Antenna and communication equipment

Abstract

The embodiment of the invention provides an antenna and communication equipment. The antenna comprises a first radiator, a second radiator, a first feed source, a first feeder line and a second feeder line. The first feed source is used for being connected with a radio frequency front end, and the first feed source is electrically connected with the first radiator through the first feeder line and electrically connected with the second radiator through the second feeder line. When the antenna is in a first working mode, the first feed source feeds radio frequency signals into the first radiator and the second radiator, the first radiator and the second radiator receive the radio frequency signals with the same phase, and the first radiator and the second radiator are mutually coupled and generate single resonance. According to the antenna provided by the embodiment of the invention, a relatively low SAR value can be obtained, and the influence on a human body is relatively small.

Description

[0001] This application is a divisional application. The application number of the original application is 202110283470.3, and the filing date of the original application is March 16, 2021. The entire content of the original application is incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technologies, and particularly to an antenna and a communication device. Background Art

[0003] With the rapid development of wireless communication technologies, people's dependence on communication devices is increasing. However, when a communication device is close to the human body, the specific absorption rate (SAR) of the antenna's electromagnetic radiation is relatively large, and the electromagnetic power absorbed or consumed by the human body is relatively large, which will have a greater impact on the human body. Summary of the Invention

[0004] This application provides an antenna and a communication device, aiming to improve the antenna design and obtain a lower SAR value.

[0005] In a first aspect, this application provides an antenna, which includes a first radiator, a second radiator, a first feeder, a first feed line, and a second feed line. The first feeder is used to connect to the radio frequency front end. The first feeder is electrically connected to the first radiator through the first feed line and is electrically connected to the second radiator through the second feed line.

[0006] When the antenna is in the first operating mode, the first feeder feeds a radio frequency signal into the first radiator and the second radiator. The first radiator and the second radiator receive radio frequency signals with the same phase. The first radiator and the second radiator are mutually coupled and undergo single resonance. At this time, the current distribution near the first radiator and the second radiator is relatively uniform, and the first radiator and the second radiator can be fully excited, which is beneficial to reducing the SAR value of the antenna, improving the antenna efficiency, and the antenna side head and hand model performance.

[0007] In an implementation, the antenna further includes a switch. The switch is disposed on the second feed line and is connected between the first feeder and the second radiator.

[0008] When the switch is closed, the antenna is in the first operating mode.

[0009] When the switch is open, the antenna is in the second operating mode. The first feeder feeds a radio frequency signal into the first radiator, and the first radiator capacitively couples and excites the second radiator. At this time, the second radiator serves as a parasitic radiator of the first radiator. The current near the first radiator is stronger, and the current near the second radiator is weaker, that is, the current distribution near the first radiator and the second radiator is non-uniform.

[0010] By controlling the opening or closing of the switch, separate excitation of the first radiator or simultaneous excitation of the first and second radiators can be achieved, realizing the switching control between the first working mode and the second working mode of the antenna. Additionally, the current distribution near the first and second radiators can be changed, which is beneficial to improving the antenna efficiency, the head and hand model performance on the antenna side, and optimizing the specific absorption rate characteristics of the antenna.

[0011] In one embodiment, the antenna further includes a plurality of phase shifters. The plurality of phase shifters are connected in parallel to the second feeder and are connected between the switch and the second radiator. The phase adjustment values of the plurality of phase shifters are different, and the switch is switchably connected to different phase shifters to adjust the phase of the radio frequency signal fed from the first feeder to the second radiator.

[0012] By controlling the switching of the switch, phase shifters with different phase adjustment values can be connected to the second feeder, realizing the adjustment of the phase difference of the radio frequency signals fed from the first feeder to the first and second radiators, achieving the switching control of the working mode of the antenna, which is beneficial to improving the antenna efficiency, the head and hand model performance on the antenna side, and optimizing the specific absorption rate characteristics of the antenna.

[0013] In one embodiment, the number of phase shifters is three. The phase adjustment value of one phase shifter is 0 degrees, the phase adjustment value of one phase shifter is 90 degrees, and the phase adjustment value of one phase shifter is 180 degrees.

[0014] In one embodiment, the antenna further includes a phase regulator. The phase regulator is arranged on the second feeder and is connected between the switch and the second radiator.

[0015] When the switch is closed, the phase regulator adjusts the phase of the radio frequency signal fed from the first feeder to the second radiator.

[0016] By controlling the opening or closing of the switch, the phase regulator can be connected to the second feeder, realizing the adjustment of the phase difference of the radio frequency signals fed from the first feeder to the first and second radiators, achieving the switching control of the working mode of the antenna, which is beneficial to improving the antenna efficiency, the head and hand model performance on the antenna side, and optimizing the specific absorption rate characteristics of the antenna.

