Antennas and Communication Devices

Abstract

The embodiment of the present application provides an antenna and a communication device. The antenna includes a first radiator, a second radiator, a first feed, a first feeder, and a second feeder. The first feed is configured to connect to a radio frequency front end, and the first feed is electrically connected to the first radiator through the first feeder and electrically connected to the second radiator through the second feeder. When the antenna is in a first operation mode, the first feed supplies a radio frequency signal to the first radiator and the second radiator, and the first radiator and the second radiator receive radio frequency signals having the same phase, and the first radiator and the second radiator are coupled to each other, and a single resonance is generated. The antenna shown in the embodiment of the present application can obtain a low SAR value that has little effect on the human body.

Description

[Technical field]

[0002] The present application relates to the field of communications technologies, and in particular to antennas and communication devices. [Background technology]

[0003] 2. Description of the Related Art With the rapid development of wireless communication technology, people become more and more dependent on communication devices. General When a receiving device is close to the human body, the specific absorption rate (SAR) of the antenna's electromagnetic radiation It is essential that they are restricted in accordance with the corresponding regulations. Summary of the Invention [Means for solving the problem]

[0004] According to a first aspect, the present application provides an antenna including a first radiator, a second radiator, a first feed, a first feeder, and a second feeder, the first feed being configured to connect to a radio frequency front end, the first feed being electrically connected to the first radiator via the first feeder and electrically connected to the second radiator via the second feeder.

[0005] When the antenna is in the first operating mode, the first feed supplies radio frequency signals to the first radiator and the second radiator, and the first radiator and the second radiator receive radio frequency signals with the same phase, and the first radiator and the second radiator are coupled to each other and a single resonance is generated. In this case, the current near the first radiator and the second radiator is evenly distributed, and the first radiator and the second radiator can be fully excited. This helps to reduce the SAR value of the antenna, and improves the antenna efficiency and the beside-head-and-hand performance of the antenna.

[0006] In one embodiment, the antenna further includes a switch disposed on the second feeder and connected between the first feed and the second radiator.

[0007] When the switch is turned on, the antenna is in a first mode of operation.

[0008] When the switch is turned off, the antenna is in the second operating mode, the first feed supplies a radio frequency signal to the first radiator, which is coupled to the second radiator and excites the second radiator. In this case, the second radiator is used as a parasitic radiator for the first radiator, and the current near the first radiator is strong and the current near the second radiator is weak, i.e. the current near the first radiator and the second radiator is unevenly distributed.

[0009] By controlling the switch to be off or on, the first radiator can be excited separately, or the first radiator and the second radiator can be excited simultaneously, controlling the switching between the first and second operation modes of the antenna, and the current distribution situation of the current near the first radiator and the second radiator can be further modified, which helps to improve the antenna efficiency and the beside head-and-hand performance of the antenna, and optimize the specific absorption rate characteristics of the antenna.

[0010] In one embodiment, the antenna further includes a plurality of phase shifters arranged in parallel on the second feeder and connected between the switch and the second radiator, the phase adjustment values ​​of the plurality of phase shifters being different, and the switch being switchably connected to the different phase shifters to adjust the phase of the radio frequency signal provided by the first feed to the second radiator.

[0011] By controlling the switching of the switch, a phase shifter with a different phase adjustment value can be connected to the second feeder to adjust the phase difference between the radio frequency signals supplied by the first feed to the first radiator and the second radiator, and control the switching of the operation mode of the antenna, which helps to improve the antenna efficiency and the beside-head-and-hand performance of the antenna, and optimize the specific absorption rate characteristics of the antenna.

[0012] In one embodiment, there are three phase shifters, one of which has a phase adjustment value of 0 degrees, one of which has a phase adjustment value of 90 degrees, and one of which has a phase adjustment value of 180 degrees.

[0013] In one embodiment, the antenna further includes a phase shifter disposed on the second feeder and connected between the switch and the second radiator.

[0014] When the switch is turned on, the phase adjuster adjusts the phase of the radio frequency signal supplied by the first feed to the second radiator.

[0015] By controlling the switch to be off or on, a phase adjuster may be connected to the second feeder to adjust the phase difference between the radio frequency signals supplied by the first feed to the first radiator and the second radiator, and control the switching of the antenna's operating mode, which helps to improve the antenna efficiency and the beside-head-and-hand performance of the antenna, and optimize the specific absorption rate characteristics of the antenna.

[0016] In one embodiment, the first feed is a full-band feed, specifically, the first feed is a feed covering three bands: mid-band, mid-band, and high-band.

[0017] In one embodiment, the first feed is a mid-high band feed, and the antenna further includes a second feed and a third feeder, the second feed configured to connect to the radio frequency front end, the second feed electrically connected to the second radiator via the third feeder, and the second feed is a low band feed.

[0018] It should be understood that the mid- and high-band radio frequency signals have a significant effect on the SAR value of the antenna. The antenna is powered such that the mid- and high-band signals and the low-band signals are fed separately. This is more conducive to tuning the mid- and high-band radio frequency signals and optimizing the specific absorption rate characteristics of the antenna.

[0019] In one embodiment, the antenna further includes a first filter and a second filter, the first filter being disposed on the second feeder and connected between the first feed and the second radiator to filter low-band radio frequency signals, and the second filter being disposed on the third feeder and connected between the second feed and the second radiator to filter mid- and high-band radio frequency signals.

[0020] In one embodiment, the antenna further includes a first tuning circuit, one end of which is grounded and the other end of which is connected to the first radiator, the first tuning circuit being configured to adjust the electrical length of the first radiator to change the resonant frequency of the first radiator, so that the first radiator can switch between different operating bands based on actual requirements, and the antenna can cover different operating bands.

[0021] In one embodiment, the first tuning circuit includes a plurality of different first tuning elements and a first changeover switch. The plurality of different first tuning elements are all connected to the first radiator. One end of the first changeover switch is grounded and the other end is switchably connected to the different first tuning elements. The different first tuning elements are connected to the first radiator to adjust the electrical length of the first radiator.

[0022] The first tuning element is a tuning element such as a capacitor, an inductor, or a resistor.

[0023] In one embodiment, the antenna further includes a second tuning circuit, one end of which is grounded and the other end of which is connected to the second radiator. The second tuning circuit is configured to adjust the electrical length of the second radiator to change the resonant frequency of the second radiator, so that the second radiator can switch between different operating bands based on actual requirements, and the antenna can cover different operating bands.

[0024] In one embodiment, the second tuning circuit includes a plurality of different second tuning elements and a second changeover switch. The plurality of different second tuning elements are all connected to the second radiator. One end of the second changeover switch is grounded and the other end is switchably connected to the different second tuning elements. The different second tuning elements are connected to the second radiator to adjust the electrical length of the second radiator.

[0025] The second tuning element is a tuning element such as a capacitor, an inductor, or a resistor.

[0026] According to a second aspect, the present application provides a communications device including a radio frequency front end and any one of the antennas described above, the radio frequency front end being connected to the first feed and configured to provide a radio frequency signal to the antenna and / or receive a radio frequency signal received by the antenna.

[0027] In the communication device shown in the present application, when the antenna is in a first operating mode, the first feed supplies radio frequency signals to the first radiator and the second radiator, and the first radiator and the second radiator receive radio frequency signals having the same phase, and the first radiator and the second radiator are coupled to each other, and a single resonance is generated. In this case, the current near the first radiator and the second radiator is evenly distributed, and the first radiator and the second radiator can be fully excited. This reduces the SAR value of the antenna, improves the antenna efficiency and the beside-head-and-hand performance of the antenna, thereby improving the antenna performance of the communication device, improving the wireless performance in the user's actual usage scenario, and helping to improve the user's usage experience.

[0028] In one embodiment, the communication device includes a frame. The frame includes a first metal segment and a second metal segment spaced apart from each other. The first metal segment forms a first radiator, and the second metal segment forms a second radiator. In other words, a portion of the frame can be used as the first radiator and the second radiator of the antenna, so that the space occupied by the antenna in the communication device can be reduced.

[0029] In one embodiment, the communication device includes a frame, the frame being made of a non-metallic material, the first radiator and the second radiator being spaced apart from each other and both positioned relative to the frame, such that a space occupied by the antenna within the communication device is reduced.

[0030] In order to more clearly describe the technical solutions in the embodiments or background art of the present application, the following describes the accompanying drawings for illustrating the embodiments or background art of the present application. [Brief description of the drawings]

[0031] [Figure 1] 1 is a schematic diagram of the structure of a communication device according to an embodiment of the present application; [Diagram 2] FIG. 2 is a schematic diagram of a partial structure of the communication device shown in FIG. [Diagram 3] FIG. 2 is a second schematic diagram of a partial structure of a communication device according to an embodiment of the present application. [Figure 4] FIG. 4 is a third schematic diagram of a partial structure of a communication device according to an embodiment of the present application. [Diagram 5] FIG. 4 is a fourth schematic diagram of a partial structure of a communication device according to an embodiment of the present application. [Figure 6] FIG. 5 is a fifth schematic diagram of a partial structure of a communication device according to an embodiment of the present application. [Figure 7] 7A-7C are diagrams of the return loss coefficient curve of the antenna in a free state and the efficiency curves of the antenna in different states obtained when the third switch of the communication device shown in FIG. 6 is turned off. [Figure 8] 7 is a schematic diagram of the current distribution obtained when the third switch of the communication device shown in FIG. 6 is turned off. [Figure 9] 7A-7C are diagrams of the return loss coefficient curve of the antenna in a free state and the efficiency curves of the antenna in different states obtained when the first single-pole single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 10] FIG. 7 illustrates the current distribution at 2.2 GHz obtained when the first single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 11] 7 is an antenna radiation pattern at 2.2 GHz obtained when the first single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 12] 7 is a diagram of the return loss coefficient curve and the efficiency curve of the antenna in the free state obtained when the second single-pole single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 13] FIG. 7 illustrates the current distribution at 1.8 GHz obtained when the second single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 14]FIG. 7 illustrates the current distribution at 2.55 GHz obtained when the second single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 15] 7 is an antenna radiation pattern at 1.8 GHz obtained when the second single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 16] 7 is an antenna radiation pattern at 2.55 GHz obtained when the second single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 17] 7A-7C are diagrams of the return loss coefficient curve of the antenna in a free state and the efficiency curves of the antenna in different states obtained when the third single-pole single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 18] FIG. 7 illustrates the current distribution at 1.9 GHz obtained when the third single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 19] 7 is an antenna radiation pattern at 1.9 GHz obtained when the third single-pole, single-throw switch of the communication device shown in FIG. 6 is turned on. [Figure 20] A sixth schematic diagram of a partial structure of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] The following describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings. Certainly explain.

