Circularly polarized antenna

Abstract

The invention provides a circularly polarized antenna. Comprising a circular grounding plate, a circular dielectric substrate, a feed network, a plurality of L-shaped coupling units and a circular radiation sheet, a first surface of the dielectric substrate is attached to one surface of the grounding plate, and the feed network is arranged on a second surface of the dielectric substrate; one end of each L-shaped coupling unit is connected with the feed network, and the other end of each L-shaped coupling unit is connected with the radiation sheet. According to the circularly polarized antenna, the relatively good circularly polarized characteristic is ensured, the circularly polarized antenna can be compatible with a plurality of frequency band ranges, and meanwhile, the miniaturization of the circularly polarized antenna can be ensured, so that the communication quality of the mobile terminal is improved.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to a circularly polarized antenna. Background Art

[0002] With the development of wireless communication technology, especially in non-terrestrial network (NTN) communications, antennas are usually used as key components for signal reception and transmission. In order to ensure the communication quality of mobile terminals, it is necessary to optimize the performance of the antenna, for example, the working frequency band range of the antenna.

[0003] In the related art, circularly polarized antennas are generally used for signal transmission and reception. In actual applications, circularly polarized antennas can generate circularly polarized waves by generating two signals with equal amplitudes and a phase difference of 90 degrees, and transmit and receive signals based on the circularly polarized waves.

[0004] However, in the above process, due to the small internal space of the mobile terminal, the circularly polarized antenna will be limited in its operating frequency band while reducing its size, that is, most of them can only work in a single frequency band or a few fixed frequency bands, which is difficult to meet the actual communication needs. In this case, how to design a circularly polarized antenna that can be compatible with multiple frequency bands in the limited space of the mobile terminal is an urgent problem to be solved. Summary of the invention

[0005] The present application provides a circularly polarized antenna to solve the problem of poor communication quality.

[0006] In a first aspect, the present application provides a circular polarization antenna, comprising: a circular ground plane, a circular dielectric substrate, a feeding network, a plurality of L-shaped coupling units and a circular radiating plate, wherein:

[0007] The first surface of the dielectric substrate is arranged in contact with one surface of the ground plate, and the feeding network is arranged on the second surface of the dielectric substrate;

[0008] One end of the plurality of L-shaped coupling units is connected to the feeding network, and the other end of the plurality of L-shaped coupling units is connected to the radiation sheet.

[0009] In a possible implementation manner, the L-shaped coupling unit includes a metal column and a metal sheet, wherein:

[0010] One end of the metal column is connected to the feeding network;

[0011] The other end of the metal column is connected to one end of one side of the metal sheet;

[0012] In a possible implementation manner, the plurality of L-shaped coupling units include a first L-shaped coupling unit, a second L-shaped coupling unit, a third L-shaped coupling unit and a fourth L-shaped coupling unit, wherein:

[0013] Four metal posts in four L-shaped coupling units are connected to four connection points in the feeding network, and the four connection points form a square;

[0014] The metal sheet in the first L-shaped coupling unit is arranged opposite to the metal sheet in the third L-shaped coupling unit;

[0015] The metal sheet in the second L-shaped coupling unit is arranged opposite to the metal sheet in the fourth L-shaped coupling unit.

[0016] In a possible implementation manner, the antenna further includes a switch, and the feeding network includes at least two feeding units, wherein:

[0017] The switch is used to electrically connect the plurality of L-shaped coupling units to a selected one of the at least two feeding units.

[0018] In a possible implementation manner, the number of the L-shaped coupling units is 4, and the feeding unit includes 4 connection points, wherein:

[0019] One end of the switch is connected to one end of four metal pillars of four L-shaped coupling units;

[0020] The other end of the switch is used to connect to four connection points of a selected one of the at least two feed units, so as to connect the multiple L-shaped coupling units to the one feed unit.

[0021] In a possible implementation manner, the number of the L-shaped coupling units is 4, and the feeding unit includes 4 connection points, wherein:

[0022] The switch is used to drive the four L-shaped coupling units to rotate, so as to connect the four metal pillars in the four L-shaped coupling units with the four connection points of a selected one of the at least two feeding units.

