the antenna can efficiently radiate or receive electromagnetic waves at the target frequency. The above target frequency is the resonant frequency. For example, the resonant frequency of the antenna can cover low frequency (790~960MHz), medium frequency (1710~2170MHz), high frequency (2300~2690MHz) and ultra-high frequency (3300~4200MHz). It should be noted that the resonant frequency range covered by the above antenna is only an example.

[0036] The main radiator 4 is connected to the feeding point 1 and is used to generate a first resonant frequency band based on the current.

[0037] In this structure, the main radiator is the main component of the antenna. The main radiator converts the current signal into electromagnetic waves and radiates them into space. The main radiator can be in a variety of shapes, such as straight lines, broken lines, curves, etc. It can also be made of metals (such as copper, aluminum) or alloys with good electrical conductivity. The shape and design of the main radiator can vary depending on the type, purpose and working frequency band of the antenna. Main radiators of different shapes and sizes can produce different resonant frequencies, so the antenna can work efficiently in different frequency bands. For example, the resonant frequency generated by the main radiator can cover medium frequency (1710~2170MHz), high frequency (2300~2690MHz) and ultra-high frequency (3300~4200MHz).

[0038] The first parasitic branch 21 is connected to the first grounding point 2 and is used for coupling with the main radiator 4 to generate a second resonant frequency band.

[0039] In this structure, the parasitic branch is a grounded branch structure in the antenna, which is not directly connected to the antenna feeder. Therefore, the current transmitted from the mainboard does not flow through the parasitic branch, but the parasitic branch generates an induced current through electromagnetic coupling with the main radiator, generating a second resonant frequency band, thereby expanding the frequency band range of the antenna. Electromagnetic coupling is the process of two or more electromagnetic systems interacting and exchanging energy. For example, when the current passes through the main radiator, an electromagnetic field is generated around the main radiator. After the first parasitic branch generates an induced current based on the electromagnetic field around the main radiator, it will generate its own electromagnetic field based on the induced current, thereby generating a low-frequency resonant frequency band (790-960MHz).

[0040] Through the above antenna, the purpose of generating multiple resonant frequency bands of the printed antenna is achieved, thereby realizing the technical effect that the resonant frequency band of the printed antenna covers low frequency to ultra-high frequency, thereby solving the technical problems of small resonant coverage range and large size of the printed antenna in related technologies.

[0041] Figure 3 is a schematic diagram of the combination of an antenna and a mainboard according to an optional embodiment of the present invention. Figure 3 As shown, the current is fed into the antenna from the antenna feeding point 1 through the RF microstrip line on the mainboard 3 and generates corresponding resonance, and the antenna grounding point 2 is used for grounding. Among them, the shape of the mainboard is not limited and can be designed differently according to actual needs. For example, a rectangular mainboard can provide a larger area to accommodate antenna elements and circuits; a circular mainboard is more visually beautiful and can provide better heat dissipation performance; a diamond-shaped mainboard can be used to achieve a specific radiation pattern; a fishbone-shaped mainboard can be used to increase the gain of the antenna; and a spiral mainboard can be used to achieve broadband or multi-band communications.

[0042] Figure 4is a schematic diagram of the relationship between the antenna input reflection coefficient and the frequency according to an optional embodiment of the present invention. Figure 4 As shown, the input reflection coefficient (S 11 ) refers to a specific transmission parameter that describes the ratio of the signal power reflected from the antenna port to the input signal power. It is measured in dB and is usually used to evaluate the matching of the antenna, that is, the matching of the antenna to the RF microstrip line. The calculation formula can be Among them, P r is the reflected signal power, P i is the input signal power. S 11 The parameter ranges from -∞ to 0dB. Ideally, a perfectly matched antenna would have S 11 = -∞dB (i.e. no signal reflection). However, in practical applications, S 11 Usually close to 0dB, indicating a certain amount of signal reflection feedback line, S 11 The smaller it is (i.e. the closer it is to -∞), the less energy is reflected and the more energy is used for transmission, and the higher the efficiency of the antenna.

