Antenna module and electronic equipment

Abstract

The invention discloses an antenna module and electronic equipment, and the antenna module comprises a first radiator which is provided with a first end and a second end in the extension direction of the first radiator; the filter circuit is connected with a first position of the first radiator, the first position is located between the first end and the second end, the filter circuit comprises M filter branches which are connected in parallel, and M is greater than or equal to 2; and the feed circuit is connected with the second position of the first radiator, and receives and transmits a target radiation signal at least through the first radiator. Wherein different filtering branches and the first part of the first radiator form current paths with different electrical lengths, and the current paths are used for transmitting and receiving radiation signals with different frequency bands.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and particularly to an antenna module and an electronic device. Background Art

[0002] With the rapid development of mobile communication technology and the popularization of multifunctional intelligent terminals, the antenna design in electronic devices needs to take into account requirements such as multiple frequency bands, high performance, and miniaturization. Especially in the design of multi-band antennas that support key frequency bands such as GPS L5 (1.176 GHz), N77 (3.3 - 4.2 GHz), and Wi-Fi 5G (5.15 - 5.85 GHz), how to balance the requirements of multi-band, high performance, and miniaturization of the antenna module has become a research hotspot for those skilled in the art. Summary of the Invention

[0003] In view of the above problems, this application provides an antenna module and an electronic device. The specific solutions are as follows:

[0004] An antenna module, comprising:

[0005] A first radiator, the first radiator having a first end and a second end along its extending direction;

[0006] A filtering circuit connected to a first position of the first radiator, the first position being between the first end and the second end, the filtering circuit including M parallel filtering branches, M≥2;

[0007] A feeding circuit, the feeding circuit connected to a second position of the first radiator, at least receiving and transmitting a target radiation signal through the first radiator;

[0008] Wherein, different filtering branches and a first part of the first radiator form current paths with different electrical lengths for realizing the receiving and transmitting of radiation signals in different frequency bands.

[0009] Optionally, the length between the first end and the second end of the first radiator is a first length, and the first length is not less than a target ratio of the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator;

[0010] The first frequency band is the lowest frequency band among the radiation signals received and transmitted by the antenna module.

[0011] Optionally, the filtering circuit includes a first filtering branch and at least one second filtering branch, and the length of the current path formed by the first filtering branch and a first part of the first radiator satisfies a first target condition with respect to the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator;

[0012] The frequency of the second frequency band is higher than the frequency of the first frequency band.

[0013] Optionally, a portion of the first radiator between the first end and the first position is the first portion, and the length of the first portion satisfies a first target condition with respect to the wavelength of the radiation signal in the second frequency band transmitted and received by the first radiator;

[0014] The second frequency band is the sub-low frequency band among the radiation signals transmitted and received by the antenna module.

[0015] Optionally, the second filtering branch includes a capacitive element, and the length of the current path formed by the second filtering branch and the first portion of the first radiator satisfies a second target condition with respect to the wavelength of the radiation signal in the third frequency band transmitted and received by the first radiator, and the frequency of the third frequency band is higher than the frequency of the second frequency band;

[0016] and / or

[0017] The second filtering branch includes an inductive element and a capacitive element connected in series, and the length of the current path formed by the second filtering branch and the first portion of the first radiator satisfies a third target condition with respect to the wavelength of the radiation signal in the fourth frequency band transmitted and received by the first radiator, and the frequency of the fourth frequency band is higher than the frequency of the second frequency band.

[0018] Optionally, the length between the first end and the second end of the first radiator is a first length, and the first length is greater than a target ratio of the wavelength of the radiation signal in the first frequency band transmitted and received by the first radiator;

[0019] The length between the first end and the third position of the first radiator satisfies a fourth target condition with respect to the wavelength of the radiation signal in the first frequency band transmitted and received by the first radiator;

[0020] The length between the second end and the third position of the first radiator satisfies the first target condition with respect to the wavelength of the radiation signal in the second frequency band transmitted and received by the first radiator, and the frequency of the second frequency band is higher than the frequency of the first frequency band.

[0021] Optionally, a portion of the first radiator between the first end and the second position is the second portion of the radiator, and the length of the second portion satisfies a second target condition with respect to the wavelength of the radiation signal in the third frequency band transmitted and received by the first radiator;

[0022] wherein the frequency of the third frequency band is higher than the frequency of the second frequency band.

[0023] Optionally, the feeding circuit includes: an isolation branch between the second position of the first radiator and the ground end, and the isolation branch is used to isolate the interference of the radiation signal received and transmitted by the second portion to the radiation signal received and transmitted by the first portion.

[0024] Optionally, it further includes:

[0025] A second radiator, having an insulating gap between the second radiator and the first end of the first radiator, the feeding circuit further transmitting and receiving a target radiation signal through the second radiator, and the radiation signal transmitted and received by the second radiator being different from the radiation signal transmitted and received by the first radiator;

[0026] And / or,

[0027] A third radiator, having an insulating gap between the second radiator and the second end of the first radiator, the feeding circuit further transmitting and receiving a target radiation signal through the third radiator, and the radiation signal transmitted and received by the third radiator being different from the radiation signal transmitted and received by the first radiator.

[0028] An electronic device, including an antenna module, the antenna module including:

[0029] A first radiator, having a first end and a second end along its extending direction;

[0030] A filtering circuit connected to a first position of the first radiator, the first position being between the first end and the second end, and the filtering circuit including M parallel filtering branches, M≥2;

[0031] A feeding circuit, connected to a second position of the first radiator, and at least transmitting and receiving a target radiation signal through the first radiator;

[0032] Wherein, different filtering branches and a first part of the first radiator form current paths with different electrical lengths for realizing the transmission and reception of radiation signals in different frequency bands. Description of the Drawings

[0033] Combined with the drawings and referring to the following specific embodiments, the above and other features, advantages and aspects of the embodiments of the present disclosure will become more obvious. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the original elements and elements are not necessarily drawn to scale.

