Antenna, antenna array, wireless communication module and terminal

Abstract

The present application relates to the technical field of communications. Disclosed in the present application are an antenna, an antenna array, a wireless communication module and a terminal. The antenna comprises a first radiator and a second radiator, the first radiator and the second radiator being connected to a common feed point. The operating passband of the antenna comprises the resonant frequency of the fundamental mode of the first radiator. The resonant frequency of the fundamental mode of the first radiator is different from the resonant frequency of the fundamental mode of the second radiator. In a frequency band between the resonant frequency of the fundamental mode of the first radiator and the resonant frequency of the fundamental mode of the second radiator, the first radiator and the second radiator form equal-amplitude anti-phase currents. Therefore, the current of the first radiator and the current of the second radiator can cancel each other out, thereby forming a radiation null, the radiation null being used for constituting an operating stopband of the antenna. The antenna has a good suppression effect on signals of the operating stopband, such that the degree of coupling between the antenna and other antennas in the operating stopband is small, and the degree of isolation is high, thereby avoiding interference between the antennas.

Description

Antennas, antenna arrays, wireless communication modules and terminals

[0001] This application claims priority to Chinese Patent Application No. 202411650064.6, filed on November 18, 2024, entitled "Antenna, Antenna Array, Wireless Communication Module and Terminal", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to an antenna, an antenna array, a wireless communication module, and a terminal. Background Technology

[0003] To meet the operational needs of different application scenarios, more and more antennas are being installed in terminals, each capable of operating at different frequency bands. However, antennas operating at different frequency bands are prone to mutual interference. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides an antenna, an antenna array, a wireless communication module, and a terminal. The following describes this application from multiple aspects, and the implementation methods and beneficial effects of these aspects can be referenced interchangeably.

[0005] This application provides an antenna in a first aspect. Specifically, the antenna includes a first radiator and a second radiator, wherein the first radiator and the second radiator are connected to the same feed point. The operating passband of the antenna includes the resonant frequency of the fundamental mode of the first radiator, and the resonant frequency of the fundamental mode of the first radiator is different from the resonant frequency of the fundamental mode of the second radiator. Within the frequency band between the resonant frequencies of the fundamental modes of the first and second radiators, the first radiator and the second radiator generate equal-amplitude, opposite-phase currents.

[0006] According to the embodiments of this application, the currents of the first radiator and the second radiator are equal-amplitude, opposite-phase currents, thereby canceling each other out and forming a radiation null. The frequency band centered on the radiation null is used to constitute the antenna's operating stopband, that is, the frequency band that the antenna needs to isolate. The antenna has a good signal suppression effect in this frequency band; therefore, the antenna has high isolation from other antennas in this frequency band, less interference, and good operating performance.

[0007] In one possible implementation of the first aspect described above, the first radiator and the second radiator are dipole radiators or monopole radiators.

[0008] In one possible implementation of the first aspect described above, the first radiator is a dipole radiator, including a first extension and a second extension. Both the first and second extensions extend along a first direction, and the first extension and the second extension are positioned opposite each other along the first direction in the orthographic projection region of the first plane, with the first direction being parallel to the first plane. One end of each of the first and second extensions is connected to a feed point.

[0009] According to the embodiments of this application, when the first radiator operates in the fundamental mode, the electromagnetic waves formed by the currents on the first extension segment and the second extension segment can be superimposed on each other, thereby propagating to a distance, so that the first radiator can effectively radiate electromagnetic waves when operating in the fundamental mode.

[0010] In one possible implementation of the first aspect described above, the first radiator further includes a third extension, the other end of which is connected to the third extension, the third extension extending along a second direction, the angle between the second direction and the first direction being greater than 0°.

[0011] In this way, the first radiator can be ensured to have a certain length to meet the actual working requirements, while the size of the first radiator can be reduced to improve the compactness of the structure.

[0012] In one possible implementation of the first aspect described above, the electrical length of the first radiator is 0.5λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator. This improves the operating performance of the first radiator.

[0013] In one possible implementation of the first aspect described above, the first radiator is a monopole radiator, including a first extension, and the antenna also includes a ground plane. The first extension extends along a first direction, and the ground plane is positioned opposite to the first plane along the first direction in the orthographic projection region of the first plane, the first direction being parallel to the first plane. One end of the first extension and the ground plane are both connected to a feed point.

[0014] In one possible implementation of the first aspect described above, the second radiator is a dipole radiator, comprising a fourth extension segment, a fifth extension segment, a sixth extension segment, and a seventh extension segment. The fourth and fifth extension segments both extend along a second direction, and the projection regions of the fourth and fifth extension segments onto the first plane are positioned opposite each other along the first direction. The distance between the projection regions of the fourth and fifth extension segments on the first plane is 0-0.05λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator. Both the first and second directions are parallel to the first plane, and the angle between the first and second directions is greater than 0°. One end of each of the fourth and fifth extension segments is connected to a feed point, the other end of the fourth extension segment is connected to the sixth extension segment, and the other end of the fifth extension segment is connected to the seventh extension segment. The sixth and seventh extension segments extend in opposite directions and are parallel to the first direction.

[0015] This allows for a smaller distance between the fourth and fifth extension segments, enabling them to couple with each other. The coupling effect between the fourth and fifth extension segments can adjust the resonant frequency of the higher-order modes of the second radiator to near the resonant frequency of the fundamental mode of the first radiator. This allows a continuous frequency band to be formed, centered on the resonant frequency of the higher-order modes of the second radiator and the resonant frequency of the fundamental mode of the first radiator, ultimately extending the bandwidth of the antenna's operating passband. Simultaneously, it can suppress the radiation effect of the second radiator operating in its fundamental mode.

[0016] In one possible implementation of the first aspect described above, the second radiator is a dipole radiator, comprising a fourth extension segment, a fifth extension segment, a sixth extension segment, and a seventh extension segment. The fourth and fifth extension segments both extend along a second direction, and the orthographic projection region of the fourth extension segment onto the first plane at least partially overlaps with the orthographic projection region of the fifth extension segment onto the first plane. The second direction is parallel to the first plane. One end of the fourth extension segment and one end of the fifth extension segment are respectively connected to a feed point. The other end of the fourth extension segment is connected to the sixth extension segment, and the other end of the fifth extension segment is connected to the seventh extension segment. The sixth and seventh extension segments extend in opposite directions and are parallel to the first direction, with an angle greater than 0° between the first and second directions.

[0017] This allows for a smaller distance between the fourth and fifth extension segments, further enhancing the coupling effect between them. The coupling effect between the fourth and fifth extension segments can adjust the resonant frequency of the higher-order modes of the second radiator to near the resonant frequency of the fundamental mode of the first radiator. This ensures that the frequency band centered on the resonant frequency of the higher-order modes of the second radiator and the resonant frequency centered on the resonant frequency of the fundamental mode of the first radiator can form a continuous frequency band, ultimately extending the bandwidth of the antenna's operating passband. Simultaneously, it can suppress the radiation effect of the second radiator operating in its fundamental mode.

[0018] In one possible implementation of the first aspect described above, the antenna includes a dielectric substrate, with a fourth extension and a fifth extension disposed on opposite surfaces of the dielectric substrate along the thickness direction of the dielectric substrate.

[0019] In this way, the fourth and fifth extension segments can be overlapped in the thickness direction of the dielectric substrate, so that the distance between the fourth and fifth extension segments is smaller, thereby further improving the coupling effect between the fourth and fifth extension segments.

[0020] In one possible implementation of the first aspect described above, the antenna includes a dielectric substrate, with a first radiator and a second radiator disposed on opposite surfaces of the dielectric substrate along the thickness direction of the dielectric substrate.

[0021] By placing the first radiator and the second radiator on the upper and lower surfaces of the dielectric substrate, respectively, the antenna's radiation capability can be made more uniform in different directions, thereby further reducing the antenna's directivity coefficient. This allows the antenna to have better omnidirectional radiation capability, providing more stable signal coverage and improving the antenna's robustness against signal fading and interference.

[0022] In one possible implementation of the first aspect described above, the antenna includes a U-shaped coupling stub, a fourth extension, and a fifth extension in the orthographic projection region of the first plane, located in the opening of the orthographic projection region of the U-shaped coupling stub in the first plane.

[0023] The U-shaped coupling stub can couple with the fourth and fifth extension segments to form radiation nulls. Thus, the antenna can have multiple radiation nulls. When the frequencies corresponding to the multiple radiation nulls are close together, the antenna has better suppression in the operating stopband; when the frequencies corresponding to the multiple radiation nulls are far apart, the antenna can have multiple operating stopbands to meet the needs of different application scenarios, thus broadening its applicability.

[0024] In one possible implementation of the first aspect described above, the antenna includes a directing structure located in the orthographic projection region of a first plane, on the side of the orthographic projection region of the first radiator on the first plane opposite to the orthographic projection region of the second radiator on the first plane, wherein the first plane is parallel to the extension direction of the first radiator. By providing the directing structure, the directivity coefficient of the antenna can be reduced, thereby giving the antenna better omnidirectional radiation capability.

[0025] In one possible implementation of the first aspect described above, the antenna includes a third radiator connected to a feed point. The antenna's operating passband includes the resonant frequency of the fundamental mode of the third radiator, and the resonant frequency of the fundamental mode of the third radiator is different from the resonant frequencies of the fundamental modes of the first and second radiators. Between the resonant frequencies of the fundamental modes of the first and third radiators, the first and third radiators form equal-amplitude, opposite-phase currents. Between the resonant frequencies of the fundamental modes of the second and third radiators, the second and third radiators form equal-amplitude, opposite-phase currents.

[0026] In this way, the antenna can have more operating passbands to meet the needs of different application scenarios, thus broadening its applicability. Furthermore, between the resonant frequencies of the fundamental modes of the first and third radiators, the first and third radiators generate equal-amplitude, opposite-phase currents, which cancel each other out, forming a radiation null. Similarly, between the resonant frequencies of the fundamental modes of the second and third radiators, the second and third radiators generate equal-amplitude, opposite-phase currents, which also cancel each other out, forming another radiation null. Thus, the antenna can have multiple radiation nulls. When the frequencies corresponding to multiple radiation nulls are close together, the antenna has better suppression performance in the operating stopband; when the frequencies corresponding to multiple radiation nulls are far apart, the antenna can have multiple operating stopbands to meet the needs of different application scenarios, further broadening its applicability.

