Antenna device

Abstract

The present invention relates to an antenna device comprising a first feed tap, a second feed tap, and a radiator connected between the first feed tap and the second feed tap. The first feed tap comprises a first feed point and a first filter circuit electrically connected between the first feed point and the radiator, the first feed point being used to feed a signal of a first frequency band. The second feed tap comprises a second feed point and a second filter circuit electrically connected between the second feed point and the radiator, the second feed point being used to feed a signal of a second frequency band.The first filter circuit is used to allow the signal from the first frequency band to pass and the signal from the second frequency band to be grounded. The second filter circuit is used to allow the signal from the second frequency band to pass and the signal from the first frequency band to be grounded. The antenna device of the present application is provided with a high degree of adaptability, has multifrequency performance, expands the bandwidth of an antenna, and is applicable in a multifrequency terminal. A terminal in the embodiments of the present application is also provided.

Description

1 / 42 Descriptive Report of the Invention Patent for ANTENNA APPARATUS. TECHNICAL FIELD

[001] The present invention relates to the field of antenna technologies and in particular, to a loop antenna apparatus. BACKGROUND

[002] A loop antenna is widely used in mobile terminal products. A conventional loop antenna includes a feed point and a ground point, so that signals from different frequency bands (e.g., a high-frequency signal and a low-frequency signal) match using the same matching circuit. When a low-frequency band is tuned, a high-frequency impedance location changes. Similarly, when a high-frequency band is tuned, a low-frequency impedance location changes. The impact of high-frequency matching on a low-frequency signal cannot be eliminated, and the impact of low-frequency matching on a high-frequency signal cannot be eliminated. Consequently, the antenna cannot be matched to an ideal condition. SUMMARY

[003] Modalities of this application provide an antenna device, and the antenna device has a good adaptation condition, so that a wider bandwidth is implemented.

[004] According to one aspect, an embodiment of this application provides an antenna apparatus. The antenna apparatus includes a first feed tap circuit, a second feed tap circuit, and a radiator connected between the first feed tap circuit and the second feed tap circuit. Petition 870250000152, dated 02 / 01 / 2025, page 9 / 112 2 / 42 of feeding.

[005] The first power supply bypass circuit includes a first power supply point and a first filter circuit electrically connected between the first power supply point and the radiator, wherein the first power supply point is configured to feed a signal from a first frequency range.

[006] The second power supply bypass circuit includes a second power supply point and a second filter circuit electrically connected between the second power supply point and the radiator, and the second power supply point is configured to feed a signal from a second frequency range.

[007] The first filter circuit is configured to: allow the signal from the first frequency band to pass, and ground the signal from the second frequency band.

[008] The second filter circuit is configured to: allow the signal from the second frequency band to pass through, and ground the signal from the first frequency band.

[009] The first filter circuit and the second filter circuit are arranged, the first filter circuit allows the signal that is from the first frequency band and that is fed by the first feed point to pass, and blocks the signal that is from the second frequency band and that is fed by the second feed point, and the second filter circuit allows the signal that is from the second frequency band and that is fed by the second feed point to pass, and blocks the signal that is from the first frequency band and that is fed by the first feed point. Thus, this is equivalent to the antenna device implementing, in a radiator, equivalent antenna functions in two different frequency bands (for example, a low frequency and a high frequency), so that the antenna device has a good Petition 870250000152, dated 02 / 01 / 2025, page 10 / 112 3 / 42 adaptation condition, has multifrequency performance, extends the antenna bandwidth, and can be applied to a multifrequency terminal.

[0010] In one implementation, the first power supply bypass circuit still includes a first electrically connected adapter circuit between the first power supply point and the first filter circuit, configured to adjust a resonant frequency of the signal from the first frequency band; and the second power supply bypass circuit still includes a second electrically connected adapter circuit between the second power supply point and the second filter circuit, configured to adjust a resonant frequency of the signal from the second frequency band.

[0011] The first adaptation circuit and the second adaptation circuit are arranged so that the signal from the first frequency band and the signal from the second frequency band adapt by using different adaptation circuits. In this way, interference between signals of different frequencies (for example, a high-frequency signal and a low-frequency signal) with each other can be avoided, the antenna bandwidth can be extended, and multifrequency performance is implemented.

[0012] In one implementation, the first power tap circuit and the second power tap circuit are symmetrically arranged on either side of a centerline, and the radiator has a symmetrically distributed architecture along the centerline. Specifically, the radiator includes a first area, a second area, and a third area. The first area and the third area are arranged on opposite sides of the second area. The first power tap circuit and the second power tap circuit are electrically connected to the Petition 870250000152, dated 02 / 01 / 2025, page 11 / 112 4 / 42 second area, and the centerline is a centerline of the second area. The first area and the third area are symmetrically distributed on both sides of the second area. According to the preceding arrangement, the radiator can alternatively be of a symmetrical structure along the second area. The first feeder tap circuit and the second feeder tap circuit are symmetrical along the centerline, so that the centerline passes through a center of the second area of ​​the radiator. In this case, the antenna apparatus is of a symmetrical structure along the centerline in general, and the structure is simple and easy to implement.

[0013] The preceding arrangement facilitates the placement of the locations of the first power supply tap circuit and the second power supply tap circuit on a terminal, so that a length of a feeder that electrically connects a terminal chip with the first power supply tap circuit can be determined in advance, and thus the impedance combination of the antenna apparatus can be adjusted.

[0014] In one implementation, the first power supply tap circuit includes a first inductor, a second inductor, a third inductor, a first capacitor, and a second capacitor. The second inductor is connected in series between the first power supply point and a ground. The first inductor and the third inductor are successively connected in series between the ground and an end that is of the second inductor and that is distant from the ground.The first capacitor and the second capacitor are successively connected in series between ground and one end of the third inductor, which is distant from ground. The heatsink is electrically connected to one end of the second capacitor, which is distant from ground. The first inductor, the second inductor, and the third inductor form the first adapter circuit, and the first capacitor and the second... Petition 870250000152, dated 02 / 01 / 2025, page 12 / 112 The 5 / 42 capacitor forms the first filter circuit.

[0015] According to the preceding provision, a function to allow the signal of the first frequency band to pass and block the signal of the second frequency band through the first filter circuit in an implementation is implemented, and a function to perform impedance matching by the first matching circuit in an implementation is implemented. Certainly, the preceding implementations do not impose limitations regarding the specific architectures of the first filter circuit and the first matching circuit in this application.

[0016] In one implementation, the second power supply bypass circuit includes a third capacitor, a fourth capacitor, a fourth inductor, and a fifth inductor. The third capacitor is connected in series between the second power supply point and ground. The fourth inductor is connected in series between ground and one end of the third capacitor that is distant from ground. The fourth capacitor and the fifth inductor are successively connected in series between ground and one end of the fourth inductor that is distant from ground. The third capacitor forms the second adapter circuit, and the fourth inductor, the fourth capacitor, and the fifth inductor form the second filter circuit.

[0017] Similarly, the preceding implementations do not impose limitations with respect to the specific architectures of the second filter circuit and the second adaptation circuit in this application.

[0018] In one implementation, the radiator includes a first area, a second area, and a third area. The first area and the third area are arranged on opposite sides of the second area. The first power supply bypass circuit and the second power supply bypass circuit are electrically connected to the first area. Specifically, the first power supply bypass circuit of Petition 870250000152, dated 02 / 01 / 2025, page 13 / 112 6 / 42 The power supply and the second power supply tap circuit are symmetrically distributed on either side of a first centerline. The radiator has a symmetrically distributed architecture along a second centerline. The first centerline deviates from the second centerline, and the first and second centerlines are not collinear. Thus, a decentralized tap structure is formed in the antenna apparatus.

[0019] According to the preceding arrangement, a specific location for a component when being placed in the terminal can be avoided, so that the arrangement of the antenna device is more flexible.

[0020] In one implementation, the antenna apparatus still includes a first switch and at least one ground tap. The at least one ground tap is connected in parallel between the first switch and ground. The first switch is electrically connected to the radiator and is located on a side of the radiator that is close to the second power tap circuit. The first switch cooperates with the at least ground tap to exchange an electrical length of the signal from the first frequency band.

[0021] The first switch is arranged so that the first switch can cooperate with at least one derivation from the ground to change the electrical length of the signal of the first frequency band.

[0022] In one implementation, an impedance component is placed on each tap from ground to adjust an electrical length of the radiator.

[0023] The bandwidth of the first frequency band can be extended by the arrangement of the first switch, the ground tap, and the impedance component.

[0024] In one implementation, the antenna apparatus also includes a radiation tap, a second switch, a first Petition 870250000152, dated 02 / 01 / 2025, page 14 / 112 7 / 42 ground tap, and at least one second ground tap. The first ground tap is connected in series between the second switch and the second filter circuit. At least one second ground tap is connected in parallel between the second switch and ground. The radiation tap is electrically connected with one end that is from the second filter circuit and that is connected to the first ground tap.