[0034] Figure 1 It is a schematic structural diagram of an antenna module provided by the present application;

[0035] Figure 2 It is a schematic structural diagram of a filtering circuit in an antenna module provided by the present application;

[0036] Figure 3 It is a schematic structural diagram of a feeding circuit in an antenna module provided by the present application;

[0037] Figure 4Schematic diagram of the radiation efficiency and reflection coefficient curves of the radiation signals of different frequency bands for the transceiver of an antenna module provided by this application. Detailed implementation manners

[0038] The following will clearly and completely describe the embodiments in this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0039] Without departing from the spirit or scope of this application, various modifications and variations can be made in this application, which are obvious to those skilled in the art. Therefore, this application is intended to cover the modifications and variations of this application that fall within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation manners provided in the embodiments of this application can be combined with each other without conflict.

[0040] To make the above objects, features, and advantages of this application more obvious and understandable, the following further describes this application in detail with reference to the drawings and specific implementation manners.

[0041] As described in the background art section, the requirements for multi-band, high-performance, and miniaturization of antenna modules have become a research hotspot for those skilled in the art.

[0042] Regarding the multi-band antenna design of current antenna modules for supporting key frequency bands such as GPS L5 (1.176 GHz), N77 (3.3 - 4.2 GHz), and Wi-Fi 5G (5.15 - 5.85 GHz), certain progress has been made in research, but there are still many challenges, specifically including:

[0043] a. Ensuring that the antenna operates in three frequency bands, including the low-frequency band (GPS L5), the middle-frequency band (N77), and the high-frequency band (Wi-Fi 5G), makes the development of the antenna module face multiple challenges such as large frequency span, space limitation, and performance optimization.

[0044] b. The space of intelligent electronic devices is limited, and the antenna module must occupy the smallest space while maintaining good antenna performance.

[0045] c. Ensuring the minimization of interference and mutual coupling between antennas of different frequency bands.

[0046] d. The position of the antenna module in the electronic device close to other electronic components in the electronic device (including the display, battery, and metal housing) may cause the antenna to be detuned.

[0047] In view of this, an embodiment of the present application provides an antenna module, as Figure 1 shown. The antenna module includes:

[0048] A first radiator 10, the first radiator 10 having a first end 01 and a second end 05 along its extending direction;

[0049] A filtering circuit 20 connected to a first position 03 of the first radiator 10, the first position 03 being located between the first end 01 and the second end 05, as Figure 2 shown. The filtering circuit 20 includes M parallel filtering branches, M≥2;

[0050] A feeding circuit 30, the feeding circuit 30 being connected to a second position 02 of the first radiator 10, and at least receiving and transmitting a target radiation signal through the first radiator.

[0051] It should be noted that in Figure 1 , the filtering circuit is electrically connected to the first position 03 of the first radiator 10 through a position SW, and the feeding circuit 30 is signal-connected to the second position 02 of the first radiator through a position A2. Optionally, the reference ground can be the ground on the circuit board where the feeding circuit and the filtering circuit are located, but the present application does not limit this, and it depends on the specific situation.

[0052] Optionally, in an embodiment of the present application, the filtering circuit is implemented by at least one of a capacitor and an inductor, so that the filtering circuit only includes a capacitor and / or an inductor, and the required occupied space is small, which is beneficial to the miniaturization of the antenna module and is less restricted by the space in the electronic device to which the antenna module is applied.

[0053] It should be noted that in this embodiment, the part of the first radiator 10 between the first end 01 and the first position 03 is the first part of the first radiator 10. Different filtering branches and the first part of the first radiator form current paths with different electrical lengths, which are used to receive and transmit radiation signals in different frequency bands, so that the antenna module can cover multiple frequency bands.

[0054] Optionally, in an embodiment of the present application, the frequency bands covered by the target radiation signal received and transmitted by the antenna module at least include the GPS L5 frequency band (1.176 GHz), the N77 frequency band (3.3 GHz–4.2 GHz), and the Wi-Fi 5G frequency band (5.15 GHz–5.85 GHz), but the present application does not limit this, and it depends on the specific situation.

[0055] Based on any of the above embodiments, in an embodiment of the present application, the length between the first end and the second end of the first radiator is a first length L1, and the first length L1 is not less than the target ratio of the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator. Optionally, the length between the first end and the second end of the first radiator is a first length L1, and the first length L1 is not less than the target ratio of the central wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator. Among them, the target ratio can be 1 / 4 or not 1 / 4, and the present application does not limit this. As long as the first radiator can be used to receive and transmit the radiation signal in the first frequency band. Hereinafter, taking the length between the first end and the second end of the first radiator as the first length not less than 1 / 4 of the central wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator as an example, the antenna module provided by the embodiments of the present application will be described.

[0056] It should be noted that the lower the frequency band of the radiation signal received and transmitted by the antenna, the longer the electrical length of the radiator required for this frequency band. The higher the frequency band of the radiation signal received and transmitted by the antenna, the shorter the electrical length of the radiator required for this frequency band. Therefore, in an embodiment of the present application, the first frequency band is the lowest frequency band among the radiation signals received and transmitted by the antenna module, so that the first radiator can receive and transmit each frequency band it needs to cover, but the present application does not limit this, and it depends on the specific situation.

[0057] Optionally, in an embodiment of the present application, the first frequency band is the GPS L5 frequency band, and its central frequency is 1.176 GHz, so that the antenna module can cover the GPS L5 frequency band, but the present application does not limit this, and it depends on the specific situation.

[0058] Based on any of the above embodiments, in an embodiment of the present application, the filter circuit includes a first filter branch and at least one second filter branch. Among them, the length (i.e., the electrical length) of the current path formed by the first filter branch and the first part of the first radiator satisfies a first target condition with the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. Optionally, the length (i.e., the electrical length) of the current path formed by the first filter branch and the first part of the first radiator satisfies a first target condition with the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator, so that the target radiation signal that the antenna module can receive and transmit can cover the second frequency band. Among them, the frequency of the second frequency band is higher than the frequency of the first frequency band. Optionally, the second frequency band can be the N77 frequency band, and its frequency range is 3.3 GHz - 4.2 GHz, but the present application does not limit this, and it depends on the specific situation.