[0043] As an optional embodiment, the main radiator includes a plurality of main radiator branches, wherein the plurality of main radiator branches are used to generate a plurality of resonant frequency bands, and the plurality of resonant frequency bands include the first resonant frequency band.

[0044] Optionally, the main radiator may include a plurality of main radiator branches, wherein the size of the main radiator branches, such as length and width, has a direct effect on the resonant frequency of the antenna. Generally speaking, the larger the size of the main radiator branches, the lower the resonant frequency; conversely, the smaller the size, the higher the resonant frequency. Similarly, the shape of the main radiator branches will also affect the resonant frequency. Different shapes lead to different propagation paths and modes of current in the radiator, thereby generating different resonant frequencies. Different branches have different lengths and shapes, so resonant modes of different frequencies can be excited to generate multiple resonant frequencies. Figure 5 is a schematic diagram of an optional shape of an antenna provided according to an embodiment of the present invention, such as Figure 5 As shown, the main radiator 4 may include two main radiator branches 41 and 42. The two main radiator branches have different lengths and shapes, and thus generate different resonant frequencies. Figure 5As shown, the length of the main radiator branch 41 is less than the length of the main radiator branch 42, so the resonant frequency generated by the main radiator branch 41 is greater than the resonant frequency generated by the main radiator branch 42, and the main radiator branch 41 and the main radiator branch 42 are both C-shaped, but the two are in opposite directions, so the current propagation paths in the two are different, and the resonant frequencies generated based on the current propagation paths are also different. The main radiator branch 41 can be used to generate high frequency (2300~2690MHz) and ultra-high frequency (3300~4200MHz) resonant frequency bands, and the main radiator branch 42 can be used to generate medium frequency (1710~2170MHz) resonant frequency bands. It should be noted that the resonant frequency generated by the main radiator is not limited to the three frequency bands of medium frequency, high frequency and ultra-high frequency mentioned above. According to the needs of actual applications, the number, shape and length of the main radiators can be adjusted to achieve coverage of the target resonant frequency band range.

[0045] As an optional embodiment, the multiple resonant frequency bands include: a medium frequency band, a high frequency band, and an ultra-high frequency band.

[0046] Optionally, the range of the mid-frequency band, high-frequency band and ultra-high frequency band can be divided according to the needs of mobile communication frequency bands. Among them, the range of the ultra-high frequency band can meet the requirements of 5G mobile communication technology. It should be noted that the above-mentioned mid-frequency band, high-frequency band, and ultra-high frequency band are relative, and there are many possibilities for the corresponding frequency band division. For example, the frequency band range can also be simply and roughly divided. For example, between 1700MHz and 2200MHz, or a small range of fluctuations above and below can be considered to belong to the mid-frequency band; between 2300MHz and 2700MHz, or a small range of fluctuations above and below can be considered to belong to the high frequency band; between 3000MHz and 5000MHz, or a small range of fluctuations above and below can be considered to belong to the ultra-high frequency band.

[0047] As an optional embodiment, the plurality of main radiator branches are bent wirings.

[0048] Optionally, the branches of the main radiator can be bent and routed. For example, the branches of the main radiator can be in a C-shape, a U-shape, a T-shape, a B-shape, and a J-shape. The shape of the bent route can be selected in different ways according to the actual antenna design requirements. Through different bent route shapes, the antenna size can be further compressed, and the antenna can be further miniaturized, thereby saving product costs. For example, Figure 5 As shown, the main radiator branch 41 and the main radiator 42 are both arranged in a C-shape, which further reduces the antenna area.

[0049] As an optional embodiment, the first parasitic branch is a meandering trace.