[0025] The second switch cooperates with the first ground tap or with at least one second ground tap, so that various operating modes of the antenna device can be implemented. In this way, the antenna device has multifrequency performance, and the resonance frequencies of a high-frequency signal and a low-frequency signal can be adjusted.

[0026] In one implementation, the radiation branch is arranged to be separate from the radiator, and the physical electrical length of the radiation branch is shorter than the physical electrical length of the radiator.

[0027] The physical electrical length of the radiation tap is established to be shorter than the physical electrical length of the radiator, so that a radiation requirement of the second frequency band signal can be met. To avoid mutual radiation interference, the radiation tap needs to be separated from the radiator by a specific distance, to ensure sufficient antenna isolation.

[0028] In one implementation, the first power supply bypass circuit includes a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor, a third inductor, and a fourth inductor. The second capacitor is connected in series between the second power supply point and ground. The second Petition 870250000152, dated 02 / 01 / 2025, page 15 / 112 The 8 / 42 inductor is connected in series between ground and one end of the second capacitor, which is distant from ground. The first capacitor, the first inductor, and the third inductor are successively connected in series between ground and one end of the second inductor, which is distant from ground. The fourth inductor and the third capacitor are successively connected in series between ground and one end of the third inductor, which is distant from ground. The heatsink is electrically connected to one end of the fourth inductor, which is distant from ground. The first capacitor, the second capacitor, the first inductor, and the second inductor form the first adapter circuit, and the third capacitor, the third inductor, and the fourth inductor form the first filter circuit.

[0029] According to the preceding arrangement, the function of allowing the signal of the first frequency band to pass and blocking the signal of the second frequency band by the first filter circuit is implemented, and the function of performing impedance matching by the first matching circuit is implemented.

[0030] In one implementation, the second power supply bypass circuit includes a fourth capacitor, a fifth capacitor, a fifth inductor, a sixth inductor, and a seventh inductor. The fifth inductor is connected in series between the second power supply point and ground. The fourth capacitor, the fifth capacitor, and the seventh inductor are successively connected in series between ground and one end of the fifth inductor that is distant from ground. The sixth inductor is connected in parallel with two ends of the fifth capacitor. The heat sink is electrically connected to one end of the seventh inductor that is distant from ground. The fourth capacitor and the fifth inductor form the second adapter circuit, and the fifth capacitor, the sixth inductor, and the seventh inductor form the second filter circuit. Petition 870250000152, dated 02 / 01 / 2025, page 16 / 112 9 / 42

[0031] According to the preceding arrangement, a function to allow the signal of the second frequency band to pass and block the signal of the first frequency band by the second filter circuit is implemented, and a function to perform impedance matching by the second matching circuit is implemented.

[0032] In one implementation, the antenna apparatus also includes a duplexer. The duplexer includes an input port, a first output port, and a second output port. The first output port is configured as the first feed point, the second output port is configured as the second feed point. The first filter circuit is electrically connected to the first output port, the second filter circuit is electrically connected to the second output port. The antenna apparatus also includes a general feed point. The general feed point is electrically connected to the input port.

[0033] The duplexer is arranged so that the number of power points is reduced. This facilitates a component space layout within a terminal.

[0034] According to another aspect, an embodiment of this application further provides a terminal. The terminal includes a motherboard and the antenna apparatus according to any of the implementations of the preceding aspect. A first power supply tap circuit and a second power supply tap circuit for the antenna apparatus are arranged on the motherboard.

[0035] The first power supply tapping circuit and the second power supply tapping circuit of the antenna device are located on the motherboard. This simplifies the implementation of this request.

[0036] In one implementation, the terminal still includes a metal frame. At least part of a radiator for the device. Petition 870250000152, dated 01 / 02 / 2025, p. 17 / 112 The 10 / 42 antenna is configured as the metal frame, and each of the first feed tap circuit and the second feed tap circuit is electrically connected to the metal frame.

[0037] In one implementation, the terminal includes an interface. USB. The metal frame is configured as a structure on one side of the USB interface.

[0038] According to the preceding provision, there is no other metal shielding for the antenna apparatus, so the antenna apparatus does not need to consider free space.

[0039] In one implementation, the first power supply bypass circuit and the second power supply bypass circuit are respectively arranged on the two sides of the USB interface.

[0040] According to the preceding arrangement, the antenna device is symmetrically arranged in relation to the USB interface, so that the structure is simple.

[0041] In one implementation, the first power supply bypass circuit and the second power supply bypass circuit are arranged on the same side of the USB interface.

[0042] According to the preceding arrangement, space is reserved for arranging another component, and the structure is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required to describe the embodiments of the present invention or of the prior art.

[0044] Figure 1-1 is a schematic structural diagram of an antenna apparatus according to a first embodiment of this application; Petition 870250000152, dated 02 / 01 / 2025, page 18 / 112 11 / 42

[0045] Figure 1-2 is a schematic structural diagram of an equivalent antenna of the antenna apparatus in Figure 1-1;

[0046] Figure 1-3 is a schematic structural diagram of another equivalent antenna of the antenna apparatus in Figure 1-1;

[0047] Figure 1-4 is a schematic diagram of a circuit structure of an implementation of the antenna apparatus in Figure 11;

[0048] Figure 1-5 is a schematic diagram of an area division of a radiator of an antenna apparatus in an implementation of Figure 1-1;

[0049] Figure 1-6 is a schematic area division diagram of a radiator in an antenna device in another implementation of Figure 1-1;

[0050] Figure 1-7 is a schematic diagram of S11 (input return loss) of the antenna apparatus in Figure 1-1;

[0051] Figure 1-8 is a schematic diagram of the basic current distribution of the antenna apparatus shown in Figure 1-1, which is in a resonance mode of 0.5λ;

[0052] Figure 1-9 is a schematic diagram of a basic current distribution of the antenna apparatus shown in Figure 1-1, which is in a 0.5λ resonance mode generated by the adaptation;

[0053] Figure 1-10 is a schematic diagram of a basic current distribution of the antenna apparatus shown in Figure 1-1, which is in a 1λ resonance mode;

[0054] Figure 1-11 is a schematic diagram of the basic current distribution of the antenna apparatus shown in Figure 1-1, which is in a 1.5λ resonance mode;

[0055] Figure 1-12 is a schematic diagram of the basic current distribution of the antenna apparatus shown in Figure 1-1 and Petition 870250000152, dated 02 / 01 / 2025, page 19 / 112 12 / 42 which is in a 2.0λ resonance mode;

[0056] Figure 1-13 is a schematic diagram of the basic current distribution of the antenna apparatus shown in Figure 1-1, which is in a 2.5λ resonance mode;

[0057] Figure 1-14 is a partial schematic structure diagram of a terminal in which the antenna apparatus in an implementation of Figure 1-1 is arranged;

[0058] Figure 1-15 is a schematic planar diagram of the Figure 1-14;

[0059] Figure 1-16 is a partial schematic structural diagram of a terminal in which the antenna apparatus in another implementation of Figure 1-1 is arranged;

[0060] Figure 1-17 is a schematic planar diagram of the Figure 1-16;

[0061] Figure 1-18 is a schematic diagram of S11 (input return loss) of an antenna apparatus provided in an implementation of this application;

[0062] Figure 2-1 is a schematic structural diagram of an antenna apparatus according to a second embodiment of this application;

[0063] Figure 2-2 is a schematic diagram of S11 (input return loss) of the antenna apparatus in Figure 2-1;

[0064] Figure 3-1 is a schematic structural diagram of an antenna apparatus according to a third embodiment of this application;

[0065] Figure 4-1 is a schematic diagram of a circuit structure of an antenna apparatus according to a fourth embodiment of this application;

[0066] Figure 4-2 is a schematic diagram of S11 (input return loss) of the antenna apparatus shown in Figure 4-1; Petition 870250000152, dated 02 / 01 / 2025, page 20 / 112 13 / 42

[0067] Figure 5-1 is a schematic diagram of a circuit structure of an antenna apparatus according to a fifth embodiment of this application; and

[0068] Figure 5-2 is a schematic diagram of S11 (input return loss) of the antenna apparatus shown in Figure 5-1. DESCRIPTION OF MODALITIES

[0069] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following clearly and completely describes the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Apparently, the embodiments described are merely a part rather than all the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort shall fall within the scope of protection of this application.

[0070] This application relates to an antenna device that is applied to a terminal. The terminal can be a mobile phone, a tablet, a home network interconnection device, among others. The antenna device is a loop antenna (frame antenna). The antenna device can be applied to a GSM antenna, an LTE antenna, a WCDMA antenna, among others, or it can be applied to a GPS frequency band, a Wi-Fi frequency band, a 5G frequency band, a WiMAX frequency band, among others.