[0059] Optionally, in an embodiment of the present application, the length of the current path formed by the first filtering branch and the first part of the first radiator satisfying the first target condition with respect to the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator may include that the length of the current path formed by the first filtering branch and the first part of the first radiator is the same as 1 / 4 of the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. Among them, the length of the current path formed by the first filtering branch and the first part of the first radiator being the same as 1 / 4 of the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator may be that the length of the current path formed by the first filtering branch and the first part of the first radiator is the same as 1 / 4 of the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator, or may be that the length of the current path formed by the first filtering branch and the first part of the first radiator is substantially the same as 1 / 4 of the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. The present application does not make a limitation on this, and it depends on the specific situation.

[0060] Optionally, in an embodiment of the present application, the part of the first radiator between the first end and the first position is the first part, and the length of the first part satisfies the first target condition with respect to the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator, that is, the physical length L2 of the first part of the first radiator is the same as 1 / 4 of the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. The impedance of the first filtering branch to the ground is zero ohm, but the present application does not make a limitation on this, and it depends on the specific situation.

[0061] Based on the above embodiment, in an optional embodiment of the present application, the physical length L2 of the first part of the first radiator being the same as 1 / 4 of the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator includes: the physical length L2 of the first part of the first radiator is the same as or substantially the same as 1 / 4 of the central wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator.

[0062] It should be noted that connecting a capacitor electrically to a radiator with a fixed physical length can make the electrical length of the branch formed by the radiator and the capacitor less than the physical length of the radiator, and connecting an inductor electrically to a radiator with a fixed physical length can make the electrical length of the branch formed by the radiator and the capacitor greater than the physical length of the radiator.

[0063] Optionally, in an embodiment of the present application, as Figure 2As shown, the first filtering branch 21 includes a first capacitor C1 and a first inductor L1 connected in series. By setting the parameters of the series connection of the first capacitor C1 and the first inductor L1 and the first inductor L1 and the first capacitor C1, the impedance of the first filtering branch 21 to the ground is made zero ohms. It should be noted that in this embodiment, the specific parameter values of the first capacitor C1 and the first inductor L1 can be determined through experiments, and this application will not elaborate on this.

[0064] Specifically, in an embodiment of the present application, the capacitance value of the first capacitor C1 can be 0.5 pF, and the inductance value of the first inductor L1 can be 3.6 nH, but this application does not limit this, and it depends on the specific situation.

[0065] As can be seen from the foregoing, the lower the frequency band of the radiation signal received and transmitted by the antenna, the longer the electrical length of the radiator required for this frequency band, and the higher the frequency band of the radiation signal received and transmitted by the antenna, the shorter the electrical length of the radiator required for this frequency band. Therefore, on the basis of the above embodiment, in an embodiment of the present application, the second frequency band f2 is the sub-low frequency band in the radiation signals received and transmitted by the antenna module, so that the length of the first radiator can cover more antenna frequency bands, but this application does not limit this, and it depends on the specific situation.

[0066] On the basis of any of the above embodiments, in an embodiment of the present application, the at least one second filtering branch includes a second filtering branch, and this second filtering branch includes a capacitive element. The length of the current path formed by the second filtering branch and the first part of the first radiator satisfies a second target condition with the wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator. The frequency of the third frequency band is higher than the frequency of the second frequency band. Optionally, in an embodiment of the present application, the third frequency can be the WiFi 5G frequency band, or the WiFi6E frequency band, or other frequency bands, and this application does not limit this, and it depends on the specific situation.

[0067] It should be noted that in the above embodiments, the length of the current path formed by the second filtering branch and the first part of the first radiator satisfies the second target condition with respect to the wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator, which includes: the length of the current path formed by the second filtering branch and the first part of the first radiator satisfies the same condition as 1 / 4 of the central wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator. Specifically, it can be that the length of the current path formed by the second filtering branch and the first part of the first radiator is the same as 1 / 4 of the central wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator, or the length of the current path formed by the second filtering branch and the first part of the first radiator is substantially the same as 1 / 4 of the central wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator. The present application does not make any limitations in this regard and depends on specific circumstances.

[0068] In another embodiment of the present application, the at least one second filtering branch includes a second filtering branch, and this second filtering branch includes a series-connected inductance element and capacitance element. The length of the current path formed by the second filtering branch and the first part of the first radiator satisfies the third target condition with respect to the wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator, and the frequency of the fourth frequency band is higher than the frequency of the second frequency band. Optionally, in an embodiment of the present application, the fourth frequency band can be the N79 frequency band or other frequency bands. The present application does not make any limitations in this regard and depends on specific circumstances.

[0069] It should be noted that in the above embodiments, the length of the current path formed by the second filtering branch and the first part of the first radiator satisfies the third target condition with respect to the wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator, which includes that the length of the current path formed by the second filtering branch and the first part of the first radiator satisfies the same condition as 1 / 4 of the central wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator. Specifically, the length of the current path formed by the second filtering branch and the first part of the first radiator satisfying the same condition as 1 / 4 of the central wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator can include: the length of the current path formed by the second filtering branch and the first part of the first radiator is the same as 1 / 4 of the central wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator, or the length of the current path formed by the second filtering branch and the first part of the first radiator is substantially the same as 1 / 4 of the central wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator. The present application does not make any limitations in this regard and depends on specific circumstances.

[0070] In yet another embodiment of the present application, the at least one second filtering branch includes N + 1 second filtering branches, so that the antenna module can cover the transceiver of radiation signals in N + 3 frequency bands.

[0071] Specifically, continuing as Figure 2 shown, the current path length formed by the first second filtering branch 221 and the first part of the first radiator satisfies the same condition as 1 / 4 of the center wavelength of the radiation signal in the third frequency band f3 transceived by the first radiator; the current path length formed by the second second filtering branch 222 and the first part of the first radiator satisfies the same condition as 1 / 4 of the center wavelength of the radiation signal in the fifth frequency band f5 transceived by the first radiator; the current path length formed by the third second filtering branch 223 and the first part of the first radiator satisfies the same condition as 1 / 4 of the center wavelength of the radiation signal in the fourth frequency band f4 transceived by the first radiator.