[0027] In one possible implementation of the first aspect described above, the distance between the orthographic projection region of the third radiator on the first plane and the orthographic projection region of the first radiator on the first plane is 0.001λ1-0.01λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator, and the first plane is parallel to the extension directions of the first and second radiators. Alternatively, the distance between the orthographic projection region of the third radiator on the first plane and the orthographic projection region of the second radiator on the first plane is 0.001λ1-0.01λ1. This effectively improves the radiation effect of the third radiator.

[0028] A second aspect of this application provides an antenna array comprising a plurality of antennas described in the first aspect and any possible implementation thereof, wherein the plurality of antennas are connected to the same feed point.

[0029] A third aspect of this application provides a wireless communication module, which includes a radio frequency (RF) front-end module, an antenna as described in the first aspect and any possible implementation thereof, and the antenna being connected to the RF front-end module. Alternatively, the wireless communication module may also include an RF front-end module and an antenna array as described in the second aspect, with the antenna array connected to the RF front-end module.

[0030] The fourth aspect of this application provides a terminal, which includes a housing and the wireless communication module described in the third aspect above, the wireless communication module being disposed on the housing.

[0031] It should be understood that the beneficial effects of the second to fourth aspects mentioned above can be referred to the description of the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0032] Figure 1A illustrates an exemplary application scenario of an embodiment of this application;

[0033] Figure 1B illustrates an exemplary architecture of the wireless communication module in the terminal in an embodiment of this application;

[0034] Figure 2 shows a schematic diagram of the antenna structure in an embodiment of this application;

[0035] Figure 3 shows the equivalent circuit diagram of the first radiator being a dipole radiator in an embodiment of this application;

[0036] Figure 4A shows a block diagram illustrating the principle of the antenna forming a radiation null point at frequency f0 in an embodiment of this application.

[0037] Figure 4B shows the equivalent circuit diagram of the antenna at frequency f0 in an embodiment of this application;

[0038] Figure 5A shows a schematic diagram of the S11 parameters of the antenna in an embodiment of this application, based on Figure 2;

[0039] Figure 5B shows a schematic diagram of the antenna efficiency in an embodiment of this application, based on Figure 2;

[0040] Figure 6A illustrates the N79 band and Wi-Fi 5G band in an embodiment of this application;

[0041] Figure 6B illustrates the Wi-Fi 5G LB band and Wi-Fi 5G HB band in the embodiments of this application;

[0042] Figure 6C illustrates the Wi-Fi 5G band and Wi-Fi 6E band in embodiments of this application;

[0043] Figure 7A illustrates an exemplary structure of the first radiator in the antenna according to an embodiment of this application;

[0044] Figure 7B illustrates an exemplary structure two of the first radiator in the antenna according to an embodiment of this application;

[0045] Figure 8A illustrates an exemplary structure of the second radiator in the antenna according to an embodiment of this application;

[0046] Figure 8B illustrates an exemplary structure of the second radiator in the antenna according to an embodiment of this application;

[0047] Figure 8C illustrates an exemplary structure three of the second radiator in the antenna according to an embodiment of this application;

[0048] Figure 8D illustrates an exemplary structure four of the second radiator in the antenna according to an embodiment of this application;

[0049] Figure 9A shows a top view of the first radiator and the second radiator in the antenna of an embodiment of this application;

[0050] Figure 9B shows a side view of the first radiator and the second radiator in the antenna in an embodiment of this application;

[0051] Figure 9C shows a schematic diagram of the first and second radiators in the antenna in an embodiment of this application, viewed along the Z1 direction in Figure 9B.

[0052] Figure 9D shows a schematic diagram of the first and second radiators in the antenna in an embodiment of this application, viewed along the Z2 direction in Figure 9B.

[0053] Figure 10 shows the S11 parameters and overall efficiency of the antenna in an embodiment of this application, based on Figure 9A.

[0054] Figure 11A shows a top view of the first radiator and the second radiator in the antenna in an embodiment of this application;

[0055] Figure 11B shows a second side view of the first radiator and the second radiator in the antenna of this application embodiment;

[0056] Figure 11C shows a schematic diagram of the first and second radiators in the antenna in this embodiment of the application, viewed along the Z1 direction in Figure 11B.

[0057] Figure 11D shows a schematic diagram of the first and second radiators in the antenna in this embodiment of the application, viewed along the Z2 direction in Figure 11B.

[0058] Figure 12 shows the S11 parameters and overall efficiency of the antenna in an embodiment of this application, based on Figure 11A.

[0059] Figure 13A shows a top view of an antenna including a third radiator in an embodiment of this application;

[0060] Figure 13B shows a side view of an antenna including a third radiator in an embodiment of this application;

[0061] Figure 14 shows a schematic diagram of the S11 parameters and overall efficiency of the antenna in an embodiment of this application, based on Figure 13A.

[0062] Figure 15 illustrates an exemplary structure of the antenna array in an embodiment of this application;

[0063] Figure 16A shows a schematic diagram of the S11 parameters and overall efficiency of the antenna array in an embodiment of this application, based on Figure 15.

[0064] Figure 16B shows the radiation pattern of the antenna array at 2.4 GHz in an embodiment of this application, based on Figure 15;

[0065] Figure 16C shows the radiation pattern of the antenna array at 5.5 GHz in an embodiment of this application, based on Figure 15.

[0066] Figure 17 shows a schematic diagram of the antenna structure in some other embodiments of this application;

[0067] Figure 18 shows a schematic diagram of the antenna structure in some technical solutions. Detailed Implementation

[0068] To facilitate understanding of the technical solution of this application, some concepts or terms involved in this application will be explained first.

[0069] (1) Antenna isolation

[0070] When one antenna (denoted as antenna A) transmits a signal, the ratio of the signal strength received by another antenna (denoted as antenna B) to the signal strength transmitted by antenna A is called the isolation. Antenna isolation can be expressed as the absolute value of the antenna's S21 parameter, measured in decibels (dB). The S21 parameter is usually negative. A larger absolute value of the S21 parameter indicates greater isolation between antennas and less interference between them; conversely, a smaller absolute value indicates less isolation between antennas and more interference between them.

[0071] (2) Filtered antenna

[0072] The antennas in the embodiments of this application are all filter antennas. Filter antennas are not only used to receive or transmit electromagnetic waves, but also have filtering functions. That is, filter antennas can selectively suppress frequency signals outside the operating frequency band (or "passband"). The suppressed frequency band can be called the "operating stopband". The efficiency of the filter antenna is significantly reduced in the operating stopband, thus producing an efficiency dip in the efficiency curve of the filter antenna. The minimum point of the efficiency dip is called the radiation null point. That is, the efficiency of the filter antenna is the lowest and the suppression effect is the best at the radiation null point.

[0073] The embodiments of this application will now be described in further detail with reference to the accompanying drawings.

[0074] This application provides an antenna and a wireless communication module and terminal including the antenna. The terminal provided in this application can be any of the following terminals with wireless communication functions, including but not limited to customer premises equipment (CPE), mobile phones, tablets, laptops, indoor distribution systems (lampsites), wireless headphones (e.g., true wireless stereo (TWS) headphones), wearable devices (such as smartwatches, smart bracelets, smart helmets, smart glasses, smart jewelry), augmented reality (AR) / virtual reality (VR) devices, personal communication service (PCS) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), or base stations. This application does not specifically limit the type of terminal.

[0075] For ease of description, the following uses the example of a customer's on-site equipment as the terminal to introduce the technical solution of this application.

[0076] Figure 1A illustrates an exemplary application scenario of an embodiment of this application. Referring to Figure 1A, terminal 01 is on the left, and mobile phones 02 and 03, located at a distance from terminal 01, are on the right. Terminal 01 includes a wireless communication module 1 and a housing 3. The wireless communication module 1 is housed within the housing 3, and is shown as a dashed line in Figure 1A for ease of observation. Terminal 01 can achieve wireless communication with mobile phones 02 and 03 through the wireless communication module 1.

[0077] Specifically, Figure 1B illustrates an exemplary architecture of the wireless communication module 1 in terminal 01 in this embodiment of the application. Referring to Figure 1B and in conjunction with Figure 1A, the wireless communication module 1 includes an antenna 11, an antenna 12, a radio frequency front-end module 13, a radio frequency front-end module 14, and a chip 15. The antenna 11 is connected to the radio frequency front-end module 13, the antenna 12 is connected to the radio frequency front-end module 14, and the radio frequency front-end module 13 and the radio frequency front-end module 14 are respectively connected to the chip 15.

[0078] Antenna 11 can transmit and receive signals with the antenna (not shown) in mobile phone 02, thereby realizing wireless communication between terminal 01 and mobile phone 02. Antenna 12 can transmit and receive signals with the antenna (not shown) in mobile phone 03, thereby realizing wireless communication between terminal 01 and mobile phone 03.

[0079] Taking the signal reception process of antenna 11 as an example, after receiving electromagnetic waves, antenna 11 can convert the received electromagnetic waves into radio frequency (RF) signals. Then, antenna 11 transmits this RF signal to the RF front-end module 13. The RF front-end module 13 can process the received RF signal (e.g., filtering, amplification), and then send the processed signal to chip 15. Chip 15 can decode the received signal to extract useful information or data, such as data representing user data or control information like voice, text, or video.

[0080] It is understood that the process of antenna 11 transmitting signals is the reverse of the process of antenna 11 receiving signals, and the process of antenna 12 transmitting and receiving signals is essentially the same as the process of antenna 11 transmitting and receiving signals. Therefore, the above description of antenna 11 receiving signals can be referred to, and will not be repeated here.

[0081] In some embodiments of this application, the number of antennas 11 and antennas 12 can be one or more groups (e.g., two, three, four or five groups, etc.), and each group of antennas can be a single antenna or multiple antennas (e.g., two, three, four or five, etc.). This application does not impose any restrictions on this.

[0082] In some embodiments of this application, antenna 11 and antenna 12 can be different antennas. For example, antenna 11 can be a fifth-generation Wi-Fi 5G antenna or a Wi-Fi 2.4G+5G antenna; antenna 12 can be a sixth-generation Wi-Fi 6G antenna.