[0033] FIG. 1 is a schematic diagram of the structure of a communication device 1000 according to an embodiment of the present application.

[0034] The communication device 1000 may be an electronic product having a wireless communication function, such as a handheld device, an in-vehicle device, a wearable device, a computer device, a wireless local area network (WLAN) device, or a router, etc. In some application scenarios, the communication device 1000 may alternatively have different names, such as a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile console, a remote station, a remote terminal, a mobile device, a user terminal, a wireless communication device 1000, a user agent or user equipment, a mobile phone, a wireless telephone, a session initiation protocol (SIP) telephone, a wireless local loop (WLL) station, and a personal digital assistant (PDA), a terminal device of a 5G network or a future evolution network, etc. In the embodiment of the present application, an example in which the communication device 1000 is a mobile phone is used for explanation.

[0035] The communication device 1000 includes a housing 100, a display 200, a receiver (not shown), a speaker 300, a connector 400, and a card tray 500. The display 200 is attached to the housing 100. The receiver, the speaker 300, the connector 400, and the card tray 500 are all attached inside the housing 100.

[0036] The housing 100 may include a frame 110 and a rear cover 120. The rear cover 120 is fastened to one side of the frame 110. The frame 110 and the rear cover 120 may be an integrally formed structure to ensure the structural stability of the housing 100. Alternatively, the frame 110 and the rear cover 120 may be fastened to each other by assembly.

[0037] The frame 110 includes a left frame 110a and a right frame 110b arranged opposite each other, and an upper frame 110c and a lower frame 110d connected between the left frame 110a and the right frame 110b. The left frame 110a, the lower frame 110a, the right frame 110b, and the upper frame 110c are connected head-to-tail to form a rectangular frame 110. In addition, the frame 110 may be provided with a chamfered portion to improve the aesthetic appearance of the frame 110 and improve the aesthetic appearance of the communication device 1000.

[0038] The housing 100 is provided with a speaker hole 1001, an insertion hole 1002, and a mounting hole 1003. In this embodiment, the speaker hole 1001, the insertion hole 1002, and the mounting hole 1003 are all provided in the frame 110. Specifically, the speaker hole 1001, the insertion hole 1002, and the mounting hole 1003 are all provided in the lower frame 110d. There may be one or more speaker holes 1001. For example, there are multiple speaker holes 1001, and each speaker hole 1001 connects the inside of the housing 100 to the outside of the housing 100. The insertion hole 1002 and the speaker hole 1001 are spaced apart from each other. The mounting hole 1003 is located on the side of the insertion hole 1002 that is far from the speaker hole 1001, and is spaced apart from the insertion hole 1002. Both the plug hole 1002 and the mounting hole 1003 connect the inside and outside of the housing 100. It should be noted that the "hole" described in the embodiments of the present application is a hole having a complete hole wall, and the following description of the "hole" will be understood similarly.

[0039] It should be noted that the directional terms such as "left", "right", "up" and "down" used to describe the communication device 1000 in the embodiments of the present application are mainly described based on the direction in which the user holds and uses the communication device 1000. When the user holds and uses the communication device 1000, the upward orientation is "up", the downward orientation is "down", the left orientation is "left", and the right orientation is "right". This is not intended to indicate or imply that the described apparatus or element has a specific orientation or needs to be configured and operated in a specific orientation, and therefore cannot be understood as a restriction on the orientation of the communication device 1000 in an actual application scenario.

[0040] The display 200 is fastened to the other side of the frame 110 and configured to display images, videos, etc. In other words, the display 200 and the rear cover 120 are fastened to both sides of the frame 110, respectively. When a user holds and uses the communication device 1000, the display 200 is disposed toward the user, and the rear cover 120 is disposed away from the user. The display 200 is provided with a receiver hole 2001, which is a through hole penetrating the display 200.

[0041] In some other embodiments, the receiver hole 2001 may be formed between the edge of the display 200 and the housing 100. For example, the receiver hole 2001 is formed between the display 200 and the edge of the upper frame 110c. Alternatively, the receiver hole 2001 is provided in the housing 100. For example, the receiver hole 2001 is provided in the upper frame 110c of the housing 100. It should be understood that the specific structure and position of the receiver hole 2001 are not strictly limited in the embodiments of the present application.

[0042] In this embodiment, the display 200 may be a flexible display or a rigid display. For example, the display 200 may be an organic light-emitting diode (OLED) display, an active-matrix organic light-emitting diode (AMOLED) display, a mini organic light-emitting diode display, a micro organic light-emitting diode display, a micro organic light-emitting diode display, or a quantum dot light emitting diodes (QLED) display, or a Liquid Crystal Display (LCD).

[0043] The receiver is disposed at the top of the communication device 1000, and the sound generated by the receiver is transmitted to the outside of the communication device 1000 through the receiver hole 2001, thereby realizing the sound reproduction function of the communication device 1000. The speaker 300, the connector 400, and the card tray 500 are all disposed at the bottom of the communication device 1000. The sound generated by the speaker 300 is transmitted to the outside of the communication device 1000 through the speaker hole 1001, thereby realizing the sound reproduction function of the communication device 1000. The connector 400 corresponds to the plug hole 1002, and a peer connector (not shown) is electrically connected to the connector 400 through the plug hole 1002, which may perform data transmission or charging of the communication device 1000. The card tray 500 is configured to penetrate the mounting hole 1003 and load a SIM card. The outer surface of the card tray 500 and the outer surface of the frame 110 may be located on the same plane, thereby improving the aesthetic appearance of the communication device 1000.

[0044] FIG. 2 is a schematic diagram of a partial structure of the communication device 1000 shown in FIG.

[0045] The communication device 1000 further includes an antenna module 600. The antenna module 600 includes an antenna 610 and a radio frequency front end 620. The antenna 610 is configured to radiate a radio frequency signal to the outside or receive a radio frequency signal from the outside so that the communication device 1000 can communicate with the outside through the antenna. For example, the antenna may be an inverted f-shaped antenna (IFA), a monopole antenna, a composite right and left hands antenna (CRLH antenna), or a loop antenna. The radio frequency front end 620 is electrically connected to the antenna 610 and configured to supply a radio frequency signal to the antenna 610 or receive an external radio frequency signal received by the antenna 610. It will be understood that based on different forms of the antenna 610, the radio frequency front end 620 may optionally feed the antenna 610 in a low impedance feeding manner or a high impedance feeding manner, which is not particularly limited in the present application.

[0046] In some embodiments, the radio frequency front end 620 may include a transmit channel and a receive channel (not shown). The transmit channel may include components such as a power amplifier and a filter. The components such as the power amplifier and the filter may perform processing such as power amplification and filtering on the radio frequency signal, transmit the radio frequency signal to the antenna 610, and transmit the radio frequency signal to the outside via the antenna 610. The receive channel may include components such as a low noise amplifier and a filter. The components such as the low noise amplifier and the filter may perform processing such as low noise amplification and filtering on the external radio frequency signal received by the antenna 610, and transmit the external radio frequency signal to the radio frequency chip, so that the communication device 1000 communicates with the outside via the radio frequency front end 620 and the antenna 610.

[0047] The antenna 610 includes a first radiator 10 and a second radiator 20. Specifically, the first radiator 10 and the second radiator 20 may be coupled to each other. It should be noted that the fact that the first radiator 10 and the second radiator 20 may be coupled to each other means that when the first radiator 10 supplies a radio frequency signal, the first radiator 10 may be coupled to the second radiator 20, and when the second radiator 20 supplies a radio frequency signal, the second radiator 20 may be coupled to the first radiator 10. For example, the first radiator 10 and the second radiator 20 are both L-shaped. Note that the shapes of the first radiator 10 and the second radiator 20 are not limited to the L-shape shown in FIG. 2, and may alternatively be an I-shape or other special shapes. The shapes of the first radiator 10 and the second radiator 20 are not particularly limited in the present application.

[0048] In some embodiments, the frame 110 includes a first metal segment 110e and a second metal segment 110f spaced apart from each other. The first metal segment 110e forms the first radiator 10, and the second metal segment 110f forms the second radiator 20. Specifically, the frame 110 may be made of a metal material, and the frame 110 is grounded. A part of the frame 110 may be used as the first radiator 10, and a part of the frame 110 may be used as the second radiator 20, so that the space occupied by the antenna 610 is reduced. The lower frame 110d is provided with a first slot 111 and a second slot 112 spaced apart from each other. The first metal segment 110e is located on a side of the first slot 111 that is remote from the second slot 112, and the second metal segment 110f is located on a side of the second slot 112 that is remote from the first slot 111. It will be understood that other portions of the frame 110 other than the first metal segment 110e and the second metal segment 110f may also be used as radiators for other antennas (such as a Wi-Fi antenna or a GPS antenna) of the communication device 1000. In some other embodiments, the frame 110 may also include one slot or more than three slots, provided that the first radiator 10 and the second radiator 20 may be coupled to each other.

[0049] Furthermore, a portion of the frame 110 located between the first slot 111 and the second slot 112 forms a suspended metal piece 113. The first radiator 10 and the second radiator 20 may be coupled to each other via the first slot 111, the suspended metal piece 113, and the second slot 112. The widths of the first slot 111 and the second slot 112 are both 0.5 mm or more and 0.8 mm or less. For example, the first slot 111 and the second slot 112 may be filled with a dielectric material to enhance the effect of electrical insulation between the first radiator 10 and the second radiator 20 and other portions of the frame 110.