[0072] Optionally, in an embodiment of the present application, the third frequency band is the WiFi 5G frequency band, the fifth frequency band is the WiFi6E frequency band, and the fourth frequency band is the N79 frequency band, so that the frequency bands covered by the antenna module at least include GPS L5 (center frequency 1.176 GHz), N77 frequency band (3.3 GHz - 4.2 GHz), WiFi 5G frequency band (5.15 GHz - 5.85 GHz), WiFi6E frequency band (5.925 GHz - 7.125 GHz), and N79 frequency band (4.8 GHz to 4.96 GHz). It should be noted that in this embodiment, the filtering circuit presents a small inductance state for the N77 frequency band, a small capacitance state for the WiFi 5G frequency band, and an open circuit state for GPS L5.

[0073] Specifically, in an embodiment of the present application, continuing as Figure 2As shown, the first second filtering branch 221 includes a second capacitor C2 with a capacitance value of 0.4 pF, so that the whole formed by the first second filtering branch 221 and the first radiator can realize the transceiver of the radiation signal in the WiFi 5G band; the second second filtering branch 222 includes a third capacitor C3 with a capacitance value of 0.2 pF, so that the whole formed by the second second filtering branch 222 and the first radiator can realize the transceiver of the radiation signal in the WiFi 6E band; the third second filtering branch 223 includes a series connection of a fourth capacitor C4 and a second inductor L2, where the capacitance value of the fourth capacitor C4 is 0.5 pF and the inductance value of the second inductor L2 is 2.2 nH, so that the whole formed by the third second filtering branch 223 and the first radiator can realize the transceiver of the radiation signal in the N79 band, but this application does not make a limitation on this, and it depends on the specific situation.

[0074] In other embodiments of this application, the filtering circuit may further include more second filtering branches to achieve coverage of more frequency bands. This application does not make a limitation on this, and it depends on the specific situation. It should be noted that in this embodiment, if each filtering branch in the filtering circuit includes a series-connected capacitor and inductor, the capacitance value of the capacitor can be selected as 0.5 pf to reduce the influence of the capacitor on the antenna bandwidth by using a small capacitance value, making the bandwidth of each frequency band a little narrower and reducing the signal interference between different frequency bands. However, this application does not make a limitation on this, and it depends on the specific situation.

[0075] Based on any of the above embodiments, in an embodiment of this application, continue as Figure 1 As shown, the length between the first end 01 and the second end 05 of the first radiator 10 is a first length, and the first length is greater than the target ratio of the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator. In this embodiment, the length between the first end 01 and the third position 04 of the first radiator 10 satisfies a fourth target condition with the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator. Optionally, the length between the first end 01 and the third position 04 of the first radiator 10 satisfying the fourth target condition with the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator 10 includes: the length between the first end 01 and the third position 04 of the first radiator 10 satisfies the same condition as 1 / 4 of the center wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator 10, so that the part between the first end 01 and the third position 04 of the first radiator 10 can realize the transceiver of the radiation signal in the first frequency band.

[0076] It should be noted that in the above embodiments, the length between the first end 01 and the third position 04 of the first radiator 10 and 1 / 4 of the center wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator 10 satisfying the same condition may include that the length between the first end 01 and the third position 04 of the first radiator 10 is the same as 1 / 4 of the center wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator 10, or may include that the length between the first end 01 and the third position 04 of the first radiator 10 is substantially the same as 1 / 4 of the center wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator 10.

[0077] Based on any of the above embodiments, in an embodiment of the present application, continue as Figure 1 shown, the length between the second end 05 of the first radiator 10 and the third position 04 satisfies a first target condition with the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator 10. The frequency of the second frequency band is higher than the frequency of the first frequency band, so that the first radiator 10 can realize the reception and transmission of the radiation signal in the second frequency band through the first part of the first radiator 10 and the first filtering branch in the filtering circuit, and realize the reception and transmission of the radiation signal in the second frequency band through the part between the second end 05 and the third position 04 of the first radiator 10, so that the antenna module can realize dual resonance in the second frequency band and improve the antenna performance of the antenna module for receiving and transmitting the radiation signal in the second frequency band. However, the present application does not limit this, and it depends on the specific situation.

[0078] It should be noted that in the above embodiments, the third position of the first radiator is the grounding end of the first radiator. Thus, when realizing the reception and transmission of the radiation signal in the second frequency band by using the part between the third position and the second end of the first radiator, the grounding end can be used to isolate the radiation signal in the second frequency band received and transmitted by using the part between the third position and the second end of the first radiator, and reduce the interference of the radiation signal in the second frequency band received and transmitted by using the part between the third position and the second end of the first radiator on the radiation signal received and transmitted by using the part between the third position and the first end of the first radiator.

[0079] Based on any of the above embodiments, in an embodiment of the present application, continue as Figure 1As shown, the portion of the first radiator 10 located between the first end 01 and the second position 02 is the second portion of the first radiator 10. The length of the second portion satisfies a second target condition with respect to the wavelength of the radiation signal in the third frequency band transmitted and received by the first radiator 10, where the frequency of the third frequency band is higher than the frequency of the second frequency band, so that the first radiator can transmit and receive the radiation signal in the third frequency band through the first portion of the first radiator and the second filtering branch in the filtering circuit, and transmit and receive the radiation signal in the second frequency band through the second portion of the first radiator, thereby enabling the antenna module to achieve double resonance in the third frequency band and improving the antenna performance of the antenna module for transmitting and receiving the radiation signal in the third frequency band. However, the present application does not limit this, and it depends on the specific situation.