[0083] As mentioned earlier, antennas operating in different frequency bands (e.g., antennas 11 and 12 mentioned above) are prone to mutual interference and have poor isolation. For example, when terminal 01 receives a signal sent by mobile phone 02 through antenna 11, it may also receive a signal sent by terminal 01 to mobile phone 03 through antenna 12, causing interference to the communication between terminal 01 and mobile phone 03.

[0084] In view of this, this application provides an antenna that can form the operating stopband of the antenna in a specific frequency band. This antenna has a good signal suppression effect on the operating stopband, resulting in low coupling and high isolation between the antenna and other antennas in this operating stopband, thereby avoiding interference between antennas.

[0085] The technical solution of this application will be described in detail below with reference to the accompanying drawings.

[0086] Figure 2 shows a schematic diagram of the antenna 10 in an embodiment of this application. Referring to Figure 2, the antenna 10 includes a first radiator 100 and a second radiator 200. For easy distinction, the extension path of the first radiator 100 is shown in dashed lines in Figure 2, and the extension path of the second radiator 200 is shown in dotted lines.

[0087] In this configuration, both the first radiator 100 and the second radiator 200 are connected to a feed point P. Feed point P is the connection point between the feed line (not shown) and the first radiator 100 and the second radiator 200. When the feed line feeds a signal to the first radiator 100 and the second radiator 200 via feed point P, the signal can be split into two, providing equal amplitude and in-phase power to the first radiator 100 and the second radiator 200 respectively. In other words, feed point P is used to provide parallel power to the first radiator 100 and the second radiator 200.

[0088] The fundamental mode resonant frequency of the first radiator 100 is frequency f1. Here, the fundamental mode refers to the lowest resonant frequency produced by a radiator in a certain antenna mode, and the resonant frequency of the fundamental mode is the frequency corresponding to the radiator in the fundamental mode. Corresponding to the fundamental mode are higher-order modes, which refer to other resonant modes besides the fundamental mode. These modes typically have more complex electromagnetic field distributions and corresponding resonant frequencies. For example, in the embodiment shown in Figure 2, the first radiator 100 is a dipole radiator. The fundamental mode of the dipole radiator is a half-wavelength mode resonance, and the higher-order modes can be, for example, a three-half-wavelength mode resonance. Figure 3 shows the equivalent circuit diagram of the first radiator 100 being a dipole radiator in an embodiment of this application. Referring to Figure 3, when the first radiator 100 operates in the fundamental mode or a higher-order mode, it can be equivalent to an inductor L1 and a capacitor C1 connected in series. In other embodiments, the first radiator 100 can also be other types of radiators, and correspondingly, the fundamental mode and the higher-order mode can be different wavelength mode resonances. For example, the first radiator 100 can also be a monopole radiator, the fundamental mode of which is a quarter-wavelength mode resonance, and the higher-order modes can be, for example, a three-quarter-wavelength mode resonance.

[0089] The fundamental mode resonant frequency of the second radiator 200 is frequency f2. Referring to Figure 3, when the second radiator 200 operates in the fundamental mode or higher-order mode, it can be equivalent to an inductor L2 and a capacitor C2 connected in series. It can be understood that the fundamental mode and higher-order mode of the second radiator 200 can be referred to the relevant descriptions of the fundamental mode and higher-order mode of the first radiator 100 mentioned above, and will not be repeated here.

[0090] The operating passband of antenna 10 may include the resonant frequency f1 of the fundamental mode of the first radiator 100. Furthermore, the resonant frequency f1 of the fundamental mode of the first radiator 100 and the resonant frequency f2 of the fundamental mode of the second radiator 200 are not equal. For example, in this embodiment, frequency f1 is greater than frequency f2. In other embodiments, frequency f1 may be less than frequency f2, and this application does not impose any limitations on this.

[0091] Thus, at a certain frequency between frequency f1 and frequency f2, the first radiator 100 and the second radiator 200 can generate currents of equal amplitude and opposite phase, thereby canceling out the currents of the first radiator 100 and the second radiator 200, thus forming a radiation zero point.

[0092] For example, Figure 4A shows a block diagram illustrating the principle of antenna 10 forming a radiation null at frequency f0 in an embodiment of this application. Figure 4B shows an equivalent circuit diagram of antenna 10 at frequency f0 in an embodiment of this application. Here, frequency f0 is a frequency between frequency f1 and frequency f2; for example, in this embodiment, frequency f2 < frequency f0 < frequency f1.

[0093] Referring to Figures 4A and 4B, firstly, the first radiator 100 and the second radiator 200 are connected to the feed point P, and the first radiator 100 and the second radiator 200 are fed in parallel through the feed point P. Therefore, the amplitude of the current of the first radiator 100 and the amplitude of the current of the second radiator 200 are equal.

[0094] Secondly, for a radiator, when the resonant frequency of the fundamental mode of the radiator is higher than the operating frequency, the radiator can be regarded as a capacitor, and the phase of the current in the capacitor leads the phase of the voltage by 90°; when the resonant frequency of the fundamental mode of the radiator is lower than the operating frequency, the radiator can be regarded as an inductor, and the phase of the current in the inductor lags the phase of the voltage by 90°.

[0095] Since frequency f2 < frequency f0 < frequency f1, at frequency f0, the first radiator 100 can be equivalent to a capacitor C3, and the phase of the current in the first radiator 100 leads the phase of the voltage by 90°; the second radiator 200 can be equivalent to an inductor L3, and the phase of the current in the second radiator 200 lags the phase of the voltage by 90°. Therefore, the currents in the first radiator 100 and the second radiator 200 are opposite currents.

[0096] In summary, at frequency f0, the currents of the first radiator 100 and the second radiator 200 are equal-amplitude, opposite-phase currents, thus canceling each other out and forming a radiation null. The frequency band centered on this radiation null is used to constitute the operating stopband of the antenna 10, i.e., the frequency band that the antenna 10 needs to isolate. The antenna 10 has a good signal suppression effect in this frequency band; therefore, the antenna 10 has high isolation from other antennas in this frequency band, low interference, and excellent operating performance.

[0097] To provide a more intuitive understanding of the performance of the antenna 10 provided in this application, the following description is provided in conjunction with the S11 parameters of the antenna 10 and schematic diagrams such as efficiency curves.

[0098] To facilitate understanding, before introducing the S11 parameters and efficiency of antenna 10, some concepts or terms used below will be explained.

[0099] S-parameters are important parameters in microwave transmission. Any network can be characterized by multiple S-parameters, where Sij represents the energy injected at port j and measured at port i. Taking a two-port network as an example, a two-port network has four S-parameters, representing the reflection coefficient S11 (returning from the input port to the input port), the reflection coefficient S22 (returning from the output port to the output port), the transmission coefficient S12 (transmission from the input port to the output port), and the transmission coefficient S21 (transmission from the output port to the input port).

[0100] Among them, the S11 parameter is used to characterize the antenna's transmission efficiency. Specifically, the smaller the S11 parameter, the smaller the antenna's return loss, the less energy the antenna itself reflects back, which means that more energy actually enters the antenna, the better the antenna's impedance matching, and the higher the transmission efficiency.

[0101] Radiation efficiency refers to the ratio of energy radiated by an antenna to energy transmitted into the antenna, excluding losses due to impedance mismatch. Higher radiation efficiency means the antenna converts more input power into radiated power.

[0102] Total efficiency refers to the ratio of the antenna's radiated power to the input power provided by the feed line. It includes losses due to impedance mismatch, so total efficiency is usually lower than radiation efficiency.

[0103] For example, FIG5A shows a schematic diagram of the S11 parameters of antenna 10 in an embodiment of the present application, based on FIG2. Referring to FIG5A, the operating passband of antenna 10 includes 6.5GHz-10.5GHz. Within 6.5GHz-10.5GHz, the S11 parameters of antenna 10 are less than -10dB. Therefore, antenna 10 has good impedance matching.

[0104] Figure 5B illustrates the efficiency of antenna 10 in an embodiment of this application, based on Figure 2. Referring to Figure 5B, within the 6.5GHz-10.5GHz range, the efficiency curve of antenna 10 is relatively flat, and the efficiency is close to 0dB, indicating good performance. For example, the radiation efficiency and total efficiency of antenna 10 within the operating passband of 6.5GHz-10.5GHz are approximately greater than or equal to -1dB, demonstrating good operating efficiency.

[0105] The operating stopband of antenna 10 includes 5.9 GHz to 6.3 GHz. Within this range, the efficiency curve of antenna 10 drops sharply, forming an efficiency dip. The minimum point of this efficiency dip is a radiation null, which is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and second radiator 200. The frequency corresponding to this radiation null is f0 (6.1 GHz). At 6.1 GHz, the radiation efficiency of antenna 10 decreases to approximately -2.5 dB, and the overall efficiency of antenna 10 decreases to approximately -5.4 dB. Due to the low efficiency of antenna 10 in the 5.9 GHz to 6.3 GHz range, the transmission and reception of signals in this range by antenna 10 can be effectively suppressed. The coupling between antenna 10 and other antennas operating in the 5.9 GHz to 6.3 GHz range is weakened, thereby effectively improving the isolation between antenna 10 and other antennas in the 5.9 GHz to 6.3 GHz range.

[0106] In summary, the antenna 10 described above, by feeding the first radiator 100 and the second radiator 200 in parallel and by reasonably designing the resonant frequencies of the fundamental modes of the first radiator 100 and the second radiator 200, can form a working stopband in the frequency band that the antenna 10 needs to isolate, thereby avoiding interference between antennas, especially avoiding interference between antennas with relatively close working passbands.

[0107] For example, the operating passband of antenna 10 can be the N79 band (4.4GHz-5GHz) in the embodiment shown in Figure 6A, while the operating passbands of other antennas can be the Wi-Fi 5G band (5.15GHz-5.85GHz) in the embodiment shown in Figure 6A. The N79 band and the Wi-Fi 5G band are closely spaced, separated by only 150MHz. Therefore, by rationally designing the first radiator 100 and the second radiator 200 of antenna 10, the operating stopband of antenna 10 can be made to be the Wi-Fi 5G band, effectively avoiding mutual interference between antenna 10 and other frequency bands in the Wi-Fi 5G band and improving isolation.