[0050] In some other embodiments, the frame 110 may alternatively be made of a non-metallic material. In this case, the frame 110 cannot be used as the first radiator 10 and the second radiator 20 of the antenna 610. The first radiator 10 and the second radiator 20 may be disposed inside the frame 110. For example, the first radiator 10 and the second radiator 20 are spaced apart from each other and disposed relative to the frame 110, so that the space occupied by the antenna 610 is reduced. In this case, the first radiator 10 and the second radiator 20 are closer to the outside of the communication device 1000. This helps to improve the signal transmission efficiency of the antenna 610. It should be noted that in this application, the first radiator 10 and the second radiator 20 are positioned relative to the frame 110, which means that the first radiator 10 and the second radiator 20 may be firmly attached to the frame 110 or may be positioned close to the frame 110, i.e., there may be a certain small slot between the first radiator 10 and the second radiator 20 and the frame 110.

[0051] In this case, there is no need to provide the first slot 111 and the second slot 112 in the frame 110, and the radio frequency signals output or received by the first radiator 10 and the second radiator 20 can be transmitted through the frame 110. This avoids the limitation of the frame 110 on the transmission of radio frequency signals. For example, the antenna 610 may be in the form of an antenna such as a flexible printed circuit (FPC), a laser-direct-structuring (LDS) antenna, a microstrip disk antenna (MDA), etc.

[0052] The first radiator 10 has a first feed point 101, a first ground point 102, and a first connection point 103. The first feed point 101 is provided at an end of the first radiator 10 on the first slot 111 side. The first feed point 101 is electrically connected to the radio frequency front end 620 and configured to supply a radio frequency signal of the radio frequency front end 620 to the first radiator 10 or transmit a radio frequency signal received by the first radiator 10 to the radio frequency front end 620. The second ground point 103 is provided at an end of the first radiator 10 away from the first slot 111 and is grounded. The first connection point 103 is provided at an end of the first feed point 101 away from the first slot 111 and is close to the first feed point 101.

[0053] In some embodiments, the antenna 610 further includes a first feeding component 11, a first grounding component 12, and a first tuning circuit 13. Specifically, one end of the first feeding component 11 is connected to the radio frequency front end 620, and the other end is connected to the first radiator 10. The other end of the first feeding component 11 is connected to the first feeding point 101. In other words, the radio frequency front end 620 may be connected to the first feeding point 101 of the first radiator 10 through the first feeding component 11. For example, the first feeding component 11 may be a feeding component such as a feeding spring or a feeding wire. It should be noted that the first feeding point 101 described in the embodiments of the present application is not an actual point, but the position where the first radiator 10 is connected to the first feeding component 11 is the first feeding point 101. In some other embodiments, the antenna 610 may alternatively not include the first ground component 12 .

[0054] The first grounding component 12 has one end connected to the first radiator 10 and the other end grounded. Specifically, one end of the first grounding component 12 is connected to the first connection point 103. In other words, the first radiator 10 may be grounded through the first grounding component 12. For example, the first grounding component 12 may be a grounding component such as a grounding spring or a grounding wire. It should be noted that the first connection point 103 described in the embodiment of the present application is not an actual point, but the position where the first radiator 10 is connected to the first grounding component 12 is the first connection point 103.

[0055] One end of the first tuning circuit 13 is connected to the first radiator 10 and the other end is grounded, and the first tuning circuit 13 is configured to adjust the electrical length of the first radiator 10. One end of the first tuning circuit 13 is connected to both the first power supply component 11 and the first ground component 12. In this embodiment, the first tuning circuit 13 includes a first changeover switch 14 and a plurality of different first tuning elements 15. The plurality of different first tuning elements 15 are all connected to the first radiator 10. One end of the first changeover switch 14 is grounded, and the other end is switchably connected to the different first tuning elements 15 to adjust the electrical length of the first radiator 10. The first tuning elements 15 may be components such as a capacitor, an inductor, or a resistor.

[0056] For example, there are four first tuning elements 15. The first changeover switch 14 includes four single-pole single-throw switches 141, and the four single-pole single-throw switches 141 are connected in parallel. Specifically, one end of each single-pole single-throw switch 141 is grounded. The other ends of two single-pole single-throw switches 141 are connected to the first feeding component 11 via two different first tuning elements 15, and the other ends of the other two single-pole single-throw switches 141 are connected to the first grounding component 12 via the other two first tuning elements 15. By adjusting the status of the first changeover switch 14, i.e., by controlling the four single-pole single-throw switches 141 to be off or on, the electrical length of the first radiator 10 can be adjusted to change the resonant frequency of the first radiator 10, so that the first radiator 10 can be switched between different operating bands based on actual requirements, and the antenna 610 can cover different operating bands.

[0057] In some other embodiments, there may be two, three, or more than five first tuning elements 15. In this case, the first changeover switch 14 may correspondingly include two, three, or more than five single-pole, single-throw switches. Alternatively, the first changeover switch 14 may be other types of changeover switches, for example, may include a physical switch such as a single-pole, multiple-throw switch or a multiple-pole, multiple-throw switch, or may be a switchable interface such as a mobile industry processor interface (MIPI) or a general-purpose input / output interface (GPIO).

[0058] The second radiator 20 has a second feed point 201 and a second ground point 202. The second feed point 201 is provided at an end of the second radiator 20 on the second slot 112 side. The second feed point 201 is electrically connected to the radio frequency front end 620 and configured to supply a radio frequency signal of the radio frequency front end 620 to the second radiator 20 or transmit a radio frequency signal received by the second radiator 20 to the radio frequency front end 620. The second ground point 202 is provided at an end of the second radiator 20 away from the second slot 112 and is grounded.

[0059] In some embodiments, the antenna 610 further includes a second feeding component 21, a second grounding component 22, and a second tuning circuit 23. Specifically, one end of the second feeding component 21 is connected to the radio frequency front end 620, and the other end is connected to the second radiator 20. The other end of the second feeding component 21 is connected to a second feeding point 201. For example, the second feeding component 21 may be a feeding component such as a feeding spring or a feeding wire. It should be noted that the second feeding point 201 described in the embodiments of the present application is not an actual point, but the position where the second radiator 20 is connected to the second feeding component 21 is the second feeding point 201.

[0060] The second ground component 22 has one end connected to the second radiator 20 and the other end grounded. Specifically, one end of the second ground component 22 is connected to the second ground point 202. In other words, the second radiator 20 may be grounded via the second ground component 22. For example, the second ground component 22 may be a ground component such as a ground spring or a ground wire. In some other embodiments, the antenna 610 may not include the second ground component 22, and the second ground point 202 is directly grounded. It should be noted that the second ground point 202 described in the embodiments of the present application is not an actual point, and the ground position of the second radiator 20 is the second ground point 202.

[0061] One end of the second tuning circuit 23 is connected to the second radiator 20 and the other end is grounded, and the second tuning circuit 23 is configured to adjust the electrical length of the second radiator 20. One end of the second tuning circuit 23 is connected to the second power supply component 21. In this embodiment, the second tuning circuit 23 includes a second changeover switch 24 and a plurality of different second tuning elements 25. The plurality of different second tuning elements 25 are all connected to the second radiator 20. One end of the second changeover switch 24 is grounded, and the other end is switchably connected to the different second tuning elements 25 to adjust the electrical length of the second radiator 20. The second tuning elements 25 may be components such as a capacitor, an inductor, a resistor, etc.

[0062] For example, there are four second tuning elements 25. The second changeover switch 24 includes four single-pole single-throw switches 241, and the four single-pole single-throw switches 241 are connected in parallel. Specifically, one end of each of the four single-pole single-throw switches 241 is grounded, and the other end is connected to the second feeding component 21 via a different second tuning element 25. By adjusting the status of the second changeover switch 24, i.e., by controlling the four single-pole single-throw switches 241 to be off or on, the electrical length of the second radiator 20 can be adjusted to change the resonant frequency of the second radiator 20, so that the second radiator 20 can be switched between different operating bands based on actual requirements, and the antenna 620 can cover different operating bands.

[0063] In some other embodiments, there may be one, two, three, or more than five second tuning elements 25. In this case, the second changeover switch 24 may correspondingly include one, two, three, or more than five single-pole, single-throw switches. Alternatively, the second changeover switch 24 may be multiple types of changeover switches, for example, may include a physical switch such as a single-pole, multiple-throw switch or a multiple-pole, multiple-throw switch, or may be a switchable interface such as a mobile industry processor interface (MIPI) or a general-purpose input / output interface (GPIO).

[0064] In addition, the antenna 610 may further include a third ground component (not shown). The third ground component has one end connected to the second radiator 20 and the other end grounded. In this case, some of the second tuning elements 25 are connected to the second feeding component 21, and some of the second tuning elements 25 are connected to the third ground component. One end of the second changeover switch 24 is grounded, and the other end is switchably connected to different second tuning elements 25 to adjust the electrical length of the second radiator 20.

[0065] In this embodiment, the antenna 610 further includes a first feed (FEED) 31, a first feeder 40, and a second feeder 50. The first feed 31 is electrically connected to the radio frequency front end 620. In this embodiment, the first feed 31 is a full band feed. Specifically, the first feed 31 is a feed covering three bands, namely, low band (LB), middle band (MB), and high band (HB). In other words, the radio frequency front end 620 feeds the antenna 610 by sharing the feed. It should be understood that in the embodiment of the present application, the low band means a frequency of 700MHz to 1000MHz, the middle band means a frequency of 1500MHz to 2200MHz, and the high band means a frequency of 2300MHz to 2700MHz.

[0066] The first feeder 40 is electrically connected between the first feed 31 and the first radiator 10. In other words, the first feed 31 is electrically connected to the first radiator 10 via the first feeder 40. The first feeder 40 is electrically connected to the first radiator 10 via the first power supply component 11. In this case, since the first feed 31 is electrically connected to the first power supply point 101 via the first feeder 40 and the first power supply component 11, the first feed 31 can supply a radio frequency signal to the first radiator 10 via the first feeder 40 and the first power supply component 11, and receive an external radio frequency signal received by the first radiator 10 via the first feeder 40 and the first power supply component 11.

[0067] The second feeder 50 is electrically connected between the first feed 31 and the second radiator 20. In other words, the first feed 31 is electrically connected to the second radiator 20 via the second feeder 50. The second feeder 50 is electrically connected to the second radiator 20 via the second feeding component 21. In this case, the first feed 31 may supply a radio frequency signal to the second radiator 20 via the second feeder 50 and the second feeding component 21, and receive an external radio frequency signal received by the second radiator 20 via the second feeder 50 and the second feeding component 21.

