Antenna assembly and electronic device

Abstract

The present application relates to the technical field of communications. Specifically provided are an antenna assembly and an electronic device, which aim to solve the problems whereby existing antenna addition is insufficiently convenient and the overall antenna layout is insufficiently simplified. To this end, the antenna assembly of the present application comprises: a first feed source, a new feed source and a first radiator, wherein the new feed source is used for providing a UWB signal; and the first feed source and the new feed source are electrically connected to the first radiator by means of a first feed point, so that, on the basis that existing antenna layouts are not changed, convenient antenna addition can be realized and the simplification of the overall antenna layout can be facilitated by means of the new feed source and the first feed source sharing a stub.

Description

Antenna assembly and electronic equipment

[0001] This application claims priority to Chinese patent application No. 202410178047.0, filed on February 8, 2024, entitled “An antenna assembly and electronic device.” The entire contents of the above-mentioned Chinese patent application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communication technology, and specifically provides an antenna assembly and an electronic device. Background Art

[0003] With the advancement of communication technology, electronic devices such as smartphones are becoming increasingly capable of performing more and more functions, and their communication modes are becoming more diverse. Recently, electronic devices have gradually become capable of ultra-wideband (UWB) communication. As you can imagine, UWB communication can be used to measure the distance to objects. UWB technology, with its centimeter-level positioning accuracy, when combined with mobile phones, can enable functions such as indoor car locating or car key locating. Currently, mobile phones typically have metal frames, and their antennas are primarily implemented within these metal frames. However, existing mobile phone antennas can number up to a dozen. Implementing UWB functionality within this metal frame requires either adding a separate slot for the UWB antenna within the already crowded metal frame or allocating separate branches within the existing structure for the UWB antenna. Adding a separate slot for the UWB antenna is difficult due to aesthetic considerations and space constraints within the existing structure. Furthermore, allocating separate branches for the UWB antenna within the existing structure will inevitably impact the existing antenna layout, requiring a complete redesign. This also increases the complexity of the RF architecture and PCB (Printed Circuit Board) layout and routing.

[0004] To address this, conventional technologies typically use processes such as FPC (Flexible Printed Circuit), LDS (Laser Direct Structuring), or LCP (Liquid Crystal Polymer) to build UWB antennas on the back of mobile phones. However, this method requires additional manufacturing steps and materials, is inconvenient, and hinders cost savings and the simplification of the overall antenna layout. Summary of the Invention

[0005] The present application aims to solve the above technical problems, namely, to solve the problem that the existing antenna addition is not convenient enough and the overall antenna layout is not simple enough.

[0006] In a first aspect, the present application provides an antenna assembly comprising: a first feed source, an additional feed source, and a first radiator;

[0007] The first feed and the newly added feed are electrically connected to the first radiator through a first feeding point, the first feed is used to provide a first radio frequency signal, the newly added feed is used to provide a newly added radio frequency signal, and the first frequency band corresponding to the first radio frequency signal and the newly added frequency band corresponding to the newly added radio frequency signal are independent of each other, and the newly added feed is used to provide a UWB signal;

[0008] The first radiator includes a first grounding end and a first free end, and the first grounding end is used for grounding.

[0009] In some embodiments, the antenna assembly further includes a first matching circuit, which is disposed between the first feed source and the first feed point and is configured to tune the first RF signal and at least block the newly added RF signal.

[0010] In some embodiments, the first matching circuit includes a first matching sub-circuit and a second matching sub-circuit;

[0011] The first matching subcircuit includes a first capacitor, a second capacitor, and a first inductor. The first capacitor and the first inductor are arranged in parallel. After the first capacitor and the first inductor are arranged in parallel, one end is connected to the first feeding point, and the other end is connected in series with the second capacitor and grounded through the second capacitor.

[0012] The second matching subcircuit includes a second inductor, which is arranged on the connecting line between the first feeding point and the first feed source, one end of the second inductor is connected to one end of the first capacitor and the first inductor arranged in parallel, and the other end of the second inductor is connected to the first feed source.

[0013] In some embodiments, the antenna assembly further includes a second feed and a second radiator;

[0014] The second feed source is electrically connected to the second radiator through a second feeding point, and the second feed source is used to provide a second radio frequency signal, and the second radio frequency signal includes a plurality of sub-band signals;

[0015] The second radiator includes a second grounding end and a second free end. The second grounding end is used for grounding. A gap is provided between the second free end and the first free end.

[0016] In some embodiments, a plurality of the second feed sources are provided, and the plurality of second feed sources are electrically connected to the second radiator through different second feeding points, respectively, and the plurality of second feed sources are used to provide different types of second RF signals.

[0017] In some embodiments, the antenna assembly further includes a second matching circuit, which is disposed between the second feed source and the second feed point and is configured to filter at least the newly added radio frequency signal.

[0018] In some embodiments, when the second feed source is used to provide an MHB signal, the second matching circuit includes a fourth capacitor, a fifth capacitor, a fourth inductor, and a fifth inductor, one end of the fifth inductor is connected to the second feed point, the other end of the fifth inductor is grounded, one end of the fifth capacitor is connected to the second feed source, the other end of the fifth capacitor is grounded, and the fourth capacitor and the fourth inductor are arranged in series on a connecting line between the fifth inductor and the fifth capacitor;

[0019] When the second feed source is used to provide the N78 or N79 signal, the second matching circuit includes a sixth capacitor, a seventh capacitor, a sixth inductor, a seventh inductor and an eighth inductor, one end of the sixth inductor is connected to the second feed point, and the other end of the sixth inductor is grounded; one end of the seventh capacitor is connected to the second feed source, and the other end of the seventh capacitor is grounded; the sixth capacitor and the seventh inductor are connected in parallel and then connected in series with the eighth inductor on the connecting line between the sixth inductor and the seventh capacitor.