[0108] For example, the operating passband of antenna 10 can also be the fifth-generation low band (Wi-Fi 5G LB) in the embodiment shown in Figure 6B, while the operating passbands of other antennas can be the fifth-generation high band (Wi-Fi 5G HB) in the embodiment shown in Figure 6B. The Wi-Fi 5G LB band is 5.15GHz-5.33GHz, and the Wi-Fi 5G HB band is 5.49GHz-5.85GHz, which are closely spaced, separated by only 160MHz. Similarly, the operating stopband of antenna 10 can be designed to be the Wi-Fi 5G HB band to avoid interference between antenna 10 and other antennas in the Wi-Fi 5G HB band, thus improving isolation.

[0109] For example, the operating passband of antenna 10 can also be the Wi-Fi 5G band in the embodiment shown in Figure 6C, while the operating passbands of other antennas can be the wireless fidelity sixth extended (Wi-Fi 6E) band in the embodiment shown in Figure 6C. The Wi-Fi 5G band is 5.15GHz-5.85GHz, and the Wi-Fi 6E band is 5.925GHz-7.125GHz, which are closely spaced, separated by only 75MHz. Similarly, the operating stopband of antenna 10 can be designed to be the Wi-Fi 6E band to avoid interference between antenna 10 and other antennas in the Wi-Fi 6E band, thus improving isolation.

[0110] The specific structure and operation of antenna 10 will be further described below with reference to the accompanying drawings.

[0111] In some feasible solutions, by rationally designing the structural dimensions of the first radiator 100, it is possible to achieve good radiation performance when the first radiator 100 is operating in its fundamental mode. Thus, the operating passband of the antenna 10 can include a frequency band centered on the resonant frequency f1 of the fundamental mode of the first radiator 100.

[0112] It is understood that, depending on the type of the first radiator 100 (e.g., a dipole radiator or a monopole radiator), the first radiator 100 may have different structural dimensions to ensure that the first radiator 100 has a good radiation effect when operating in the fundamental mode.

[0113] In some embodiments of this application, the first radiator 100 may be a dipole radiator, which will be described exemplarily below.

[0114] Figure 7A illustrates an exemplary structure of the first radiator 100 in the antenna 10 according to an embodiment of this application. Referring to Figure 7A, the first radiator 100 may include a first extension 101 and a second extension 102. Both the first extension 101 and the second extension 102 extend along the X direction (as an example of a first direction). Furthermore, the first extension 101 and the second extension 102 are disposed opposite each other along the X direction in the orthographic projection area of ​​the first plane F1. The X direction is parallel to the first plane F1, or in other words, the first plane F1 is parallel to the extension direction of the first radiator 100. The first extension 101 and the second extension 102 may respectively constitute two radiating arms of the first radiator 100, and both radiating arms are in a straight line shape.

[0115] It should be noted that, in the embodiments of this application, A and B being positioned opposite each other along a certain direction can mean that A and B are face-to-face (opposite to, or face to face). For example, when the first extension segment 101 is positioned opposite the second extension segment 102 in the orthographic projection area of ​​the first plane F1 along the X direction, the first extension segment 101 and the second extension segment 102 in the orthographic projection area of ​​the first plane F1 have at least a partial overlap in the X direction.

[0116] One end of the first extension 101 (e.g., end 101a) and one end of the second extension 102 (e.g., end 102a) are respectively connected to the feed point P. When a signal is fed into the first radiator 100 via the feed point P, causing the first radiator 100 to operate in fundamental mode, currents of the same direction and magnitude can be generated on the first extension 101 and the second extension 102. The dashed arrows marked on each extension in FIG. 7A indicate the direction of current flow on that extension. The electromagnetic waves formed by the currents on the first extension 101 and the second extension 102 can superimpose each other, thereby propagating to a distance, thus enabling the first radiator 100 to effectively radiate electromagnetic waves when operating in fundamental mode.

[0117] It is understood that Figure 7A above only schematically illustrates a partial structural form of the radiating arm of the first radiator 100 and does not constitute a limitation of this application. In other embodiments, the first radiator 100 may also include more extensions to form radiating arms of different shapes.

[0118] For example, in some implementations, the radiating arm of the first radiator 100 can be L-shaped. Specifically, FIG7B shows an exemplary structure of the first radiator 100 in the antenna 10 of this application embodiment. Referring to FIG7B, the first radiator 100 may further include a third extension 103. The third extension 103 extends along the Y direction (as an example of a second direction). The angle between the Y direction and the X direction is greater than 0°. The third extension 103 is connected to the other end (e.g., end 101b) of the first extension 101, so that the first extension 101 and the third extension 103 can together form an L-shaped radiating arm. Wherein, end 101b and end 101a are arranged opposite to each other along the X direction, and along the X direction, end 101b is farther away from end 102a than end 101a.

[0119] This ensures that the first radiator 100 has a certain length to meet actual working requirements, while also reducing the size of the first radiator 100 along the X direction, thus improving the compactness of the structure. The length of the first radiator 100 refers to the length of the path extending from one end of the first radiator 100 to the other end.

[0120] It is understood that the first radiator 100 in the aforementioned dipole configuration can be a symmetrical or asymmetrical structure, and this application does not impose any specific limitations on it. For example, in the embodiment shown in Figure 7A above, the first radiator 100 has a symmetrical structure, and the first radiator 100 is symmetrical about the feed point P. As another example, in the embodiment shown in Figure 7B above, the first radiator 100 has an asymmetrical structure.

[0121] In some implementations, the electrical length of the dipole-shaped first radiator 100 can be, for example, 0.5λ1, where λ1 is the operating wavelength corresponding to frequency f1. This can improve the operating performance of the dipole-shaped first radiator 100. It is understood that in the embodiments of this application, the physical length of the radiator can be (1 ± 10%) times its electrical length; for example, the physical length of the first radiator 100 can be (1 ± 10%) times its electrical length.

[0122] In other embodiments of this application, the first radiator 100 may also be a monopole radiator. The monopole-shaped first radiator 100 includes one radiating arm, and the antenna 10 may also include a ground plane, which can be equivalent to another radiating arm of the dipole-shaped first radiator 100. That is, one radiating arm of the dipole-shaped first radiator 100 in the embodiments shown in Figures 7A and 7B can be replaced with a ground plane. For ease of understanding, the specific structure of the first radiator 100 as a monopole radiator can be referred to the relevant description in the embodiment shown in Figure 17 below, and will not be described here.

[0123] In some implementations, the electrical length of the first radiator 100 in monopole form can be, for example, 0.25λ1, where λ1 is the operating wavelength corresponding to frequency f1.

[0124] In some feasible solutions, by rationally designing the structural dimensions of the second radiator 200, the resonant frequency f3 of the higher-order mode of the second radiator 200 can be adjusted to be near the resonant frequency f1 of the fundamental mode of the first radiator 100. This allows the frequency band centered at frequency f1 and the frequency band centered at frequency f3 to form a continuous frequency band, thereby widening the operating passband of the antenna 10. Thus, the operating passband of the antenna 10 can also include the frequency band centered at frequency f3.

[0125] It is understood that, depending on the type of the second radiator 200 (e.g., a dipole radiator or a monopole radiator), the second radiator 200 may have different structural dimensions to enable the resonant frequency f3 of the higher-order mode of the second radiator 200 to be adjusted to be near the resonant frequency f1 of the fundamental mode of the first radiator 100.

[0126] In some embodiments of this application, the second radiator 200 may be a dipole radiator, which will be described exemplarily below.

[0127] Figure 8A illustrates an exemplary structure of the second radiator 200 in the antenna 10 according to an embodiment of this application. Referring to Figure 8A, the second radiator 200 may include a fourth extension 201, a fifth extension 202, a sixth extension 203, and a seventh extension 204.

[0128] Both the fourth extension segment 201 and the fifth extension segment 202 extend along the Y direction. The fourth extension segment 201 and the fifth extension segment 202 are positioned opposite each other along the X direction in the orthographic projection region of the first plane F1. Furthermore, the distance d1 between the fourth extension segment 201 and the fifth extension segment 202 in the orthographic projection region of the first plane F1 can be 0-0.05λ1, for example, 0, 0.01λ1, 0.02λ1, or 0.03λ1, etc. λ1 is the operating wavelength corresponding to the resonant frequency f1 of the fundamental mode of the first radiator 100.

[0129] One end of the fourth extension segment 201 (e.g., end 201a) and one end of the fifth extension segment 202 (e.g., end 202a) are both connected to the feed point P. The other end of the fourth extension segment 201 (e.g., end 201b) is connected to the sixth extension segment 203. The other end of the fifth extension segment 202 (e.g., end 202b) is connected to the seventh extension segment 204. The extension directions of the sixth extension segment 203 and the seventh extension segment 204 are opposite and parallel to the X direction. For example, in this embodiment, the sixth extension segment 203 extends along the X1 direction, and the seventh extension segment 204 extends along the X2 direction, where the X1 direction is the positive X direction and the X2 direction is the negative X direction. As another example, FIG8B shows an exemplary structure two of the second radiator 200 in the antenna 10 in this application embodiment. Referring to FIG8B, the sixth extension segment 203 may also extend along the X2 direction, and the seventh extension segment 204 may extend along the X1 direction. This application does not limit this. It is understood that the overlapping portions of the sixth extension segment 203 and the seventh extension segment 204 in Figure 8B are insulated from each other in order to prevent the sixth extension segment 203 and the seventh extension segment 204 from conducting to each other.

[0130] Thus, the fourth extension segment 201 and the sixth extension segment 203 can together form an L-shaped radiating arm, and the fifth extension segment 202 and the seventh extension segment 204 can together form another L-shaped radiating arm.

[0131] In the aforementioned second radiator 200, due to the small distance between the fourth extension segment 201 and the fifth extension segment 202, they can couple with each other. The coupling effect between the fourth extension segment 201 and the fifth extension segment 202 can change the current distribution generated when the second radiator 200 operates in a higher-order mode. This allows the resonant frequency f3 of the higher-order mode of the second radiator 200 to be adjusted to be near the resonant frequency f1 of the fundamental mode of the first radiator 100, so that the frequency band centered at frequency f1 and the frequency band centered at frequency f3 can form a continuous frequency band, ultimately extending the bandwidth of the operating passband of the antenna 10.