[0068] In addition, the antenna 610 further includes a switch 60. The switch 60 is disposed on the second feeder 50 and connected between the first feed 31 and the second radiator 20. The switch 60 is electrically connected to the second radiator 20 via the second feeding component 21. In some other embodiments, the switch 60 may alternatively be disposed on the first feeder 40 and connected between the first feed 31 and the first radiator 10. Alternatively, the radio frequency front end 620 includes two switches 60. One switch 60 is disposed on the first feeder 40 and connected between the first feed 31 and the first radiator 10, and the other switch 60 is disposed on the second feeder 50 and connected between the first feed 31 and the second radiator 20.

[0069] For example, the switch 60 includes a single-pole, single-throw switch. The switch 60 includes a movable end 60a and a non-movable end 60b. The end of the movable end 60a remote from the non-movable end 60b is electrically connected to the first feed 31, and the end of the non-movable end 60b remote from the movable end 60a is electrically connected to the second power supply component 21. In some other embodiments, the end of the movable end 60a remote from the movable end 60b may alternatively be electrically connected to the second power supply component 21, and the end of the movable end 60b remote from the movable end 60a may alternatively be electrically connected to the first feed 31.

[0070] When the switch 60 is turned on, the movable end 60a is connected to the non-movable end 60b, and the antenna 610 is in a first operating mode. The first feed 31 supplies radio frequency signals to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies radio frequency signals to the first radiator 10 via the first feeder 40, and supplies radio frequency signals to the second radiator 20 via the second feeder 50. In other words, the first feed 31 may excite the first radiator 10 and the second radiator 20 simultaneously. In addition, the first feed 31 may further receive an external radio frequency signal received by the first radiator 10 via the first feeder 40, and may further receive an external radio frequency signal received by the second radiator 20 via the second feeder 50. In some other embodiments, the antenna 610 may alternatively not include the switch 60. In this case, the antenna 610 is always in the first mode of operation, which can also reduce the SAR value of the antenna 610 and optimize the specific absorption rate characteristics of the antenna 610.

[0071] For example, the radio frequency signal of the radio frequency front end 620 may be split by a power splitter (not shown) into two radio frequency signals with equal power, one radio frequency signal being fed to the first radiator 10 via the first feeder 40 and the other radio frequency signal being fed to the second radiator 20 via the second feeder 50. In some other embodiments, the radio frequency signal of the radio frequency front end 620 may alternatively be split by a power splitter into two radio frequency signals with unequal power.

[0072] In this case, the first radiator 10 and the second radiator 20 receive radio frequency signals in phase (i.e., the phase difference is 0), the first radiator 10 and the second radiator 20 are coupled to each other via the first slot 111 and the second slot 112, the electrical lengths of the first radiator 10 and the second radiator 20 are identical, the first radiator 10 and the second radiator 20 operate at the same frequency, and a single resonance is generated. The currents near the first radiator 10 and the second radiator 20 are evenly distributed, and the first radiator 10 and the second radiator 20 can be more fully excited. This helps to reduce the SAR value of the antenna 610, improving the antenna efficiency and the beside head and hand (BHH) performance of the antenna.

[0073] When the switch 60 is turned off, the movable end 60a is not connected to the non-movable end 60b, and the antenna 610 is in a second operating mode. The first feed 31 supplies a radio frequency signal to the first radiator 10. Specifically, the first feed 31 supplies a radio frequency signal to the first radiator 10 via the first feeder 40. In other words, the first feed 31 can only excite the first radiator 10, but cannot excite the second radiator 20. In addition, the first feed 31 may further receive an external radio frequency signal received by the first radiator 10 via the first feeder 40.

[0074] In this case, the second radiator 20 is used as a parasitic radiator of the first radiator 10, and the first radiator 10 is coupled to the second radiator 20 via the first slot 111 and the second slot 112 to excite the second radiator 20. The current near the first radiator 10 is strong, and the current near the second radiator 20 is weak. In other words, the current near the first radiator 10 and the second radiator 20 is distributed unevenly.

[0075] In the communication device 1000 shown in this embodiment, by controlling the switch 60 to be off or on, the first radiator 10 can be excited separately, or the first radiator 10 and the second radiator 20 can be excited simultaneously, to control the switching between the first and second operation modes of the antenna 610, and the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be further changed. This helps to improve the antenna efficiency and the beside-head-and-hand performance of the antenna, and optimizes the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0076] FIG. 3 is a second schematic diagram of a partial structure of the communication device 1000 according to an embodiment of the present application.

[0077] The difference between the communication device 1000 of this embodiment and the communication device 1000 of the previous embodiment is that the antenna 610 further includes a plurality of phase shifters 70. The plurality of phase shifters 70 are arranged in parallel on the second feeder 50 and connected between the switch 60 and the second radiator 20. The phase adjustment values ​​of the plurality of phase shifters 70 are different. The switch 60 is switchably connected to the different phase shifters 70 to adjust the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20.

[0078] For example, there are three phase shifters 70. For ease of understanding, the three phase shifters 70 are referred to as a first phase shifter 71, a second phase shifter 72, and a third phase shifter 73, respectively. Specifically, the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all disposed on the second feeder 50 and are arranged in parallel. The first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all connected between the switch 60 and the second feeding component 21 and configured to change the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20. It will be understood that in some other embodiments, there may be one, two, or more than four phase shifters 70. This is not particularly limited in the present application.

[0079] The phase adjustment value of the first phase shifter 71 is 0°, the phase adjustment value of the second phase shifter 72 is 90°, and the phase adjustment value of the third phase shifter 73 is 180°. It should be noted that in some other embodiments, the phase adjustment values ​​of the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 may alternatively be other values, which is not particularly limited in the present application.

[0080] In this embodiment, the switch 60 includes a first single-pole single-throw switch 61, a second single-pole single-throw switch 62, and a third single-pole single-throw switch 63. The first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all disposed on the second feeder 50 and are arranged in parallel. Specifically, the movable ends (not shown) of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all connected to the first feed 31. The non-movable end (not shown) of the first single-pole single-throw switch 61 is connected to the first phase shifter 71, the non-movable end (not shown) of the second single-pole single-throw switch 62 is connected to the second phase shifter 72, and the non-movable end (not shown) of the third single-pole single-throw switch 63 is connected to the third phase shifter 73.

[0081] In some other embodiments, the non-moving ends (not shown) of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 may all be connected to the first feed 31. In this case, the moving end (not shown) of the first single-pole single-throw switch 61 may be connected to a first phase shifter 71, the moving end (not shown) of the second single-pole single-throw switch 62 may be connected to a second phase shifter 72, and the moving end (not shown) of the third single-pole single-throw switch 63 may be connected to a third phase shifter 73.

[0082] When the first single-pole single-throw switch 61 is turned on and the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are both turned off, the movable end of the first single-pole single-throw switch 61 is connected to the non-movable end, and neither of the movable ends of the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 is connected to the non-movable end, and the antenna 610 is in a first operating mode. The first feed 31 supplies radio frequency signals to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies radio frequency signals to the first radiator 10 via the first feeder 40 and supplies radio frequency signals to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive external radio frequency signals received by the first radiator 10 via the first feeder 40, and may further receive external radio frequency signals received by the second radiator 20 via the second feeder 50.

[0083] In this case, the first phase shifter 71 is connected to the second feeder 50, and the first phase shifter 71 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 0°. In other words, the first phase shifter 71 does not adjust the phase of the radio frequency signal supplied by the first feed 31 to the second feeding point 201. That is, the phases of the radio frequency signals received at the first radiator 10 and the second radiator 20 are the same, and the phase difference is 0°. It will be understood that the status of the communication device 1000 in this case is the same as the status of the communication device 1000 obtained when the switch 60 is turned on in the previous embodiment. The details will not be described again here.

[0084] When the switch 60 is turned off, the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all turned off, none of the movable ends of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are connected to the non-movable ends, and the antenna 610 is in the second operating mode. In this case, the first feed 31 can feed the first radiator 10 via the first feeder 40, but cannot feed the second radiator 20 via the second feeder 50. It will be understood that the status of the communication device 1000 in this case is the same as the status of the communication device 1000 obtained when the switch 60 is turned off in the previous embodiment. The details will not be described again here.

[0085] When the second single-pole single-throw switch 62 is turned on and the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are both turned off, the movable end of the second single-pole single-throw switch 62 is connected to the non-movable end, and neither the movable end of the first single-pole single-throw switch 61 nor the third single-pole single-throw switch 63 is connected to the non-movable end, and the antenna 610 is in a third operating mode. The first feed 31 supplies radio frequency signals to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies radio frequency signals to the first radiator 10 via the first feeder 40 and supplies radio frequency signals to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive external radio frequency signals received by the first radiator 10 via the first feeder 40, and may further receive external radio frequency signals received by the second radiator 20 via the second feeder 50.

[0086] In this case, the second phase shifter 72 is connected to the second feeder 50, and the second phase shifter 72 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 90°. That is, the first radiator 10 and the second radiator 20 receive radio frequency signals with different phases, the phase difference is 90°. The first radiator 10 and the second radiator 20 are coupled to each other via the first slot 111 and the second slot 112, and the electrical lengths of the first radiator 10 and the second radiator 20 are different, and the first radiator 10 and the second radiator 20 operate at different frequencies, and a double resonance is generated.

[0087] When the third single-pole single-throw switch 63 is turned on and the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are both turned off, the movable end of the third single-pole single-throw switch 63 is connected to the non-movable end, and neither the movable end of the first single-pole single-throw switch 61 nor the second single-pole single-throw switch 62 is connected to the non-movable end, and the antenna 610 is in a fourth operation mode. The first feed 31 supplies radio frequency signals to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies radio frequency signals to the first radiator 10 via the first feeder 40 and supplies radio frequency signals to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive external radio frequency signals received by the first radiator 10 via the first feeder 40, and may further receive external radio frequency signals received by the second radiator 20 via the second feeder 50.