[0020] In some embodiments, the antenna assembly further includes a first RF switching circuit, one end of which is arranged on a connecting line between the second feed source and the second feed point, and the other end of the RF switching circuit is grounded, for switching a switching channel so that the second radiator operates at different sub-band signals.

[0021] In some embodiments, the antenna assembly further includes a second RF switching circuit, one end of which is connected to the first matching circuit, and the other end of which is grounded, for switching the switching channel so that the first radiator operates at different sub-band signals.

[0022] In some embodiments, the first matching circuit includes a third matching sub-circuit and a fourth matching sub-circuit;

[0023] The third matching sub-circuit includes an eighth capacitor and a ninth inductor connected in parallel, wherein one end of the eighth capacitor and the ninth inductor connected in parallel is connected to the first feeding point, and the other end is connected to one end of the second RF switch circuit;

[0024] The fourth matching sub-circuit includes a tenth inductor, a ninth capacitor and a tenth capacitor arranged in series on a connecting line between one end of the eighth capacitor and the ninth inductor arranged in parallel and the first feed source, an eleventh capacitor with one end arranged on a connecting line between the ninth capacitor and the tenth capacitor and the other end grounded, and a twelfth capacitor with one end connected to the first feed source and the other end grounded.

[0025] In some embodiments, the antenna assembly further includes a newly added matching circuit, which is disposed between the newly added feed source and the first feeding point, and is configured to filter the newly added RF signal and at least block the first RF signal.

[0026] In some embodiments, the newly added matching circuit includes a third capacitor and a third inductor, one end of the third capacitor is connected to the first feeding point, the other end of the third capacitor is connected to the newly added feed source, one end of the third inductor is connected to the connecting line between the third capacitor and the newly added feed source, and the other end of the third inductor is grounded.

[0027] In some embodiments, the first feed source is used to provide a GPS L5 signal; and the newly added feed source is used to provide a UWB signal.

[0028] In a second aspect, the present application provides an electronic device comprising the antenna assembly described in any one of the above items.

[0029] By adopting the above-mentioned technical solution, the present application can provide an antenna assembly, which includes a first feed source, a newly added feed source and a first radiator, and the newly added feed source is used to provide a UWB signal; wherein, the first feed source and the newly added feed source are electrically connected to the first radiator through a first feeding point, so that on the basis of not changing the existing antenna layout, the newly added feed source and the first feed source can be connected to each other to conveniently add an antenna and help simplify the overall antenna layout.

[0030] On the other hand, the present application also provides an antenna assembly, which replaces the RF switching circuit arranged on the branch corresponding to the second feed source with one arranged on the branch corresponding to the first feed source, and uses the branch corresponding to the first feed source as the parasitic branch of the second feed source. By utilizing the second RF switching circuit arranged on the branch corresponding to the first feed source, switching of multiple sub-band signals corresponding to the second feed source is achieved, and continuous coverage of multiple sub-bands is achieved by combining the parasitic branch with the branch corresponding to the second feed source. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The preferred embodiments of the present application are described below with reference to the accompanying drawings, in which:

[0032] FIG1 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application;

[0033] FIG2 is a schematic structural diagram of an antenna assembly provided with a matching circuit according to an embodiment of the present application;

[0034] FIG3 is a schematic diagram of a partial structure of an antenna assembly provided with a matching circuit according to a specific example of the present application;

[0035] FIG4 is a schematic structural diagram of an antenna assembly provided with a second feed source according to an embodiment of the present application;

[0036] FIG5 is a schematic diagram of a partial structure of an antenna assembly provided with a second feed source according to a specific example of the present application;

[0037] FIG6 exemplarily shows a schematic structural diagram of an antenna assembly provided with two second feed sources;

[0038] FIG7 is a schematic diagram of a partial structure of an antenna assembly provided with the second feed source on the right side of FIG6 , provided in a specific example of the present application;

[0039] Figure 8a is an S-parameter graph corresponding to the four signal types provided in this application; Figures 8b and 8c are respectively an S-parameter graph and an efficiency graph corresponding to the MHB signal; Figures 8d and 8e are respectively an S-parameter graph and an efficiency graph corresponding to the N78 or N79 signal; Figures 8f and 8g are respectively an S-parameter graph and an efficiency graph corresponding to the GPS L5 signal; Figures 8h and 8i are respectively an S-parameter graph and an efficiency graph corresponding to the UWB signal;

[0040] FIG9 is a schematic diagram of the structure of an antenna assembly provided in another embodiment of the present application

[0041] FIG10 is a schematic diagram of a partial structure of an antenna assembly provided with a second matching circuit according to another embodiment of the present application;

[0042] FIG11 is a schematic diagram of a partial structure of an antenna assembly provided with a second RF switching circuit according to a specific example of the present application;

[0043] Figures 12a and 12b are S-parameter curves and efficiency diagrams corresponding to the MHB signal after the second RF switch circuit is set; Figures 12c and 12d are S-parameter curves and efficiency diagrams corresponding to the N78 and N79 signals, respectively; Figures 12e and 12f are S-parameter curves and efficiency diagrams corresponding to the GPS L5 signal, respectively; Figures 12g and 12h are S-parameter curves and efficiency diagrams corresponding to the UWB signal, respectively;

[0044] FIG13 is a comparison diagram of B3 efficiency obtained based on the antenna assembly solution of FIG11 and the solution of FIG4 of the present application;

[0045] FIG14 is a schematic diagram of a mobile phone antenna structure provided in this application. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments disclosed in this application, not all of the embodiments. Based on the described embodiments disclosed in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meanings understood by people with ordinary skills in the field to which this application belongs. The terms "first", "second" and similar terms used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0048] Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of an antenna assembly provided in an embodiment of the present application, which may include:

[0049] A first feed source 11, a newly added feed source 12, and a first radiator 13;

[0050] The first feed 11 and the newly added feed 12 are electrically connected to the first radiator 13 through the first feeding point A. The first feed 11 is used to provide a first RF signal, and the newly added feed 12 is used to provide a newly added RF signal. The first frequency band corresponding to the first RF signal and the newly added frequency band corresponding to the newly added RF signal are independent of each other. The newly added feed 12 is used to provide a UWB signal.