[0071] Figure 1-1 is a schematic structural diagram of an antenna apparatus according to a first embodiment of this application. The antenna apparatus includes a first feed tap circuit k11, a second feed tap circuit k12, and a radiator 13 connected between the first feed tap circuit k11 and the second feed tap circuit. Petition 870250000152, dated 01 / 02 / 2025, p. 21 / 112 14 / 42 k12. The first feed-through circuit k11 includes a first feed-through point 10 and a first filter circuit 12 electrically connected between the first feed-through point 10 and the radiator 13. The first feed-through point 10 is configured to feed a signal from a first frequency band. In one implementation, the first feed-through circuit k11 further includes a first adaptation circuit 11. The first adaptation circuit 11 is electrically connected between the first feed-through point 10 and the first filter circuit 12. The first adaptation circuit 11 is configured to adjust an impedance of the antenna apparatus so that the radiation from the antenna apparatus to the signal of the first frequency band is resonated. In another implementation, the first adaptation circuit 11 may alternatively be integrated within the first filter circuit 12.The second feed-by-switch circuit k12 includes a second feed-in point 16 and a second filter circuit 14 electrically connected between the second feed-in point 16 and the radiator 13. The second feed-in point 16 is configured to feed a signal from a second frequency band. In one implementation, the second feed-by-switch circuit k11 further includes a second adapter circuit 15. The second adapter circuit 15 is electrically connected between the second feed-in point 16 and the second filter circuit 14. The second adapter circuit 15 is configured to adjust the impedance of the antenna apparatus so that the radiation from the antenna apparatus to the signal of the second frequency band is resonated. In another implementation, the second adapter circuit 15 may alternatively be integrated within the second filter circuit 14.The first filter circuit 12 is configured to: allow the signal from the first frequency band to pass through and ground the signal from the second. Petition 870250000152, dated 02 / 01 / 2025, page 22 / 112 15 / 42 frequency band. The second filter circuit 14 is configured to: allow the signal from the second frequency band to pass, and ground the signal from the first frequency band. The frequencies of the first frequency band and the second frequency band are different. For example, the first frequency band is a low frequency, and the second frequency band is a high frequency.

[0072] In one implementation, the radiator 13 includes a first end and a second end. The first end of the radiator 13 is electrically connected to the first power supply bypass circuit k11, and the second end of the radiator 13 is electrically connected to the second power supply bypass circuit k12. Specifically, the first end of the radiator 13 is electrically connected to the first filter circuit 12, and the second end of the radiator 13 is electrically connected to the second filter circuit 14. A docking frame antenna architecture is formed by connecting the radiator 13 to the first power supply bypass circuit k11 and to the second power supply bypass circuit k12.

[0073] Due to the arrangement of the first filter circuit 12 and the second filter circuit 14, the signal from the first frequency band, fed by the first power supply point 10, can pass through the first filter circuit 12, and the first filter circuit 12 blocks the signal from the second frequency band, fed by the second power supply point 16, preventing it from passing and grounding the signal from the second frequency band; and, the signal from the second frequency band, fed by the second power supply point 16, can pass through the second filter circuit 14, and the second filter circuit 14 blocks the signal from the first frequency band, fed by the first power supply point 10, preventing it from passing and grounding the signal from the Petition 870250000152, dated 02 / 01 / 2025, page 23 / 112 16 / 42 first frequency band. Thus, this is equivalent to the antenna apparatus in this application implementing, in a radiator 13, equivalent antenna functions in two frequency bands, so that the antenna apparatus has good adaptability, has multifrequency performance, extends the antenna bandwidth, and can be applied to a multifrequency terminal. Figure 1-2 is a schematic structural diagram of an equivalent antenna of the antenna apparatus in Figure 1-1. Figure 1-3 is a schematic structural diagram of another equivalent antenna of the antenna apparatus in Figure 1-1. Referring to Figure 1-1 and Figure 1-2, the first feed point 10 of the first feed tap circuit k11 feeds the signal of the first frequency band.The signal from the first frequency band can pass through the first filter 12 after being adapted using the first adaptation circuit 11, but it cannot pass through the second filter 14. The second filter 14 grounds the signal from the first frequency band, and the first power supply point 10 feeds a radio frequency signal to excite the radiator 13, so that the radiator 13 generates an electromagnetic wave radiated into the surrounding space. In this way, an antenna function to transmit the signal from the first frequency band is implemented. Referring to Figure 1-1 and Figure 1-3, the second power supply point 16 of the second feed-through circuit k12 feeds the signal from the second frequency band. The signal from the second frequency band can pass through the second filter 14 after being adapted using the second adaptation circuit 15, but it cannot pass through the first filter 12.The first filter 12 grounds the signal from the second frequency band, and the second feed point 16 feeds a radio frequency signal to excite the radiator 13, so that the radiator 13 generates a wave. Petition 870250000152, dated 02 / 01 / 2025, page 24 / 112 17 / 42 electromagnetic radiation is radiated into the surrounding space. In this way, an antenna function to transmit the signal of the second frequency band is implemented.

[0074] The first adaptation circuit 11 and the second adaptation circuit 15 are arranged so that the signal from the first frequency band and the signal from the second frequency band adapt by using different adaptation circuits. In this way, interference between the high-frequency signal and a low-frequency signal can be avoided, the antenna bandwidth can be understood, and multifrequency performance is implemented.

[0075] In one implementation, the first feed tap circuit k11 and the second feed tap circuit k12 are symmetrically arranged on either side of a centerline. Specifically, referring to Figure 1-1, a centerline A1 is established. Alternatively, a location for centerline A1 may be adjusted according to a different specific implementation of the antenna apparatus. The first feed tap circuit k11 and the second feed tap circuit k12 are symmetrically arranged along centerline A1, so that locations where the first feed tap circuit k11 and the second feed tap circuit k12 are accommodated are designated on the terminal.In addition, the lengths of feeders that electrically connect a terminal chip (which is not shown in the figure) with the first feeder tap circuit k11 and with the second feeder tap circuit k12 can be determined in advance, and thus the impedance matching of the antenna device can be adjusted.

[0076] Figure 1-4 is a schematic diagram of a circuit structure of the antenna apparatus. The first branch circuit of Petition 870250000152, dated 02 / 01 / 2025, page 25 / 112 The 18 / 42 k11 power supply includes a first inductor 111, a second inductor 112, a third inductor 113, a first capacitor 121, and a second capacitor 122. The second inductor 112 is connected in series between the first power supply point 10 and ground. The first inductor 111 and the third inductor 113 are successively connected in series between ground and one end of the second inductor 112 that is distant from ground. The first capacitor 121 and the second capacitor 122 are successively connected in series between ground and one end of the third inductor 113 that is distant from ground. The heat sink 13 is electrically connected to one end of the second capacitor 122 that is distant from ground. The first inductor 111, the second inductor 112, and the third inductor 113 form the first adapter circuit 11, and the first capacitor 121 and the second capacitor 122 form the first filter circuit 12.

[0077] Furthermore, the second k12 power supply bypass circuit includes a third capacitor 151, a fourth capacitor 141, a fourth inductor 142, and a fifth inductor 143. The third capacitor 151 is connected in series between the second power supply point 16 and ground. The fourth inductor 142 is connected in series between ground and one end of the third capacitor 151 that is distant from ground. The fourth capacitor 141 and the fifth inductor are successively connected in series between ground and one end of the fourth inductor 142 that is distant from ground. The third capacitor 151 forms the second adapter circuit 15, and the fourth inductor 142, the fourth capacitor 141, and the fifth inductor 143 form the second filter circuit 14.

[0078] A key circuit idea in Figure 1-4 is as follows. Because an alternating current signal has a magnitude-phase characteristic, and a capacitor and an inductor have different frequency response characteristics in Petition 870250000152, dated 02 / 01 / 2025, page 26 / 112 19 / 42 different frequencies, a frequency of the current signal that is from the first frequency band and that is fed by the first power supply point 10 is lower than a frequency of the current signal that is from the second frequency band and that is fed by the second power supply point 16. The first inductor 111 and the first capacitor 121 can also allow the signal that is from the first frequency band and whose frequency is lower to pass, and after resonance is generated in the radiator 13, a current is grounded after flowing through the fourth capacitor 141 and the third capacitor 151. In this case, an effect of the equivalent antenna of the antenna apparatus shown in Figure 1-2 is formed. The second power supply point 16 feeds the current signal from the second frequency band.The fourth capacitor 141 can allow the signal, which is from the second frequency band and has a higher frequency, to pass through. After resonance is generated in the radiator 13, a current is grounded after flowing through the second capacitor 122. In this case, an equivalent antenna effect of the antenna apparatus shown in Figure 1-3 is formed. To adjust a frequency band of the current signal to meet a requirement of the impedance combination, the grounded pass capacitors and pass inductors of the second inductor 112, the third inductor 113, the second capacitor 122, the third capacitor 151, the fourth inductor 142, and the fifth inductor 143 need to be arranged so as to adjust the impedance combination of the antenna apparatus to an ideal condition.