[0088] In this case, the third phase shifter 73 is connected to the second feeder 50, and the third phase shifter 73 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 180°. That is, the first radiator 10 and the second radiator 20 receive radio frequency signals with different phases, the phase difference is 180°. The first radiator 10 and the second radiator 20 are coupled to each other via the first slot 111 and the second slot 112, the electrical lengths of the first radiator 10 and the second radiator 20 are the same, and the first radiator 10 and the second radiator 20 operate at the same frequency, and a single resonance is generated.

[0089] In some other embodiments, the switch 60 may alternatively include a single-pole, multi-throw switch. In this case, the switch 60 includes a movable end and three non-movable ends. The movable end remote from the non-movable end is connected to the first feed 31, and the three non-movable ends remote from the movable end are connected to a first phase shifter 71, a second phase shifter 72, and a third phase shifter 73, respectively. When the movable end is switchably connected to a different non-movable end, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 is connected to the second feeder 50 to adjust different phases of the radio frequency signal provided by the first feed 31 to the second feed point 201.

[0090] In the communication device 1000 shown in this embodiment, by controlling the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 to be on and off, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 can be connected to the second feeder 50, so that the first radiator 10 can be excited separately, or the first radiator 10 and the second radiator 20 can be excited simultaneously, and the phase difference between the radio frequency signals supplied to the first radiator 10 and the second radiator 20 by the first feed 31 can be further adjusted to control the switching of the operation mode of the antenna 610. In addition, the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be changed. This helps to improve antenna efficiency and the beside head-and-hand performance of the antenna, and optimizes the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0091] FIG. 4 is a third schematic diagram of a partial structure of the communication device 1000 according to an embodiment of the present application.

[0092] The communication device 1000 of this embodiment differs from the communication device 1000 of the first embodiment in that the antenna 710 includes a phase adjuster 70, and the phase adjuster 70 is disposed on the second feeder 50. The phase adjuster 70 is connected between the switch 60 and the second radiator 20 and configured to change the phase of the radio frequency signal supplied to the second feeding point 201 by the first feed 31. The phase adjuster 70 has one end connected to the non-movable end 60b of the switch 60 and the other end connected to the second feeding component 21. For example, the phase adjuster 70 has multiple phase adjustment values, for example, 0°, 90°, and 180°.

[0093] When the switch 60 is turned off, the movable end 60a of the switch 60 is not connected to the non-movable end 60b, and the antenna 610 is in a second operating mode. In this case, the first feed 31 can feed the first radiator 10 via the first feeder 40, but cannot feed the second radiator 20 via the second feeder 50. It will be understood that the status of the communication device 1000 in this case is the same as the status of the communication device 1000 obtained when the switch 60 is turned off in the previous embodiment. The details will not be described again here.

[0094] When the switch 60 is turned on, the movable end 60a of the switch 60 is connected to the non-movable end 60b, and the first feed 31 supplies a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies a radio frequency signal to the first radiator 10 via the first feeder 40, and supplies a radio frequency signal to the second radiator 20 via the second feeder 50.

[0095] In this case, the phase adjuster 70 is connected to the second feeder 50, and the phase adjuster 70 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20. It will be understood that when the phase adjuster 70 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 0°, the status of the communication device 100 is the same as the status obtained when the first single-pole single-throw switch 61 is turned on in the second embodiment (i.e., when the antenna 610 is in the first operating mode). When the phase adjuster 70 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 90°, the status of the communication device 100 is the same as the status obtained when the second single-pole single-throw switch 62 is turned on in the second embodiment (i.e., when the antenna 610 is in the second operating mode). When the phase adjuster 70 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 180°, the status of the communication device 100 is the same as the status obtained when the third single-pole, single-throw switch 63 is turned on in the second embodiment (i.e., when the antenna 610 is in the third operating mode), the details of which will not be described again here.

[0096] In the communication device 1000 shown in this embodiment, by controlling the switch 60 to be on and off, the phase adjuster 70 can be connected to the second feeder 50, so that the first radiator 10 can be excited separately, or the first radiator 10 and the second radiator 20 can be excited simultaneously, and the phase difference between the radio frequency signals supplied to the first radiator 10 and the second radiator 20 by the first feed 31 can be further adjusted to control the switching of the operation mode of the antenna 610. In addition, the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be changed. This helps to improve the antenna efficiency and the beside head-and-hand performance of the antenna, and optimizes the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0097] FIG. 5 is a fourth schematic diagram of a partial structure of the communication device 1000 according to an embodiment of the present application.

[0098] The communication device 1000 of this embodiment differs from the communication device 1000 of the first embodiment in that the first feed 31 is a mid-high band feed (MHB FEED). Specifically, the first feed 31 is a feed covering two bands, a mid-band and a high-band. The antenna 610 further includes a second feed 32, a third feeder 80, a first filter 91, and a second filter 92. The second feed 32 is electrically connected to the radio frequency front end 620. The second feed 32 is a low-band feed (LB FEED). Specifically, the second feed 32 is a feed covering the low band. In other words, the radio frequency front end 620 feeds the antenna 610 so that a low-band signal and a mid-high band signal are separately supplied. In some other embodiments, the first feed 31 may alternatively be a low-band feed, and the second feed 32 may alternatively be a mid-high band feed.

[0099] In this embodiment, the first feed 31 is electrically connected to the first radiator 10 via the first feeder 40, so that the first feed 31 can supply mid- and high-band radio frequency signals to the first radiator 10 via the first feeder 40 and receive external mid- and high-band radio frequency signals received by the first radiator 10 via the first feeder 40. The first feed 31 is electrically connected to the second radiator 20 via the second feeder 50, so that the first feed 31 can supply mid- and high-band radio frequency signals to the second radiator 20 via the second feeder 50 and receive external mid- and high-band radio frequency signals received by the second radiator 20 via the second feeder 50.

[0100] The third feeder 80 is electrically connected between the second feed 32 and the second radiator 20. In other words, the second feed 32 is electrically connected to the second radiator 20 via the third feed 80. The third feeder 80 is electrically connected to the second radiator 20 via the second feeding component 21. In this case, the second feed 32 may supply a low-band radio frequency signal to the second radiator 20 via the third feeder 80 and the second feeding component 21, and receive an external low-band radio frequency signal received by the second radiator 20 via the third feeder 80 and the second feeding component 21.

[0101] It should be noted that in some other embodiments, the third feeder 80 may alternatively be electrically connected between the second feed 32 and the first radiator 10. In other words, the second feed 32 is electrically connected to the first radiator 10 via the third feeder 80. The third feeder 80 is electrically connected to the first radiator 10 via the first power supply component 11. In this case, the second feed 32 may supply a low-band radio frequency signal to the first radiator 10 via the third feeder 80 and the first power supply component 11, and receive an external low-band radio frequency signal received by the first radiator 10 via the third feeder 80 and the first power supply component 11.

[0102] The second filter 92 is disposed on the third feeder 80 and connected between the second feed 32 and the second radiator 20 to filter out mid- and high-band radio frequency signals passing between the second feed 32 and the second radiator 20. In other words, the second filter 92 is configured to pass low-band radio frequency signals and block the passage of mid- and high-band radio frequency signals.

[0103] In this embodiment, the second feed 32 excites the second radiator 20 individually. The second feed 32 may supply the second radiator 20 via the third feeder 80. Specifically, the second feed 32 may supply a low-band radio frequency signal to the second radiator 20 via the third feeder 80, and may further receive an external low-band radio frequency signal received by the second radiator 20 via the third feeder 80. The second filter 92 may remove an external mid- and high-band radio frequency signal received by the second radiator 20. In this case, the first radiator 10 may be used as a parasitic radiator of the second radiator 20, and the second radiator 20 may be coupled to the first radiator 10 via the first slot 111 and the second slot 112 to excite the first radiator 10.

[0104] The first filter 91 is disposed on the second feeder 50 and connected between the first feed 31 and the second radiator 20 to remove low-band radio frequency signals flowing between the first feed 31 and the second feeding point 201 of the second radiator 20. In other words, the first filter 91 is configured to pass mid- and high-band radio frequency signals and block the passage of low-band radio frequency signals. Specifically, the first filter 91 is connected between the switch 60 and the second radiator 20.

[0105] In this embodiment, the switch 60 includes a single-pole, single-throw switch. The switch 60 includes a movable end 60a and a non-movable end 60b. The end of the movable end 60a remote from the non-movable end 60b is electrically connected to the first feed 31, and the end of the non-movable end 60b remote from the movable end 60a is electrically connected to the first filter 91. In some other embodiments, the end of the movable end 60a remote from the movable end 60b may alternatively be electrically connected to the first filter 91, and the end of the movable end 60b remote from the movable end 60a may alternatively be electrically connected to the first feed 31.

[0106] When the switch 60 is turned on, the movable end 60a of the switch 60 is connected to the non-movable end 60b, and the antenna 610 is in a first operating mode. The first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 via the first feeder 40, and supplies the mid-high band radio frequency signal to the second radiator 20 via the second feeder 50. In other words, the first feed 31 may excite the first radiator 10 and the second radiator 20 simultaneously. In addition, the first feed 31 may further receive an external mid-high band radio frequency signal received by the first radiator 10 via the first feeder 40, and may further receive an external mid-high band radio frequency signal received by the second radiator 20 via the second feeder 50. In this case, the first filter 91 may be connected to the second feeder 50 to remove external low-band radio frequency signals received by the second radiator 20 .

[0107] For example, the mid-high band radio frequency signal of the radio frequency front end 620 may be split by a power splitter (not shown) into two mid-high band radio frequency signals having equal power. One mid-high band radio frequency signal is fed to the first radiator 10 via the first feeder 40, and the other mid-high band radio frequency signal is transmitted to the second radiator 20 via the second feeder 50. In some other embodiments, the mid-high band radio frequency signal of the radio frequency front end 620 may alternatively be split by a power splitter into two mid-high band radio frequency signals having unequal power.