[0080] Based on any of the above embodiments, in an embodiment of the present application, the feeding circuit includes: a feeding branch, one end of the feeding branch is connected to the second position of the first radiator, and the other end is connected to the feeding point of the antenna module, and is used to feed the signal input by the feeding point into the first radiator. Optionally, as Figure 3 shown, the feeding branch includes: a first component branch 31, a second component branch 32, and a third component branch 33. Among them, one end of the first component branch 31 is connected to the second position of the first radiator, and the other end is connected to the first end of the second component branch 32. The second end of the second component branch 32 is connected to the feeding point Feed, and one end of the third component branch 33 is connected to the common end of the first component branch 31 and the second component branch 32, and the other end is grounded to GND.

[0081] Optionally, in an embodiment of the present application, the first component branch 51 includes a fifth capacitor C5 and a third inductor L3 connected in series. The second component branch 32 includes a sixth capacitor C6 and a fourth inductor L4 connected in series. The third component branch 33 includes a fifth inductor L5. Specifically, the capacitance value of the fifth capacitor C5 can be 68 pF, the inductance value of the third inductor L3 can be 2 nH, the capacitance value of the sixth capacitor C6 can be 0.8 pF, the inductance value of the fourth inductor L4 can be 1 nH, and the inductance value of the fifth inductor L5 can be 6.2 nH. However, the present application does not limit this, and it depends on the specific situation.

[0082] Optionally, in an embodiment of the present application, continuing as Figure 3As shown, the feeding circuit further includes: an isolation branch 34 between the second position of the first radiator and the ground terminal, and the isolation branch 34 is used to isolate the interference of the radiation signals received and transmitted by the second part on the radiation signals received and transmitted by the first part. Optionally, in an embodiment of the present application, the impedance of the isolation branch is 50 ohms, but the present application does not limit this, and it depends on the specific situation. Specifically, in an embodiment of the present application, continue as Figure 3 As shown, the isolation branch 34 may include a seventh capacitor C7 and a sixth inductor L6 connected in series. Among them, the capacitance value of the seventh capacitor C7 may be 0.7 pF, and the inductance value of the sixth inductor L6 may be 4.3 nH, but the present application does not limit this, and it depends on the specific situation.

[0083] Based on any of the above embodiments, in an embodiment of the present application, continue as Figure 1 As shown, the antenna module may further include: a second radiator 40, and the feeding circuit 30 also receives and transmits target radiation signals through the second radiator 40. The radiation signals received and transmitted by the second radiator 40 are different from the radiation signals received and transmitted by the first radiator 10 to increase the antenna frequency band bandwidth that the antenna module can cover. However, the present application does not limit this. In other embodiments of the present application, the radiation signals received and transmitted by the second radiator 40 may also be the same as the radiation signals received and transmitted by the first radiator 10 to enhance the performance of at least some antenna frequency bands in the existing receiving and transmitting frequency bands of the antenna module. Optionally, the feeding circuit 30 realizes signal connection with the second radiator 40 through position A3.

[0084] Optionally, in an embodiment of the present application, there is an insulating gap between the second radiator and the first end of the first radiator to use the insulating gap to reduce the coupling between the radiation signals received and transmitted by the first radiator and the radiation signals received and transmitted by the second radiator, thereby reducing the interference between the radiation signals received and transmitted by the first radiator and the radiation signals received and transmitted by the second radiator.

[0085] Based on any of the above embodiments, in an embodiment of the present application, continue as Figure 1As shown, the antenna module may further include: a third radiator 50. The feeding circuit 30 also transmits and receives target radiation signals through the third radiator 50. The radiation signals transmitted and received by the third radiator 50 are different from the radiation signals transmitted and received by the first radiator 10, so as to increase the antenna frequency band bandwidth that the antenna module can cover. However, the present application does not limit this. In other embodiments of the present application, the radiation signals transmitted and received by the third radiator 50 may also be the same as the radiation signals transmitted and received by the first radiator 10, so as to enhance the performance of at least some antenna frequency bands in the existing transmission and reception frequency bands of the antenna module. Optionally, the feeding circuit 30 is signal-connected to the third radiator 50 through position A1.

[0086] Optionally, in an embodiment of the present application, there is an insulating gap between the third radiator and the first end of the first radiator, so as to use the insulating gap to reduce the coupling between the radiation signals transmitted and received by the first radiator and the radiation signals transmitted and received by the third radiator, thereby reducing the interference between the radiation signals transmitted and received by the first radiator and the radiation signals transmitted and received by the third radiator.

[0087] As Figure 4 shown, Figure 4 shows the radiation efficiency schematic diagram and reflection coefficient schematic diagram of the antenna module provided by the embodiment of the present application. Among them, the blue curve represents the radiation efficiency schematic diagram of the antenna signals transmitted and received by the antenna module, and the green curve represents the reflection coefficient schematic diagram of the antenna signals transmitted and received by the antenna module. From Figure 4 the blue curve in it, it can be seen that the antenna module provided by the embodiment of the present application can have multiple resonance points at 1.176 GHz, 3.3 GHz, 4.2 GHz, 5.15 GHz, and 5.85 GHz, that is, the antenna module provided by this embodiment can cover multiple frequency bands such as GPS L5 (1.176 GHz), N77 (3.3 - 4.2 GHz), and Wi-Fi 5G (5.15 - 5.85 GHz). Moreover, from Figure 4 the green curve in it, it can be seen that the antenna module provided by the embodiment of the present application has an echo loss of more than -10 dB at multiple resonance points of 1.176 GHz, 3.3 GHz, 4.2 GHz, 5.15 GHz, and 5.85 GHz, and the antenna performance is good.

[0088] As can be seen from the above, for the antenna module provided by the embodiment of the present application, different filter branches in the filter circuit and at least part of the first radiator form current paths with different electrical lengths to realize the transmission and reception of radiation signals in different frequency bands, so as to achieve multi-band coverage. Moreover, in the embodiment of the present application, the filter circuit is implemented by at least one of a capacitor and an inductor, so that the filter circuit only includes a capacitor and / or an inductor, and the required occupied space is small, and it is less restricted by the space in the electronic device to which the antenna module is applied.