[0017] In one embodiment, the first feeder is a full-band feeder. That is, the first feeder is a feeder that covers three frequency bands: intermediate frequency, intermediate frequency, and high frequency.

[0018] In one embodiment, the first feeder is a medium-high frequency feeder. The antenna further includes a second feeder and a third feeder. The second feeder is used to connect to the radio frequency front end. The second feeder is electrically connected to the second radiator through the third feeder, and the second feeder is a low-frequency feeder.

[0019] It should be understood that medium and high frequency radio frequency signals have a greater impact on the SAR value of the antenna. Feeding the antenna in a way that separates medium and high frequencies from low frequencies is more conducive to adjusting medium and high frequency radio frequency signals and optimizing the specific absorption rate characteristics of the antenna.

[0020] In one embodiment, the antenna further includes a first filter and a second filter. The first filter is disposed on the second feeder and connected between the first feed source and the second radiator for filtering low frequency radio frequency signals. The second filter is disposed on the third feeder and connected between the second feed source and the second radiator for filtering medium and high frequency radio frequency signals.

[0021] In one embodiment, the antenna further includes a first tuning circuit. One end of the first tuning circuit is grounded and the other end is connected to the first radiator. The first tuning circuit is used 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 frequency bands according to actual needs, enabling the antenna to cover different operating frequency bands.

[0022] In one embodiment, the first tuning circuit includes a plurality of different first tuning elements and a first switching switch. The plurality of different first tuning elements are all connected to the first radiator. One end of the first switching switch is grounded and the other end is switchably connected to different first tuning elements to connect different first tuning elements to the first radiator to adjust the electrical length of the first radiator.

[0023] Among them, the first tuning element is a tuning element such as a capacitor, an inductor or a resistor.

[0024] In one embodiment, the antenna further includes a second tuning circuit. One end of the second tuning circuit is grounded and the other end is connected to the second radiator. The second tuning circuit is used 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 frequency bands according to actual needs, enabling the antenna to cover different operating frequency bands.

[0025] In one embodiment, the second tuning circuit includes a plurality of different second tuning elements and a second switching switch. The plurality of different second tuning elements are all connected to the second radiator. One end of the second switching switch is grounded and the other end is switchably connected to different second tuning elements to connect different second tuning elements to the second radiator to adjust the electrical length of the second radiator.

[0026] Among them, the second tuning element is a tuning element such as a capacitor, an inductor or a resistor.

[0027] In a second aspect, the present application provides a communication device, including a radio frequency front end and any one of the above antennas. The radio frequency front end is connected to the first feed source for feeding a radio frequency signal into the antenna and / or receiving the radio frequency signal received by the antenna.

[0028] In the communication device shown in this application, when the antenna is in the first operating mode, the first feeder feeds radio frequency signals to the first radiator and the second radiator. The first radiator and the second radiator receive radio frequency signals with the same phase. The first radiator and the second radiator are coupled to each other and exhibit single resonance. At this time, the current distribution near the first radiator and the second radiator is relatively uniform, and the first radiator and the second radiator can be fully excited, which is beneficial to reducing the SAR value of the antenna, improving the antenna efficiency and the antenna side head and hand model performance, thereby improving the antenna performance of the communication device, enhancing the wireless performance of the user in the actual usage scenario, and improving the user experience.

[0029] In one implementation, the communication device includes a frame. The frame includes a first metal segment and a second metal segment that are spaced apart from each other. The first metal segment forms the first radiator, and the second metal segment forms the second radiator. That is, part of the frame can serve as the first radiator and the second radiator of the antenna, which can reduce the occupied space of the antenna in the communication device.

[0030] In one implementation, the communication device includes a frame. The frame is made of a non-metallic material. The first radiator and the second radiator are spaced apart from each other and are both disposed adjacent to the frame to reduce the occupied space of the antenna in the communication device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of this application or the background art, the following will describe the drawings required to be used in the embodiments of this application or the background art.

[0032] Figure 1 is a schematic structural diagram of a communication device provided by an embodiment of this application;

[0033] Figure 2 is Figure 1 a partial structural diagram of the shown communication device;

[0034] Figure 3 is a partial structural diagram of a second communication device provided by an embodiment of this application;

[0035] Figure 4 is a partial structural diagram of a third communication device provided by an embodiment of this application;

[0036] Figure 5 is a partial structural diagram of a fourth communication device provided by an embodiment of this application;

[0037] Figure 6 is a partial structural diagram of a fifth communication device provided by an embodiment of this application;

[0038] Figure 7 is Figure 6The curve graph of the echo loss coefficient of the antenna in the free state and the curve graph of the efficiency in different states when the third switch in the shown communication device is open;