[0023] In a possible implementation manner, the number of the L-shaped coupling units is 4, and the feeding network is used to generate electrical signals with equal amplitudes and phases lagging by 90 degrees respectively at the electrical connections with the four L-shaped coupling units.

[0024] In a possible implementation manner, the feeding network includes at least one of the following: a microstrip line, a waveguide, a stripline, a chip device, or a radio frequency matching network circuit.

[0025] In a possible implementation manner, the material of the dielectric substrate is epoxy resin.

[0026] In a possible implementation manner, the antenna is a non-terrestrial network (NTN) antenna.

[0027] In a possible implementation, the antenna is a circularly polarized antenna.

[0028] In a second aspect, an embodiment of the present application provides an electronic device, comprising: at least one processor; enabling the at least one processor to execute the circularly polarized antenna involved in the first aspect and any item of the first aspect.

[0029] The circularly polarized antenna provided in the embodiment of the present application includes a circular ground plate, a circular dielectric substrate, a feeding network, a plurality of L-shaped coupling units and a circular radiating plate. By setting a plurality of L-shaped coupling units to be connected with the feeding network, a plurality of electrical signals with equal amplitudes and a phase difference of 90 degrees can be generated, and a better circular polarization characteristic can be achieved. Furthermore, by setting up the feeding network, the circularly polarized antenna can operate within a variety of frequency bands, that is, it can be compatible with multiple frequency bands at the same time, and the circularly polarized antenna has a compact structure and can be applied to mobile terminals. Therefore, the circularly polarized antenna provided in the embodiment of the present application can ensure that it has a good circular polarization characteristic and can be compatible with multiple frequency bands, while ensuring the miniaturization of the circularly polarized antenna, thereby improving the communication quality of the mobile terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] Figure 1A A side view of a circularly polarized antenna provided in an embodiment of the present application;

[0032] Figure 1B for Figure 1A A top view of a circularly polarized antenna;

[0033] Figure 1C A schematic diagram of the structure of another circularly polarized antenna provided in an embodiment of the present application;

[0034] Figure 2A A schematic diagram of a structure of a feeding network provided in an embodiment of the present application;

[0035] Figure 2B Another structural schematic diagram of a feeding network provided in an embodiment of the present application;

[0036] Figure 3A A schematic diagram of the structure of an L-shaped coupling unit, a mechanical switch and a feeding network 3 provided in an embodiment of the present application;

[0037] Figure 3BA schematic diagram of the structure of an L-shaped coupling unit, an electronic switch and a feeding network provided in an embodiment of the present application;

[0038] Figure 4A A schematic diagram of S11 simulation of the circularly polarized antenna in the N256 frequency band provided in an embodiment of the present application;

[0039] Figure 4B A schematic diagram of S11 simulation of the circularly polarized antenna provided in the embodiment of the present application in the satellite network frequency band;

[0040] Figure 4C A schematic diagram of the axial ratio simulation of the circularly polarized antenna in the N256 frequency band provided in an embodiment of the present application;

[0041] Figure 4D A schematic diagram of the axial ratio simulation of the circularly polarized antenna in the satellite network frequency band provided in an embodiment of the present application;

[0042] Figure 5 A schematic diagram of the positions of the circularly polarized antenna and the mobile terminal provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 1- Ground plate;

[0045] 2- dielectric substrate;

[0046] 3- Feeding network;

[0047] 3a-first feeding unit;

[0048] 3b-second feeding unit;

[0049] 4-L-shaped coupling unit;

[0050] 4a-metal column;

[0051] 4b-Metal sheet;

[0052] 5-Radiating sheet;

[0053] 6- Toggle switch.

[0054] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0056] It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, and they should be regarded as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0057] The circularly polarized antenna shown in the present application is described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar contents will not be described repeatedly in different embodiments.

[0058] Below, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0059] Non-terrestrial network (NTN): a terminal-satellite direct communication technology, and an important supplement to ground cellular communication technology. Through the integration of satellite communication network and ground 5G network, NTN can provide ubiquitous coverage without being restricted by topography, connecting the sky, land, sea and other spaces to form an integrated ubiquitous access network and realize on-demand access in all scenarios.