[0051] The first radiator 13 includes a first grounding end and a first free end, and the first grounding end is used for grounding.

[0052] In the embodiment of the present application, the first feed source 11 and the newly added feed source 12 are used to provide different types of radio frequency signals.

[0053] As an example, radio frequency signals may include 3G (3rd-Generation, third-generation mobile communication technology) signals, 4G (4th-Generation, fourth-generation mobile communication technology) signals, 5G (5th-Generation, fifth-generation mobile communication technology), GPS (Global Positioning System) signals, and UWB signals. 5G signals include frequency bands such as N78 and N79. The N78 frequency band ranges from 3.3 to 3.8 GHz, where GHz stands for gigahertz, and the N79 frequency band ranges from 4.8 to 4.9 GHz. The MHB (Middle and High Band, referring to the mid-frequency band and high-frequency band of cellular mobile communications) frequency band ranges from 1710 MHz to 2690 MHz. The frequency bands corresponding to 3G signals, 4G signals, and 5G signals all overlap with the frequency bands corresponding to MHB. The GPS signal includes the L5 frequency band, which can be expressed as a GPS L5 signal. The center frequency of the GPS L5 frequency band is 1176.45 MHz, and the frequency band range of UWB is 3.1 GHz to 10.6 GHz.

[0054] In some embodiments, to prevent the newly added RF signal from interfering with the existing RF signal, a signal that is independent of the newly added RF signal, i.e., does not overlap with the signal and has a frequency much lower than the signal, can be used as the first RF signal. Accordingly, the newly added feed 12 is co-branched with the first feed 11 providing the first RF signal. The antenna branches are radiators of the antenna signal, and the co-branched arrangement means that both are electrically connected to the first radiator 13 through the first feed point A. For example, when the newly added feed 12 is used to provide a UWB signal, the first feed 11 can be a feed for providing a GPS signal.

[0055] The first radiator 13 may be an antenna radiator made of a conductive material and may radiate the radio frequency signal provided by the first feed source 11 or the newly added feed source 12 into space through its free end.

[0056] The above is an antenna assembly provided in an embodiment of the present application, which includes a first feed source 11, a newly added feed source 12 and a first radiator 13, and the newly added feed source 12 is used to provide a UWB signal; wherein, the first feed source 11 and the newly added feed source 12 are electrically connected to the first radiator 13 through a first feeding point A, so that on the basis of not changing the existing antenna layout, the newly added feed source 12 and the first feed source 11 can be connected to each other to conveniently add an antenna and help simplify the overall antenna layout.

[0057] In some embodiments, in order to avoid mutual interference between signals and improve signal quality, a matching circuit may be further provided based on the embodiment corresponding to FIG. 1 .

[0058] Referring to Figure 2, which is a schematic diagram of the structure of an antenna assembly provided with a matching circuit according to an embodiment of the present application, the antenna assembly may further include a first matching circuit M1, which is disposed between the first feed source 11 and the first feed point A and is configured to tune the first RF signal and to block at least the newly added RF signal.

[0059] In some embodiments, as shown in FIG2 , the antenna assembly may further include a new matching circuit M0 , which is disposed between the new feed source 12 and the first feed point A, and is used to filter the new RF signal and at least block the first RF signal.

[0060] In some embodiments, the first matching circuit M1 may include a first matching sub-circuit M 11 and the second matching sub-circuit M 12 , the first matching sub-circuit M 11 One end of the first matching sub-circuit M is set between the first feeding point A and the first feed source 11. 11 The other end of the second matching sub-circuit M is grounded and is used to tune the first RF signal and filter at least the newly added RF signal; 12 One end of the first matching sub-circuit M 11 One end of the second matching sub-circuit M 12 The other end is connected to the first feed source 11, and is used to at least stop the newly added radio frequency signal.

[0061] In some embodiments, the first matching circuit M1 and / or the newly added matching circuit M0 can be configured by using one or a combination of capacitors, inductors, antenna switches, and adjustable capacitors.

[0062] In some embodiments, referring to FIG3 , FIG3 is a schematic diagram of a partial structure of an antenna assembly provided with a matching circuit according to a specific example of the present application. The first feed source 11 may be a feed source for providing a GPS L5 signal, and the newly added feed source 12 may be a feed source for providing a UWB signal. The first matching sub-circuit M 11 The first matching sub-circuit M may include a first capacitor C1, a second capacitor C2, and a first inductor L1. The first capacitor C1 and the first inductor L1 are arranged in parallel. After the first capacitor C1 and the first inductor L1 are arranged in parallel, one end is connected to the connecting line between the first feeding point A and the first feed source 11, and the other end is connected in series with the second capacitor C2 and grounded through the second capacitor. 11 It can be configured as an open circuit for UWB, a large capacitor for the frequency band below 5 GHz, and can be tuned for GPS L5. 11 It can also be configured to filter signals in other frequency bands. 12It may include a second inductor L2, the second inductor L2 is arranged on the connecting line between the first feeding point A and the first feed source 11, one end of the second inductor L2 is connected to one end of the first capacitor C1 and the first inductor L1 arranged in parallel, the other end of the second inductor L2 is connected to the first feed source 11, and the second inductor L2 is configured to block the UWB. In other embodiments, the second inductor L2 can also be configured to block signals in other frequency bands. The newly added matching circuit M0 may include a third capacitor C3 and a third inductor L3, one end of the third capacitor C3 is connected to the first feeding point A, and the other end is connected to the newly added feed source 12; one end of the third inductor L3 is connected to the connecting line between the third capacitor C3 and the newly added feed source 12, and the other end is grounded, and is used to block at least the GPS L5 signal while tuning the UWB.