[0039] Figure 8 is Figure 6 The schematic diagram of the current distribution when the third switch in the shown communication device is open;

[0040] Figure 9 is Figure 6 The curve graph of the echo loss coefficient of the antenna in the free state and the curve graph of the efficiency in different states when the first single-pole single-throw switch in the shown communication device is closed;

[0041] Figure 10 is Figure 6 The current distribution diagram at 2.2 GHz when the first single-pole single-throw switch in the shown communication device is closed;

[0042] Figure 11 is Figure 6 The radiation pattern of the antenna at 2.2 GHz when the first single-pole single-throw switch in the shown communication device is closed;

[0043] Figure 12 is Figure 6 The curve graph of the echo loss coefficient of the antenna in the free state and the efficiency curve graph when the second single-pole single-throw switch in the shown communication device is closed;

[0044] Figure 13 is Figure 6 The current distribution diagram at 1.8 GHz when the second single-pole single-throw switch in the shown communication device is closed;

[0045] Figure 14 is Figure 6 The current distribution diagram at 2.55 GHz when the second single-pole single-throw switch in the shown communication device is closed;

[0046] Figure 15 is Figure 6 The radiation pattern of the antenna at 1.8 GHz when the second single-pole single-throw switch in the shown communication device is closed;

[0047] Figure 16 is Figure 6 The radiation pattern of the antenna at 1.8 GHz when the second single-pole single-throw switch in the shown communication device is closed;

[0048] Figure 17 is Figure 6 The curve graph of the echo loss coefficient of the antenna in the free state and the curve graph of the efficiency of the antenna in different states when the third single-pole single-throw switch in the shown communication device is closed;

[0049] Figure 18 is Figure 6Current distribution diagram at 1.9 GHz when the third single-pole single-throw switch in the shown communication device is closed;

[0050] Figure 19 is Figure 6 Radiation pattern of the antenna at 1.9 GHz when the third single-pole single-throw switch in the shown communication device is closed;

[0051] Figure 20 It is a partial structural schematic diagram of the sixth communication device provided by an embodiment of the present application. Detailed implementation manners

[0052] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0053] Please refer to Figure 1 , Figure 1 It is a structural schematic diagram of a communication device 1000 provided by an embodiment of the present application.

[0054] The communication device 1000 can be an electronic product with wireless communication functions such as a handheld device, a vehicle-mounted device, a wearable device, a computer device, a wireless local area network (WLAN) device, or a router. In some application scenarios, the communication device 1000 may also be called different names. For example: user equipment, access terminal, user unit, user station, mobile station, mobile phone, remote station, remote terminal, mobile device, user terminal, wireless communication device 1000, user agent or user device, cellular phone, wireless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), terminal device in a 5G network or future evolved network, etc. In the embodiments of the present application, the communication device 1000 is taken as an example of a mobile phone for illustration.

[0055] The communication device 1000 includes a housing 100, a display screen 200, a receiver (not shown in the figure), a speaker 300, a connector 400, and a card slot 500. The display screen 200 is installed on the housing 100, and the receiver, the speaker 300, the connector 400, and the card slot 500 are all installed inside the housing 100.

[0056] The housing 100 may include a frame 110 and a rear cover 120, and the rear cover 120 is fixed 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 also be fixed to each other by an assembly method.

[0057] Among them, the frame 110 includes a left frame 110a and a right frame 110b which are oppositely arranged, and a top frame 110c and a bottom 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 top frame 110c are connected end to end to form a square frame 110. In addition, the frame 110 may have chamfers to increase the aesthetic appearance of the frame 110, and further increase the aesthetic appearance of the communication device 1000.

[0058] The housing 100 is provided with a sound hole 1001, a plug hole 1002 and a mounting hole 1003. In this embodiment, the sound hole 1001, the plug hole 1002 and the mounting hole 1003 are all arranged on the frame 110. Specifically, the sound hole 1001, the plug hole 1002 and the mounting hole 1003 are all arranged on the bottom frame 110d. The number of the sound holes 1001 can be one or more. Exemplarily, the number of the sound holes 1001 is multiple, and each sound hole 1001 communicates with the inside and the outside of the housing 100. The plug hole 1002 and the sound hole 1001 are arranged at intervals from each other, and the mounting hole 1003 is located on the side of the plug hole 1002 away from the sound hole 1001 and is spaced from the plug hole 1002. Among them, both the plug hole 1002 and the mounting hole 1003 communicate with the inside and the outside of the housing 100. It should be noted that the "hole" described in the embodiments of the present application refers to a hole with a complete hole wall, and the same understanding is made for the description of the "hole" hereinafter.