[0060] Antenna S11 parameter: usually indicates the reflection coefficient of the antenna, that is, the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmission power of the antenna port. This ratio reflects the radiation efficiency of the antenna. The smaller the reflected signal, the more signals are radiated into space through the antenna, and the higher the radiation efficiency of the antenna; the larger the reflected signal, the less signals are radiated into space through the antenna, and the lower the radiation efficiency of the antenna.

[0061] Axial ratio: It is a key parameter to measure the circular polarization characteristics of an antenna and represents the ideal degree of circular polarization. The bandwidth with an axial ratio of no more than 3dB is defined as the circular polarization bandwidth of the antenna, and a circularly polarized antenna with an axial ratio of less than 3dB can achieve better circular polarization characteristics.

[0062] For ease of understanding, the following Figure 1A-1B , the structure of a circularly polarized antenna provided in an embodiment of the present application is described.

[0063] Figure 1AA side view of a circularly polarized antenna provided in an embodiment of the present application. Figure 1B for Figure 1A Top view of the circularly polarized antenna.

[0064] See also Figure 1A and Figure 1B The circularly polarized antenna of the embodiment of the present application includes a circular ground plate 1, a circular dielectric substrate 2, a feeding network 3, a plurality of L-shaped coupling units 4 and a circular radiation plate 5.

[0065] The first surface of the dielectric substrate 2 is bonded to one surface of the ground plate 1 , and the feeding network 3 is arranged on the second surface of the dielectric substrate 2 ; one end of the multiple L-shaped coupling units 4 is connected to the feeding network 3 , and the other end of the multiple L-shaped coupling units 4 is connected to the radiation plate 5 .

[0066] Fitting means that different components are electrically connected in a certain fixed manner. For example, the fixing method may be welding, bonding, etc. In actual application, electrical connection can be performed through surface mount technology (SMT).

[0067] The ground plate 1 is circular in shape with a diameter of 48 mm. The ground plate 1 is arranged parallel to the dielectric substrate 2 , wherein one surface of the ground plate 1 is electrically connected to the first surface of the dielectric substrate 2 .

[0068] The dielectric substrate 2 has supporting and fixing functions, and can be used to fix the feed network 3 and the ground plate 1. The feed network 3 can be electrically connected to the dielectric substrate 2 in a fixed or detachable manner.

[0069] In the embodiment of the present application, the material of the dielectric substrate 2 is epoxy resin, the shape of the dielectric substrate is circular, the diameter of which must be less than or equal to the diameter of the ground plate 1, and the thickness of the dielectric substrate 2 is 0.8 mm.

[0070] The feeding network 3 includes at least two feeding units, each of which can operate in a different resonance mode, and different resonance modes correspond to different frequency coverage ranges, that is, the feeding network 3 is compatible with multiple operating frequency bands.

[0071] Specifically, in an embodiment of the present application, the feed network 3 may include but is not limited to: a first feed unit 3a, a second feed unit 3b and other multiple feed units, wherein the working frequency band of the first feed unit 3a is the N256 band (1980MHz~2200MHz), the working frequency band of the second feed unit 3b is the star network band (3440MHz~3660MHz), and the working frequency bands of other feed units may be NTN / WIFI2.4G / WIFI5G / FDD / TDD / N77 / N78 / N79, etc.

[0072] Each feed unit includes a power divider and a phase shifter. The power divider is used to distribute the received electrical signal with equal power, so as to obtain two or more electrical signals with equal amplitude and the same phase.

[0073] The phase shifter is used to adjust the phase of each electrical signal so that the phase of each electrical signal differs by 90 degrees. For example, assuming that the power divider divides the received electrical signal into two electrical signals with equal amplitude and the same phase, namely electrical signal 1 and electrical signal 2, the phase shifter can adjust the phases of the two electrical signals with equal amplitude and phase to the corresponding phases, that is, the phase of electrical signal 1 can be adjusted to 270 degrees, and the phase of electrical signal 2 can be adjusted to 180 degrees, where the phase difference between electrical signal 1 and electrical signal 2 is 90 degrees.

[0074] In actual application, the number of the L-shaped coupling units 4 is 4, and the feeding network 3 is used to generate electrical signals with equal amplitudes and phases lagging by 90 degrees respectively at the electrical connections with the four L-shaped coupling units.