[0063] In some embodiments, referring to FIG4 , FIG4 is a schematic structural diagram of an antenna assembly provided with a second feed source 14 according to an embodiment of the present application. The antenna assembly may further include a second feed source 14 and a second radiator 15; wherein the second feed source 14 is electrically connected to the second radiator 15 through a second feeding point B, and the second feed source 14 is used to provide a second RF signal, and the second RF signal includes multiple sub-band signals; the second radiator 15 includes a second ground end and a second free end, the second ground end is used for grounding, and a gap is provided between the second free end and the first free end.

[0064] In the embodiment of the present application, the second feed 14 provides a different type of radio frequency signal from the first feed 11 and the newly added feed 12 .

[0065] The second radiator 15 may be an antenna radiator made of a conductive material and may radiate the second radio frequency signal provided by the second feed source 14 into space through its free end.

[0066] In some embodiments, as shown in FIG4 , to ensure the signal quality of the second RF signal, the antenna assembly may further include a second matching circuit M2 disposed between the second feed source 14 and the second feed point B, configured to filter at least the newly added RF signal. In other embodiments, the second matching circuit M2 may also be configured to filter the newly added RF signal, the first RF signal, and signals in other frequency bands to prevent interference.

[0067] In some embodiments, the second matching circuit M2 may be configured by capacitors and / or inductors.

[0068] In some embodiments, in order to switch between multiple sub-band signals, as shown in Figure 4, the antenna assembly may also include a first RF switching circuit S1, one end of the first RF switching circuit S1 is set on the connecting line between the second feed source 14 and the second feed point B, and the other end of the RF switching circuit is grounded for switching the switch channel so that the second radiator 15 can operate in different sub-band signals.

[0069] In some embodiments, the first RF switching circuit S1 may include multiple channels, and a capacitor and / or inductor may be set between each channel and the ground terminal as required to adjust the impedance and frequency characteristics of the signal to achieve efficient signal transmission and switching.

[0070] In some embodiments, referring to FIG5 , FIG5 is a schematic diagram of a partial structure of an antenna assembly provided with a second feed source 14, as provided in a specific example of the present application. The second feed source 14 may be a feed source for providing an MHB signal. The second matching circuit M2 may include a fourth capacitor C4, a fifth capacitor C5, a fourth inductor L4, and a fifth inductor L5. One end of the fifth inductor L5 is connected to the second feed point B, and the other end of the fifth inductor L5 is grounded. One end of the fifth capacitor C5 is connected to the second feed source, and the other end of the fifth capacitor C5 is grounded. The fourth capacitor C4 and the fourth inductor L4 are arranged in series on the connecting line between the fifth inductor L5 and the fifth capacitor C5. The first RF switching circuit S1 includes a switch module Switch, one end of which is arranged between the fifth inductor L5 and the fourth capacitor C4. The switch module is provided with four channels, each of which is provided with an inductor, and the other end of the switch module is grounded through the inductor. In other embodiments, each channel may be provided with a capacitor, or a combination of capacitors and inductors. Different channels may be provided with the same or different configurations.

[0071] In other embodiments, a plurality of second feed sources may be provided, and the plurality of second feed sources are electrically connected to the second radiator 15 through different second feeding points, respectively, and the plurality of second feed sources are used to provide different types of second RF signals.

[0072] In the embodiment of the present application, the multiple second feed sources provide different types of radio frequency signals from the first feed source 11 and the newly added feed source 12 .

[0073] The second radiator 15 can radiate the radio frequency signals provided by the multiple second feed sources into space through its free end.

[0074] Referring to FIG6 , FIG6 exemplarily shows a schematic diagram of the structure of an antenna assembly with two second feed sources, wherein the second feed source 14 on the left can be set in the same manner as the corresponding embodiment of FIG4 or FIG5 , and the second feed source 16 on the right provides a different type of RF signal from the second feed source 14 on the left, the first feed source 11, and the newly added feed source 12. For ease of description, the second feed source 16 on the right is referred to as the third feed source 16, and the second feed source on the left is still referred to as the second feed source 14. The feeding point corresponding to the third feed source 16 can be used as the third feeding point C. It should be noted that the second feed source 14 can be a feed source closer to the gap between the first radiator and the second radiator, and the third feed source 16 can be a feed source away from the gap between the first radiator and the second radiator.

[0075] In some embodiments, in order to avoid signal interference, a third matching circuit M3 may be configured for the third feed source 16. The third matching circuit M3 may be configured by capacitors and / or inductors.