[0059] It should be noted that the orientation words such as "left", "right", "up" and "down" used to describe the communication device 1000 in the embodiments of the present application are mainly described according to the orientation when the user holds the communication device 1000. When the user holds the communication device 1000, the direction facing the top is "top", the direction facing the bottom is "bottom", the direction facing the left is "left", and the direction facing the right is "right". It does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the orientation of the communication device 1000 in the actual application scenario.

[0060] The display screen 200 is fixed to the other side of the frame 110 and is used to display information such as images and videos. That is, the display screen 200 and the rear cover 120 are respectively fixed to both sides of the frame 110. When the user holds the communication device 1000, the display screen 200 faces the user, and the rear cover 120 faces away from the user. The display screen 200 is provided with a receiving hole 2001, and the receiving hole 2001 is a through hole penetrating the display screen 200.

[0061] In some other embodiments, a receiving hole may be formed between the edge of the display screen 200 and the housing 100. For example, a receiving hole 2001 is formed between the edge of the display screen 200 and the top frame 110c. Alternatively, the housing 100 is provided with a receiving hole 2001. For example, the top frame 110c of the housing 100 is provided with a receiving hole 2001. It should be understood that the specific formation structure and position of the receiving hole 2001 are not strictly limited in the embodiments of the present application.

[0062] In this embodiment, the display screen 200 may be a flexible display screen or a rigid display screen. Exemplarily, the display screen 200 may be an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a quantum dot light-emitting diodes (QLED) display screen, or a liquid crystal display (LCD).

[0063] The receiver is located at the top of the communication device 1000, and the sound emitted by the receiver is transmitted to the outside of the communication device 1000 through the receiving hole 2001 to implement the sound playback function of the communication device 1000. The speaker 300, the connector 400, and the card slot 500 are all located at the bottom of the communication device 1000. The sound emitted by the speaker 300 is transmitted to the outside of the communication device 1000 through the speaker hole 1001 to implement the sound playback function of the communication device 1000. The connector 400 corresponds to the insertion hole 1002, and a mating connector (not shown in the figure) can pass through the insertion hole 1002 to be electrically connected to the connector 400 to implement data transmission or charging of the communication device 1000. The card slot 500 is inserted through the mounting hole 1003 and is used to load the SIM card. Wherein, the outer surface of the card slot 500 and the outer surface of the frame 110 may be on the same surface to increase the aesthetic appearance of the communication device 1000.

[0064] Please refer to Figure 2 , Figure 2 is Figure 1 a partial structural schematic diagram of the communication device 1000 shown.

[0065] 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 used to radiate radio frequency signals to the outside or receive radio frequency signals from the outside, so that the communication device 1000 can communicate with the outside through the antenna. Exemplarily, the antenna can 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 is used to feed radio frequency signals to the antenna 610 or receive radio frequency signals from the outside received by the antenna 610. It can be understood that, according to different forms of the antenna 610, the radio frequency front end 620 can selectively feed the antenna 610 in a small impedance feeding manner or a large impedance feeding manner, and the present application does not make specific limitations on this.

[0066] In some embodiments, the radio frequency front end 620 may include a transmitting path and a receiving path (not shown in the figure). The transmitting path may include devices such as a power amplifier and a filter. Devices such as a power amplifier and a filter can perform processing such as power amplification and filtering on the radio frequency signal and transmit it to the antenna 610, and then transmit it to the outside through the antenna 610. The receiving path may include devices such as a low noise amplifier and a filter. Devices such as a low noise amplifier and a filter can perform processing such as low noise amplification and filtering on the radio frequency signal from the outside received by the antenna 610 and transmit it to the radio frequency chip, so that the communication device 1000 can communicate with the outside through the radio frequency front end 620 and the antenna 610.

[0067] The antenna 610 includes a first radiator 10 and a second radiator 20. Specifically, the first radiator 10 and the second radiator 20 can be coupled to each other. It should be noted that the first radiator 10 and the second radiator 20 can be coupled to each other means that when the first radiator 10 is fed with a radio frequency signal, the second radiator 20 can be coupled, and when the second radiator 20 is fed with a radio frequency signal, the first radiator 10 can be coupled. Exemplarily, both the first radiator 10 and the second radiator 20 are in an L shape. It should be understood that the shapes of the first radiator 10 and the second radiator 20 are not limited to Figure 2 the shown L shape, and can also be in a straight shape or other special shapes, and the present application does not make specific limitations on the shapes of the first radiator 10 and the second radiator 20.