[0079] Specific values ​​of each capacitor and each inductor in Figure 1-4 is not limited in this application. However, for better understanding, a preferred implementation is provided. As marked in Figure 1-4, the inductance value of the first inductor 111 is 1 nH, the inductance value of the second inductor 112 is 6.8 nH, and... Petition 870250000152, dated 02 / 01 / 2025, page 27 / 112 20 / 42 The inductance value of the third inductor 113 is 6.8 nH, the capacitance value of the first capacitor 121 is 22 pF, the capacitance value of the second capacitor 122 is 9 pF, the capacitance value of the third capacitor 151 is 1.5 pF, the capacitance value of the fourth capacitor 141 is 1.5 pF, the inductance value of the fourth inductor 142 is 3 nH, and the inductance value of the fifth inductor 143 is 2 nH.

[0080] In this embodiment, the first adaptation circuit 11 and the first filter circuit 12 of the first feed tap circuit k11, and the second adaptation circuit 15 and the second filter circuit 14 of the second feed tap circuit k12 can be formed by self-contained parameter components. In another embodiment, the first adaptation circuit 11 and the first filter circuit 12 of the first feed tap circuit k11, and the adaptation circuit 15 and the second filter circuit 14 of the second feed tap circuit k12 can alternatively be formed by integrated devices. In this way, the structural complexity of the antenna apparatus is reduced. Ranges that can be selected for the self-contained parameter element or for the integrated component are as follows: a capacitance value ranging from 0.3 pF to 100 pF, and an inductance value ranging from 0.5 nH to 100 nH.

[0081] Figure 1-5 is a schematic diagram of an area division of a radiator of an antenna apparatus in one implementation. In one implementation, the radiator 13 includes a first area B1, a second area B2, and a third area B3. The first area B1 and the third area B3 are arranged on opposite sides of the second area B2. The first feeder tap circuit k11 and the second feeder tap circuit k12 are electrically connected to the second area B2. Petition 870250000152, dated 02 / 01 / 2025, page 28 / 112 21 / 42

[0082] Specifically, the first area B1, the second area B2, and the third area B3 of radiator 13 extend sequentially, and the spacing between adjacent areas of the first area B1, the second area B2, and the third area B3 is equal, or there may be no spacing. The first feeder tap circuit k11 and the second feeder tap circuit k12 are electrically connected to the second area B2, so that a central feed structure is formed on the radiator 13 of the antenna apparatus. Thus, the radiator 13 may alternatively be of a symmetrical structure along the second area B2. The first feeder tap circuit k11 and the second feeder tap circuit k12 are symmetrical along the centerline A1, so that the centerline A1 passes through a center of the second area B2 of radiator 13.In this case, the antenna apparatus is generally symmetrical along the central line A1, and the structure is simple and easy to implement.

[0083] Figure 1-6 is a schematic diagram of the area division of the antenna apparatus radiator in another implementation. The structure in this implementation is basically the same as the structure shown in Figure 1-5, and one difference is that the first feeder tap circuit k11 and the second feeder tap circuit k12 are electrically connected to the first area B1.

[0084] Specifically, the first power supply tap circuit k11 and the second power supply tap circuit k12 are symmetrical along a first centerline A1, and the radiator 13 is symmetrical along a second centerline A2 of the second area B2. The first power supply tap circuit k11 and the second power supply tap circuit k12 are electrically connected to the first area B1, so that the first line Petition 870250000152, dated 02 / 01 / 2025, page 29 / 112 22 / 42 central A1 deviates from the second central line A2, and the first central line A1 and the second central line A2 are not collinear. Thus, a decentralized feed structure is formed in the antenna apparatus; specifically, the first feed tap circuit k11 and the second feed tap circuit k12 are displaced relative to the heatsink 13. This structure can be distant from a component location when arranged at the terminal, so the antenna apparatus layout is more flexible.

[0085] Radiator 12 may be in a ring shape. In this embodiment, radiator 13 is in a shape similar to a parallelogram. Specifically, still referring to Figure 1-1, radiator 13 includes a first segment 131, a second segment 132, a third segment 133, a fourth segment 134, and a fifth segment 135 that are successively connected to each other. The extension directions of the first segment 131 and the fifth segment 135 are the same, the extension directions of the first segment 131 and the third segment 133 are the same, and the extension directions of the second segment 132 and the fourth segment 134 are the same. The first segment 131 is electrically connected to the first filter circuit 12, and the fifth segment 135 is electrically connected to the second filter element 14.Furthermore, the extension direction of the first segment 131 is approximately perpendicular to the extension direction of the second segment 132, so that the radiator 13 is in a shape similar to a rectangle. In one embodiment, the first segment 131 and the fifth segment 135 are of equal length, and along a perpendicular line from a midpoint of the third segment 133, the first segment 131 and the fifth segment 135 are axisymmetric. In another embodiment, the length of the first segment 13 is not. Petition 870250000152, dated 02 / 01 / 2025, page 30 / 112 23 / 42 is equal to the length of the fifth segment 135, and the second segment 132 and the fourth segment 134 are axisymmetric along the perpendicular line from the midpoint of the third segment 133. According to the preceding arrangement, the antenna apparatus structure tends to be simplified, and the radiation performance can be better implemented.

[0086] An electrical length of the radiator 13 is related to a wavelength of a signal. Specifically, the length of the radiator 13 is a sum of the electrical lengths of the first segment 131, the second segment 132, the third segment 133, the fourth segment 134, and the fifth segment 135. When the first feed point 10 feeds the signal of the first frequency band or the second feed point 16 feeds the signal of the second frequency band, and the antenna apparatus reaches a matching condition, a wavelength of an electromagnetic wave signal that forms a resonance frequency in the radiator 13 is λ. Because the electrical length of the radiator 13 is determined, several resonance frequencies are generated in the radiator 13. Each of the different resonance frequencies during resonance is referred to as a resonance mode, and the antenna apparatus has several different resonance modes.

[0087] For example, six basic antenna resonance modes can be excited in frequency ranges from 0 GHz to 3 GHz, and are a 0.5λ resonance mode, a 0.5λ resonance mode generated by adaptation, a 1λ resonance mode, a 1.5λ resonance mode, a 2.0λ resonance mode, and a 2.5λ resonance mode, respectively. Figure 1-7 is a schematic diagram of S11 of the antenna apparatus presented in Figure 1-1. At a low frequency, a resonance frequency Petition 870250000152, dated 02 / 01 / 2025, page 31 / 112 The resonance frequency of the 0.5λ resonance mode is LB1, and the resonance frequency of the 0.5λ adaptation resonance mode is LB2; at an intermediate frequency, the resonance frequency of the 1λ resonance mode is MB1, and the resonance frequency of the 1.5λ resonance mode is MB2; at a high frequency, the resonance frequency of the 2.0λ resonance mode is HB1, and the resonance frequency of the 2.5λ resonance mode is HB2. The resonance frequencies LB1, LB2, MB1, MB2, HB1, and HB2 of the 0.5λ resonance mode, the 0.5λ resonance mode generated by adaptation, the 1λ resonance mode, the 1.5λ resonance mode, the 2.0λ resonance mode, and the 2.5λ resonance mode increase successively. Thus, a multifrequency antenna function is implemented.

[0088] Figures 1-8 to 1-13 are schematic diagrams of the basic current distribution of the six basic antenna resonances. Referring to Figure 1-8, the first filter circuit 12 and the first adaptation circuit 11 are omitted from the figure, and Figure 18 is a schematic diagram of the basic current distribution of the antenna apparatus in the 0.5λ resonance mode. The first feed mode 10 feeds the electromagnetic wave whose wavelength is λ to excite resonance generation in the radiator 103, and a wavelength corresponding to the electromagnetic wave during resonance is 0.5λ. When resonance is generated, a current in the radiator 103 flows inversely along a specific point. A current reversal point in the Figure means that: At a point on radiator 103, due to a mutual superposition effect of magnetic fields generated by the two reversing currents, the overall magnetic field distributed in a vertical direction is formed.A magnetic field distributed in a vertical direction has greater magnetic field strength and better field uniformity. Petition 870250000152, dated 02 / 01 / 2025, page 32 / 112 25 / 42 magnetic field than a field generated by a single bipolar antenna. In other words, when the current distribution of radiator 12 exhibits a current reversal characteristic at the current reversal point, the antenna apparatus is in a resonance condition. In the 0.5λ resonance mode, when radiator 13 is completely symmetrical, the current reversal point is approximately located at the midpoint of the third segment 113 of radiator 13, and a magnetic field generated in radiator 13 is symmetrical along the current reversal point. Certainly, in a real terminal product, radiator 13 is not completely symmetrical, or radiator 13 is not of a uniform size and has a different adaptation circuit, and in this case, the location of the current reversal point changes.