[0076] In some embodiments, referring to FIG7 , FIG7 is a schematic diagram of a partial structure of an antenna assembly provided with the third feed source 16 in FIG6 , provided as a specific example of the present application. The third feed source 16 may be a feed source for providing an N78 or N79 signal. The third matching circuit M3 may include a sixth capacitor C6, a seventh capacitor C7, a sixth inductor L6, a seventh inductor L7, and an eighth inductor L8, wherein one end of the sixth inductor L6 is connected to the third feed point C, and the other end of the sixth inductor L6 is grounded; one end of the seventh capacitor C7 is connected to the third feed source 16, and the other end of the seventh capacitor C7 is grounded; the sixth capacitor C6 and the seventh inductor L7 are connected in parallel and then connected in series with the eighth inductor L8 on the connecting line between the sixth inductor L6 and the seventh capacitor C7. The parameters of each component can be set according to actual needs, and the third matching circuit M3 is at least used to provide a band-stop effect on the MHB signal.

[0077] 8a to 8i, the horizontal axis of each figure represents frequency in GHz, and the vertical axis represents S-parameter or efficiency in decibels (dB). By setting a matching circuit, an antenna assembly with better isolation performance can be obtained. When the first feed 11 is used to provide GPS L5 signals, the newly added feed 12 is used to provide UWB signals, the second feed 14 is used to provide MHB signals, and the third feed 16 is used to provide N78 or N79 signals, refer to Figure 8a, which shows the S parameter (i.e., scattering coefficient) curves corresponding to the four signal types, where S1,1 represents the return loss of the MHB signal, and the marked points 1 to 4 are the four frequency points corresponding to the MHB signal band; S2,2 represents the return loss of the N78 or N79 signal, and the marked points 5 to 8 are the four frequency points corresponding to the N78 or N79 signal band; S3,3 represents the return loss of the GPS L5 signal, and the marked point 9 is the one frequency point corresponding to the GPS L5 signal band; S4,4 represents the return loss of the UWB signal, and the marked points 10 and 11 are the two frequency points corresponding to the UWB signal. The S2,1 curve overlaps with the S1,2 curve, representing the isolation between the MHB antenna and the N78 / N79 antenna. The S3,1 curve overlaps with the S1,3 curve, representing the isolation between the MHB antenna and the GPS L5 antenna. The S4,1 curve overlaps with the S1,4 curve, representing the isolation between the MHB antenna and the UWB antenna. The S3,2 curve overlaps with the S2,3 curve, representing the isolation between the N78 / N79 antenna and the GPS L5 antenna. The S4,2 curve overlaps with the S2,4 curve, representing the isolation between the N78 / N79 antenna and the UWB antenna. The S3,4 curve overlaps with the S4,3 curve, representing the isolation between the GPS L5 antenna and the UWB antenna. The figure shows that the isolation between the UWB and other signals is less than -15dB, and the isolation between each signal is less than -10dB. This indicates minimal interference between the signals and excellent antenna assembly performance.

[0078] Figures 8b and 8c are S-parameter curves and efficiency graphs corresponding to the MHB signal, respectively. Figure 8b shows the return loss of the antenna operating in the B1 / B3 / B40+B41 frequency bands when the first RF switch circuit S1, which matches the MHB signal, switches. Figure 8c shows the antenna efficiency of the antenna operating in the B1 / B3 / B40+B41 frequency bands when the first RF switch circuit S1, which matches the MHB signal, switches. Points 1 and 2 correspond to two frequency points in the B3 frequency band, points 3 and 4 correspond to two frequency points in the B1 frequency band, and points 5 and 6 correspond to two frequency points in the B40+B41 frequency band. Figure 8b shows that when the first RF switch circuit S1 switches, it can cover the three target operating frequency bands of B1 / B3 / B40+B41 and achieve good resonance within the target frequency bands. Figure 8c shows that the antenna efficiency in each target frequency band is between -8dB and -4dB, meeting practical engineering requirements.

[0079] Figures 8d and 8e are the S-parameter curves and efficiency diagrams corresponding to the N78 or N79 signals, respectively. Marked points 1 to 4 correspond to the four frequency points in the N78 or N79 frequency band. It can be seen from the figure that the N78 / N79 antenna efficiency is greater than -7dB, which meets actual engineering requirements.

[0080] Figures 8f and 8g are the S-parameter curves and efficiency diagrams corresponding to the GPS L5 signal, respectively. It can be seen from the figures that when the first RF switch circuit S1 matching the MHB signal is switched (operating in the B1 / B3 / B40+B41 frequency bands, respectively), the S-parameter curves and efficiency curves of the corresponding three GPS L5 signals basically coincide, that is, the return loss and efficiency of the GPS L5 signal remain basically unchanged, the GPS L5 signal is not affected by the switching of the first RF switch circuit S1, and the isolation between the GPS L5 signal and the MHB signal is good.

[0081] Figure 8h and Figure 8i are the S-parameter curve and efficiency diagram corresponding to the UWB signal, respectively. It can be seen from the figure that when the first RF switch circuit S1 matching the MHB signal is switched (operating in the B1 / B3 / B40+B41 frequency bands respectively), the S-parameter curves and efficiency curves of the corresponding three UWB signals basically coincide, that is, the return loss and efficiency of the UWB signal are basically consistent, the UWB signal is not affected by the switching of the first RF switch circuit S1, and the isolation between the UWB signal and the MHB signal is good.

[0082] In some embodiments, as shown in FIG4 , a first RF switching circuit S1 is provided to enable the second radiator 15 to switch between different sub-band signals corresponding to the second feed source 14. However, due to the influence of loss and bandwidth, it is usually difficult to achieve continuous coverage of the second radiator 15 in two sub-band signals. For example, the efficiency of B3 is generally low, and it is difficult to achieve CA (Carrier Aggregation) coverage for such a wide bandwidth as B1+B3 at the same time. Based on this, the present proposal provides an antenna assembly on the other hand, in which the RF switching circuit is replaced by being provided on the branch corresponding to the first feed source 11, so that the first radiator 13 corresponding to the first feed source 11 is used as a parasitic branch of the second feed source 14, thereby achieving continuous coverage of the second radiator 15 in two sub-band signals. For details, please refer to FIG9 and the description below.