[0108] In this case, the phases of the mid-high band radio frequency signals received by the first radiator 10 and the second radiator 20 are the same (i.e., the phase difference is 0), the first radiator 10 and the second radiator 20 can be coupled to each other via the first slot 111 and the second slot 112, the electrical lengths of the first radiator 10 and the second radiator 20 are identical, the first radiator 10 and the second radiator 20 operate at the same frequency, and a single resonance is generated. The currents near the first radiator 10 and the second radiator 20 are evenly distributed, and the first radiator 10 and the second radiator 20 can be more fully excited. This helps to reduce the SAR value of the antenna 610, improving the antenna efficiency and the beside-head-and-hand performance of the antenna.

[0109] It should be appreciated that the mid- and high-band radio frequency signals have a large effect on the SAR value of the antenna 610. In this embodiment, the antenna 610 is powered such that the low-band and mid- and high-band signals are fed separately, which is more conducive to tuning the mid- and high-band radio frequency signals and optimizing the specific absorption rate characteristics of the antenna 610.

[0110] When the switch 60 is turned off, the movable end 60a of the switch 60 is not connected to the non-movable end 60b, and the antenna 610 is in a second operation mode. The first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10. Specifically, the first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 via the first feeder 40. In other words, the first feed 31 can only excite the first radiator 10, but cannot excite the second radiator 20. In addition, the first feed 31 may further receive an external mid-high band radio frequency signal received by the first radiator 10 via the first feeder 40.

[0111] In this case, the second radiator 20 is used as a parasitic radiator of the first radiator 10, and the first radiator 10 is coupled to the second radiator 20 via the first slot 111 and the second slot 112 to excite the second radiator 20. The current near the first radiator 10 is strong, and the current near the second radiator 20 is weak. In other words, the current near the first radiator 10 and the second radiator 20 is distributed unevenly.

[0112] In the communication device 1000 of this embodiment, by controlling the switch 60 to be off or on, the first feed 31 can excite the first radiator 10 separately, or excite the first radiator 10 and the second radiator 20 simultaneously to control the switching of the operation mode of the antenna 610. In addition, the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be changed. This helps to improve the antenna efficiency and the beside-head-and-hand performance of the antenna, optimize the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0113] FIG. 6 is a fifth schematic diagram of a partial structure of the communication device 1000 according to an embodiment of the present application.

[0114] The difference between the communication device 1000 of this embodiment and the communication device 1000 of the fourth embodiment is that the antenna 610 further includes a plurality of phase shifters 70. The plurality of phase shifters 70 are arranged in parallel on the second feeder 50 and connected between the switch 60 and the second radiator 20. The phase adjustment values ​​of the plurality of phase shifters 70 are different. The switch 60 is switchably connected to the different phase shifters 70 to adjust the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20.

[0115] For example, there are three phase shifters 70. For ease of understanding, the three phase shifters 70 are referred to as a first phase shifter 71, a second phase shifter 72, and a third phase shifter 73, respectively. Specifically, the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all disposed on the second feeder 50 and are arranged in parallel. The first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all connected between the switch 60 and the second feeding component 21 and configured to change the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20. It will be understood that in some other embodiments, there may be one, two, or more than four phase shifters 70. This is not particularly limited in the present application.

[0116] The phase adjustment value of the first phase shifter 71 is 0°, the phase adjustment value of the second phase shifter 72 is 90°, and the phase adjustment value of the third phase shifter 73 is 180°. It should be noted that in some other embodiments, the phase adjustment values ​​of the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 may alternatively be other values, which is not particularly limited in the present application.

[0117] In this embodiment, the switch 60 includes a first single-pole single-throw switch 61, a second single-pole single-throw switch 62, and a third single-pole single-throw switch 63. The first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all disposed on the second feeder 50 and are arranged in parallel. Specifically, the movable ends (not shown) of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all connected to the first feed 31. The non-movable end (not shown) of the first single-pole single-throw switch 61 is connected to the first phase shifter 71, the non-movable end (not shown) of the second single-pole single-throw switch 62 is connected to the second phase shifter 72, and the non-movable end (not shown) of the third single-pole single-throw switch 63 is connected to the third phase shifter 73.

[0118] In some other embodiments, the non-moving ends (not shown) of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 may all be connected to the first feed 31. In this case, the moving end (not shown) of the first single-pole single-throw switch 61 may be connected to a first phase shifter 71, the moving end (not shown) of the second single-pole single-throw switch 62 may be connected to a second phase shifter 72, and the moving end (not shown) of the third single-pole single-throw switch 63 may be connected to a third phase shifter 73.

[0119] When the switch 60 is turned off, the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are all turned off, none of the movable ends of the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 are connected to the non-movable ends, and the antenna 610 is in the second operation mode. The first feed 31 supplies a radio frequency signal to the first radiator 10. Specifically, the first feed 31 supplies a radio frequency signal to the first radiator 10 via the first feeder 40. In other words, the first feed 31 can only excite the first radiator 10, but cannot excite the second radiator 20. In addition, the first feed 31 may further receive an external radio frequency signal received by the first radiator 10 via the first feeder 40.

[0120] Figure 7 is a diagram of the return loss coefficient (S11) curve of the antenna 610 in a free state and the efficiency curves of the antenna 610 in different states, obtained when the switch 60 in the communication device 1000 shown in Figure 6 is turned off. The S11 curve diagram is obtained by performing a simulation test when the first feed 31 is feeding but the second feed 32 is not feeding.

[0121] In the curve diagram shown in FIG. 7, the abscissa is frequency (unit: GHz), and the ordinate is return loss coefficient and efficiency (unit: dB). From FIG. 7, it can be seen that in a free space (FS) state, the antenna 610 generates double resonance, i.e., the antenna 610 has two resonance modes. The resonance frequencies are about 1.9 GHz and 2.2 GHz, respectively. When the communication device 1000 is in a free state, the radiation efficiency of the antenna 610 is −2.1204 dB at a frequency of 1.9 GHz. When the communication device 1000 is in a beside head-and-hand state (a user holds the communication device 1000 in his / her hand and places the communication device 1000 next to his / her head), the radiation efficiency of the antenna 610 is −9.8664 dB at a frequency of 1.9 GHz. That is, the radiation efficiency of the antenna 610 is reduced by 7.746 dB in the beside head-and-hand state compared to the free state.

[0122] FIG. 8 is a schematic diagram of the current distribution obtained when the switch 60 of the communication device 1000 shown in FIG. 6 is turned off.

[0123] FIG. 8 is a diagram showing the current distribution at a frequency of 1.9 GHz. The current at the position of the dense arrow is strong, and the current at the position of the sparse arrow is weak. From FIG. 8, it can be seen that the current flows generally along the direction from the second radiator 20 to the first radiator 10. The second radiator 20 is used as a parasitic radiator of the first radiator 10, and the first radiator 10 is coupled to the second radiator 20 through the first slot 111 and the second slot 112 to excite the second radiator 20. The current near the first radiator 10 is strong, and the current near the second radiator 20 is weak. In other words, the current near the first radiator 10 and the second radiator 20 is distributed very unevenly.

[0124] When the first single-pole single-throw switch 61 is turned on and the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are both turned off, the movable end of the first single-pole single-throw switch 61 is connected to the non-movable end, and neither of the movable ends of the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 is connected to the non-movable end, and the antenna 610 is in a first operating mode. The first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 via the first feeder 40, and supplies the mid-high band radio frequency signal to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive, via the first feeder 40, an external mid- to high-band radio frequency signal received by the first radiator 10, and may further receive, via the second feeder 50, an external mid- to high-band radio frequency signal received by the second radiator 20.

[0125] In this case, the first phase shifter 71 is connected to the second feeder 50, and the first phase shifter 71 adjusts the phase of the mid-high band radio frequency signal supplied by the first feed 31 to the second radiator 20 by 0°. In other words, the first phase shifter 71 does not adjust the phase of the mid-high band radio frequency signal supplied by the first feed 31 to the second feeding point 201. That is, the phases of the mid-high band radio frequency signals received by the first radiator 10 and the second radiator 20 are the same, and the phase difference is 0°.

[0126] Figure 9 is a diagram of the return loss coefficient (S11) and efficiency curves of the antenna 610 in a free state obtained when the first single-pole single-throw switch 61 of the communication device 1000 shown in Figure 6 is turned on. The S11 curve diagram is obtained by performing a simulation test when the first feed 31 is feeding but the second feed 32 is not feeding.

[0127] In the curve diagram shown in FIG. 9, the abscissa is frequency (unit: GHz), and the ordinate is efficiency and return loss coefficient (unit: dB). From FIG. 9, it can be seen that when the first single-pole single-throw switch 61 is turned on, the electrical lengths of the first radiator 10 and the second radiator 20 are the same, the first radiator 10 and the second radiator 20 operate at the same frequency, and the antenna 610 generates a single resonance, and the resonance frequency is about 2.2 GHz. In this case, the antenna 610 forms a slot differential mode (slot DM). At a frequency of 2.2249 GHz, the return loss coefficient of the antenna 610 is -6.97 dB, and the radiation efficiency of the antenna 610 is greater than -6 dB.

[0128] FIG. 10 is a diagram of the current distribution at 2.2 GHz obtained when the first single-pole, single-throw switch 61 of the communication device 1000 shown in FIG. 6 is turned on.

[0129] As shown in Fig. 10, the current is strong where the dense arrows are located, and weak where the sparse arrows are located. From Fig. 10, it can be seen that the current flows almost along the direction in which the first radiator 10 and the second radiator 20 move away from each other after they approach each other, and the antenna 610 forms a slot differential mode. The currents near the first radiator 10 and the second radiator 20 are both strong, that is, the currents near the first radiator 10 and the second radiator 20 are evenly distributed. The maximum current density is 235.515A / m.

[0130] FIG. 11 is the radiation pattern of the antenna 610 at 2.2 GHz obtained when the first single-pole, single-throw switch 61 of the communication device 1000 shown in FIG. 6 is turned on.

[0131] The areas with deeper grey scales shown in Figure 11 represent stronger radiation. The white areas indicate weaker radiation. From Figure 11, it can be seen that when the first single-pole single-throw switch 61 is turned on, the antenna 610 forms a slot differential mode.