[0089] Figure 1-9 is a schematic diagram of the basic current distribution of the antenna apparatus in the 0.5λ resonance mode generated by the adapter. The first filter circuit 12 and the first adapter circuit 11 are omitted from the figure. The 0.5λ resonance mode generated by the adapter is similar to the 0.5λ resonance mode shown in Figure 1-8. However, a difference is that when an electromagnetic wave signal fed by the first feed point 10 excites the radiator 12, a delay effect of the electromagnetic wave signal is caused due to an input impedance characteristic of the antenna being altered by the tuning adapter, so that the location of the current inversion point is shifted, and a resonance frequency of the 0.5λ resonance mode is higher than a resonance frequency of the 0.5λ resonance mode.With reference to Figure 1-7, the LB1 frequency of the 0.5λ resonance mode is closest to 0.7 GHz in a horizontal coordinate, and the LB2 frequency of the resonance mode is... Petition 870250000152, dated 01 / 02 / 2025, p. 33 / 112 The 26 / 42 resonance frequency of 0.5λ generated by the adaptation is closer to 0.96 GHz in the horizontal coordinate, and is higher than the LB1 frequency of the resonance frequency of the 0.5λ resonance mode.

[0090] Figure 1-10 is a schematic diagram of the basic current distribution of the antenna apparatus in 1λ resonance mode. The second filter circuit 14 and the second adapter circuit 15 are omitted from the figure. The 1λ resonance mode is similar to the 0.5λ resonance mode shown in Figure 1-8. However, one difference is that the second feed point 16 feeds an electromagnetic wave signal whose wavelength is λ, a wavelength corresponding to the electromagnetic wave during resonance is 1λ, two current reversal points are generated when the radiator 13 is excited, and the two current reversal points are approximately located at midpoints of the second segment 112 and the fourth segment 114 of the radiator 13.With reference to Figure 1-7, the MB1 frequency of a 1λ resonance mode resonance frequency is closer to 1.7 GHz in the horizontal coordinate, and is greater than the LB2 frequency of the 0.5λ resonance mode resonance frequency generated by the adaptation.

[0091] Figure 1-11 is a schematic diagram of the basic current distribution of the antenna apparatus in the 1.5λ resonance mode. The second filter circuit 14 and the second adapter circuit 15 are omitted from the Figure. The 1.5λ resonance mode is similar to the 1λ resonance mode shown in Figure 1-10. However, one difference is that the second feed point 16b feeds the electromagnetic wave signal whose wavelength is λ, a wavelength corresponding to the electromagnetic wave during resonance is 1.5λ, three current reversal points are generated when the radiator 13 is excited, and the three reversal points Petition 870250000152, dated 01 / 02 / 2025, p. 34 / 112 27 / 42 of the current are approximately located at midpoints of the first segment 131, the third segment 113, and the fifth segment 135 of radiator 13. With reference to Figure 1-7, the MB2 frequency of a 1.5λ resonance mode resonance frequency is closer to 2.2 GHz in the horizontal coordinate, and is greater than the MB1 frequency of the 1λ resonance mode resonance frequency.

[0092] Figure 1-12 is a schematic diagram of the basic current distribution of the antenna apparatus in the 2.0λ resonance mode. The second filter circuit 14 and the second adapter circuit 15 are omitted from the figure. The 2.0λ resonance mode is similar to the 1λ resonance mode shown in Figure 1-10. However, one difference is that the second feed point 16 feeds the electromagnetic wave signal whose wavelength is λ, a wavelength corresponding to the electromagnetic wave during resonance is 2.0λ, four current reversal points are generated when the radiator 13 is excited, the four current reversal points are approximately located in the first segment 131, in the third segment 113, and in the fifth segment 135 of the radiator 13, and the extension lengths of the four current reversal points in the radiator 13 are approximately the same.With reference to Figure 1-7, the HB1 frequency of a 2.0λ resonance mode resonance frequency is closer to 2.7 GHz in the horizontal coordinate, and is greater than the MB2 frequency of the 1.5λ resonance mode resonance frequency.

[0093] Figure 1-13 is a schematic diagram of the basic current distribution of the antenna apparatus in the 2.5λ resonance mode. The second filter circuit 14 and the second adapter circuit 15 are omitted from the figure. The 2.5λ resonance mode is similar to Petition 870250000152, dated 01 / 02 / 2025, p. 35 / 112 28 / 42 resonance mode of 1λ shown in Figure 1-10. However, a difference is that the second feed point 16 feeds the electromagnetic wave signal whose wavelength is λ, a wavelength corresponding to the electromagnetic wave during resonance is 2.5λ, five current reversal points are generated when the radiator 13 is excited, the five current reversal points are approximately located in the first segment 131, in the second segment 112, in the third segment 113, in the fourth segment 114, and in the fifth segment 135 of the radiator 13, and the extension lengths of the five current reversal points in the radiator 13 are approximately the same. With reference to Figure 1-7, the frequency HB2 of a resonance frequency of the 2.5λ resonance mode is closer to 3 GHz in the horizontal coordinate, and is greater than the frequency HB1 of the resonance frequency of the 2.0λ resonance mode.

[0094] Figure 1-14 is a partial schematic structural diagram of a terminal in which the antenna apparatus in one implementation is disposed. The terminal includes a motherboard 01 and a mainboard 02. The mainboard 02 is arranged above the motherboard 01 in a stacked manner, and a USB interface 021 is disposed on one side of the mainboard 02. The first power tap circuit k11 and the second power tap circuit k12 of the antenna apparatus are disposed on the mainboard 021. In addition, the first power tap circuit k11 is disposed on the left side of the USB interface 021, and the second power tap circuit k12 is disposed on the right side of the USB interface 021. The antenna apparatus heatsink 13 is disposed on one side of the USB interface 021. Specifically, the first segment 131 is parallel to a plane in which the mainboard is located. The second segment 132 is approximately perpendicular to a Petition 870250000152, dated 01 / 02 / 2025, p. 36 / 112 29 / 42 extension direction of the first segment 131, and is approximately parallel to the plane in which the main plate 02 is located. The third segment 133 is approximately perpendicular to an extension direction of the second segment 132, the second segment 132 is connected to one end of the third segment 133, and the third segment 133 is approximately perpendicular to the plane in which the main plate 02 is located. The fourth segment 134 is approximately perpendicular to an extension direction of the third segment 133, and is approximately parallel to the plane in which the main plate 02 is located, and the fourth segment 134 is connected to the opposite end of the third segment 133.The fifth segment 135 is approximately perpendicular to an extension direction of the fourth segment 134, and is approximately parallel to the plane in which the main board 02 is located. The fifth segment 135 is located on the right side of the USB interface 021, and the fifth segment 135 and the first segment 131 are approximately located in the same plane. According to the arrangement, the antenna device is symmetrically arranged with respect to the USB interface 021, so that the structure is simple.

[0095] Referring to Figure 1-14 and Figure 1-15, Figure 1-15 is a schematic planar diagram of Figure 1-14. A first contact 1313 is electrically connected to the first power supply bypass circuit k11, and a second contact 1353 is electrically connected to the second power supply bypass circuit k12. The first segment 131 of the radiator 13 is electrically connected to the first contact 1313, and the fifth segment 135 is electrically connected to the second contact 1353. Specifically, the first segment 131 can be electrically connected to the first contact 1313 by using a first spring plate 1312, and the fifth segment 135 can Petition 870250000152, dated 02 / 01 / 2025, page 37 / 112 30 / 42 is electrically connected to the second contact 1353 by using a second spring plate 1352. Because the first segment 131 and the fifth segment 135 of the radiator 13 are higher than the plane on which the main plate 02 is located, the first spring plate 1312 and the second spring plate 1312 can be arranged to be perpendicular to the planes on which the main plate 02 is located. In this way, there is sufficient distance between the radiator 13 and each of the first power supply branch circuit k11 and the second power supply branch circuit k12, so that the radiation generated by the current flows of the first power supply branch circuit k11 and the second power supply branch circuit k12 on the main plate 02 does not interfere with a radiation characteristic of the radiator 13.