[0068] 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 can be made of a metal material, and the frame 110 is grounded. Part of the frame 110 can serve as the first radiator 10, and part of the frame 110 can serve as the second radiator 20 to reduce the space occupied by the antenna 610. Among them, the bottom frame 110d is provided with a first gap 111 and a second gap 112 spaced apart from each other. The first metal segment 110e is located on one side of the first gap 111 away from the second gap 112, and the second metal segment 110f is located on one side of the second gap 112 away from the first gap 111. It can be understood that other parts of the frame 110 except the first metal segment 110e and the second metal segment 110f can also serve as radiators of other antennas (such as WIFI antennas or GPS antennas, etc.) of the communication device 1000. In some other embodiments, the frame 110 can also be provided with one gap or more than three gaps, as long as the first radiator 10 and the second radiator 20 can be coupled to each other.

[0069] In addition, the part of the frame 110 located between the first gap 111 and the second gap 112 forms a floating metal part 113. The first radiator 10 and the second radiator 20 can be coupled to each other through the first gap 111, the floating metal part 113, and the second gap 112. Among them, the widths of the first gap 111 and the second gap 112 are both between 0.5 mm and 0.8 mm. Exemplarily, the first gap 111 and the second gap 112 can be filled with a dielectric material to enhance the electrical isolation effect between the first radiator 10 and the second radiator 20 and other parts of the frame 110.

[0070] In some other embodiments, the frame 110 can also be made of a non-metal material. At this time, the frame 110 cannot serve as the first radiator 10 and the second radiator 20 of the antenna 610. The first radiator 10 and the second radiator 20 can be arranged inside the frame 110. Exemplarily, the first radiator 10 and the second radiator 20 are spaced apart from each other and are arranged close to the frame 110 to reduce the space occupied by the antenna 610. At this time, the first radiator 10 and the second radiator 20 are closer to the outside of the communication device 1000, which is beneficial to improving the signal transmission efficiency of the antenna 610. It should be noted that the statement that the first radiator 10 and the second radiator 20 are arranged close to the frame 110 in this application means that the first radiator 10 and the second radiator 20 can be arranged closely to the frame 110, or can be arranged close to the frame 110, that is, there can be a certain small gap between the first radiator 10 and the second radiator 20 and the frame 110.

[0071] At this time, the frame 110 does not need to be provided with the first gap 111 and the second gap 112 either. The radio frequency signals output or received by the first radiator 10 and the second radiator 20 can pass through the frame 110 for transmission, avoiding the restriction of the frame 110 on the transmission of radio frequency signals. Exemplarily, the form of the antenna 610 can be an antenna form of a flexible printed circuit (FPC), an antenna form of laser-direct-structuring (LDS), a microstrip disk antenna (MDA), or the like.

[0072] The first radiator 10 has a first feeding point 101, a first grounding point 102, and a first connection point 103. The first feeding point 101 is provided at one end of the first radiator 10 close to the first gap 111. The first feeding point 101 is used for electrically connecting to the radio frequency front end 620 to feed the radio frequency signal of the radio frequency front end 620 into the first radiator 10, or to transmit the radio frequency signal received by the first radiator 10 to the radio frequency front end 620. The second grounding point 103 is provided at one end of the first radiator 10 far from the first gap 111 and is grounded. The first connection point 103 is provided at one end of the first feeding point 101 far from the first gap 111 and is close to the first feeding point 101.

[0073] In some embodiments, the antenna 610 further includes a first feeding member 11, a first grounding member 12, and a first tuning circuit 13. Specifically, one end of the first feeding member 11 is connected to the radio frequency front end 620, and the other end is connected to the first radiator 10. Among them, the other end of the first feeding member 11 is connected to the first feeding point 101. That is, the radio frequency front end 620 can be connected to the first feeding point 101 of the first radiator 10 through the first feeding member 11. Exemplarily, the first feeding member 11 can be a feeding elastic sheet or a feeding wire, etc. It should be noted that the first feeding point 101 described in the embodiments of the present application is not an actual existing point, and the position where the first radiator 10 is connected to the first feeding member 11 is the first feeding point 101. In some other embodiments, the antenna 610 may not include the first grounding member 12 either.

[0074] One end of the first grounding member 12 is connected to the first radiator 10, and the other end is grounded. Specifically, one end of the first grounding member 12 is connected to the first connection point 103. That is, the first radiator 10 can be grounded through the first grounding member 12. Exemplarily, the first grounding member 12 can be a grounding elastic sheet or a grounding wire, etc. It should be noted that the first connection point 103 described in the embodiments of the present application is not an actual existing point, and the position of the first radiator 10 where it is connected to the first grounding member 12 is the first connection point 103.

[0075] One end of the first tuning circuit 13 is connected to the first radiator 10, and the other end is grounded, for adjusting the electrical length of the first radiator 10. Wherein, one end of the first tuning circuit 13 is simultaneously connected to the first feeding member 11 and the first grounding member 12. In this embodiment, the first tuning circuit 13 includes a first switching 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 switching switch 14 is grounded, and the other end is switchably connected to different first tuning elements 15 to adjust the electrical length of the first radiator 10. Wherein, the first tuning element 15 can be a device such as a capacitor, an inductor or a resistor.