[0075] For example, assuming that the feeding network 3 generates electrical signals at the electrical connections with the four L-shaped coupling units, namely electrical signal 1, electrical signal 2, electrical signal 3 and electrical signal 4, the phase relationship between the above electrical signals can be shown in Table 1:

[0076] Table 1

[0077]

[0078] Please refer to Table 1. Through the coupling effect between the L-shaped coupling unit 4 and the feeding network 3, the phases of the electrical signal 1, the electrical signal 2, the electrical signal 3 and the electrical signal 4 can be 0 degrees, 90 degrees, 180 degrees and 270 degrees respectively, and the phase difference between adjacent electrical signals is 90 degrees.

[0079] The radiation sheet 5 may be formed of metal or other conductive materials, and can radiate the received electrical signal to the external space in the form of electromagnetic waves, or receive electromagnetic waves from the external space.

[0080] In the embodiment of the present application, there is air between the radiation sheet 5 and the dielectric substrate 2, the radiation sheet 5 and the multiple L-shaped coupling units 4 do not contact each other, and remain parallel to the plane direction of the dielectric substrate 2. The radiation sheet 5 is circular in shape, the diameter of the radiation sheet 5 is smaller than the diameter of the dielectric substrate 2, and the vertical distance between the radiation sheet 5 and the grounding plate 1 is 12 mm. It should be noted that the specific shape and size of the radiation sheet 5 can be set accordingly according to the use scenario or actual needs of the antenna, and are not limited here.

[0081] The size of the antenna can be determined based on the size of the ground plate 1 and the vertical distance between the ground plate 1 and the radiation plate 5. In the embodiment of the present application, the diameter of the ground plate 1 is 48 mm, and the vertical distance between the ground plate 1 and the radiation plate 5 is 12 mm, then the size of the circularly polarized antenna is 48 mm*48 mm*12 mm.

[0082] The following is an explanation of the transceiver process of a circularly polarized antenna:

[0083] When the circularly polarized antenna is a receiving antenna, the electromagnetic wave signal in the space is first received by the antenna's radiating plate 5, which converts the electromagnetic wave signal into an electrical signal and couples the electrical signal to a plurality of L-shaped coupling units 4. The L-shaped coupling units 4 then transmit the electrical signal to the feeding network 3. After the feeding network 3 performs preliminary processing on the signal, it transmits it to the feeding component of the mobile terminal for subsequent signal processing and communication, thereby completing the signal reception process.

[0084] When the circularly polarized antenna is a transmitting antenna, the signal sent by the mobile terminal is received by the feeding network 3 (for example, the first feeding unit 3a) in the circularly polarized antenna. The feeding network distributes the signal to each L-shaped coupling unit in an appropriate manner by adjusting the phase and amplitude. Then the L-shaped coupling unit couples the electrical signal to the radiation plate 5. The radiation plate 5 converts the electrical signal into an electromagnetic wave signal and radiates the signal into space in the form of an electromagnetic wave, thereby completing the signal transmission process.

[0085] The circularly polarized antenna provided in the embodiment of the present application includes a circular ground plate, a circular dielectric substrate, a feeding network, a plurality of L-shaped coupling units and a circular radiating plate. By setting a plurality of L-shaped coupling units to be connected with the feeding network, a plurality of electrical signals with equal amplitudes and a phase difference of 90 degrees can be generated, and a better circular polarization characteristic can be achieved. Furthermore, by setting up the feeding network, the circularly polarized antenna can operate within a variety of frequency bands, that is, it can be compatible with multiple frequency bands at the same time, and the circularly polarized antenna has a compact structure and can be applied to mobile terminals. Therefore, the circularly polarized antenna provided in the embodiment of the present application can ensure that it has a good circular polarization characteristic and can be compatible with multiple frequency bands, while ensuring the miniaturization of the circularly polarized antenna, thereby improving the communication quality of the mobile terminal.

[0086] exist Figure 1A-1B Based on the following, combined Figure 1C , the structure of the circularly polarized antenna is further explained.

[0087] Figure 1C This is a schematic diagram of the structure of another circularly polarized antenna provided in an embodiment of the present application. It should be noted that in order to clearly illustrate the internal connection of the circularly polarized antenna, Figure 1CThe L-shaped coupling unit 4 and the feeding network 3 are drawn with a perspective dashed frame.