[0132] When the second single-pole single-throw switch 62 is turned on and the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are both turned off, the movable end of the second single-pole single-throw switch 62 is connected to the non-movable end, and neither the movable end of the first single-pole single-throw switch 61 nor the third single-pole single-throw switch 63 is connected to the non-movable end, and the antenna 610 is in a third operation mode. The first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies the mid-high band radio frequency signal to the first radiator 10 via the first feeder 40, and supplies the mid-high band radio frequency signal to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive, via the first feeder 40, an external mid- to high-band radio frequency signal received by the first radiator 10, and may further receive, via the second feeder 50, an external mid- to high-band radio frequency signal received by the second radiator 20.

[0133] In this case, the second phase shifter 72 is connected to the second feeder 50, and the second phase shifter 72 adjusts the phase of the mid-high band radio frequency signal supplied by the first feed 31 to the second radiator 20 by 90°. That is, the first radiator 10 and the second radiator 20 receive mid-high band radio frequency signals with different phases, the phase difference being 90°.

[0134] Figure 12 is a diagram of the return loss coefficient (S11) and efficiency curves of the antenna 610 in a free state obtained when the second single-pole single-throw switch 62 of the communication device 1000 shown in Figure 6 is turned on. The S11 curve diagram is obtained by performing a simulation test when the first feed 31 is feeding but the second feed 32 is not feeding.

[0135] In Fig. 12, the abscissa is frequency (unit: GHz), and the ordinate is return loss coefficient and efficiency (unit: dB). From Fig. 12, it can be seen that when the second single-pole single-throw switch 62 is turned on, the first radiator 10 and the second radiator 20 are coupled to each other through the first slot 111 and the second slot 112, the electrical lengths of the first radiator 10 and the second radiator 20 are different, the first radiator 10 and the second radiator 20 operate at different frequencies, the first radiator 10 and the second radiator 20 generate double resonance, and the resonance frequencies are around 1.8 GHz and 2.55 GHz. In this case, the antenna 610 forms a slot common mode (slot CM) and a slot differential mode (slot DM). At a frequency of 1.8 GHz, the antenna 610 forms a slot common mode, and the return loss coefficient of the antenna 610 is −6.97 dB. At a frequency of 2.5401 GHz, the antenna 610 forms a slot differential mode, and the return loss coefficient of the antenna 610 is −16.91 dB. In addition, the radiation efficiency of the antenna 610 in the slot common mode is higher than that of the antenna 610 in the slot differential mode.

[0136] FIG. 13 is a current distribution diagram at 1.8 GHz obtained when the second single-pole single-throw switch 62 of the communication device 1000 shown in FIG. 6 is turned on, and FIG. 14 is a current distribution diagram at 2.55 GHz obtained when the second single-pole single-throw switch 62 of the communication device 1000 shown in FIG. 6 is turned on.

[0137] As shown in Fig. 13, the current is strong where the dense arrows are located, and weak where the sparse arrows are located. From Fig. 13, it can be seen that the current flows generally along the direction from the second radiator 20 to the first radiator 10. The currents near the first radiator 10 and the second radiator 20 are both strong, that is, the currents near the first radiator 10 and the second radiator 20 are evenly distributed. In this case, the antenna 610 forms a slot common mode.

[0138] As shown in Fig. 14, the current is strong where the dense arrows are located, and weak where the sparse arrows are located. From Fig. 14, it can be seen that the current flows generally along the direction in which the first radiator 10 and the second radiator 20 move away from each other and then approach each other. The currents near the first radiator 10 and the second radiator 20 are both strong, that is, the currents near the first radiator 10 and the second radiator 20 are evenly distributed. In this case, the antenna 610 forms a slot differential mode.

[0139] FIG. 15 is a radiation pattern of the antenna 610 at 1.8 GHz obtained when the second single-pole single-throw switch 62 of the communication device 1000 shown in FIG. 6 is turned on, and FIG. 16 is a radiation pattern of the antenna 610 at 2.55 GHz obtained when the second single-pole single-throw switch 62 of the communication device 1000 shown in FIG. 6 is turned on.

[0140] Areas with deeper greyscales shown in Figure 15 represent stronger radiation. White areas indicate weaker radiation. From Figure 15, it can be seen that when the second single-pole single-throw switch 62 is turned on, the antenna 610 forms a slot common mode at 1.8 GHz.

[0141] Areas with deeper greyscales shown in Figure 16 represent stronger radiation. White areas indicate weaker radiation. From Figure 16, it can be seen that when the second single-pole single-throw switch 62 is turned on, the antenna 610 forms a slot common mode at 2.55 GHz.

[0142] When the third single-pole single-throw switch 63 is turned on and the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are both turned off, the movable end of the third single-pole single-throw switch 63 is connected to the non-movable end, and neither the movable end of the first single-pole single-throw switch 61 nor the second single-pole single-throw switch 62 is connected to the non-movable end, and the antenna 610 is in a fourth operation mode. The first feed 31 supplies radio frequency signals to the first radiator 10 and the second radiator 20. Specifically, the first feed 31 supplies radio frequency signals to the first radiator 10 via the first feeder 40 and supplies radio frequency signals to the second radiator 20 via the second feeder 50. In addition, the first feed 31 may further receive, via the first feeder 40, an external mid- to high-band radio frequency signal received by the first radiator 10, and may further receive, via the second feeder 50, an external mid- to high-band radio frequency signal received by the second radiator 20.

[0143] In this case, the third phase shifter 73 is connected to the second feeder 50, and the third phase shifter 73 adjusts the phase of the radio frequency signal supplied by the first feed 31 to the second radiator 20 by 180°. That is, the first radiator 10 and the second radiator 20 receive radio frequency signals with different phases, the phase difference being 180°.

[0144] Figure 17 is a diagram of the return loss coefficient (S11) curve of the antenna 610 in a free state and the efficiency curves of the antenna 610 in different states obtained when the third single-pole single-throw switch 63 in the communication device 1000 shown in Figure 6 is turned on. The S11 curve diagram is obtained by performing a simulation test when the first feed 31 is feeding but the second feed 32 is not feeding.

[0145] In Fig. 17, the abscissa is frequency (unit: GHz), and the ordinate is return loss coefficient and efficiency (unit: dB). From Fig. 17, it can be seen that in a free state, when the third single-pole single-throw switch 63 is turned on, the first radiator 10 and the second radiator 20 are coupled to each other through the first slot 111 and the second slot 112, the electrical lengths of the first radiator 10 and the second radiator 20 are the same, the first radiator 10 and the second radiator 20 operate at the same frequency, the antenna 610 generates a single resonance, the resonance frequency is about 1.9 GHz, and the antenna 610 forms a slot differential mode. At a frequency of 1.9 GHz, the return loss coefficient of the antenna 610 is -14.148 dB.

[0146] When the communication device 1000 is in a free state, the radiation efficiency of the antenna 610 is −1.406 dB at a frequency of 1.9 GHz. Compared with when the switch 60 is turned off, when the third single-pole single-throw switch 63 is turned on, the radiation efficiency of the antenna 610 is improved by 0.7 dB.

[0147] When the communication device 1000 is in the beside head-and-hand state, the radiation efficiency of the antenna 610 is −7.8508 dB at a frequency of 1.9 GHz. Compared with when the communication device 1000 is in the beside head-and-hand state, the radiation efficiency of the antenna 610 when the communication device 1000 is in the beside head-and-hand state decreases by 6.452 dB. Compared with when the switch 60 is turned off, when the third single-pole single-throw switch 63 is turned on, the radiation efficiency of the antenna 610 is improved by about 2 dB.

[0148] FIG. 18 is a diagram of the current distribution at 1.9 GHz obtained when the third single-pole, single-throw switch 63 of the communication device 1000 shown in FIG. 6 is turned on.

[0149] As shown in Fig. 18, the current at the position of the dense arrow is strong, and the current at the position of the sparse arrow is weak. From Fig. 18, it can be seen that the current flows generally along the direction from the second radiator 20 to the first radiator 10, and the antenna 610 forms a slot common mode. The currents near the first radiator 10 and the second radiator 20 are both strong, that is, the currents near the first radiator 10 and the second radiator 20 are evenly distributed, and the first radiator 10 and the second radiator 20 can be fully excited.

[0150] FIG. 19 is the radiation pattern of the antenna 610 at 1.9 GHz obtained when the third single-pole, single-throw switch 63 of the communications device 1000 shown in FIG. 6 is turned on.

[0151] The areas with deeper greyscale shown in Figure 19 represent stronger radiation. The white areas indicate weaker radiation. From Figure 19, it can be seen that when the third single-pole single-throw switch 63 is turned on, the antenna 610 forms a slot common mode at 1.9 GHz.

[0152] Table 1 is a comparison table of bottom body SAR of 5 mm and 0 mm of the communication device 1000 at the same frequency obtained when the antenna 610 shown in Fig. 6 is in two states. It should be understood that the bottom body of the communication device 1000 is the outer surface of the lower frame 110d in the frame 110, i.e., the surface of the lower surface 110d away from the upper frame 110c (see Fig. 1).

[0153] In Table 1, in experimental group 1, the switch 60 is in an open state, and in experimental group 2, the third single-pole single-throw switch 63 is in a closed state. The data shown in Table 1 is data after normalizing the efficiency in the free state with an input power of 24 dBm and a normalized efficiency of -4. It can be seen from Table 1 that the SAR value of the bottom of the communication device 1000 is greatly reduced when the third single-pole single-throw switch 63 is turned on, compared with when the switch 60 is turned off. It can be seen that when the third single-pole single-throw switch 63 is turned on, it is more conducive to optimizing the SAR characteristics of the antenna 610.

[0154] [Table 1]

[0155] In some other embodiments, the switch 60 may alternatively include a single-pole multi-throw switch. In this case, the switch 60 includes a movable end and three non-movable ends. The end of the movable end remote from the non-movable end is connected to the first feed 31, and the ends of the three non-movable ends remote from the movable end are connected to the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73, respectively. When the movable end is switchably connected to a different non-movable end, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 is connected to the second feeder 50 to adjust different phases of the mid-high band radio frequency signal supplied by the first feed 31 to the second feed point 201.