[0050] Optionally, the first parasitic branch is brought close to the main radiator through a bent line, thereby generating electromagnetic coupling, and by adjusting the length and shape of the first parasitic branch, a resonance in the required low-frequency band is generated, a low-frequency multi-resonance mode is achieved, and the bandwidth of the low-frequency band is expanded. The shape of the bent line of the first parasitic branch can be adapted to the main radiator. The more the shape of the bent line of the first parasitic branch is adapted to the shape of the line of the main radiator, the better the coupling effect. For example, Figure 5 As shown, the first parasitic branch 21 is a T-shaped routing line, which is adapted to the main radiator 4 through a bent structure to form a coupling effect, thereby generating a low-frequency band.

[0051] As an optional embodiment, the second resonance frequency band generated by the first parasitic branch is a low frequency band.

[0052] Optionally, in order to meet the requirements of conventional mobile communication frequency bands, in addition to the above-mentioned medium frequency band, high frequency band and ultra-high frequency band, the antenna should also generate low frequency resonance. For example, the second resonance frequency band generated by the first parasitic branch of the antenna is a low frequency band of 790-960 MHz.

[0053] As an optional embodiment, the first parasitic branch is a structure of multiple circuitous paths, wherein the multiple circuitous paths are used to form a low-frequency multi-resonance mode.

[0054] Optionally, the first parasitic branch is matched with the main radiator through multiple circuitous paths, thereby generating a coupling effect, thereby forming a low-frequency multi-resonance mode. Among them, the low-frequency multi-resonance mode refers to the phenomenon that the antenna can support multiple resonance points in the low-frequency band. These resonance points can correspond to the state where the antenna achieves optimal radiation or receiving efficiency at different frequencies. The multi-resonance mode can expand the working bandwidth of the antenna, so that the antenna can maintain a higher radiation efficiency in a wider frequency range. A variety of structures and technologies can be used to realize the low-frequency multi-resonance mode. For example, the multi-resonance mode of the antenna can be excited by loading gaps, short-circuit pins and other technologies, or the multi-resonance characteristics can be realized by designing an antenna structure with multiple radiating elements or resonant elements.

[0055] As an optional embodiment, the antenna further includes a second parasitic branch grounded through a second grounding point, and is used to adjust the frequency of the second resonant frequency band to obtain the low-frequency multi-resonance mode.

[0056] Optionally, the second parasitic branch node is coupled with the first parasitic branch node, and the frequency of the second resonant frequency band can be adjusted by adjusting the size and shape of the second parasitic branch node. The first parasitic branch node generates an induced current by coupling with the main radiator, and resonance can be generated on the first parasitic branch node based on the frequency of the induced current. However, the resonant frequency band generated above may not be within the resonant frequency band range required by the target. For example, the second resonant frequency band required by the target may be 790-960 MHz, but the resonant frequency band generated by the first parasitic branch node may have deviations. Therefore, the resonant frequency band can be adjusted by coupling the second parasitic branch node with the first parasitic branch node, so that the resonant frequency band is within the target resonant frequency band range, and resonance can be generated on the first parasitic branch node, so that the electromagnetic wave can be effectively propagated. Figure 6 is a schematic diagram of an antenna including a second parasitic branch according to an embodiment of the present invention, such as Figure 6 As shown, the second parasitic branch 22 is connected to the grounding point 2, and is located near the first parasitic branch 21, and can be coupled with the first parasitic branch 21 to adjust the resonant frequency band generated by the first parasitic branch. It should be noted that the parasitic branches of the antenna are not limited to the first parasitic branches and the second parasitic branches mentioned above. According to the requirements of the actual application, one or more parasitic branches can be used to generate multiple resonant frequencies based on the electromagnetic coupling between the main radiator and the parasitic branches and the parasitic branches and each other, and the multiple resonant frequencies are adjusted to the target frequency range, wherein the target frequency range is determined based on the needs of the actual application and can be any interval between 790 and 4200 MHz.

[0057] As an optional embodiment, the first resonant frequency band is determined based on at least one of: the shape and size of the main radiator, and the width of one or more gaps formed based on the shape and size of the main radiator; and / or the second resonant frequency band is determined based on at least one of: the shape of the main radiator, the size of the main radiator, the width of one or more gaps formed based on the shape and size of the main radiator, the shape of the first parasitic branch, the size of the first parasitic branch, the width of one or more gaps formed based on the shape and size of the first parasitic branch, and the width of one or more gaps formed between the main radiation and the first parasitic branch.