[0088] See also Figure 1C The L-shaped coupling unit 4 includes a metal column 4a and a metal sheet 4b, wherein one end of the metal column 4a is connected to the feeding network 3; and the other end of the metal column 4a is connected to one end of one side of the metal sheet 4b.

[0089] The other end of the metal column 4 a is perpendicular to the metal sheet 4 b , and the end of the metal column 4 a away from the metal sheet 4 b is perpendicular to the feeding network 3 .

[0090] The metal sheet 4b is rectangular in shape, and its size is much smaller than that of the radiation sheet 5, and is parallel to the plane direction of the dielectric substrate 2. In actual application, the metal sheet 4b and the metal column 4a need to be arranged according to the center direction of the radiation sheet 5, that is, the end of the metal sheet 4b away from the metal column 4a is oriented toward the center direction of the radiation sheet 5.

[0091] The multiple L-shaped coupling units 4 include a first L-shaped coupling unit, a second L-shaped coupling unit, a third L-shaped coupling unit and a fourth L-shaped coupling unit, wherein the four metal columns in the four L-shaped coupling units are connected to the four connection points in the feeding network, and the four connection points form a square; the metal sheet in the first L-shaped coupling unit is arranged opposite to the metal sheet in the third L-shaped coupling unit; and the metal sheet in the second L-shaped coupling unit is arranged opposite to the metal sheet in the fourth L-shaped coupling unit.

[0092] See also Figure 1C The circularly polarized antenna further includes a switch 6, wherein the switch 6 is used to electrically connect the plurality of L-shaped coupling units to a selected one of the at least two feeding units.

[0093] In actual application, the circularly polarized antenna may be an array unit antenna of an antenna array, that is, the antenna array includes a certain number of circularly polarized antennas (array unit antennas), and a plurality of circularly polarized antennas are arranged to form an antenna array. In the embodiment of the present application, the number of circularly polarized antennas in the antenna array is not further limited.

[0094] Next, combine Figure 2A and Figure 2B , the feeding network 3 of the circularly polarized antenna is explained through a specific example.

[0095] Figure 2A A schematic diagram of a structure of a feeding network provided in an embodiment of the present application, Figure 2B Another structural diagram of a feeding network provided in an embodiment of the present application is provided, assuming that the feeding network 3 includes two feeding units, namely a first feeding unit 3a and a second feeding unit 3b.

[0096] See also Figure 2A , the first feeding unit 3a and the second feeding unit 3b are arranged in parallel.

[0097] See also Figure 2B There is a preset angle between the first feeding unit 3a and the second feeding unit 3b. For example, the preset angle may be 10 degrees.

[0098] Optionally, the feeding network 3 includes at least one of the following: a microstrip line, a waveguide, a stripline, a chip device, or a radio frequency matching network circuit. It should be noted that the embodiment of the present application does not impose any limitation on this.

[0099] The circularly polarized antenna provided in the embodiment of the present application includes four L-shaped coupling units, each of which includes a metal column and a metal sheet, and further includes a switching switch. Through the mutual coupling of the four L-shaped coupling units and the four connection points of the feeding unit in the feeding network, four electrical signals with equal amplitudes and phases lagging by 90 degrees can be generated, which can achieve better circular polarization characteristics. Furthermore, the electrical connection between the L-shaped coupling unit and different feeding units can be controlled by switching the switch to switch different frequency bands under different conditions. Therefore, the circularly polarized antenna in the embodiment of the present application has better circular polarization characteristics, and can be compatible with multiple frequency bands at the same time, so as to achieve frequency adjustment of the antenna and improve the versatility of the antenna.

[0100] Next, combine Figure 3A and Figure 3B , the feeding network 3, the L-shaped coupling unit 4, and the switching switch 6 in the circularly polarized antenna are described in detail.

[0101] In an embodiment of the present application, the number of L-shaped coupling units is 4, and the feeding unit includes 4 connection points, wherein one end of the switching switch is connected to one end of the 4 metal pillars of the 4 L-shaped coupling units; the other end of the switching switch is used to connect to the 4 connection points of a selected feeding unit from at least two feeding units to connect multiple L-shaped coupling units to one feeding unit.