[0083] Referring to FIG. 9 , FIG. 9 is a schematic structural diagram of an antenna assembly provided in another embodiment of the present application, which may include:

[0084] A first feed 11, a newly added feed 12, and a first radiator 13, wherein the first feed 11 and the newly added feed 12 are electrically connected to the first radiator 13 via a first feed point A; a second feed 14 on the left, a second feed 16 on the right, and a second radiator 15. For ease of description, the second feed 14 on the left is referred to as the second feed 14, and the second feed 16 on the right is referred to as the third feed 16. The second feed 14 is electrically connected to the second radiator 15 via a second feed point B, and the third feed 16 is electrically connected to the second radiator 15 via a third feed point C;

[0085] A first matching circuit M1' is provided between the first feed source 11 and the first feeding point A, and is used to tune the first radio frequency signal and to stop the band of at least the newly added radio frequency signal;

[0086] A new matching circuit M0 is provided between the new feed source 12 and the first feeding point A, and is used to filter the new radio frequency signal and to stop the first radio frequency signal at least;

[0087] A second matching circuit M2′, which is provided between the second feed source 14 and the second feeding point B and is used to filter at least the newly added radio frequency signal;

[0088] A third matching circuit M3, which is arranged between the third feed source 16 and the third feeding point C and is used to at least perform band rejection on the second radio frequency signal;

[0089] The second RF switch circuit S2 has one end connected to the first matching circuit M1 ′ and the other end grounded, and is used to switch the switch channel so that the first radiator 13 operates in different sub-band signals.

[0090] Among them, the first feed source 11, the newly added feed source 12, the first radiator 13, the second feed source 14, the second radiator 15, the third feed source 16, the newly added matching circuit M0 and the third matching circuit M3 can be set in the same manner as any of the above embodiments. For the sake of brevity, they will not be repeated here. Please refer to the description above for details.

[0091] In some embodiments, the second matching circuit M2' can be obtained by using capacitors and / or inductors. As an example, referring to FIG10, FIG10 is a schematic diagram of the partial structure of an antenna assembly provided with a second matching circuit M2' according to another embodiment of the present application, wherein the second matching circuit M2' may include a fourth capacitor C4, a fifth capacitor C5, a fourth inductor L4, and a fifth inductor L5, one end of the fifth inductor L5 is connected to the second feed point B, and the other end of the fifth inductor L5 is grounded; one end of the fifth capacitor C5 is connected to the second feed source 14, and the other end of the fifth capacitor C5 is grounded, and the fourth capacitor C4 and the fourth inductor L4 are arranged in series on the connecting line between the fifth inductor L5 and the fifth capacitor C5. The parameters of the various electronic components of the second matching circuit M2' shown in FIG10 may be the same as or different from the parameters of the corresponding components of the second matching circuit M2 shown in FIG5.

[0092] In some embodiments, referring to FIG11, FIG11 is a schematic diagram of a partial structure of an antenna assembly provided with a second RF switch circuit S2 according to a specific example of the present application. The first matching circuit M1′ may include a third matching sub-circuit M 13 and the fourth matching sub-circuit M 14 , the third matching sub-circuit M 13 One end of the fourth matching sub-circuit M is provided on the connecting line between the first feeding point A and the first feed source 11, and the other end is connected to the second RF switching circuit S2, and is used to at least filter the newly added RF signal and stop the first RF signal to prevent the switching from affecting the resonance of the first RF signal. 14 Set in the third matching sub-circuit M 13 The connection line between the first feed source 11 is used for impedance adjustment.

[0093] In some embodiments, as shown in FIG. 11 , the third matching sub-circuit M 13 The eighth capacitor C8 and the ninth inductor L9 may be arranged in parallel, wherein one end of the eighth capacitor C8 and the ninth inductor L9 is connected to the first feeding point A and the other end is connected to one end of the second RF switch circuit S2; a fourth matching sub-circuit M 14 The tenth inductor L can be provided in series on a connection line between one end of the eighth capacitor C8 and the ninth inductor L9 provided in parallel and the first feed source 11. 10 , the ninth capacitor C9 and the tenth capacitor C 10 , one end is set between the ninth capacitor C9 and the tenth capacitor C 10 The eleventh capacitor C is connected between the two ends and the other end is grounded 11 , and a twelfth capacitor C connected to the first feed source 11 at one end and grounded at the other end 12 .

[0094] In some embodiments, as shown in FIG11 , the second RF switch circuit S2 may include a switch module Switch, which is provided with four channels, represented as RF1, RF2, RF3, and RF4 from left to right, wherein inductors are provided on RF1 to RF3, respectively, and a capacitor is provided on RF4. The parameter values ​​of the electronic components provided on RF1, RF2, RF3, and RF4 may be set as required. For example, in any switching state of the second RF switch circuit S2, it is possible to ensure that the equivalent impedance formed by the second RF switch circuit S2 and the eighth capacitor C8 and the ninth inductor L9 provided in parallel are equivalent to an open-circuit state for the newly added RF signal, thereby enabling the switching of the signal parasitic path so that the signal parasitic path operates in different sub-band signals, while ensuring that the quality of the first RF signal and the newly added RF signal is not affected.