[0076] Exemplarily, the number of the first tuning elements 15 is four. The first switching 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 member 11 through two different first tuning elements 15, and the other ends of the two single-pole single-throw switches 141 are connected to the first grounding member 12 through the other two first tuning elements 15. By adjusting the state of the first switching switch 14, that is, by controlling the opening or closing of the four single-pole single-throw switches 141, the electrical length of the first radiator 10 can be adjusted, and further the resonant frequency of the first radiator 10 can be changed, so that the first radiator 10 can switch between different operating frequency bands according to actual needs, so that the antenna 610 can cover different operating frequency bands.

[0077] In some other embodiments, the number of the first tuning elements 15 can be two, three or more than five. At this time, the first switching switch 14 can correspondingly include two, three or more than five single-pole single-throw switches, or the first switching switch 14 can be other types of switching switches. For example, it can include physical switches such as single-pole multi-throw switches or multi-pole multi-throw switches, or can be a switchable interface such as a mobile industry processor interface (MIPI) or a general-purpose input / output (GPIO) interface.

[0078] The second radiator 20 has a second feeding point 201 and a second grounding point 202. The second feeding point 201 is arranged at one end of the second radiator 20 close to the second slit 112. The second feeding point 201 is used for electrically connecting to the radio frequency front end 620 to feed the radio frequency signal of the radio frequency front end 620 into the second radiator 20, or for transmitting the radio frequency signal received by the second radiator 20 to the radio frequency front end 620. The second grounding point 202 is arranged at one end of the second radiator 20 far from the second slit 112 and is grounded.

[0079] In some embodiments, the antenna 610 further includes a second feeding member 21, a second grounding member 22, and a second tuning circuit 23. Specifically, one end of the second feeding member 21 is connected to the radio frequency front end 620, and the other end is connected to the second radiator 20. Among them, the other end of the second feeding member 21 is connected to the second feeding point 201. Exemplarily, the second feeding member 21 may be a feeding elastic sheet or a feeding wire and other feeding members. It should be noted that the second feeding point 201 described in the embodiments of the present application is not an actual existing point, and the position where the second radiator 20 is connected to the second feeding member 21 is the second feeding point 201.

[0080] One end of the second grounding member 22 is connected to the second radiator 20, and the other end is grounded. Specifically, one end of the second grounding member 22 is connected to the second grounding point 202. That is, the second radiator 20 can be grounded through the second grounding member 22. Exemplarily, the second grounding member 22 may be a grounding elastic sheet or a grounding wire and other grounding devices. In some other embodiments, the antenna 610 may not include the second grounding member 22, and the second grounding point 202 is directly grounded. It should be noted that the second grounding point 202 described in the embodiments of the present application is not an actual existing point, and the grounding position in the second radiator 20 is the second grounding point 202.

[0081] One end of the second tuning circuit 23 is connected to the second radiator 20, and the other end is grounded, for adjusting the electrical length of the second radiator 20. Among them, one end of the second tuning circuit 23 is connected to the second feeding member 21. In this embodiment, the second tuning circuit 23 includes a second switching 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 switching 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. Among them, the second tuning element 25 may be a capacitor, an inductor, or a resistor and other devices.

[0082] Exemplarily, the number of the second tuning elements 25 is four. The second switching 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 the four single-pole single-throw switches 241 is grounded, and the other end is connected to the second feeding member 21 through different second tuning elements 25. By adjusting the state of the second switching switch 24, that is, by controlling the opening or closing of the four single-pole single-throw switches 241, the electrical length of the second radiator 20 can be adjusted, and then the resonant frequency of the second radiator 20 can be changed, so that the second radiator 20 can switch between different operating frequency bands according to actual needs, so that the antenna 620 can cover different operating frequency bands.

[0083] In some other embodiments, the number of the second tuning elements 25 may be one, two, three, or more than five. In this case, the second switching switch 24 may correspondingly include one, two, three, or more than five single-pole single-throw switches. Alternatively, the second switching switch 24 may be various types of switching switches. For example, it may include physical switches such as single-pole multi-throw switches or multi-pole multi-throw switches, or may be a switchable interface such as a mobile industry processor interface (MIPI) or a general-purpose input / output (GPIO) interface.

[0084] In addition, the antenna 610 may further include a third grounding member (not shown in the figure). One end of the third grounding member is connected to the second radiator 20, and the other end is grounded. At this time, some of the second tuning elements 25 are connected to the second feeding member 21, and some of the second tuning elements 25 are connected to the third grounding member. One end of the second switching 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.