[0058] Optionally, the first resonant frequency band and the second resonant frequency band refer to the frequency at which the antenna can achieve the best radiation or receiving efficiency, which is determined by multiple factors. For example, the resonant frequency is related to the size of the radiator and the parasitic branches. Longer branches can correspond to lower resonant frequencies, while shorter branches can correspond to higher resonant frequencies. For another example, the resonant frequency is related to the shape of the radiator and the parasitic branches. Different shapes and structures can cause electromagnetic waves to propagate and reflect in different ways inside the antenna, thereby affecting the resonant frequency. Similarly, the gap width between different branches can also determine the resonant frequency. The difference in gap width can lead to the strength of the coupling between the main radiator and the parasitic branches, thereby affecting the resonant frequency.

[0059] Among them, the gap between the main radiator, the first parasitic branch and the second parasitic branch is an insulating structure itself, but the coupling effect between the main radiator, the first parasitic branch and the second parasitic branch can be affected by changing the width of the gap. For example, the wider the gap, the weaker the coupling effect, and the narrower the gap, the stronger the coupling effect. Moderate coupling can ensure that the interaction between the two resonant points is neither too strong nor too weak, thereby achieving optimal impedance matching. Impedance matching between the various structures of the antenna can reduce signal reflections and energy losses caused by mismatching, help broaden the working bandwidth of the antenna, and enable the antenna to maintain good performance over a wider frequency range. Figure 7 Schematic diagram of various slots in an antenna according to an embodiment of the present invention. Figure 7 As shown, the gap 401 is a gap formed by the main radiator branch 41 itself through the bending routing, the gap 402 is a gap formed by the main radiator branch 42 itself through the bending routing, the gap 403 is a gap between the main radiator branch 42 and the first parasitic branch 21, and the gap 404 is a gap between the main radiator 4 and the first parasitic branch 21 near the feeding point 1 and the grounding point 2. The width of the gap can determine the effect of the coupling effect, and then adjust the impedance matching between the main radiator branch 41, the main radiator branch 42, the first parasitic branch 21 and the second parasitic branch 22.

[0060] In an embodiment of the present invention, the high-frequency oscillating current generated by the transmitter flows into the feeding point via the RF microstrip line on the mainboard, and then flows into the main radiator from the feeding point to generate a corresponding resonant frequency band. At the same time, the oscillating current in the main radiator generates a magnetic field, and the parasitic branches generate an induced current through electromagnetic coupling with the main radiator, thereby generating a corresponding resonant frequency band. Through the above coupling process, the antenna can generate corresponding resonances within a variety of frequency bands, so that electromagnetic waves can be transmitted within a variety of frequency bands. The receiver receives the electromagnetic waves transmitted by the antenna and restores the transmission information contained in the electromagnetic waves.

[0061] According to an embodiment of the present invention, a PCB board is also provided.

[0062] Optionally, the antenna forms an effective electromagnetic radiation and receiving structure by arranging a specific metal conductor pattern on the PCB board, thereby realizing the transmission and reception of wireless signals. Printing the antenna on the PCB board can have many advantages. For example, since the antenna is directly printed on the PCB board, no additional space or weight is required, which is suitable for small and lightweight equipment; for another example, compared with traditional external antennas, the manufacturing cost of printing the antenna on the PCB board is lower, eliminating external connectors and installation costs; the antenna can also be closely integrated with other components on the PCB board to improve the overall performance and stability of the product; similarly, the PCB board can be customized according to the different needs of the product to improve the matching degree and signal quality of the antenna.

[0063] According to an embodiment of the present invention, a mobile routing device is also provided.