[0096] Because the USB interface 021 on the terminal needs to reserve space facing the outside of the terminal, a first through hole 1331 is arranged in a location that is on the third segment 133 of the radiator 13 and that corresponds to the USB interface 021. In addition, because a headphone, microphone interface, or other interface needs to be arranged, a second through hole 1332 is arranged on the third segment 133. To prevent a difference between the radiator characteristic of radiator 13 and the irradiation characteristic of a radiator 13 with a uniform structure from being too large, a first block 1311 is arranged on the first segment 131, and a second block 1351 is arranged on the fifth segment 135.The first block 1311 is equivalent to a projected block that is from the first segment 131 and is parallel to the plane in which the main plate 02 is located, and the second block 1351 is equivalent to a projected block that is from the fifth segment 135 and is parallel to the plane in which the main plate 02 is located. In addition, a projected block 1314 is electrically connected to the... Petition 870250000152, dated 02 / 01 / 2025, page 38 / 112 31 / 42 first block 1311, and the projected block 1314 is located in the same plane as the main plate 02. A radiation characteristic of the antenna apparatus can be adjusted by the arrangement of the first block 1311, the second frame 1353, and the projected block 1314.

[0097] Figure 1-16 is a partial schematic diagram of a terminal in which the antenna device in another implementation is arranged. Figure 1-17 is a schematic plan view of Figure 1-16. The structure of the antenna device arranged in the terminal in this implementation is basically the same as in the previous implementation. One difference is that the first power supply tap circuit k11 and the second power supply tap circuit k12 are arranged on the same side of the USB 021 interface. Because the terminal includes several components, to reserve space for another component, the first power supply tap circuit k11 and the second power supply tap circuit k12 are arranged on the same side of the USB 021 interface. In this way, the structure is more flexible.

[0098] Similar to the antenna device in the previous implementation, a block (number 1351 in Figure 4-2 and Figure 4-3 is used as an example) for adjustment is also arranged in the radiator 13 in this implementation, and the first through hole 1331 is also arranged in the third segment 133 to expose the USB interface 021. In addition, the second through hole 1332 can be arranged based on a specific terminal structure to expose another component such as a microphone interface.

[0099] In this configuration, the third segment 133 of the radiator 13 can be configured as a metal structure for the terminal. Additionally, the metal structure can be configured as a structure on one side of the USB interface. In this case, there is no other shielding. Petition 870250000152, dated 02 / 01 / 2025, page 39 / 112 32 / 42 of metal, so the antenna device does not need to consider free space. In another embodiment, the third segment 133 of the radiator 13 can alternatively be configured inside the terminal. In this case, a free space area needs to be left in the terminal to avoid metal shielding. For example, a way in which a terminal casing is configured as a non-metallic material, a way in which a metal terminal casing is slotted, and so on, can be used.

[00100] Figure 1-18 is a schematic diagram of S11 (input return loss) of the antenna apparatus in one implementation. There are six low points on the input return loss curves in the S11 figure, and the six low points correspond respectively to the resonance frequencies of six resonances. This indicates that in this embodiment of this application, the bandwidth of the antenna apparatus is wide enough, and the radiation characteristic meets a multifrequency requirement.

[00101] Figure 2-1 is a schematic structural diagram of an antenna apparatus according to a second embodiment of this application. Referring to Figure 2-1, the antenna apparatus is basically the same as an antenna apparatus in the first embodiment. However, one difference is that the antenna apparatus still includes a first switch 17 and at least one ground tap 171. The at least one ground tap 171 is connected in parallel between the first switch 17 and a ground. The first switch 17 is electrically connected to the radiator 13 and is arranged on a side of the radiator that is close to the second power tap circuit k12. The first switch 17 cooperates with the at least one ground tap 171 to exchange an electrical length of a signal from the first frequency band. In one implementation, there is one ground tap 171. In another implementation, there are at least Petition 870250000152, dated 02 / 01 / 2025, page 40 / 112 33 / 42 minus two derivations from ground 171.

[00102] Specifically, one end of the first switch 17 is electrically connected with a fifth segment 125 of the radiator 13, and the other end is grounded. Furthermore, an impedance component 172 is connected in series between at least one tap from ground 171 and ground. The impedance component 172 may include a resistor, an inductor, or a capacitor. For example, when the first switch 17 is in an off condition, the antenna apparatus in this mode is the same as the antenna apparatus in the first mode.When the first switch 17 is connected with an impedance component 172 with which an inductor is connected in series, due to the inductor having the characteristic of allowing a low-frequency signal to pass and blocking a high-frequency signal, a low-frequency signal that is from the first frequency band and that is fed by a first feed point 10 is directly grounded at the first switch 17, so that a physical electrical length of the radiator 13 of the antenna apparatus is shortened, to be specific, a part that is of the radiator 13 and that is configured to radiate a signal is left without a segment that is in the fifth segment 135 and that is from a point electrically connected with the first switch 17 to the second feed tap circuit k12. In this case, a frequency at which the signal of the first frequency band generates resonance moves towards a high frequency.When the first switch 17 is connected with a 0 ohm impedance component 172, in relation to which the first frequency band is directly grounded at the first switch 17, the physical electrical length of the radiator 13 is shortened, and the frequency at which the first frequency band generates resonance is the highest. The bandwidth of the first frequency band can be extended by the arrangement of the first switch 17. Petition 870250000152, dated 02 / 01 / 2025, page 41 / 112 34 / 42 of the ground derivation 171, and of the impedance component 172.

[00103] Figure 2-2 is a schematic diagram of S11 (input return loss) of the antenna device in this mode. When the first switch 17 is connected with different impedance components, it can be seen that a low resonant frequency obviously changes. Thus, the antenna device in this mode can implement multifrequency performance and can adjust the low resonant frequency.

[00104] Figure 3-1 is a schematic structural diagram of an antenna apparatus according to a third embodiment of this application. The antenna apparatus is basically the same as an antenna apparatus in the first embodiment. However, one difference is that the antenna apparatus further includes a radiation tap 20, a second switch 18, a first ground tap 181, and at least one second ground tap 182. The first ground tap 181 is connected in series between the second switch 18 and the second feeder tap circuit k12. At least one second ground tap 182 is connected in parallel between the second switch 18 and a ground. The radiation tap 18 is electrically connected with one end that is from the second feeder tap circuit k12 and that is connected to the first ground tap 181. There may be a second ground tap 181, or there may be at least two second ground taps 181.

[00105] Specifically, one end of the second switch 18 is electrically connected to a fifth segment 135 of a radiator 13. Impedance components 183 can be electrically connected to the first ground tap 181 and to at least one second ground tap 182, respectively. Impedance component 183 may include a resistor, an inductor, Petition 870250000152, dated 02 / 01 / 2025, page 42 / 112 35 / 42 or a capacitor. The first tap from ground 181 is electrically connected to a second filter circuit 14 of the second power tap circuit k12 by using an impedance component 183. At least one second tap from ground 182 is electrically connected to ground by using another impedance component 183. A function of impedance component 183 is to adjust a physical electrical length of the radiator 13.

[00106] One operating principle of the antenna apparatus in this mode is as follows: When the second switch 18 is connected to the first ground tap 181, a signal that is from the first frequency band and that is fed by a first feed tap circuit k11 is radiated on the radiator 13, and then is grounded in the second filter circuit 14; and a signal that is from a second frequency band and that is fed by the second feed tap circuit k12 is radiated on the radiator 13 and by the radiation tap 20, and then some signals on the radiator 13 are grounded in a first filter circuit 12. In this case, compared with the first mode, a radiation characteristic of the signal from the second frequency band changes.When the second switch 18 is connected to and grounded at the second ground tap 182, this is equivalent to a circuit between the radiator 13 and the second power supply tap circuit k12 being interrupted, and the signal that is from the first frequency band and that is fed by the first power supply tap circuit k11 is radiated on the radiator 13, and then is grounded at the second switch 18 by using the second ground tap; and the signal that is from the second frequency band and that is fed by the second power supply tap circuit k12 is radiated on the radiation tap 20.

[00107] In accordance with the preceding provision, the second key Petition 870250000152, dated 02 / 01 / 2025, page 43 / 112 36 / 42 cooperates with the first derivation of ground 181 or with at least one second derivation of ground 182, so that various operating modes of the antenna apparatus can be implemented. In this way, the antenna apparatus has multifrequency performance, and the resonance frequencies of a high-frequency signal and a low-frequency signal can be adjusted.