[0085] 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. That is, the first feed 31 is a feed that covers three frequency bands: low band (LB), middle band (MB), and high band (HB). That is, the radio frequency front end 620 feeds the antenna 610 in a common feeding manner. It should be understood that in the embodiments of the present application, the low-frequency band refers to a frequency between 700 MHz and 1000 MHz, the middle-frequency band refers to a frequency between 1500 MHz and 2200 MHz, and the high-frequency band refers to a frequency between 2300 MHz and 2700 MHz.

[0086] The first feeder 40 is electrically connected between the first feed 31 and the first radiator 10. That is, the first feed 31 is electrically connected to the first radiator 10 through the first feeder 40. Among them, the first feeder 40 is electrically connected to the first radiator 10 through the first feeding member 11. At this time, the first feed 31 is electrically connected to the first feeding point 101 through the first feeder 40 and the first feeding member 11. That is, a radio frequency signal can be fed into the first radiator 10 through the first feeder 40 and the first feeding member 11, and the radio frequency signal received by the first radiator 10 from the outside can be received through the first feeder 40 and the first feeding member 11.

[0087] The second feeder 50 is electrically connected between the first feed source 31 and the second radiator 20. That is, the first feed source 31 is electrically connected to the second radiator 20 via the second feeder 50. Among them, the second feeder 50 is electrically connected to the second radiator 20 via the second feeding member 21. At this time, the first feed source 31 can feed a radio frequency signal to the second radiator 20 through the second feeder 50 and the second feeding member 21, and receive the radio frequency signal from the outside received by the second radiator 20 through the second feeder 50 and the second feeding member 21.

[0088] In addition, the antenna 610 further includes a switch 60. The switch 60 is disposed on the second feeder 50 and is connected between the first feed source 31 and the second radiator 20. Among them, the switch 60 is electrically connected to the second radiator 20 via the second feeding member 21. In some other embodiments, the switch 60 can also be disposed on the first feeder 40 and connected between the first feed source 31 and the first radiator 10. Or, 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 source 31 and the first radiator 10, and the other switch 60 is disposed on the second feeder 50 and connected between the first feed source 31 and the second radiator 20.

[0089] Exemplarily, the switch 60 includes a single-pole single-throw switch. The switch 60 includes a movable end 60a and a fixed end 60b. One end of the movable end 60a away from the fixed end 60b is electrically connected to the first feed source 31, and one end of the fixed end 60b away from the movable end 60a is electrically connected to the second feeding member 21. In some other embodiments, one end of the movable end 60a away from the fixed end 60b can also be electrically connected to the second feeding member 21, and one end of the fixed end 60b away from the movable end 60a can also be electrically connected to the first feed source 31.

[0090] When the switch 60 is closed, the movable end 60a is connected to the fixed end 60b, and the antenna 610 is in the first working mode. The first feed source 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed source 31 feeds a radio frequency signal to the first radiator 10 through the first feeder 40, and feeds a radio frequency signal to the second radiator 20 through the second feeder 50. In other words, the first feed source 31 can simultaneously excite the first radiator 10 and the second radiator 20. In addition, the first feed source 31 can also receive the radio frequency signal from the outside received by the first radiator 10 through the first feeder 40, and can also receive the radio frequency signal from the outside received by the second radiator 20 through the second feeder 50. In some other embodiments, the antenna 610 may not include the switch 60. At this time, the antenna 610 is always in the first working mode, and can also reduce the SAR value of the antenna 610 and optimize the specific absorption rate characteristic of the antenna 610.

[0091] Exemplarily, the radio frequency signal of the radio frequency front end 620 can be equally power-divided into two paths by a power divider (not shown in the figure). One radio frequency signal is fed into the first radiator 10 through the first feeder 40, and the other radio frequency signal is fed into the second radiator 20 through the second feeder 50. In some other embodiments, the radio frequency signal of the radio frequency front end 620 can also be unequally power-divided into two paths by a power divider.

[0092] At this time, the first radiator 10 and the second radiator 20 receive radio frequency signals with the same phase (i.e., the phase difference is 0). 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 and exhibit single resonance. The current distributions near the first radiator 10 and the second radiator 20 are relatively uniform. The first radiator 10 and the second radiator 20 can be more fully excited, which is beneficial to reducing the SAR value of the antenna 610, improving the antenna efficiency and the performance of the antenna beside head and hand (BHH) mode.

[0093] When the switch 60 is turned off, the movable end 60a is not connected to the fixed end 60b, and the antenna 610 is in the second operating mode. The first feed source 31 feeds a radio frequency signal into the first radiator 10. Specifically, the first feed source 31 feeds a radio frequency signal into the first radiator 10 through the first feeder 40. In other words, the first feed source 31 can only excite the first radiator 10 and cannot excite the second radiator 20. In addition, the first feed source 31 can also receive the external radio frequency signal received by the first radiator 10 through the first feeder 40.