[0095] As an example, the first feed source 11 can provide a GPS L5 signal, the newly added feed source 12 can provide a UWB signal, and the second feed source 14 can provide an MHB signal. Specifically, it can work in the B1 frequency band, with the branch where the GPS L5 is located as the parasitic branch of the MHB signal. The inductance values ​​set on RF1 to RF3 are 6.2nh, 6.2nh and 0.6nh respectively, the capacitance value set on RF4 is 0.6pf, the value of the eighth capacitor C8 is 3.6pf, and the value of the ninth inductor L9 is 5nh. When the signal parasitic path is made to work in the B3 frequency band corresponding to the MHB signal, the channel RF1 can be selected. At this time, the equivalent impedance composed of the second RF switching circuit S2 and the eighth capacitor C8 and the ninth inductor L9 set in parallel is equivalent to a large inductance (equal to) for the UWB signal. The effective inductance can be greater than 5nH), which is equivalent to an open-circuit state for UWB signals. When the signal parasitic path operates in the B40 frequency band corresponding to the MHB signal, channels RF3 and RF4 can be selected. At this time, the equivalent impedance formed by the second RF switch circuit S2 and the parallel eighth capacitor C8 and ninth inductor L9 is equivalent to a small inductor (the equivalent capacitance value can be less than 1pF), which is equivalent to an open-circuit state for UWB signals. This allows switching between different sub-bands corresponding to MHB, combining the B1 frequency band to achieve CA coverage with multiple bandwidths, while also ensuring the quality of GPS L5 and UWB signals. In addition, the parasitic branches can also reduce the SAR (specific absorption rate) value of the sub-band signals.

[0096] As shown in Figures 8b and 8(c), when the first RF switch circuit S1 corresponding to the MHB signal is set, the average efficiency of B3 is approximately -5.8dB, the bandwidth is relatively narrow, and there is no B1+B3 CA state. By replacing the RF switch circuit with one set on the branch corresponding to GPS L5, that is, setting the second RF switch circuit S2, the average efficiency of B3 is improved and the B1+B3 CA state is achieved. In addition, the isolation between the various signals can be guaranteed. For details, see the following Figures 12a to 12h, which show the corresponding S-parameter curves and efficiency diagrams when the first feed source 11 in Figure 9 is used to provide the GPS L5 signal, the additional feed source 12 is used to provide the UWB signal, the second feed source 14 is used to provide the MHB signal, and the third feed source 16 is used to provide the N78 or N79 signal.

[0097] Specifically, Figures 12a and 12b are respectively the S parameter curve graph and efficiency graph corresponding to the MHB signal after setting the second RF switch circuit S2. Figure 12a shows the return loss of the antenna operating in the B3+B1 / B40 / B41 frequency bands when the second RF switch circuit S2 is switched, and 12b shows the antenna efficiency of the antenna operating in the B3+B1 / B40 / B41 frequency bands when the second RF switch circuit S2 is switched; in the figure, marked points 1 and 2 correspond to two frequency points in the B3+B1 frequency band, marked points 3 and 4 correspond to two frequency points in the B40 frequency band, and marked points 5 and 6 correspond to two frequency points in the B41 frequency band.

[0098] Figures 12c and 12d are the S-parameter curves and efficiency diagrams corresponding to the N78 and N79 signals, respectively. The marked points 1 and 2 correspond to the two frequency points in the N78 frequency band, and the marked points 3 and 4 correspond to the two frequency points in the N79 frequency band.

[0099] Figures 12e and 12f are the S-parameter curve and efficiency diagram corresponding to the GPS L5 signal, respectively. As can be seen from Figure 12f, when the second RF switch circuit S2 is switched (operating in the B3+B1 / B40 / B41 frequency bands, respectively), the efficiency curves of the corresponding three GPS L5 signals basically coincide, that is, the GPS L5 signal is not affected by the switching of the second RF switch circuit S2, and the isolation between the GPS L5 signal and the MHB signal is good.

[0100] Figures 12g and 12h are the S-parameter curves and efficiency diagrams corresponding to the UWB signal, respectively. It can be seen from the figures that when the second RF switch circuit S2 is switched (operating in the B3+B1 / B40 / B41 frequency bands respectively), the return loss and efficiency of the corresponding three UWB signals are not much different. The UWB signal is less affected by the switching of the second RF switch circuit S2, and the isolation between the UWB signal and the MHB signal is good.

[0101] In addition, referring to Figure 13, Figure 13 is a B3 efficiency comparison diagram obtained based on the antenna component scheme of Figure 11 of the present application and the scheme of Figure 4, wherein the marked point 1 corresponds to the B3 frequency point obtained based on Figure 11 of the present application, and the marked point 2 corresponds to the B3 frequency point obtained based on Figure 4 of the present application. The input power is set to 23dBm, and the SAR obtained by the two schemes at 1.75GHz are 1.14W / kg and 1.16W / kg respectively, that is, the scheme based on Figure 11 of the present application is beneficial to reducing the SAR value of B3.

[0102] Another aspect of the present application further provides an electronic device, which may include any of the above-mentioned antenna assemblies. Based on the above-mentioned antenna assembly, it is beneficial to improve the communication quality of the electronic device and achieve overall miniaturization. Exemplary electronic devices may include: mobile phones, tablet computers, laptop computers, PDAs, vehicle-mounted electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks or personal digital assistants (PDAs), network attached storage (NAS), personal computers (PCs), televisions, ATMs or self-service machines, etc., and the embodiments of the present application are not specifically limited.

[0103] In some embodiments, referring to FIG14 , FIG14 is a schematic diagram of a mobile phone antenna structure provided in the present application, which may include a metal frame arranged on the periphery of the mobile phone, which may serve as a radiator of the antenna, and a first feeding point A is used to connect a first feed source and a newly added feed source (not shown in the figure), and a second feeding point B and a third feeding point C are used to connect different second feed sources (not shown in the figure).