[00108] In one implementation, the radiating lead 20 is arranged to be separate from the radiator 13, and the physical electrical length of the radiating lead 20 is shorter than the physical electrical length of the radiator 13. Specifically, a frequency in the first frequency band is lower than a frequency in the second frequency band. The radiating lead 20 is configured to radiate a signal with a resonant frequency in the second frequency band, and a higher frequency indicates a shorter wavelength, requiring a shorter physical antenna length. The radiator 13 is configured to radiate not only the signal whose resonant frequency is in the second frequency band, but also a signal whose resonant frequency is in the first frequency band.Therefore, the physical electrical length of the radiation tap 20 is arranged to be shorter than the physical electrical length of the radiator 13, so that a requirement to radiate the signal of the second frequency band can be met. To avoid mutual radiation interference, the radiation tap 20 needs to be separated from the radiator 13 by a specific distance, to ensure sufficient antenna isolation.

[00109] Figure 4-1 is a schematic diagram of a circuit structure of an antenna apparatus according to a fourth embodiment of this application. The first supply tap circuit k11 includes a first capacitor 114, a second capacitor 116, a third capacitor 126, a first inductor 115, a Petition 870250000152, dated 02 / 01 / 2025, page 44 / 112 37 / 42 second inductor 117, a third inductor 124, and a fourth inductor 125. The second capacitor 116 is connected in series between the second power supply point 10 and ground. The second inductor 117 is connected in series between ground and one end of the second capacitor 116 that is distant from ground. The first capacitor 114, the first inductor 115, and the third inductor 124 are successively connected in series between ground and one end of the second inductor 117 that is distant from ground. The fourth inductor 125 and the third inductor 126 are successively connected in series between ground and one end of the third capacitor 124 that is distant from ground. The heat sink 13 is electrically connected to one end of the fourth inductor 125 that is distant from ground.The first capacitor 114, the second capacitor 116, the first inductor 115 and the second inductor 117 form the first adapter circuit 11, and the third capacitor 126, the third inductor 124, and the fourth inductor 125 form the first filter circuit 12.

[00110] In addition, the second power supply bypass circuit k12 includes a fourth capacitor 152, a fifth capacitor 145, a fifth inductor 153, a sixth inductor 144, and a seventh inductor 146. The fifth inductor 153 is connected in series between the second power supply point 16 and ground. The fourth capacitor 152, the fifth capacitor 145, and the seventh inductor 146 are successively connected in series between ground and one end of the fifth inductor 153 that is distant from ground. The sixth inductor 144 is connected in parallel with two ends of the fifth capacitor 145. The heat sink 13 is electrically connected with one end of the seventh inductor 146 that is distant from ground. The fourth capacitor 152 and the fifth inductor 153 form a second adaptor circuit 15, and the fifth capacitor 145, the sixth inductor 144, and the seventh inductor 146 form the second filter circuit 14. Petition 870250000152, dated 02 / 01 / 2025, page 45 / 112 38 / 42

[00111] One principle of the circuit in Figure 4-1 is as follows: Because an alternating current signal has a magnitude-phase characteristic, and a capacitor and an inductor have different frequency response characteristics at different frequencies, the frequency of a current signal that is in a first frequency range and is fed by the first power supply point 10 is lower than the frequency of a current signal that is in a second frequency range and is fed by the second power supply point 16. The first capacitor 113 and the first inductor 114 allow the signal that is in the first frequency range and whose frequency is lower to pass through, and after resonance is generated in the heat sink 13, the current signal is grounded at the seventh inductor 146 because the sixth inductor 144 and the fifth capacitor 145, which are connected in parallel, block a low-frequency signal and an intermediate-frequency signal.The second power supply point 16 feeds the current signal from the second frequency band. The fourth capacitor 152 allows the signal from the second frequency band, which has a higher frequency, to pass through. In the sixth inductor 144 and the fifth capacitor 145, which are connected in parallel, a high-frequency portion of the current signal passes through the sixth inductor 144, and a super-high-frequency portion passes through the fifth capacitor 145. After resonance is generated in the heat sink 13, the current signal is altered in the first filter circuit 12 or the first adapter circuit 11.To adjust the impedance combination of the antenna, the pass capacitors and pass inductors of the second capacitor 116, the second inductor 117, the third inductor 124, the fourth inductor 125, the third capacitor 26, the fifth inductor 153, and the seventh inductor 146, which are grounded, need to be arranged in order to adjust the impedance combination of the antenna apparatus to an ideal condition. Petition 870250000152, dated 02 / 01 / 2025, page 46 / 112 39 / 42

[00112] The sixth inductor 144 and the fifth capacitor 145, which are connected in parallel, are equivalent to a band-stop filter component added to the second filter 14, so that a resonance frequency of the antenna apparatus includes a low-frequency part and an intermediate-frequency part. This is equivalent to the fact that a low-frequency signal from a first frequency band and an intermediate-frequency signal from a second frequency band of an antenna apparatus in the first mode cannot pass, and in the second frequency band, a high-frequency part is further separated from a super-high-frequency part. Therefore, the bandwidth of the antenna is extended.

[00113] Specific values ​​for each capacitor and each inductor in Figure 4-1 are not limited in this application. However, for better understanding, a preferred implementation is provided. As shown in Figure 4-1, the capacitance value of the first capacitor 112 is 2.2 pF, the inductance value of the first inductor 115 is 6.8 nH, the capacitance value of the second capacitor 116 is 2.5 pF, the inductance value of the second inductor 117 is 5.3 nH, the inductance value of the third inductor 124 is 5 nH, the inductance value of the fourth inductor 125 is 6 nH, the capacitance value of the third capacitor 126 is 0.65 pF, the capacitance value of the fourth capacitor 152 is 1.8 pF, the inductance value of the fifth inductor 153 is 0.8 nH, the inductance value of the sixth inductor 144 is 2.5 nH, the capacitance value of the fifth capacitor 145 is 3.3 pF, and the inductance value of the The seventh inductor, 146, is 2.7 nH.

[00114] Figure 4-2 is a schematic diagram of S11 (input return loss) of the antenna apparatus shown in Figure 4-1. It can be seen that the antenna apparatus includes two low resonant frequencies, two intermediate resonant frequencies, one high resonant frequency, and one super high frequency. Petition 870250000152, dated 01 / 02 / 2025, p. 47 / 112 40 / 42 resonance frequency. Thus, the performance of the device meets a multi-frequency requirement.

[00115] Figure 5-1 is a schematic diagram of a circuit structure of an antenna apparatus according to a fifth embodiment of this application. The antenna apparatus is basically the same as an antenna apparatus in the first embodiment. However, one difference is that a duplexer 19 is provided. The duplexer 19 includes an input port 191, a first output port 192, and a second output port 193. The first output port 192 is configured as the first feed point 10, and the second output port 193 is configured as the second feed point 16. The first filter circuit 12 is electrically connected to the first output port 192, the second filter circuit 14 is electrically connected to the second output port 193. The antenna apparatus also includes a general feed point 30. The general feed point 30 is electrically connected to the input port 191.

[00116] Specifically, a function of duplexer 19 is to classify signals fed by the general power supply point 30 into two signal paths that are isolated from each other, to be specific, a signal that is of a first frequency range and that is emitted by the first output port 192 and a signal that is of a second frequency range and that is emitted by the second output port 192. In other words, duplexer 19 is arranged so that functions of a first power supply point 10 and a second power supply point 16 in the first mode can be implemented by arranging only the general power supply point 30. In this way, a number of power supply points is reduced. This facilitates a component space design within a terminal.

[00117] It can be learned from the preceding description that Petition 870250000152, dated 02 / 01 / 2025, page 48 / 112 41 / 42 in this embodiment, a first power supply bypass circuit k11 includes the first output port 192, the first adapter circuit 11, and the first filter circuit 12, and a second power supply bypass circuit k12 includes the second output port 193, a second adapter circuit 15, and the second filter circuit 14.

[00118] The circuit structure in this embodiment is the same as a circuit structure in the first embodiment, and details are not described again in this document.

[00119] An implementation of electrically connecting the first power supply branch circuit k11 with a heatsink 13 is basically the same as an implementation of electrically connecting a first power supply branch circuit k11 and a second power supply branch circuit k12 with the first area B1 in the first embodiment. In this embodiment, the length of a first segment 441 is short, and the length of a fifth segment 445 is long, so that a decentralized power supply structure is formed on the heatsink 44. According to the arrangement, the first power supply branch circuit k11 and the second power supply branch circuit k12 can be distant from a location where another component is arranged on the terminal. This facilitates a layout of the terminal components.

[00120] Certainly, the first power supply bypass circuit k11 and the second power supply bypass circuit k12 can be electrically connected with the radiator 13 in this mode by alternatively using an implementation of electrically connecting the first power supply bypass circuit k11 and the second power supply bypass circuit k12 with the second area B2.

[00121] Figure 5-2 is a schematic diagram of S11 (input return loss) of an antenna apparatus shown in Figure Petition 870250000152, dated 02 / 01 / 2025, page 49 / 112 42 / 42 5-1. It can be seen that there are two low resonance frequencies and four intermediate and high frequencies. In this way, multifrequency performance of the antenna device is obtained.