[0102] Figure 3A For a structural schematic diagram of an L-shaped coupling unit, a mechanical switch and a feeding network provided in an embodiment of the present application, please refer to 3A. It is assumed that the feeding network 3 includes a first feeding unit 3a and a second feeding unit 3b. The first feeding unit 3a has four connection points, namely m, n, u and v, and the second feeding unit 3b has four connection points, namely p, q, r and s.

[0103] Specifically, when the selected feeding unit is the first feeding unit 3a, the switching switch 6 needs to be connected to the four connection points of m, n, u and v respectively; when the selected feeding unit is the second feeding unit 3b, the switching switch 6 needs to be connected to the four connection points of p, q, r and s respectively.

[0104] In the case where the switching switch 6 is a mechanical switch, electrical connection can be performed in the following manner: a plurality of L-shaped coupling units 4 are fitted and arranged using a non-metallic medium, and a mechanical switch (for example, an angle-adjustable knob, etc.) is arranged on the non-metallic medium. After determining a selected feeding unit, the mechanical switch is adjusted so that the plurality of L-shaped coupling units 4 are rotated to a specific angle and electrically connected to the selected feeding unit.

[0105] It should be noted that the specific shape, size and position of the non-metallic medium and the mechanical switch can be set accordingly according to the use scenario or actual needs of the antenna, and are not limited here.

[0106] Optionally, the switch 6 may be a mechanical switch or an electronic switch, wherein the switch is used to drive the four L-shaped coupling units to rotate, so as to connect the four metal pillars in the four L-shaped coupling units with the four connection points of a selected one of the at least two feeding units.

[0107] Figure 3B A schematic diagram of the structure of an L-shaped coupling unit, an electronic switch and a feeding network provided in an embodiment of the present application. Assuming that the feeding network 3 includes a first feeding unit 3a and a second feeding unit 3b, see 3B. When the switching switch 6 is an electronic switch, electrical connection can be performed in the following manner: by respectively setting electronic switches at the electrical connection points of the four connection points of the multiple L-shaped coupling units 4 close to the feeding network 3, namely, switch 1 (corresponding to the first L-shaped coupling unit), switch 2 (corresponding to the second L-shaped coupling unit), switch 3 (corresponding to the third L-shaped coupling unit) and switch 4 (corresponding to the fourth L-shaped coupling unit).

[0108] After determining the selected feed unit, the switch states of switches 1 to 4 are controlled to switch from an open state to a closed state, so that the plurality of L-shaped coupling units 4 and the four connection points of the selected feed unit are electrically connected.

[0109] The circularly polarized antenna provided in the embodiment of the present application controls the connection between four L-shaped coupling units and different feeding units by switching switches, wherein the switching switch may be a mechanical switch or an electronic switch. Specifically, the entire L-shaped coupling unit may be controlled by setting a mechanical switch, or by respectively setting electronic switches at the connection between the four connection points of the feeding unit and the L-shaped coupling unit. In this way, the circularly polarized antenna may switch different feeding units and corresponding frequency bands (for example, N256 frequency band, etc.) by switching switches under different conditions. Therefore, the circularly polarized antenna can be compatible with multiple frequency bands at the same time, realize multi-band adjustability, and improve the versatility of the antenna.

[0110] Based on any of the above embodiments, Figures 4A-4D , the S11 parameters and axial ratio of the circularly polarized antenna are described in detail.

[0111] Optionally, it is assumed that the feeding network 3 includes two feeding units, namely a first feeding unit 3a and a second feeding unit 3b, wherein the working frequency band of the first feeding unit 3a is the N256 band, and the working frequency band of the second feeding unit 3b is the star network band, and different feeding units can be switched by switching the switch 6 to adjust the corresponding working frequency band.

[0112] Figure 4A This is a schematic diagram of the S11 simulation of the circularly polarized antenna in the N256 frequency band provided in the embodiment of the present application. Figure 4A , where the horizontal axis represents the operating frequency and the vertical axis represents the S11 value of the antenna. In the antenna, the S11 value is generally required to be less than -10dB. When the switch 6 is switched to the first feeding unit 3a, the S11 value of the antenna in the operating frequency band (1980MHz~2200MHz) is less than -10dB, and has good radiation performance.