[0156] In the communication device 1000 shown in this embodiment, by controlling the first single-pole single-throw switch 61, the second single-pole single-throw switch 62, and the third single-pole single-throw switch 63 to be on and off, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 can be connected to the second feeder 50, so that the first feed 31 can excite the first radiator 10 separately, or excite the first radiator 10 and the second radiator 20 simultaneously, and the phase difference between the mid-high band radio frequency signals supplied to the first radiator 10 and the second radiator 20 by the first feed 31 can be further adjusted to control the switching of the operation mode of the antenna 610. In addition, the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be changed. This helps to improve antenna efficiency and the beside head-and-hand performance of the antenna, and optimizes the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0157] FIG. 20 is a sixth schematic diagram of a partial structure of the communication device 1000 according to an embodiment of the present application.

[0158] The communication device 1000 of this embodiment differs from the communication device 1000 of the fourth embodiment in that the radio frequency front end 620 includes a phase adjuster 70, and the phase adjuster 70 is disposed on the second feeder 50. The phase adjuster 70 is connected between the switch 60 and the first filter 91, and adjusts the phase of the mid-high band radio frequency signal supplied to the second feeding point 201 by the first feed 31. The phase adjuster 70 has one end connected to the non-movable end 60b of the switch 60 and the other end connected to the first filter 91. For example, the phase adjuster 70 has a plurality of phase adjustment values, for example, 0°, 90°, and 180°.

[0159] When the switch 60 is turned off, the movable end 60a of the switch 60 is not connected to the non-movable end 60b, and the antenna 610 is in the second operating mode. In this case, the first feed 31 can feed the first radiator 10 via the first feeder 40, but cannot feed the second radiator 20 via the second feeder 50. It will be understood that the status of the communication device 1000 in this case is the same as the status of the communication device 1000 obtained when the switch 60 is turned off in the fifth embodiment. The details will not be described again here.

[0160] When the switch 60 is turned on, the movable end 60a of the switch 60 is connected to the non-movable end 60b, and the first feed 31 may simultaneously power the first radiator 10 and the second radiator 20 via the first feeder 40 and the second feeder 50. Specifically, the first feed 31 supplies a radio frequency signal to the first radiator 10 via the first feeder 40, and supplies a radio frequency signal to the second radiator 20 via the second feeder 50.

[0161] In this case, the phase adjuster 70 may be connected to the second feeder 50, and the phase adjuster 70 may adjust the phase of the mid-high band radio frequency signal supplied to the second feed point 201 by the first feed 31. It will be understood that when the phase adjuster 70 adjusts the phase of the mid-high band radio frequency signal supplied to the second radiator 20 by the first feed 31 by 0°, the status of the communication device 100 is the same as the status obtained when the first single-pole single-throw switch 61 is turned on in the fifth embodiment (i.e., when the antenna 610 is in the first operation mode). When the phase adjuster 70 adjusts the phase of the mid-high band radio frequency signal supplied to the second radiator 20 by the first feed 31 by 90°, the status of the communication device 100 is the same as the status obtained when the second single-pole single-throw switch 62 is turned on in the fifth embodiment (i.e., when the antenna 610 is in the second operation mode). When the phase adjuster 70 adjusts the phase of the mid-high band radio frequency signal supplied by the first feed 31 to the second radiator 20 by 180°, the status of the communication device 100 is the same as the status obtained when the third single-pole single-throw switch 63 is turned on in the fifth embodiment (i.e., when the antenna 610 is in the third operation mode), and the details will not be described again here.

[0162] In the communication device 1000 shown in this embodiment, on the premise that the first radiator 10 and the second radiator 20 of the antenna 610 are coupled to each other, by controlling the switch 60 to be on and off, the phase adjuster 70 can be connected to the second feeder 50, so that the first radiator 10 can be excited separately, or the first radiator 10 and the second radiator 20 can be excited simultaneously, and the phase difference between the radio frequency signals supplied to the first radiator 10 and the second radiator 20 by the first feed 31 can be further adjusted to control the switching of the operation mode of the antenna 610. In addition, the current distribution situation of the current near the first radiator 10 and the second radiator 20 can be changed. This helps to improve antenna efficiency and the beside head-and-hand performance of the antenna, and optimizes the specific absorption characteristics of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance in the user's actual usage scenario, and improving the user's usage experience.

[0163] The above description is merely a specific implementation of the present application, and is not intended to limit the scope of protection of the present application. Any variations or replacements that are easily conceived by those skilled in the art within the technical scope disclosed in this application shall fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims. [Explanation of symbols]

[0164] 10 First Radiator 11 First power supply component 12 First Ground Component 13 First Tuning Circuit 14 First Switch 15 First Tuning Element 20 Second Radiator 21 Second power supply component 22 Secondary Grounding Component 23 Second tuning circuit 24 Second Changeover Switch 25 Second Tuning Element 31 First Feed 32 Second Feed 40 First Feeder 50 Second Feeder 60 Switch 60a Movable end 60b Non-moving end 61 First single-pole single-throw switch 62 Second single-pole single-throw switch 63 Third Single-Pole Single-Throw Switch 70 Phase shifter, phase adjuster 71 First Phase Shifter 72 Second Phase Shifter 73 Third Phase Shifter 80 Third Feeder 91 First Filter 92 Second Filter 100 Housing 101 First power supply point 102 First Ground Point 103 First Connection Point 110 Frames 110a Left Frame 110b Right Frame 110c upper frame 110d lower frame 111 First Slot 112 Second Slot 113 Hanging metal parts 120 Rear cover 141 Single-pole, single-throw switch 200 Display 201 Second power supply point 202 Second Grounding Point 241 Single-pole, single-throw switch 300 Speakers 400 Connector 500 card tray 600 Antenna Module 610 Antenna 620 Radio Frequency Front End 1000 Communication Devices 1001 Speaker hole 1002 Insertion hole 1003 Mounting hole 2001 Receiver hole

Claims

1. An antenna comprising a first radiator, a second radiator, a first feed, a first feeder, and a second feeder, the first feed being configured to connect to a radio frequency front end, the first feed being electrically connected to the first radiator via the first feeder and electrically connected to the second radiator via the second feeder; When the antenna is in a first mode of operation, the first feed provides a radio frequency signal to the first radiator and the second radiator, the first radiator and the second radiator receive radio frequency signals of the same frequency, and the first radiator and the second radiator are coupled to each other and configured to generate a first resonance; the antenna further comprises a switch, the switch being disposed on the second feeder and connected between the first feed and the second radiator; When the switch is turned off, the antenna is in a second mode of operation, and the first feed supplies the radio frequency signal to the first radiator, and the first radiator is coupled to the second radiator to excite the second radiator, the antenna.

2. 2. The antenna of claim 1, further comprising a plurality of phase shifters arranged in parallel on the second feeder and connected between the switch and the second radiator, the phase adjustment values ​​of the plurality of phase shifters being different, and the switch being switchably connected to different phase shifters to adjust the phase of the radio frequency signal supplied by the first feed to the second radiator.

3. 3. The antenna of claim 2, wherein there are three phase shifters, one of the phase shifters having a phase adjustment value of 0 degrees, one of the phase shifters having a phase adjustment value of 90 degrees, and one of the phase shifters having a phase adjustment value of 180 degrees.

4. the antenna further comprises a phase shifter, the phase shifter being disposed on the second feeder and connected between the switch and the second radiator; 2. The antenna of claim 1, wherein when the switch is turned on, the phase adjuster adjusts the phase of the radio frequency signal provided by the first feed to the second radiator.

5. 5. The antenna of claim 1, wherein the first feed is configured to provide low-band, mid-band and high-band radio frequency signals, the low-band having a frequency range of 700 MHz to 1000 MHz, the mid-band having a frequency range of 1500 MHz to 2200 MHz and the high-band having a frequency range of 2300 MHz to 2700 MHz.

6. 4. The antenna of claim 1, wherein the first feed is configured to provide radio frequency signals in a first band, the antenna further comprising a second feed and a third feeder, the second feed is configured to connect to the radio frequency front end, the second feed is electrically connected to the second radiator via the third feeder, the second feed is configured to provide radio frequency signals in a second band, the first band is one of a low band and a mid-high band, and the second band is another one of the low band and the mid-high band, the low band having a frequency range of 700 MHz to 1000 MHz, the mid band having a frequency range of 1500 MHz to 2200 MHz, and the high band having a frequency range of 2300 MHz to 2700 MHz.

7. 7. The antenna of claim 6, further comprising a first filter and a second filter, the first filter being disposed on the second feeder and connected between the first feed and the second radiator to filter the radio frequency signals in the second band, and the second filter being disposed on the third feeder and connected between the second feed and the second radiator to filter the radio frequency signals in the first band.

8. 8. The antenna according to claim 1, further comprising a first tuning circuit, one end of the first tuning circuit being grounded and the other end being connected to the first radiator, the first tuning circuit being configured to adjust the electrical length of the first radiator.

9. 9. The antenna of claim 8, wherein the first tuning circuit comprises a plurality of different first tuning elements and a first changeover switch, the plurality of different first tuning elements are all connected to the first radiator, and one end of the first changeover switch is grounded and the other end is switchably connected to the different first tuning elements to adjust the electrical length of the first radiator.

10. 10. The antenna according to claim 1, further comprising a second tuning circuit, one end of the second tuning circuit being grounded and the other end being connected to the second radiator, the second tuning circuit being configured to adjust the electrical length of the second radiator.

11. 11. The antenna of claim 10, wherein the second tuning circuit comprises a plurality of different second tuning elements and a second changeover switch, the plurality of different second tuning elements are all connected to the second radiator, and one end of the second changeover switch is grounded and the other end is switchably connected to the different second tuning elements to adjust the electrical length of the second radiator.

12. A communications device comprising a radio frequency front end and an antenna according to any one of claims 1 to 11, the radio frequency front end being connected to a first feed and configured to supply a radio frequency signal to the antenna and / or receive a radio frequency signal received by the antenna.

13. 13. The communication device of claim 12, wherein the communication device comprises a frame, the frame comprising a first metal segment and a second metal segment spaced apart from one another, the first metal segment forming a first radiator, and the second metal segment forming a second radiator.

14. 13. The communication device of claim 12, wherein the communication device comprises a frame, the frame being made of a non-metallic material, and the first radiator and the second radiator are spaced apart from each other and both positioned relative to the frame.

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