[0132] In some implementations, the ratio between the resonant frequency f3 of the higher-order mode of the second radiator 200 and the resonant frequency f1 of the fundamental mode of the first radiator 100 can be greater than 1 and less than 1.5, for example, 1.1, 1.2, 1.3, or 1.4. This ensures that the frequency band centered at frequency f1 and the frequency band centered at frequency f3 can form a continuous frequency band, thereby widening the operating passband of the antenna 10.

[0133] Referring again to Figure 8A, the coupling effect between the fourth extension 201 and the fifth extension 202 can also suppress the radiation effect of the second radiator 200 when it is operating in the fundamental mode. Thus, the operating stopband of the antenna 10 can also include a frequency band centered on the resonant frequency f2 of the fundamental mode of the second radiator 200.

[0134] Specifically, when a signal is fed into the second radiator 200 via a feed point P, causing the second radiator 200 to operate in the fundamental mode, currents of opposite directions and equal magnitudes can be generated in the fourth extension 201 and the fifth extension 202. Since the fourth extension 201 and the fifth extension 202 are coupled to each other, the currents in the fourth extension 201 and the fifth extension 202 can cancel each other out, ultimately suppressing the radiation effect of the second radiator 200 when operating in the fundamental mode.

[0135] In other embodiments, the fourth extension segment 201 in the orthographic projection area of ​​the first plane F1 and the fifth extension segment 202 in the orthographic projection area of ​​the first plane F1 can at least partially overlap, thereby making the distance between the fourth extension segment 201 and the fifth extension segment 202 smaller, thereby further improving the coupling effect between the fourth extension segment 201 and the fifth extension segment 202.

[0136] For example, FIG8C shows an exemplary structure three of the second radiator 200 in the antenna 10 of this application embodiment. Referring to FIG8C, when viewed in a direction perpendicular to the plane of the paper, the fourth extension segment (not shown) and the fifth extension segment 202 coincide, with the fourth extension segment being blocked by the fifth extension segment 202. Thus, the orthographic projection area of ​​the fourth extension segment 201 on the first plane F1 coincides with the orthographic projection area of ​​the fifth extension segment 202 on the first plane F1, and the second radiator 200 is generally T-shaped in the orthographic projection area of ​​the first plane F1.

[0137] It is understandable that the overlapping parts of the fourth extension segment and the fifth extension segment 202 are insulated from each other in order to prevent the fourth extension segment and the fifth extension segment 202 from conducting to each other.

[0138] It is understood that Figures 8A to 8C above are only schematic illustrations of a portion of the structural form of the radiating arm of the second radiator 200 and do not constitute a limitation of this application. In other embodiments, the second radiator 200 may also include more extensions to form radiating arms of different shapes.

[0139] For example, in some implementations, the radiating arm of the second radiator 200 can be U-shaped. Specifically, FIG8D shows an exemplary structure four of the second radiator 200 in the antenna 10 of this application embodiment. Referring to FIG8D, the second radiator 200 may further include an eighth extension segment 205. The eighth extension segment 205 extends along the Y direction. The eighth extension segment 205 is connected to the end of the sixth extension segment 203 away from the fourth extension segment 201, so that the fourth extension segment 201, the sixth extension segment 203 and the eighth extension segment 205 together constitute a U-shaped radiating arm, wherein the fourth extension segment 201 and the eighth extension segment 205 are the two sidewalls of the U-shaped radiating arm, and the sixth extension segment 203 is the bottom wall of the U-shaped radiating arm.

[0140] This ensures that the second radiator 200 has a certain length to meet actual working requirements, while also reducing its size and improving structural compactness. The length of the second radiator 200 refers to the length of the path extending from one end of the second radiator 200 to its other end.

[0141] It is understood that the second radiator 200 in the aforementioned dipole configuration can be a symmetrical or asymmetrical structure, and this application does not impose any specific limitations on it. For example, in the embodiments shown in Figures 8A to 8C, the second radiator 200 has a symmetrical structure, and the second radiator 200 is symmetrical about the feed point P. As another example, in the embodiment shown in Figure 8D, the second radiator 200 has an asymmetrical structure.

[0142] In some implementations, when the second radiator 200 in the dipole form is a dipole radiator, its electric length can be, for example, 0.5λ2, where λ2 is the operating wavelength corresponding to the resonant frequency f2 of the fundamental mode of the second radiator 200.

[0143] In other embodiments of this application, the second radiator 200 may also be a monopole radiator. The monopole-shaped second radiator 200 includes one radiating arm, and the antenna 10 may further include a ground plane, which can be equivalent to another radiating arm of the dipole-shaped second radiator 200. That is, one radiating arm of the dipole-shaped second radiator 200 in the embodiments shown in Figures 8A to 8D can be replaced with a ground plane. For ease of understanding, the specific structure of the second radiator 200 as a monopole radiator can be referred to the relevant description in the embodiment shown in Figure 17 below, and will not be described here.

[0144] In some implementations, the electrical length of the second radiator 200 in monopole form can be, for example, 0.25λ1, where λ1 is the operating wavelength corresponding to frequency f1.

[0145] After introducing the exemplary structures of the first radiator 100 and the second radiator 200, the exemplary configuration of the first radiator 100 and the second radiator 200 will be described below with reference to the accompanying drawings.

[0146] Figures 9A to 9D illustrate an exemplary configuration of the first radiator 100 and the second radiator 200 in the antenna 10 according to an embodiment of this application. Figure 9A is a top view of the antenna 10, and Figure 9B is a side view of the antenna 10. Figure 9C is a schematic diagram of the antenna 10 viewed along the Z1 direction in Figure 9B, and Figure 9D is a schematic diagram of the antenna 10 viewed along the Z2 direction in Figure 9B. For ease of observation, in Figure 9A, the area enclosed by solid lines and filled with grid lines shows the observable structure, the area enclosed by dashed lines and filled with dots shows the obscured structure, the dashed lines show the extension path of the first radiator 100, and the dotted-dash lines show the extension path of the second radiator 200.

[0147] Referring to Figures 9A to 8D, antenna 10 also includes a dielectric substrate 300. The dielectric substrate 300 is used to provide support for the first radiator 100 and the second radiator 200.

[0148] Specifically, along the thickness direction of the dielectric substrate 300 (e.g., the Z direction shown in Figure 9B), the dielectric substrate 300 includes an upper surface 301 and a lower surface 302 disposed opposite to each other. The Z direction is perpendicular to the X and Y directions. A first radiator 100 is disposed on the upper surface 301 of the dielectric substrate 300. A second radiator 200 may be disposed on the lower surface 302 of the dielectric substrate 300. The dielectric substrate 300 also has metallized vias 303 for connecting the first radiator 100 and the second radiator 200, facilitating parallel power supply of the first radiator 100 and the second radiator 200.

[0149] By placing the first radiator 100 and the second radiator 200 on the upper surface 301 and lower surface 302 of the dielectric substrate 300 respectively, the radiation capability of the antenna 10 can be made more uniform in different directions, thereby further reducing the directivity coefficient of the antenna 10, and thus enabling the antenna 10 to have better omnidirectional radiation capability, so as to provide more stable signal coverage and improve the robustness of the antenna 10 to signal fading and interference.

[0150] In some implementations, a first radiator 100 and a second radiator 200 can be formed on the upper surface 301 and lower surface 302 of the substrate 300, respectively, using a printing process.

[0151] In some implementations, the dielectric substrate 300 can be a flame-retardant material (FR-4) dielectric substrate, a Rogers dielectric substrate, or a hybrid dielectric substrate of Rogers and FR-4, and this application does not limit this. FR-4 is a designation for a flame-retardant material grade, and the Rogers dielectric substrate is a high-frequency substrate.

[0152] In some implementations, the first radiator 100 and the second radiator 200 are made of metallic materials (e.g., copper, aluminum, or silver), and the electrical conductivity of the metallic materials can be, for example, 2.17 × 10⁻⁶. 7 S / m, this application does not limit this.

[0153] Figure 10 illustrates the S11 parameters and overall efficiency of antenna 10 in this embodiment of the present application, based on Figure 9A. Referring to the S11 parameter curves in Figure 10, the operating passband of antenna 10 is the Wi-Fi 6G band (5.925GHz-7.125GHz). A portion of the signal in the Wi-Fi 6G band is radiated by the first radiator 100 operating in the fundamental mode, and another portion is radiated by the second radiator 200 operating in a higher-order mode.

[0154] Within the Wi-Fi 6GHz band, the S11 parameter of antenna 10 is less than -10dB, thus antenna 10 exhibits good impedance matching. Antenna 10 has two radiating poles: one corresponding to a frequency of approximately 6.1GHz with an S11 parameter of approximately -36.8dB; and the other corresponding to a frequency of approximately 7.5GHz with an S11 parameter of approximately -26.3dB. The good impedance matching between the two radiating poles allows antenna 10 to operate not only within the Wi-Fi 6GHz band but also at 7.5GHz.

[0155] Referring to the overall efficiency curve in Figure 10, within the Wi-Fi 6G band, the overall efficiency curve of antenna 10 is relatively flat, and the efficiency is close to 0dB. For example, the overall efficiency is greater than or equal to -0.3dB, and antenna 10 has good radiation performance.

[0156] The operating stopband of antenna 10 is the Wi-Fi 5G band (5.15GHz-5.85GHz). Within the Wi-Fi 5G band, the overall efficiency curve of antenna 10 drops sharply, forming an efficiency dip. The minimum point of the efficiency dip is a radiation null, which is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and second radiator 200. The frequency corresponding to this radiation null is approximately 5.3GHz. At 5.3GHz, the overall efficiency of antenna 10 drops to approximately -17dB, and the stopband attenuation is approximately greater than or equal to -8.3dB, indicating good suppression performance of antenna 10.

[0157] Figures 11A to 11D illustrate two exemplary configurations of the first radiator 100 and the second radiator 200 in the antenna 10 according to embodiments of this application. Figure 11A is a top view of the antenna 10, Figure 11B is a side view of the antenna 10, Figure 11C is a schematic diagram of the antenna 10 viewed along the Z1 direction in Figure 11B, and Figure 11D is a schematic diagram of the antenna 10 viewed along the Z2 direction in Figure 11B. For ease of observation, in Figure 11A, the area enclosed by solid lines and filled with grid lines shows the observable structure, the area enclosed by dashed lines and filled with dots shows the obscured structure, the dashed line shows the extension path of the first radiator 100, and the dotted-dash line shows the extension path of the second radiator 200.