[0113] Figure 4B This is a schematic diagram of the S11 simulation of the circularly polarized antenna in the satellite network frequency band provided in the embodiment of the present application. Figure 4B , where the horizontal axis represents the operating frequency and the vertical axis represents the S11 value of the antenna. When the switch 6 is switched to the second feeding unit 3b, the S11 value of the antenna in the operating frequency band (3440MHz~3660MHz) is less than -10dB, and has good radiation performance.

[0114] It should be noted that the S11 parameter is usually a negative number. The smaller the S11 parameter is, the smaller the antenna return loss is, and the smaller the energy reflected by the antenna itself is, which means that more energy actually enters the antenna and the higher the system efficiency of the antenna is; the larger the S11 parameter is, the greater the antenna return loss is, and the lower the system efficiency of the antenna is. Generally, the S11 value of -10dB is used as the standard. When the S11 value of the antenna is less than -10dB, it can be considered that the antenna can work normally, or the antenna can be considered to have good transceiver efficiency. Therefore, the circularly polarized antenna structure provided in the embodiment of the present application has good transceiver efficiency.

[0115] Figure 4C This is a schematic diagram of the axial ratio simulation of the circularly polarized antenna in the N256 frequency band provided in the embodiment of the present application. Figure 4C , wherein the horizontal axis represents the operating frequency, and the vertical axis represents the axial ratio of the antenna. When the switch 6 is switched to the first feeding unit 3a, the axial ratio of the antenna in the operating frequency band (1980MHz~2200MHz) is less than 3dB, and the circular polarization characteristics can be well achieved.

[0116] Figure 4D This is a schematic diagram of the axial ratio simulation of the circularly polarized antenna in the satellite network frequency band provided in the embodiment of the present application. Figure 4D , where the horizontal axis represents the operating frequency and the vertical axis represents the axial ratio of the antenna. When the switch 6 is switched to the second feeding unit 3b, the axial ratio of the antenna in the operating frequency band (3440MHz~3660MHz) is less than 3dB, which can better realize the circular polarization characteristics.

[0117] It should be noted that the above are only simulation diagrams of the S11 parameter and the axial ratio of the antenna in the form of examples, and are not intended to limit the working frequency band of the antenna.

[0118] Specifically, the working frequency band of the antenna (NTN / WIFI2.4G / WIFI5G / FDD / TDD / N77 / N78 / N79) can be switched by setting and adjusting other feeding units, and the corresponding S11 parameters and axial ratios can be obtained in different frequency bands. It can be obtained that the S11 values ​​of the antenna in different working frequency bands are all less than -10dB, and the axial ratios are all less than 3dB, that is, the circularly polarized antenna can be applied to multiple frequency bands and can better complete signal reception and transmission.

[0119] from FIG. 4A to FIG. 4B It can be seen that the circularly polarized antenna provided in the embodiment of the present application has good circular polarization characteristics and radiation performance.

[0120] Figure 5 A schematic diagram of the positions of the circularly polarized antenna and the mobile terminal provided in the embodiment of the present application, such as Figure 5 As shown,

[0121] The circularly polarized antenna of the embodiment of the present application can be set and applied in a mobile terminal, and the antenna can be installed at the top or upper middle of the mobile terminal. The other side of the ground plate 1 can be electrically connected to the grounding component of the mobile terminal, and the end of the feeding unit away from the L-shaped coupling unit 4 can be electrically connected to the feeding component of the mobile terminal to achieve signal transmission and reception.

[0122] Among them, mobile terminals may include but are not limited to: mobile phones, tablet computers, laptops, e-books, routers, wearable devices (for example, watches, bracelets, smart helmets, etc.), vehicle-mounted units, smart home devices (rice cookers, speakers, home management devices, etc.), augmented reality (AR), virtual reality (VR) devices and various single-board modules, etc.

[0123] Taking the mobile terminal as a mobile phone as an example, it is assumed that in the circularly polarized antenna, the feeding network 3 includes at least two feeding units, namely the first feeding unit 3a, the second feeding unit 3b, etc., which are electrically connected to the grounding component of the mobile phone through the grounding plate 1, and are electrically connected to the feeding component of the mobile phone through a feeding unit in the feeding network 3 to realize signal reception and transmission.