[0104] Thus far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of the present application is obviously not limited to these specific embodiments. Without departing from the principles of the present application, those skilled in the art may make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will fall within the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: include: a first feed source, a newly added feed source, and a first radiator; The first feed and the newly added feed are electrically connected to the first radiator through a first feeding point, the first feed is used to provide a first radio frequency signal, the newly added feed is used to provide a newly added radio frequency signal, and the first frequency band corresponding to the first radio frequency signal and the newly added frequency band corresponding to the newly added radio frequency signal are independent of each other, and the newly added feed is used to provide a UWB signal; The first radiator includes a first grounding end and a first free end, and the first grounding end is used for grounding.

2. The antenna assembly according to claim 1, wherein: The antenna assembly also includes a first matching circuit, which is arranged between the first feed source and the first feed point, and is used to tune the first radio frequency signal and at least block the newly added radio frequency signal.

3. The antenna assembly according to claim 2, wherein: The first matching circuit includes a first matching sub-circuit and a second matching sub-circuit; The first matching subcircuit includes a first capacitor, a second capacitor, and a first inductor. The first capacitor and the first inductor are arranged in parallel. After the first capacitor and the first inductor are arranged in parallel, one end is connected to the connecting line between the first feeding point and the first feed source, and the other end is connected in series with the second capacitor and grounded through the second capacitor. The second matching subcircuit includes a second inductor, which is arranged on the connecting line between the first feeding point and the first feed source, one end of the second inductor is connected to one end of the first capacitor and the first inductor arranged in parallel, and the other end of the second inductor is connected to the first feed source.

4. The antenna assembly according to claim 2, wherein: The antenna assembly further includes a second feed source and a second radiator; The second feed source is electrically connected to the second radiator through a second feeding point, and the second feed source is used to provide a second radio frequency signal, and the second radio frequency signal includes a plurality of sub-band signals; The second radiator includes a second grounding end and a second free end. The second grounding end is used for grounding. A gap is provided between the second free end and the first free end.

5. The antenna assembly according to claim 4, wherein: There are multiple second feed sources, and the multiple second feed sources are electrically connected to the second radiator through different second feeding points. The multiple second feed sources are used to provide different types of second radio frequency signals.

6. The antenna assembly according to claim 4, wherein: The antenna assembly also includes a second matching circuit, which is arranged between the second feed source and the second feed point and is used to filter at least the newly added radio frequency signal.

7. The antenna assembly according to claim 6, wherein: When the second feed source is used to provide an MHB signal, the second matching circuit includes a fourth capacitor, a fifth capacitor, a fourth inductor, and a fifth inductor, one end of the fifth inductor is connected to the second feed point, the other end of the fifth inductor is grounded, one end of the fifth capacitor is connected to the second feed source, the other end of the fifth capacitor is grounded, and the fourth capacitor and the fourth inductor are arranged in series on a connecting line between the fifth inductor and the fifth capacitor; When the second feed source is used to provide the N78 or N79 signal, the second matching circuit includes a sixth capacitor, a seventh capacitor, a sixth inductor, a seventh inductor and an eighth inductor, one end of the sixth inductor is connected to the second feed point, and the other end of the sixth inductor is grounded; one end of the seventh capacitor is connected to the second feed source, and the other end of the seventh capacitor is grounded; the sixth capacitor and the seventh inductor are connected in parallel and then connected in series with the eighth inductor on the connecting line between the sixth inductor and the seventh capacitor.

8. The antenna assembly according to claim 6, wherein: The antenna assembly also includes a first RF switching circuit, one end of which is arranged on the connecting line between the second feed source and the second feeding point, and the other end of the RF switching circuit is grounded, and is used to switch the switching channel so that the second radiator operates in different sub-band signals.

9. The antenna assembly according to claim 4, wherein: The antenna assembly also includes a second RF switching circuit, one end of which is connected to the first matching circuit, and the other end of which is grounded, for switching the switch channel so that the first radiator operates in different sub-band signals.

10. The antenna assembly according to claim 9, wherein: The first matching circuit includes a third matching sub-circuit and a fourth matching sub-circuit; The third matching sub-circuit includes an eighth capacitor and a ninth inductor connected in parallel, wherein one end of the eighth capacitor and the ninth inductor connected in parallel is connected to the first feeding point, and the other end is connected to one end of the second RF switch circuit; The fourth matching sub-circuit includes a tenth inductor, a ninth capacitor and a tenth capacitor arranged in series on a connecting line between one end of the eighth capacitor and the ninth inductor arranged in parallel and the first feed source, an eleventh capacitor with one end arranged on a connecting line between the ninth capacitor and the tenth capacitor and the other end grounded, and a twelfth capacitor with one end connected to the first feed source and the other end grounded.

11. The antenna assembly according to any one of claims 1 to 10, characterized in that: The antenna assembly also includes a newly added matching circuit, which is arranged between the newly added feed source and the first feeding point, and is used to filter the newly added radio frequency signal and at least block the first radio frequency signal.

12. The antenna assembly according to claim 11, wherein: The newly added matching circuit includes a third capacitor and a third inductor, one end of the third capacitor is connected to the first feeding point, the other end of the third capacitor is connected to the newly added feed source, one end of the third inductor is connected to the connecting line between the third capacitor and the newly added feed source, and the other end of the third inductor is grounded.

13. The antenna assembly according to claim 1, wherein: The first feed source is used to provide a GPS L5 signal.

14. An electronic device, characterized in that: An antenna assembly comprising the antenna assembly according to any one of claims 1 to 13.

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