[0158] Referring to Figures 11A to 11D, the antenna 10 includes a dielectric substrate 300. The structure of the dielectric substrate 300 is substantially the same as that of the dielectric substrate 300 in the embodiments shown in Figures 9A to 9D. Therefore, the relevant descriptions in the embodiments shown in Figures 9A to 9D can be referred to, and will not be repeated here.

[0159] In some embodiments of this application, different extensions in the first radiator 100 may be respectively disposed on the upper surface 301 and the lower surface 302 of the dielectric plate 300.

[0160] For example, in some implementations, the first radiator 100 includes a first extension 101 and a second extension 102. The first extension 101 forms a straight radiating arm, and the second extension 102 forms another straight radiating arm. The straight radiating arm formed by the first extension 101 is disposed on the lower surface 302 of the dielectric substrate 300, and the straight radiating arm formed by the second extension 102 is disposed on the upper surface 301 of the dielectric substrate 300.

[0161] In some embodiments of this application, different extensions of the second radiator 200 may also be disposed on the upper surface 301 and the lower surface 302 of the dielectric plate 300, respectively.

[0162] For example, in some implementations, the fourth extension 201 and the fifth extension 202 of the second radiator 200 are respectively disposed on the upper surface 301 and the lower surface 302 of the dielectric substrate 300. In this way, the fourth extension 201 and the fifth extension 202 of the second radiator 200 can be overlapped in the Z direction; that is, the fourth extension 201 in the orthographic projection area of ​​the first plane F1 at least partially overlaps with the fifth extension 202 in the orthographic projection area of ​​the first plane F1. This reduces the distance between the fourth extension 201 and the fifth extension 202, thereby further improving the coupling effect between them.

[0163] It is understood that Figures 9A to 9D and 11A to 11D above are only schematic representations of some arrangements of the first radiator 100 and the second radiator 200, and do not constitute a limitation on this application.

[0164] Referring again to FIG11A, in some embodiments of this application, the antenna 10 may further include a U-shaped coupling stub 400. The fourth extension 201 and the fifth extension 202 of the second radiator 200 are located in the opening of the U-shaped coupling stub 400 in the orthographic projection region of the first plane F1.

[0165] Specifically, the U-shaped coupling branch 400 may include a first branch 401, a second branch 402, and a third branch 403. The first branch 401 and the second branch 402 respectively form the two sidewalls of the U-shaped coupling branch 400, and the third branch 403 forms the bottom wall of the U-shaped coupling branch 400.

[0166] Along the X direction, the fourth extension segment 201 and the fifth extension segment 202 are located in the orthographic projection area of ​​the first branch 401 and the second branch 402 in the orthographic projection area of ​​the first plane F1, respectively. Along the Y direction, the fourth extension segment 201 and the fifth extension segment 202 are positioned opposite the third branch 403 in the orthographic projection area of ​​the first plane F1. Thus, the fourth extension segment 201 and the fifth extension segment 202 of the second radiator 200 are inserted into the opening along the Y direction in the orthographic projection area of ​​the first plane F1.

[0167] When the second radiator 200 operates in a specific frequency band, it enables the first branch 401 of the U-shaped coupling stub 400 to generate a first coupling current and the second branch 402 to generate a second coupling current. The first and second coupling currents are equal-amplitude and opposite-phase currents to the currents of the fourth extension 201 and the fifth extension 202, respectively, thus canceling each other out and forming a radiation null. For example, the first coupling current can cancel out the current of the fourth extension 201 with equal amplitude and opposite phase, and the second coupling current can cancel out the current of the fifth extension 202 with equal amplitude and opposite phase; alternatively, the first coupling current can also cancel out the current of the fifth extension 202 with equal amplitude and opposite phase, and the second coupling current can cancel out the current of the fourth extension 201 with equal amplitude and opposite phase.

[0168] Thus, antenna 10 can have two radiation nulls. One radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and second radiator 200, while the other radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the mutually coupled second radiator 200 and U-shaped coupling stub 400. When the frequencies corresponding to the two radiation nulls are close, antenna 10 has better suppression performance in the operating stopband; when the frequencies corresponding to the two radiation nulls are far apart, antenna 10 can have two operating stopbands to meet the usage requirements of different application scenarios, thus broadening its applicability.

[0169] Referring again to FIG11A, in some embodiments of this application, antenna 10 may include a guiding structure 500. The guiding structure 500 is located to the right of the first radiator 100 in the orthographic projection area of ​​the first plane F1, that is, the first radiator 100 is on the side of the first plane F1 opposite to the second radiator 200 in the orthographic projection area of ​​the first plane F1.

[0170] By setting the guiding structure 500, the directivity coefficient of the antenna 10 can be reduced, giving it better omnidirectional radiation capability. Specifically, without the guiding structure 500, the antenna 10 relies on the first radiator 100 and the second radiator 200 to radiate electromagnetic waves. Therefore, the electromagnetic waves radiated by the antenna 10 mainly propagate to the left side of the orthographic projection area of ​​the first radiator 100 in the first plane F1. This left side refers to the side of the orthographic projection area of ​​the first radiator 100 facing the orthographic projection area of ​​the second radiator 200 in the first plane F1. It can be understood that the left and right sides of the orthographic projection area of ​​the first radiator 100 are opposite along the Y-direction. After setting the guiding structure 500, it can guide some of the electromagnetic waves to propagate to the right side of the orthographic projection area of ​​the first radiator 10 in the first plane F1, thereby making the propagation direction of the electromagnetic waves radiated by the antenna 10 more uniform and reducing the directivity coefficient of the antenna 10.

[0171] It is understood that this application does not limit the structural form of the guiding structure 500, as long as it can adjust the radiation direction of the antenna 10. For example, in the embodiment shown in Figure 11A, the guiding structure 500 may include an L-shaped metal strip 501 and a straight metal strip 502. In other embodiments, the guiding structure 500 may also be other structures. For example, the guiding structure 500 may also include an L-shaped metal strip 501 but not a straight metal strip 502. Similarly, the guiding structure 500 may also include a straight metal strip 502 but not an L-shaped metal strip 501. Furthermore, the guiding structure 500 may also be a rectangular metal sheet or other irregular structure.

[0172] Figure 12, based on Figure 11A, illustrates the S11 parameters and overall efficiency of antenna 10 in an embodiment of this application. Referring to the S11 parameter curves in Figure 12, the operating passband of antenna 10 is the Wi-Fi 6G band (5.925GHz-7.125GHz). A portion of the signal in the Wi-Fi 6G band is radiated by the first radiator 100 operating in the fundamental mode, and another portion is radiated by the second radiator 200 operating in a higher-order mode.

[0173] Within the Wi-Fi 6GHz band, the S11 parameter of antenna 10 is less than -10dB, therefore, antenna 10 has good impedance matching. Antenna 10 has two radiating poles: one radiating pole corresponds to a frequency of approximately 6GHz, with a corresponding S11 parameter of approximately -18dB; the other radiating pole corresponds to a frequency of approximately 6.5GHz, with a corresponding S11 parameter of approximately -14dB. Antenna 10 exhibits good impedance matching between its two radiating poles.

[0174] Referring to the overall efficiency curve in Figure 12, within the Wi-Fi 6G band, the overall efficiency curve of antenna 10 is relatively flat and the efficiency is close to 0dB. For example, the overall efficiency is greater than or equal to -1.4dB, and antenna 10 has good radiation performance.

[0175] The operating stopband of antenna 10 is the Wi-Fi 5G band (5.15GHz-5.85GHz). Within the Wi-Fi 5G band, the overall efficiency curve of antenna 10 drops sharply, forming two efficiency dips. The minimum points of these two efficiency dips are two radiation nulls. One radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and second radiator 200. The other radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the mutually coupled second radiator 200 and U-shaped coupling stub 400. The frequencies corresponding to the two radiation nulls are 5.6GHz and 5.8GHz, respectively. At 5.6GHz, the overall efficiency of antenna 10 decreases to approximately -13dB; at 5.8GHz, the overall efficiency decreases to approximately -12dB, indicating good suppression performance of antenna 10. The stopband attenuation of antenna 10 is approximately greater than or equal to -10dB. The relative bandwidth of the filtering band of antenna 10 is only 0.09GHz, and the relative bandwidth of the transition band is approximately 1.5%.

[0176] In some embodiments of this application, the antenna 10 may also include more parallel-fed radiators, such as three, four, or five. Exemplary examples are described below.

[0177] Specifically, Figures 13A and 13B illustrate an exemplary structure of an antenna 10 including a third radiator 600 in an embodiment of this application, wherein Figure 13A is a top view of the antenna 10 and Figure 13B is a side view of the antenna 10. For ease of observation, in Figure 13A, the area enclosed by solid lines and filled with grid lines shows the observable structure, the area enclosed by dashed lines and filled with dots shows the obscured structure, the extension path of the first radiator 100 is shown by dashed lines, and the extension path of the second radiator 200 is shown by dotted lines.

[0178] Referring to Figures 13A and 13B, antenna 10 may further include a third radiator 600. The third radiator 600 is connected to the feed point P. The resonant frequency of the fundamental mode of the third radiator 600 is frequency f4.

[0179] The operating passband of antenna 10 may also include the resonant frequency f4 of the fundamental mode of the third radiator 600. Furthermore, the resonant frequency f4 of the fundamental mode of the third radiator 600 is different from the resonant frequency f1 of the fundamental mode of the first radiator 100 and the resonant frequency f2 of the fundamental mode of the second radiator 200. Thus, antenna 10 can have more operating passbands to meet the needs of different application scenarios and has a wider range of applications.

[0180] Secondly, at a certain frequency between frequency f1 and frequency f3, the first radiator 100 and the third radiator 600 can generate currents of equal amplitude and opposite phase, thus canceling out the currents of the first radiator 100 and the third radiator 600, thereby forming a radiation null. At a certain frequency between frequency f2 and frequency f3, the second radiator 200 and the third radiator 600 can generate currents of equal amplitude and opposite phase, thus canceling out the currents of the second radiator 200 and the third radiator 600, thereby forming a radiation null. In this way, the antenna 10 can have multiple radiation nulls. When the frequencies corresponding to the multiple radiation nulls are close, the antenna 10 has a better suppression effect in the operating stopband; when the frequencies corresponding to the multiple radiation nulls are far apart, the antenna 10 can have multiple operating stopbands to meet the usage requirements of different application scenarios, thus having a wider range of applications.