[0124] The circularly polarized antenna provided in the embodiment of the present application has good circular polarization characteristics and high radiation performance, and can achieve adjustment of multiple frequency bands within the limited space of the mobile terminal, that is, at a lower height and smaller size. The circularly polarized antenna not only improves the versatility of the circularly polarized antenna, but also ensures the miniaturization of the circularly polarized antenna, so that the mobile terminal can maintain stable signal reception and transmission in various application scenarios, thereby improving the communication quality of the mobile terminal.

[0125] The electronic device provided in the embodiment of the present application may be the mobile terminal of the above embodiment.

[0126] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules is only a logical function division, and there may be other division methods in actual implementation, such as multiple modules 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 an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0127] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.

[0128] It should be understood that the above processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the invention can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A circularly polarized antenna, characterized in that: The invention comprises a circular ground plate, a circular dielectric substrate, a feeding network, a plurality of L-shaped coupling units and a circular radiation sheet, wherein: The first surface of the dielectric substrate is arranged in contact with one surface of the ground plate, and the feeding network is arranged on the second surface of the dielectric substrate; One end of the plurality of L-shaped coupling units is connected to the feeding network, and the other end of the plurality of L-shaped coupling units is connected to the radiation sheet.

2. The antenna according to claim 1, characterized in that The L-shaped coupling unit includes a metal column and a metal sheet, wherein: One end of the metal column is connected to the feeding network; The other end of the metal column is connected to one end of one side of the metal sheet.

3. The antenna according to claim 2, characterized in that: The plurality of L-shaped coupling units include a first L-shaped coupling unit, a second L-shaped coupling unit, a third L-shaped coupling unit and a fourth L-shaped coupling unit, wherein: Four metal posts in four L-shaped coupling units are connected to four connection points in the feeding network, and the four connection points form a square; The metal sheet in the first L-shaped coupling unit is arranged opposite to the metal sheet in the third L-shaped coupling unit; The metal sheet in the second L-shaped coupling unit is arranged opposite to the metal sheet in the fourth L-shaped coupling unit.

4. The antenna according to any one of claims 1 to 3, characterized in that: The antenna further comprises a switching switch, and the feeding network comprises at least two feeding units, wherein: The switch is used to electrically connect the plurality of L-shaped coupling units to a selected one of the at least two feeding units.

5. The antenna according to claim 4, characterized in that: The number of the L-shaped coupling units is 4, and the feeding unit includes 4 connection points, wherein: One end of the switch is connected to one end of four metal pillars of four L-shaped coupling units; The other end of the switch is used to connect to four connection points of a selected one of the at least two feed units, so as to connect the multiple L-shaped coupling units to the one feed unit.

6. The antenna according to claim 4, characterized in that: The number of the L-shaped coupling units is 4, and the feeding unit includes 4 connection points, wherein: The switch is used to drive the four L-shaped coupling units to rotate, so as to connect the four metal pillars in the four L-shaped coupling units with the four connection points of a selected one of the at least two feeding units.

7. The antenna according to any one of claims 1 to 6, characterized in that: The number of the L-shaped coupling units is 4, and the feeding network is used to generate electrical signals with equal amplitudes and phases lagging by 90 degrees respectively at the electrical connections with the four L-shaped coupling units.

8. The antenna according to any one of claims 1 to 7, characterized in that: The feeding network includes at least one of the following: a microstrip line, a waveguide, a stripline, a chip device, or a radio frequency matching network circuit.

9. The antenna according to any one of claims 1 to 8, characterized in that: The material of the dielectric substrate is epoxy resin.

10. The antenna according to any one of claims 1 to 9, characterized in that: The antenna is a non-terrestrial network NTN antenna.

11. The antenna according to any one of claims 1 to 10, characterized in that: The antenna is a circularly polarized antenna.

12. An antenna array, characterized in that: The invention comprises a plurality of circularly polarized antennas as described in any one of claims 1 to 11.

13. An electronic device, characterized in that: The circularly polarized antenna comprises the circularly polarized antenna described in any one of claims 1 to 11.

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