[0089] In addition, an embodiment of the present application further provides an electronic device, which may be a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a laptop computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), etc. The embodiments of the present application do not impose any restrictions on this.

[0090] Specifically, in the embodiment of the present application, the electronic device includes an antenna module, and the antenna module includes:

[0091] A first radiator, the first radiator having a first end and a second end along its extending direction;

[0092] A filtering circuit connected to a first position of the first radiator, the first position being between the first end and the second end, and the filtering circuit including M parallel filtering branches, M≥2;

[0093] A feeding circuit, the feeding circuit being connected to a second position of the first radiator and transmitting and receiving a target radiation signal at least through the first radiator.

[0094] Among them, different filtering branches and a first part of the first radiator form current paths with different electrical lengths for realizing the transmission and reception of radiation signals in different frequency bands.

[0095] It should be noted that in this embodiment, the antenna module may be the antenna module provided in any of the above embodiments.

[0096] Optionally, in an embodiment of the present application, the filtering circuit is implemented by at least one of a capacitor and an inductor, so that the filtering circuit only includes a capacitor and / or an inductor, the required occupied space is small, which is beneficial to the miniaturization of the antenna module, and the space limitation in the electronic device to which the antenna module is applied is small.

[0097] It should be noted that in this embodiment, the part of the first radiator between the first end and the first position is the first part of the first radiator. Different filtering branches and the first part of the first radiator form current paths with different electrical lengths for realizing the transmission and reception of radiation signals in different frequency bands, so that the antenna module can cover multiple frequency bands.

[0098] Optionally, in an embodiment of the present application, the frequency band covered by the target radiation signal transmitted and received by the antenna module includes at least the GPS L5 band (1.176 GHz), the N77 band (3.3 GHz - 4.2 GHz), and the Wi-Fi 5G band (5.15 GHz - 5.85 GHz). However, the present application does not limit this, and it depends on the specific situation.

[0099] Based on any of the above embodiments, in an embodiment of the present application, the length between the first end and the second end of the first radiator is the first length L1, and the first length L1 is not less than the target ratio of the wavelength of the radiation signal in the first frequency band transmitted and received by the first radiator. Optionally, the length between the first end and the second end of the first radiator is the first length L1, and the first length L1 is not less than the target ratio of the center wavelength of the radiation signal in the first frequency band transmitted and received by the first radiator. Among them, the target ratio can be 1 / 4 or not 1 / 4. The present application does not limit this, as long as the first radiator can be used to transmit and receive the radiation signal in the first frequency band.

[0100] It should be noted that the lower the frequency band of the radiation signal transmitted and received by the antenna, the longer the electrical length of the radiator required for this frequency band. The higher the frequency band of the radiation signal transmitted and received by the antenna, the shorter the electrical length of the radiator required for this frequency band. Therefore, in an embodiment of the present application, the first frequency band is the lowest frequency band among the radiation signals transmitted and received by the antenna module, so that the first radiator can transmit and receive each frequency band it needs to cover. However, the present application does not limit this, and it depends on the specific situation.

[0101] Optionally, in an embodiment of the present application, the first frequency band is the GPS L5 band, and its center frequency is 1.176 GHz, so that the antenna module can cover the GPS L5 band. However, the present application does not limit this, and it depends on the specific situation.

[0102] Based on any of the above embodiments, in an embodiment of the present application, the filtering circuit includes a first filtering branch and at least one second filtering branch. Among them, the length (i.e., electrical length) of the current path formed by the first filtering branch and the first part of the first radiator satisfies a first target condition with respect to the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. Optionally, the length (i.e., electrical length) of the current path formed by the first filtering branch and the first part of the first radiator satisfies a first target condition with respect to the center wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator, so that the target radiation signal that the antenna module can receive and transmit can cover the second frequency band, where the frequency of the second frequency band is higher than the frequency of the first frequency band. Optionally, the second frequency band may be the N77 frequency band, and its frequency range is 3.3 GHz - 4.2 GHz. The length of the current path formed by the first filtering branch and the first part of the first radiator is 1 / 4 wavelength of 3.6 GHz, but the present application does not limit this, and it depends on the specific situation. The difference is that radiation signals of different frequencies have different wavelengths, and their relationship satisfies C 0 where C is the speed of light, f is the frequency, and λ is the wavelength.

[0103] Optionally, in an embodiment of the present application, the part of the first radiator between the first end and the first position is the first part, and the length of the first part satisfies a first target condition with respect to the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator, that is, the physical length L2 of the first part of the first radiator satisfies the same condition as 1 / 4 of the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. The impedance of the first filtering branch to the ground is zero ohms, but the present application does not limit this, and it depends on the specific situation.

[0104] It should be noted that connecting a capacitor electrically to a radiator with a fixed physical length can make the electrical length of the branch formed by the radiator and the capacitor less than the physical length of the radiator. Connecting an inductor electrically to a radiator with a fixed physical length can make the electrical length of the branch formed by the radiator and the capacitor greater than the physical length of the radiator.

[0105] Optionally, in an embodiment of the present application, the first filtering branch includes a first capacitor and a first inductor connected in series, so as to achieve an impedance of zero ohms for the first filtering branch to the ground through the series connection of the first capacitor and the first inductor and the parameter settings of the first inductor and the first capacitor. It should be noted that in this embodiment, the specific parameter values of the first capacitor and the first inductor can be determined through experiments, and the present application will not elaborate on this.

[0106] Based on the above embodiments, in an embodiment of the present application, the second frequency band is the sub-low frequency band in the radiation signals received and transmitted by the antenna module, so that the length of the first radiator can cover more antenna frequency bands. However, the present application does not limit this, and it depends on the specific situation.

[0107] Based on any of the above embodiments, in an embodiment of the present application, the at least one second filtering branch includes a second filtering branch, and this second filtering branch includes a capacitive element. The length of the current path formed by the second filtering branch and the first part of the first radiator satisfies a second target condition with respect to the wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator. The frequency of the third frequency band is higher than the frequency of the second frequency band. Optionally, in an embodiment of the present application, the third frequency may be the WiFi 5G frequency band, or the WiFi6E frequency band, or other frequency bands. The present application does not limit this, and it depends on the specific situation.