[0181] It should be noted that the specific structural dimensions of the third radiator 600 are substantially the same as those of the first radiator 100 described above. Therefore, the relevant descriptions in the embodiments shown in Figures 7A and 7B can be referred to, and will not be repeated here.

[0182] To more intuitively understand the performance of the antenna 10 with three radiators provided in this application, the following description is based on the S11 parameters of the antenna 10 and schematic diagrams such as efficiency curves.

[0183] Figure 14, based on Figure 13A, illustrates the S11 parameters and overall efficiency of antenna 10 in this embodiment of the application. Referring to the S11 parameter curves in Figure 14, the operating passband of antenna 10 is the Wi-Fi 2.4G band (2.4GHz-2.485GHz) and the Wi-Fi 5G band (5.15GHz-5.85GHz). The Wi-Fi 2.4G band signal is radiated by the third radiator 600 operating in the fundamental mode, while a portion of the Wi-Fi 5G band signal is radiated by the first radiator 100 operating in the fundamental mode, and another portion is radiated by the second radiator 200 operating in a higher-order mode.

[0184] Within the Wi-Fi 2.4G and Wi-Fi 5G bands, the S11 parameter of antenna 10 is less than -10dB, therefore, antenna 10 has good impedance matching. Antenna 10 has three radiating poles: the first radiating pole corresponds to an efficiency of approximately 2.4GHz and an S11 parameter of approximately -24dB; the second radiating pole corresponds to an efficiency of approximately 5.2GHz and an S11 parameter of approximately -17dB; and the third radiating pole corresponds to an efficiency of approximately 5.4GHz and an S11 parameter of approximately -22dB. Antenna 10 exhibits good impedance matching at these three radiating poles.

[0185] Referring to the overall efficiency curve in Figure 14, the overall efficiency curve of antenna 10 is relatively flat in the Wi-Fi 2.4G and Wi-Fi 5G frequency bands, with an overall efficiency of approximately -2.7dB or greater, indicating that antenna 10 has good radiation performance.

[0186] The operating stopband of antenna 10 is the N79 band (4.4GHz-5GHz). Within the N79 band, the overall efficiency curve of antenna 10 drops sharply, forming two efficiency dips. The minimum points of these two efficiency dips are two radiation nulls. One radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and second radiator 200. The other radiation null is formed by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed first radiator 100 and third radiator 600, or by the equal-amplitude, opposite-phase cancellation of the currents from the parallel-fed second radiator 200 and third radiator 600. The frequencies corresponding to the two radiation nulls are approximately 4.2GHz and 4.8GHz. At 4.2GHz, the overall efficiency of antenna 10 decreases to approximately -23dB; at 4.8GHz, the overall efficiency decreases to approximately -17.4dB, indicating good suppression performance of antenna 10. The stopband attenuation of antenna 10 is approximately greater than or equal to -11dB. The relative bandwidth of the filter band of antenna 10 is only 0.09 GHz, and the relative bandwidth of the transition band is about 3%.

[0187] Referring again to Figure 13A, in some embodiments of this application, the third radiator 600 may be positioned close to the first radiator 100 or the second radiator 200 to enhance the radiation effect of the third radiator 600.

[0188] For example, in some implementations, the distance between the third radiator 600 and the first radiator 100 in the orthographic projection region of the first plane F1 is 0.001λ1-0.01λ1, such as 0.001λ1, 0.002λ1, 0.003λ1 or 0.004λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator.

[0189] For example, in some other implementations, the distance between the third radiator 600 and the first radiator 100 in the orthographic projection region of the first plane F1 is 0.001λ1-0.01λ1, such as 0.001λ1, 0.002λ1, 0.003λ1 or 0.004λ1.

[0190] It is understood that this application does not specifically limit the orientation of the third radiator 600. For example, in the embodiment shown in FIG13A, the third radiator 600 is located in the orthographic projection area of ​​the first plane F1, between the orthographic projection area of ​​the first radiator 100 and the orthographic projection area of ​​the second radiator 200 in the first plane F1. In other embodiments, the third radiator 600 in the orthographic projection area of ​​the first plane F1 may also be located on the side of the first radiator 100 in the orthographic projection area of ​​the first plane F1 that faces away from the orthographic projection area of ​​the second radiator 200 in the first plane F1, or on the side of the second radiator 200 in the orthographic projection area of ​​the first plane F1 that faces away from the orthographic projection area of ​​the first radiator 100 in the first plane F1.

[0191] Based on the antenna 10 in the above embodiments, this application also provides an antenna array including multiple antennas 10 (e.g., two, three, four, or five, etc.), with multiple antennas 10 connected to the same feed point. In this way, omnidirectional electromagnetic coverage can be achieved, thereby further expanding the scope of application. The following is a detailed description in conjunction with the accompanying drawings.

[0192] Figure 15 illustrates an exemplary structure of the antenna array 2 in an embodiment of this application. For ease of observation, the area enclosed by solid lines and filled with grid lines in Figure 15 shows the structure disposed on the upper surface of the dielectric substrate, while the area filled with solid lines and dots shows the structure disposed on the lower surface of the dielectric substrate.

[0193] Referring to Figure 15, the antenna array 2 may include, for example, three antennas 10. The three antennas 10 are connected to the same feed point P and are rotationally symmetrical about feed point P. Feed point P is the connection point between the feed line (not shown) and the three antennas 10. When a signal is fed to the three antennas 10 via feed point P, the signal can be split into three parts, feeding each antenna 10 with equal amplitude and in phase. That is, feed point P is used to feed the three antennas 10 in parallel.

[0194] In this embodiment, the structure of antenna 10 is substantially the same as that of antenna 10 in the embodiment shown in FIG13A above. Therefore, the relevant description in the embodiment shown in FIG13A above can be referred to, and will not be repeated here. In other embodiments, antenna 10 may also have other structural forms, such as the structural forms in the embodiments shown in FIG2 to FIG11D above. This application does not impose specific limitations on this.

[0195] To more intuitively understand the radiation effect of the antenna array 2 provided in this application, the following description is based on schematic diagrams of the S11 parameters, overall efficiency, and radiation pattern of the antenna array 2.

[0196] Figure 16A illustrates the S11 parameters and overall efficiency of antenna array 2 in this embodiment of the present application, based on Figure 15. Referring to the S11 parameter curves in Figure 16A, the operating passband of antenna array 2 is the Wi-Fi 2.4G (2.4GHz-2.485GHz) and Wi-Fi 5G (5.15GHz-5.85GHz) bands. Within the Wi-Fi 2.4G band, the S11 parameters of antenna array 2 are approximately less than -5dB; within the Wi-Fi 5G band, the S11 parameters of antenna array 2 are less than -10dB. Therefore, antenna array 2 exhibits good impedance matching.

[0197] Referring to the overall efficiency curve in Figure 16A, the overall efficiency of antenna 10 is approximately -2dB or greater in the Wi-Fi 2.4G band and approximately -2.7dB or greater in the Wi-Fi 5G band, indicating good radiation performance. The operating stopband of antenna array 2 is the N79 band, and within this band, the overall efficiency of antenna array 2 is approximately -10dB or less, demonstrating good suppression performance of antenna 10.

[0198] Figure 16B shows the radiation pattern of antenna array 2 at 2.4 GHz in an embodiment of this application, based on Figure 15. Figure 16C shows the radiation pattern of antenna array 2 at 5.5 GHz in an embodiment of this application, based on Figure 15. Referring to Figures 16B and 16C, at 2.4 GHz and 5.5 GHz, the beam radiated by antenna array 2 is an omnidirectional wide beam, resembling an apple shape, and the beam coverage effect of antenna array 2 is excellent.

[0199] It is understood that Figure 15 above only schematically illustrates a partial structural form of the antenna array 2 and does not constitute a limitation on this application. For example, in other embodiments, the antenna array 2 may also include four antennas 10 arranged in a cross shape. Furthermore, in some other embodiments, the antenna array 2 may also include two antennas 10 arranged in a straight line.

[0200] It should be noted that this embodiment is an exemplary description of the technical solution of this application, and those skilled in the art can make other modifications. For example, in this embodiment, both the first radiator 100 and the second radiator 200 are dipole radiators; therefore, the antenna 10 is a dipole filter antenna. In some other embodiments, the first radiator 100 and the second radiator 200 can also be monopole radiators, and the antenna 10 can also be a monopole filter antenna.

[0201] For example, FIG17 shows a schematic diagram of the structure of antenna 10' in some other embodiments of this application. Referring to FIG17, antenna 10' includes a first radiator 100, a second radiator 200, and a ground plane G.

[0202] The first radiator 100 includes a first extension 101. The antenna 10 also includes a ground plane G. The first extension 101 extends along the X direction. Furthermore, the first extension 101 and the ground plane G are positioned opposite each other along the X direction in the orthographic projection area of ​​the first plane F1. One end of the first extension 101 and the ground plane G are both connected to a feed point.

[0203] Thus, the first extension 101 constitutes one radiating arm of the first radiator 100, and the floor G can be equivalent to the other radiating arm of the first radiator 100. That is, one radiating arm of the dipole-shaped first radiator 100 in the embodiments shown in Figures 7A and 7B can be replaced with the floor G in the embodiment shown in Figure 17.

[0204] The second radiator 200 includes a fourth extension 201 and a sixth extension 203. The fourth extension 201 extends along the Y direction. The fourth extension 201 is positioned opposite the floor G in the X direction within the orthographic projection region of the first plane F1. Furthermore, the distance d1 between the fourth extension 201 and the floor G in the orthographic projection region of the first plane F1 can be 0-0.05λ1, for example, 0, 0.01λ1, 0.02λ1, or 0.03λ1, etc. λ1 is the operating wavelength corresponding to the resonant frequency f1 of the fundamental mode of the first radiator 100.

[0205] One end of the fourth extension 201 (e.g., end 201a) and the floor G are both connected to the power supply point P. The other end of the fourth extension 201 (e.g., end 201b) is connected to the sixth extension 203. The sixth extension 203 extends away from the floor G in the X direction.