[00122] The antenna apparatus and terminal provided in the embodiments of this application are described in detail above. The principle and implementation of this application are described in this document by means of specific examples. The description of the embodiments of this application is merely provided to aid in understanding the method and main ideas of this application. In addition, those skilled in the art may make variations and modifications to this application in terms of specific implementations and scopes of the application in accordance with the ideas of this application. Therefore, the content of the descriptive report should not be construed as a limitation for this application. Petition 870250000152, dated 01 / 02 / 2025, p. 50 / 112

Claims

1 / 6 CLAIMS 1. Antenna apparatus, comprising a first feed tap circuit (k11), a second feed tap circuit (k12), and a radiator (13) connected between the first feed tap circuit (k11) and the second feed tap circuit (k12), characterized in that the first feed tap circuit (k11) comprises a first feed point (10) and a first filter circuit (12) electrically connected between the first feed point (10) and the radiator (13), and the first feed point (10) is configured to feed a signal of a first frequency band;the second power supply bypass circuit (k12) comprises a second power supply point (16) and a second filter circuit (14) electrically connected between the second power supply point (16) and the radiator (13), and the second power supply point (16) is configured to supply a signal of a second frequency band; the first filter circuit (12) is configured to: allow the signal of the first frequency band to pass, and ground the signal of the second frequency band; and the second filter circuit (14) is configured to: allow the signal of the second frequency band to pass, and ground the signal of the first frequency band;still comprising a duplexer (19), wherein the duplexer comprises an input port (191), a first output port (192), and a second output port (193), the first output port (192) is configured as the first feed point (10), the second output port (193) is configured as the second feed point (16), the first filter circuit (12) is electrically connected with the first output port (192), the second filter circuit (14) is electrically connected with the second output port (193), and the antenna apparatus further comprises a general feed point, wherein the general feed point is electrically connected with the input port (191).

2. Antenna apparatus, according to claim 1, characterized in that the first feed tapping circuit (k11) further comprises a first adaptation circuit (11) electrically connected between the first feed point (10) and the first filter circuit (12), configured to adjust a resonance frequency of the signal from the first frequency band; and the second feed tapping circuit (k12) further comprises a second adaptation circuit (15) electrically connected between the second feed point (16) and the second filter circuit (14), configured to adjust a resonance frequency of the signal from the second frequency band.

3. Antenna apparatus, according to claim 2, characterized in that the first feed tap circuit (k11) and the second feed tap circuit (k12) are symmetrically arranged on both sides of a central line (A1), and the radiator (13) has a symmetrically distributed architecture along the central line.

4. Antenna apparatus, according to claim 2, characterized in that the first feed tap circuit (k11) comprises a first inductor (111), a second inductor (112), a third inductor (113), a first capacitor (121), and a second capacitor (122), wherein the second inductor (112) is connected in series between the first feed point (10) and a ground, the first inductor (111) and the third inductor (113) are Petition 870250000152, dated 02 / 01 / 2025, page.52 / 112 3 / 6 successively connected in series between ground and one end which is of the second inductor (112) and which is distant from ground, the first capacitor (121) and the second capacitor (122) are successively connected in series between ground and one end which is of the third inductor (113) and which is distant from ground, the radiator (13) is electrically connected with one end which is of the second capacitor (122) and which is distant from ground, the first inductor (111), the second inductor (112), and the third inductor (113) form the first adaptation circuit (11), and the first capacitor (121) and the second capacitor (122) form the first filter circuit (12).

5. Antenna apparatus, according to claim 4, characterized in that the second feed bypass circuit (k12) comprises a third capacitor (151), a fourth capacitor (141), a fourth inductor (142), and a fifth inductor (143), wherein the third capacitor (151) is connected in series between the second feed point (16) and ground, the fourth inductor (142) is connected in series between ground and an end of the third capacitor (151) that is distant from ground, the fourth capacitor (141) and the fifth inductor (143) are successively connected in series between ground and an end of the fourth inductor (142) that is distant from ground, the third capacitor (151) forms the second adapter circuit, and the fourth inductor (142), the fourth capacitor (141) and the fifth inductor (143) form the second filter circuit (14).

6. Antenna apparatus, according to claim 1, characterized in that the radiator (13) comprises a first area (B1), a second area (B2), and a third area (B3), wherein the first area (B1) and the third area (B3) are arranged on two opposite sides of the second area (B2), and the first feeder tap circuit (k11) and the second feeder tap circuit (k12) are electrically connected with the first area Petition 870250000152, dated 02 / 01 / 2025, page 53 / 112 4 / 6 (B1).

7. Antenna apparatus, according to claim 6, characterized in that the first feed tap circuit (k11) and the second feed tap circuit (k12) are symmetrically distributed on two sides of a first center line (A1), the radiator (13) has a symmetrically distributed architecture along a second center line (A2), and the first center line (A1) deviates from the second center line (A2).

8. Antenna apparatus, according to any one of claims 1 to 7, characterized in that the antenna apparatus further comprises a first switch (17) and at least one ground tap (171), wherein the at least one ground tap (171) is connected in parallel between the first switch (17) and ground, the first switch (17) is electrically connected with the radiator (13) and is disposed on a side of the radiator (13) that is close to the second power tap circuit (k12), and the first switch (17) cooperates with the at least ground tap (171) to exchange an electrical length of the signal of the first frequency band.

9. Antenna apparatus, according to claim 8, characterized in that an impedance component (172) is disposed in each tap from the earth (171), to adjust an electrical length of the radiator (13).

10. Antenna apparatus, according to any one of claims 1 to 7, characterized in that the antenna apparatus further comprises a radiation tap (20), a second switch (18), a first ground tap (181), and at least one second ground tap (182), wherein the first ground tap (181) is connected in series between the second switch (18) and the second filter circuit (14), at least one second ground tap (182) is connected in parallel between the second switch (18) and ground, and the radiation tap (20) is electrically connected with one end that is from the second filter circuit (14) and that is connected with the first ground tap (181).

11. Antenna apparatus, according to claim 10, characterized in that the radiating tap (20) is arranged to be separated from the radiator (13), and an electrical length of the radiating tap (20) is less than the electrical length of the radiator (13).

12. Antenna apparatus, according to claim 2, characterized in that the first power supply bypass circuit (k11) comprises a first capacitor (114), a second capacitor (116), a third capacitor (126), a first inductor (115), a second inductor (117), a third inductor (124), and a fourth inductor (125), wherein the second capacitor (116) is connected in series between the first power supply point (10) and a ground, the second inductor (117) is connected in series between the ground and an end of the second capacitor (116) that is distant from the ground, the first capacitor (114), the first inductor (115), and the third inductor (124) are successively connected in series between the ground and an end of the second inductor (117) that is distant from the ground, the fourth inductor (125) and the third capacitor (126) are successively connected in series between the ground and one end that is from the third inductor (124) and that is distant from the ground,and the radiator (13) is electrically connected with one end that is from the fourth inductor (125) and that is distant from the ground, the first capacitor (114), the second capacitor (116), the first inductor (115), and the second inductor (117) form the first adaptation circuit (11), and the third capacitor (126), the third inductor (124), and the fourth inductor (125) form the first filter circuit (12). Petition 870250000152, dated 02 / 01 / 2025, page 55 / 112 6 / 6, 13. Antenna apparatus, according to claim 12, characterized in that the second power supply bypass circuit (k12) comprises a fourth capacitor (152), a fifth capacitor (145), a fifth inductor (153), a sixth inductor (144), and a seventh inductor (146), wherein the fifth inductor (153) is connected in series between the second power supply point (16) and ground, the fourth capacitor (152), the fifth capacitor (145), and the seventh inductor (146) are successively connected in series between ground and one end of the fifth inductor (153) that is distant from ground, the sixth inductor (144) is connected in parallel with two ends of the fifth capacitor (145), the radiator (13) is electrically connected with one end of the seventh inductor (146) that is distant from ground, the fourth capacitor (152) and the fifth inductor (153) form the second circuit. adaptation, and the fifth capacitor (145), the sixth inductor (144),and the seventh inductor (146) form the second filter circuit (14)., 14. Antenna apparatus, according to any one of claims 1 to 13, characterized in that the antenna apparatus is arranged in a terminal, the first feed tap circuit (k11) and the second feed tap circuit (k12) of the antenna apparatus are arranged in a terminal motherboard (02).

15. Antenna apparatus, according to claim 14, characterized in that the terminal comprises a metallic structure, wherein at least part of a radiator (13) of the antenna apparatus is configured as the metallic structure, and the first feed tap circuit (k11) and the second feed tap circuit (k12) are each electrically connected to the metallic structure. Petition 870250000152, dated 02 / 01 / 2025, p. 56 / 112

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