[0108] In another embodiment of the present application, the at least one second filtering branch includes a second filtering branch, and this second filtering branch includes a series-connected inductive element and a capacitive element. The length of the current path formed by the second filtering branch and the first part of the first radiator satisfies a third target condition with respect to the wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator. The frequency of the fourth frequency band is higher than the frequency of the second frequency band. Optionally, in an embodiment of the present application, the fourth frequency band may be the N79 frequency band, or other frequency bands. The present application does not limit this, and it depends on the specific situation.

[0109] Based on any of the above embodiments, in an embodiment of the present application, the length between the first end and the second end of the first radiator is a first length, and the first length is greater than the target ratio of the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator. In this embodiment, the length between the first end and the third position of the first radiator satisfies a fourth target condition with respect to the wavelength of the radiation signal in the first frequency band received and transmitted by the first radiator, so that the part between the first end and the third position of the first radiator can realize the reception and transmission of the radiation signal in the first frequency band.

[0110] Based on any of the above embodiments, in an embodiment of the present application, the length between the second end of the first radiator and the third position satisfies a first target condition with the wavelength of the radiation signal in the second frequency band received and transmitted by the first radiator. The frequency of the second frequency band is higher than the frequency of the first frequency band, so that the first radiator can realize the reception and transmission of the radiation signal in the second frequency band through the first part of the first radiator and the first filtering branch in the filtering circuit, and through the part between the second end and the third position of the first radiator, so that the antenna module can realize double resonance in the second frequency band and improve the antenna performance of the antenna module for receiving and transmitting the radiation signal in the second frequency band. However, the present application does not limit this, and it depends on the specific situation.

[0111] It should be noted that, in the above embodiment, the third position of the first radiator is the grounding end of the first radiator. Thus, when realizing the reception and transmission of the radiation signal in the second frequency band by using the part between the third position and the second end of the first radiator, the grounding end can be used to isolate the radiation signal in the second frequency band received and transmitted by using the part between the third position and the second end of the first radiator, and reduce the interference of the radiation signal in the second frequency band received and transmitted by using the part between the third position and the second end of the first radiator on the radiation signal received and transmitted by using the part between the third position and the first end of the first radiator.

[0112] Based on any of the above embodiments, in an embodiment of the present application, the part of the first radiator between the first end and the second position is the second part of the first radiator. The length of the second part satisfies a second target condition with the wavelength of the radiation signal in the third frequency band received and transmitted by the first radiator. Among them, the frequency of the third frequency band is higher than the frequency of the second frequency band, so that the first radiator can realize the reception and transmission of the radiation signal in the third frequency band through the first part of the first radiator and the second filtering branch in the filtering circuit, and through the second part of the first radiator, so that the antenna module can realize double resonance in the third frequency band and improve the antenna performance of the antenna module for receiving and transmitting the radiation signal in the third frequency band. However, the present application does not limit this, and it depends on the specific situation.

[0113] Optionally, in an embodiment of the present application, the third frequency band is 5.15 - 5.85 GHz, and the length of the second part is 1 / 4 of the wavelength corresponding to 5.5 GHz in the WIFI 5G frequency band. However, the present application does not limit this, and it depends on the specific situation.

[0114] Based on any of the above embodiments, in an embodiment of the present application, the feeding circuit includes: a feeding branch, one end of the feeding branch is connected to the second position of the first radiator, and the other end is connected to the feeding point of the antenna module, and is used to feed the signal input from the feeding point into the first radiator.

[0115] Optionally, in an embodiment of the present application, the feeding circuit includes: an isolation branch between the second position of the first radiator and the grounding end, and the isolation branch is used to isolate the interference of the radiation signal received and transmitted by the second part on the radiation signal received and transmitted by the first part.

[0116] Based on any of the above embodiments, in an embodiment of the present application, the antenna module may further include: a second radiator, and the feeding circuit also receives and transmits a target radiation signal through the second radiator. The radiation signal received and transmitted by the second radiator is different from the radiation signal received and transmitted by the first radiator, so as to increase the antenna frequency band bandwidth that the antenna module can cover. However, the present application does not limit this. In other embodiments of the present application, the radiation signal received and transmitted by the second radiator may also be the same as the radiation signal received and transmitted by the first radiator, so as to enhance the performance of at least part of the antenna frequency bands in the existing receiving and transmitting frequency bands of the antenna module. Optionally, the feeding circuit realizes signal connection with the second radiator through a position.

[0117] Optionally, in an embodiment of the present application, there is an insulating gap between the second radiator and the first end of the first radiator, so as to use the insulating gap to reduce the coupling between the radiation signal received and transmitted by the first radiator and the radiation signal received and transmitted by the second radiator, thereby reducing the interference between the radiation signal received and transmitted by the first radiator and the radiation signal received and transmitted by the second radiator.

[0118] Based on any of the above embodiments, in an embodiment of the present application, the antenna module may further include: a third radiator, and the feeding circuit also receives and transmits a target radiation signal through the third radiator. The radiation signal received and transmitted by the third radiator is different from the radiation signal received and transmitted by the first radiator, so as to increase the antenna frequency band bandwidth that the antenna module can cover. However, the present application does not limit this. In other embodiments of the present application, the radiation signal received and transmitted by the third radiator may also be the same as the radiation signal received and transmitted by the first radiator, so as to enhance the performance of at least part of the antenna frequency bands in the existing receiving and transmitting frequency bands of the antenna module. Optionally, the feeding circuit realizes signal connection with the third radiator through a position.

[0119] Optionally, in an embodiment of the present application, there is an insulating gap between the third radiator and the first end of the first radiator, so as to utilize the insulating gap to reduce the coupling between the radiation signals received and transmitted by the first radiator and the radiation signals received and transmitted by the third radiator, thereby reducing the interference between the radiation signals received and transmitted by the first radiator and the radiation signals received and transmitted by the third radiator.