[0206] Thus, the fourth extension segment 201 and the sixth extension segment 203 together constitute one radiating arm of the second radiator 200, and the floor G can be equivalent to the other radiating arm of the second radiator 200. That is, one radiating arm of the dipole-shaped second radiator 200 in the embodiments shown in Figures 8A to 8D can be replaced with the floor G in the embodiment shown in Figure 17.

[0207] In some embodiments of this application, the floor G can be made of a conductive material. In some implementations, the conductive material can be any of the following: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate and tin-plated copper, cloth impregnated with graphite powder, a graphite-coated substrate, a copper-plated substrate, a brass-plated substrate, and an aluminum-plated substrate. Those skilled in the art will understand that the floor G can also be made of other conductive materials.

[0208] It is understood that antenna array 2 may also include multiple monopole filter antennas, thereby forming a monopole filter antenna array. The structure of the monopole filter antenna can be referred to the description of the monopole-shaped antenna 10 in the embodiment shown in Figure 17 above, and will not be repeated here.

[0209] The following describes a comparison between the antenna provided in the embodiments of this application and antennas in some other technical solutions.

[0210] Specifically, Figure 18 shows a schematic diagram of the antenna 10a in some technical solutions. Referring to Figure 18, the antenna 10a includes a left radiator 100a, a middle radiator 200a, and a right radiator 300a arranged at intervals. The left radiator 100a is U-shaped, with the concave portion facing the middle radiator 200a. The middle radiator 200a is rectangular. The right radiator 300a is convex, with the convex portion facing the middle radiator 200a.

[0211] Electrical coupling, or capacitive coupling, can be achieved between the left radiator 100a and the intermediate radiator 200a through the first gap G1. For example, the coupling between the left radiator 100a and the intermediate radiator 200a forms an equivalent capacitance to achieve signal transmission. Therefore, in the low-frequency band, equal-amplitude, opposite-phase currents can be generated on the left radiator 100a and the intermediate radiator 200a. The currents in the left radiator 100a and the intermediate radiator 200a cancel each other out, thereby forming a radiation null point in the low-frequency band.

[0212] Magnetic coupling, i.e., mutual inductance coupling, can be generated between the intermediate radiator 200a and the right radiator 300a through the second gap G2. For example, there is mutual inductance between the intermediate radiator 200a and the right radiator 300a, so that the current change of one radiator affects the other radiator through mutual inductance. Therefore, in the high-frequency band, equal-amplitude, opposite-phase currents can be generated on the intermediate radiator 200a and the right radiator 300a. The currents of the intermediate radiator 200a and the right radiator 300a cancel each other out, thus forming a radiation null in the high-frequency band. The radiation null in the high-frequency band and the radiation null in the low-frequency band together constitute the operating stopband of the antenna 10a.

[0213] It is worth noting that the aforementioned antenna 10a generates a radiation null through coupling between different radiators, requiring high manufacturing precision to accurately control the coupling amount. Controlling the coupling amount is challenging, resulting in poor isolation between antenna 10a and other antennas in the operating stopband. For example, the gain of antenna 10a in the operating stopband is less than or equal to -5dB, indicating poor suppression. In contrast, in this embodiment, a radiation null is formed by parallel feeding of the first radiator 100 and the second radiator 200, rather than through coupling. Therefore, adjusting the coupling amount is unnecessary, making it easier to form a radiation null and obtain the desired operating stopband.

[0214] Compared to the antenna 10a in the scheme shown in Figure 18 above, the antenna 10 provided in this application has a simple and compact structure, does not increase size and cost, does not introduce additional insertion loss, has lower processing accuracy requirements, can achieve a narrower transition band and higher out-of-band suppression, and has strong anti-interference capability.

[0215] The specific embodiments described above illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with some embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details have been omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0216] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "outer", "inner", "circumferential", "radial", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0217] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "fit" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0218] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An antenna, characterized in that, Including a first radiator and a second radiator, wherein: The first and second radiators are connected to the same feed point; The operating passband of the antenna includes the resonant frequency of the fundamental mode of the first radiator, and the resonant frequency of the fundamental mode of the first radiator is different from the resonant frequency of the fundamental mode of the second radiator. Within the frequency band between the resonant frequency of the fundamental mode of the first radiator and the resonant frequency of the fundamental mode of the second radiator, the first radiator and the second radiator form equal-amplitude, opposite-phase currents.

2. The antenna according to claim 1, characterized in that, The first radiator and the second radiator are either dipole radiators or monopole radiators.

3. The antenna according to claim 2, characterized in that, The first radiator is the dipole radiator, which includes a first extension and a second extension. Wherein, both the first extension segment and the second extension segment extend along a first direction, and the first extension segment in the orthographic projection area of ​​the first plane and the second extension segment in the orthographic projection area of ​​the first plane are arranged opposite to each other along the first direction, and the first direction is parallel to the first plane. One end of the first extension and one end of the second extension are both connected to the power supply point.

4. The antenna according to claim 3, characterized in that, The first radiator further includes a third extension, the other end of which is connected to the third extension. The third extension extends along a second direction, and the angle between the second direction and the first direction is greater than 0°.

5. The antenna according to claim 2, characterized in that, The electric length of the first radiator is 0.5λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator.

6. The antenna according to claim 2, characterized in that, The first radiator is a monopole radiator, including a first extension section, and the antenna also includes a ground plane; Wherein, the first extension segment extends along a first direction, and the first extension segment in the orthographic projection area of ​​the first plane is disposed opposite to the floor in the orthographic projection area of ​​the first plane along the first direction, and the first direction is parallel to the first plane; One end of the first extension and the floor are both connected to the power supply point.

7. The antenna according to claim 2, characterized in that, The second radiator is the dipole radiator, including a fourth extension segment, a fifth extension segment, a sixth extension segment, and a seventh extension segment; Wherein, the fourth extension segment and the fifth extension segment both extend along the second direction, and the fourth extension segment in the orthographic projection area of ​​the first plane and the fifth extension segment in the orthographic projection area of ​​the first plane are arranged opposite each other along the first direction, and the distance between the fourth extension segment in the orthographic projection area of ​​the first plane and the fifth extension segment in the orthographic projection area of ​​the first plane is 0-0.05λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator, and the first direction and the second direction are both parallel to the first plane, and the angle between the first direction and the second direction is greater than 0°; One end of the fourth extension segment and one end of the fifth extension segment are both connected to the feed point. The other end of the fourth extension segment is connected to the sixth extension segment, and the other end of the fifth extension segment is connected to the seventh extension segment. The extension directions of the sixth extension segment and the seventh extension segment are opposite and parallel to the first direction.

8. The antenna according to claim 2, characterized in that, The second radiator is the dipole radiator, including a fourth extension segment, a fifth extension segment, a sixth extension segment, and a seventh extension segment; Wherein, both the fourth extension segment and the fifth extension segment extend along the second direction, and the orthographic projection area of ​​the fourth extension segment on the first plane at least partially overlaps with the orthographic projection area of ​​the fifth extension segment on the first plane, and the second direction is parallel to the first plane; One end of the fourth extension segment and one end of the fifth extension segment are respectively connected to the power supply point. The other end of the fourth extension segment is connected to the sixth extension segment, and the other end of the fifth extension segment is connected to the seventh extension segment. The extension directions of the sixth extension segment and the seventh extension segment are opposite and parallel to the first direction. The angle between the first direction and the second direction is greater than 0°.

9. The antenna according to claim 8, characterized in that, The antenna includes a dielectric substrate, and along the thickness direction of the dielectric substrate, the fourth extension segment and the fifth extension segment are respectively disposed on two opposite surfaces of the dielectric substrate.

10. The antenna according to any one of claims 1 to 8, characterized in that, The antenna includes a dielectric substrate, and along the thickness direction of the dielectric substrate, the first radiator and the second radiator are respectively disposed on two opposite surfaces of the dielectric substrate.

11. The antenna according to claim 7 or 8, characterized in that, The antenna includes a U-shaped coupling stub, and the fourth extension and the fifth extension are located in the opening of the orthographic projection area of ​​the U-shaped coupling stub in the first plane.

12. The antenna according to claim 1, characterized in that, The antenna includes a guiding structure, which is located in the orthographic projection region of a first plane on the side opposite to the orthographic projection region of the second radiator in the first plane, and the first plane is parallel to the extension direction of the first radiator.

13. The antenna according to claim 1, characterized in that, The antenna includes a third radiator, which is connected to the feed point; The operating passband of the antenna includes the resonant frequency of the fundamental mode of the third radiator, and the resonant frequency of the fundamental mode of the third radiator is different from the resonant frequency of the fundamental mode of the first radiator and the resonant frequency of the fundamental mode of the second radiator. Between the resonant frequency of the fundamental mode of the first radiator and the resonant frequency of the fundamental mode of the third radiator, the first radiator and the third radiator form an equal-amplitude, opposite-phase current. Between the resonant frequency of the fundamental mode of the second radiator and the resonant frequency of the fundamental mode of the third radiator, the second radiator and the third radiator form an equal-amplitude, opposite-phase current.

14. The antenna according to claim 13, characterized in that, The distance between the orthographic projection region of the third radiator on the first plane and the orthographic projection region of the first radiator on the first plane is 0.001λ1-0.01λ1, where λ1 is the operating wavelength corresponding to the resonant frequency of the fundamental mode of the first radiator, and the first plane is parallel to the extension directions of the first radiator and the second radiator; or The distance between the orthographic projection area of ​​the third radiator on the first plane and the orthographic projection area of ​​the second radiator on the first plane is 0.001λ1-0.01λ1.

15. An antenna array, characterized in that, It includes a plurality of antennas as described in any one of claims 1 to 14, wherein the plurality of antennas are connected to the same feed point.

16. A wireless communication module, characterized in that, Includes a radio frequency front-end module and an antenna as described in any one of claims 1 to 14, wherein the antenna is connected to the radio frequency front-end module; or It includes a radio frequency front-end module and the antenna array as described in claim 15, wherein the antenna array is connected to the radio frequency front-end module.

17. A terminal, characterized in that, It includes a housing and the wireless communication module as described in claim 16, the wireless communication module being disposed on the housing.

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