[0064] Optionally, a mobile routing device is a portable broadband wireless device that is the size of a credit card or a mobile phone and combines the functions of a modem, a router, and an access point. The mobile routing device can convert cellular network signals (such as 4G / 5G networks) into Wi-Fi signals, providing wireless Internet connections for nearby devices (such as mobile phones, laptops, tablets, digital cameras, etc.). The mobile routing device is compact, so the antenna used for the mobile routing device also needs to be small in size and weight. In addition, with the development of 5G technology, mobile routing devices need to support more resonant frequency bands, so the antenna needs to have good multi-band support capabilities to meet the needs of different network environments.

[0065] According to an embodiment of the present invention, an antenna preparation method embodiment is also provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0066] Figure 8 is a schematic diagram of a process for preparing an antenna according to an embodiment of the present invention. Figure 8 As shown, the method includes the following steps: preparing a main radiator for generating a first resonant frequency band, and a first parasitic branch for generating a second resonant frequency band; printing the main radiator on a dielectric board, and connecting the main radiator to a feeding point on the dielectric board, wherein the feeding point is used to receive current transmitted from the main board and transmit the current to the main radiator to generate the first resonant frequency band; printing the first parasitic branch on the dielectric board, and connecting the first parasitic branch to a first grounding point, so that the first parasitic branch is coupled with the main radiator to generate a second resonant frequency band.

[0067] Step S801 : preparing a main radiator for generating a first resonant frequency band and a first parasitic branch for generating a second resonant frequency band.

[0068] In this step, according to the different requirements of the antenna resonant frequency band, there are multiple choices for the materials and shapes of the main radiator and parasitic branches. For example, for the selection of materials, it can be metal materials, such as copper, aluminum, etc. Metal materials have good electrical conductivity and can meet the reflection and guidance requirements of electromagnetic waves; in order to take into account weight, strength and electrical conductivity, composite materials can also be used, which can contain metal particles, fibers or other conductive components to achieve the required electromagnetic properties; with the development of new materials, materials such as graphene with excellent electrical conductivity and electromagnetic properties can also be used to prepare the main radiator and parasitic branches. For another example, for the choice of shape, it can be a straight line shape, which is simple in structure and easy to make, suitable for the radiation and reception of horizontally polarized waves; it can also be a broken line shape, which is simple in structure and can effectively reduce the antenna area.

[0069] Step S802, printing the main radiator on the dielectric board, and connecting the main radiator to the feeding point on the dielectric board, wherein the feeding point is used to receive the current transmitted from the main board and transmit the current to the main radiator to generate a first resonant frequency band.

[0070] In this step, the main radiator is the main part of the antenna responsible for radiating and receiving electromagnetic waves. Therefore, the main radiator is connected to the feeding point. The feeding point serves as the entrance for energy transmission and effectively transfers the RF energy output by the transmitter to the main radiator of the antenna. It is the basis for realizing electromagnetic wave radiation. Among them, the connection method and position between the feeding point and the main radiator of the antenna will affect the radiation efficiency of the antenna. Reasonable connection method and position selection can make the main radiator of the antenna more effectively convert RF energy into electromagnetic wave energy and radiate it. The design of the feeding point also needs to consider the matching problem with the output impedance of the transmitter. Through reasonable impedance matching, the reflection and loss of the signal during the transmission process can be reduced, and the efficiency and stability of signal transmission can be improved.

[0071] Step S803: Print the first parasitic branch on the dielectric board, and connect the first parasitic branch to the first grounding point, so that the first parasitic branch is coupled with the main radiator to generate a second resonant frequency band.

[0072] In this step, the parasitic branches can change the radiation characteristics and impedance characteristics of the antenna through electromagnetic coupling with the main radiator. After connecting to the ground point, the parasitic branches can more effectively participate in the electromagnetic field distribution of the antenna, thereby adjusting and optimizing the antenna performance. At the same time, in some antenna designs that need to work in multiple frequency bands at the same time, the connection between the parasitic branches and the ground point can be used to achieve multi-band operation. By reasonably designing the number and layout of the parasitic branches, the antenna can have better performance in different frequency bands.