[0120] Based on any of the above embodiments, in an embodiment of the present application, the first radiator, the second radiator, and / or the third radiator may be a radiator independently disposed inside the electronic device, or may be a component of the housing of the electronic device. The present application does not make any limitations in this regard and depends on the specific situation.

[0121] It should be noted that, in this embodiment, if the first radiator is a component of the housing of the electronic device, the electronic device can solve the influence of other electronic components in the electronic device on the frequency of the radiation signal received and transmitted by the first radiator by adjusting the impedance matching of the feeding circuit, and can also solve the influence of other electronic components in the electronic device on the frequency of the radiation signal received and transmitted by the first radiator by providing a slit (i.e., an insulating gap) between the first radiator and a part of the metal housing where electronic components are disposed nearby, so as to solve the problem that the position of the antenna module in the electronic device close to other electronic components (including the display, the battery, and the metal shell) in the electronic device may cause the antenna to be detuned.

[0122] In summary, for the antenna module and the electronic device provided by the embodiments of the present application, the antenna module can cover multiple frequency bands such as GPS L5 (1.176 GHz), N77 (3.3 GHz - 4.2 GHz), Wi-Fi 5G (5.15 GHz - 5.85 GHz), etc., occupies a relatively small space, is less restricted by idle space when applied to electronic devices with limited space, and has less interference between radiation signals of different frequency bands, and has good antenna performance.

[0123] In this specification, the various embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. For the same or similar parts between the various embodiments, reference can be made to each other.

[0124] It should be noted that in the description of this application, it should be understood that the descriptions of the drawings and embodiments are illustrative rather than restrictive. It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the above elements.

[0125] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. An antenna module, comprising: A first radiator, wherein the first radiator has a first end and a second end along an extension direction thereof; a filter circuit connected to a first position of the first radiator, the first position being located between the first end and the second end, the filter circuit comprising M parallel filter branches, M≥2; a feeding circuit, the feeding circuit being connected to the second position of the first radiator and at least transmitting and receiving a target radiation signal through the first radiator; Among them, different filter branches and the first part of the first radiator form current paths with different electrical lengths, which are used to realize the transmission and reception of radiation signals in different frequency bands.

2. The antenna module according to claim 1, wherein the length between the first end and the second end of the first radiator is a first length, and the first length is not less than a target ratio of wavelengths of radiation signals of a first frequency band transmitted and received by the first radiator; The first frequency band is the lowest frequency band of the radiation signal received and sent by the antenna module.

3. The antenna module according to claim 2, wherein the filter circuit comprises a first filter branch and at least one second filter branch, and the length of the current path formed by the first filter branch and the first part of the first radiator and the wavelength of the radiation signal of the second frequency band received and transmitted by the first radiator meet the first target condition; The frequency of the second frequency band is higher than the frequency of the first frequency band.

4. The antenna module according to claim 3, wherein a portion of the first radiator between the first end and the first position is the first portion, and a length of the first portion and a wavelength of a radiation signal of the second frequency band received and transmitted by the first radiator meet a first target condition; The second frequency band is the second lowest frequency band of the radiation signal received and sent by the antenna module.

5. The antenna module according to claim 3, wherein the second filter branch comprises a capacitive element, the length of the current path formed by the second filter branch and the first part of the first radiator and the wavelength of the radiation signal of the third frequency band received and transmitted by the first radiator meet the second target condition, and the frequency of the third frequency band is higher than the frequency of the second frequency band; and / or, The second filter branch includes an inductor element and a capacitor element connected in series. The length of the current path formed by the second filter branch and the first part of the first radiator and the wavelength of the radiation signal in the fourth frequency band received and transmitted by the first radiator meet the third target condition. The frequency of the fourth frequency band is higher than the frequency of the second frequency band.

6. The antenna module according to claim 3, wherein the length between the first end and the second end of the first radiator is a first length, and the first length is greater than a target ratio of wavelengths of radiation signals of a first frequency band transmitted and received by the first radiator; The length between the first end and the third position of the first radiator and the wavelength of the radiation signal of the first frequency band received and transmitted by the first radiator meet the fourth target condition; The length between the second end of the first radiator and the third position and the wavelength of the radiation signal of the second frequency band received and transmitted by the first radiator meet the first target condition, and the frequency of the second frequency band is higher than the frequency of the first frequency band.

7. The antenna module according to claim 5, wherein the portion of the first radiator between the first end and the second position is the second portion of the radiator, and the length of the second portion and the wavelength of the radiation signal of the third frequency band received and transmitted by the first radiator meet the second target condition; in, The frequency of the third frequency band is higher than the frequency of the second frequency band.

8. The antenna module according to claim 7, wherein the feeding circuit comprises: An isolation branch between the second position of the first radiator and the ground end, the isolation branch is used to isolate the interference of the radiation signal received and sent by the second part on the radiation signal received and sent by the first part.

9. The antenna module according to any one of claims 1 to 8, further comprising: a second radiator, wherein an insulating gap is provided between the second radiator and the first end of the first radiator, the feeding circuit further transmits and receives a target radiation signal through the second radiator, and the radiation signal transmitted and received by the second radiator is different from the radiation signal transmitted and received by the first radiator; and / or, A third radiator, an insulating gap is provided between the second end of the second radiator and the first radiator, the feeding circuit also transmits and receives a target radiation signal through the third radiator, and the radiation signal received and transmitted by the third radiator is different from the radiation signal received and transmitted by the first radiator.

10. An electronic device, comprising an antenna module, wherein the antenna module comprises: A first radiator, wherein the first radiator has a first end and a second end along an extension direction thereof; a filter circuit connected to a first position of the first radiator, the first position being located between the first end and the second end, the filter circuit comprising M parallel filter branches, M≥2; a feeding circuit, the feeding circuit being connected to the second position of the first radiator and at least transmitting and receiving a target radiation signal through the first radiator; Among them, different filter branches and the first part of the first radiator form current paths with different electrical lengths, which are used to realize the transmission and reception of radiation signals in different frequency bands.

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