[0073] Through the above steps, the purpose of generating multiple resonant frequency bands of the printed antenna is achieved, thereby achieving the technical effect that the resonant frequency band of the printed antenna covers low frequency to ultra-high frequency, thereby solving the technical problem of small resonant coverage range of the existing printed antenna.

[0074] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0075] According to an embodiment of the present invention, an antenna and an antenna preparation method are adopted. The antenna is printed on a dielectric board, and includes a feeding point, a first grounding point, a main radiator and a first parasitic branch. The feeding point is used to receive the current transmitted from the main board and transmit the current to the main radiator; the main radiator is connected to the feeding point, and is used to generate a first resonant frequency band based on the current; the first parasitic branch is connected to the first grounding point, and is used to couple with the main radiator to generate a second resonant frequency band, thereby achieving the purpose of the printed antenna generating multiple resonant frequency bands, thereby realizing the technical effect that the resonant frequency band of the printed antenna covers low frequency to ultra-high frequency, thereby solving the technical problem of the small resonant coverage range of the existing printed antenna.

[0076] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0077] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0078] In the several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the antenna embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0079] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0080] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An antenna, characterized in that: The antenna is printed on a dielectric board and includes a feeding point, a first grounding point, a main radiator and a first parasitic branch, wherein: The feeding point is used to receive the current transmitted from the mainboard and transmit the current to the main radiator; The main radiator is connected to the feeding point and is used to generate a first resonant frequency band based on the current; The first parasitic branch is connected to the first grounding point and is used to couple with the main radiator to generate a second resonant frequency band.

2. The antenna according to claim 1, characterized in that include: The main radiator includes a plurality of main radiator branches, wherein the plurality of main radiator branches are used to generate a plurality of resonant frequency bands, and the plurality of resonant frequency bands include the first resonant frequency band.

3. The antenna according to claim 2, characterized in that: The multiple resonant frequency bands include: a medium frequency band, a high frequency band, and an ultra-high frequency band.

4. The antenna according to claim 2, characterized in that: The plurality of main radiator branches are bent wirings.

5. The antenna according to claim 1, characterized in that: The first parasitic branch is a meandering trace.

6. The antenna according to claim 1, characterized in that The second resonance frequency band generated by the first parasitic branch is a low frequency band.

7. The antenna according to claim 6, characterized in that The first parasitic branch is a structure of multiple circuitous paths, wherein the multiple circuitous paths are used to form a low-frequency multi-resonance mode.

8. The antenna according to claim 6, characterized in that The antenna further comprises a second parasitic branch grounded through a second grounding point, and is used for adjusting the frequency of the second resonant frequency band to obtain the low-frequency multi-resonance mode.

9. The antenna according to any one of claims 1 to 8, characterized in that: include: The first resonant frequency band is determined based on at least one of the following: the shape and size of the main radiator, and the width of one or more gaps formed based on the shape and size of the main radiator; and / or, The second resonant frequency band is determined based on at least one of the following: the shape of the main radiator, the size of the main radiator, the width of one or more gaps formed based on the shape and size of the main radiator, the shape of the first parasitic branch, the size of the first parasitic branch, the width of one or more gaps formed based on the shape and size of the first parasitic branch, and the width of one or more gaps formed between the main radiator and the first parasitic branch.

10. A PCB board, characterized in that: The invention comprises the antenna according to any one of claims 1 to 9.

11. A mobile routing device, characterized in that: The invention comprises the antenna according to any one of claims 1 to 9.

12. A method for preparing an antenna, characterized in that: Used to prepare the antenna according to any one of claims 1 to 9, comprising: Prepare a main radiator for generating a first resonant frequency band, and a first parasitic branch for generating a second resonant frequency band; Printing the main radiator on a dielectric board, and connecting the main radiator to a feeding point on the dielectric board, wherein the feeding point is used to receive current transmitted from a main board and transmit the current to the main radiator to generate the first resonant frequency band; The first parasitic branch is printed on a dielectric board, and the first parasitic branch is connected to a first grounding point, so that the first parasitic branch is coupled with the main radiator to generate the second resonant frequency band.

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