[0094] At this time, the second radiator 20 serves as a parasitic radiator of the first radiator 10. The first radiator 10 couples and excites the second radiator 20 through the first slot 111 and the second slot 112. The current near the first radiator 10 is stronger, while the current near the second radiator 20 is weaker. That is, the current distributions near the first radiator 10 and the second radiator 20 are not uniform.

[0095] In the communication device 1000 shown in this embodiment, by controlling the opening or closing of the switch 60, the separate excitation of the first radiator 10 or the simultaneous excitation of the first radiator 10 and the second radiator 20 can be realized, the switching control between the first operating mode and the second operating mode of the antenna 610 can be achieved, and the current distribution near the first radiator 10 and the second radiator 20 can also be changed, which is beneficial to improving the antenna efficiency, the performance of the antenna beside head and hand mode, optimizing the specific absorption rate characteristic of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance of the user in the actual use scenario, and improving the user experience.

[0096] Please refer toFigure 3 , Figure 3 It is a partial structural schematic diagram of the second communication device 1000 provided by an embodiment of the present application.

[0097] The difference between the communication device 1000 shown in this embodiment and the communication device 1000 shown in the above embodiment is that the antenna 610 further includes a plurality of phase shifters 70. The plurality of phase shifters 70 are connected in parallel to the second feeder 50 and are connected between the switch 60 and the second radiator 20. The phase adjustment values of the plurality of phase shifters 70 are different, and the switch 60 is switchably connected to different phase shifters 70 to adjust the phase of the radio frequency signal fed from the first feeder 31 into the second radiator 20.

[0098] Exemplarily, the number of phase shifters 70 is three. For ease of understanding, the three phase shifters 70 are respectively named the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73. Specifically, the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all provided on the second feeder 50 and are connected 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 member 21 and are used to change the phase of the radio frequency signal fed from the first feeder 31 into the second radiator 20. It can be understood that in some other embodiments, the number of phase shifters 70 can also be one, two, or more than four phase shifters, and the present application does not make specific limitations thereto.

[0099] Among them, 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 can also be other values, and the present application does not make specific limitations thereto.

[0100] 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 provided on the second feeder 50 and are connected in parallel. Specifically, the movable ends (not labeled in the figure) 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 feeder 31. The fixed end (not labeled in the figure) of the first single-pole single-throw switch 61 is connected to the first phase shifter 71, the fixed end (not labeled in the figure) of the second single-pole single-throw switch 62 is connected to the second phase shifter 72, and the fixed end (not labeled in the figure) of the third single-pole single-throw switch 63 is connected to the third phase shifter 73.

[0101] In some other embodiments, the stationary ends (not labeled in the figures) 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 feeder 31. At this time, the movable end (not labeled in the figure) of the first single-pole single-throw switch 61 may be connected to the first phase shifter 71, the movable end (not labeled in the figure) of the second single-pole single-throw switch 62 may be connected to the second phase shifter 72, and the movable end (not labeled in the figure) of the third single-pole single-throw switch 63 may be connected to the third phase shifter 73.

[0102] When the first single-pole single-throw switch 61 is closed, and the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are both open, the movable end of the first single-pole single-throw switch 61 is connected to the stationary end, and the movable ends of the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are not connected to the stationary end. The antenna 610 is in the first operating mode. The first feeder 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feeder 31 feeds a radio frequency signal to the first radiator 10 through the first feeder line 40 and feeds a radio frequency signal to the second radiator 20 through the second feeder line 50. In addition, the first feeder 31 can also receive the external radio frequency signal received by the first radiator 10 through the first feeder line 40, and can also receive the external radio frequency signal received by the second radiator 20 through the second feeder line 50.

[0103] At this time, the first phase shifter 71 is connected into the second feeder line 50, and the first phase shifter 71 adjusts the phase of the radio frequency signal fed by the first feeder 31 to the second radiator 20 by 0°. That is, the first phase shifter 71 does not adjust the phase of the radio frequency signal fed by the first feeder 31 to the second feed point 201. That is, the phases of the radio frequency signals received by the first radiator 10 and the second radiator 20 are the same, and the phase difference is 0°. It can be understood that the state of the communication device 1000 at this time is the same as the state of the communication device 1000 when the switch 60 is closed in the above embodiment, and will not be described repeatedly here.

[0104] When the switch 60 is open, 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 open, and 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 not connected to the stationary end. The antenna 610 is in the second operating mode. At this time, the first feeder 31 can feed power to the first radiator 10 through the first feeder line 40, but cannot feed power to the second radiator 20 through the second feeder line 50. It can be understood that the state of the communication device 1000 at this time is the same as the state of the communication device 1000 when the switch 60 is open in the above embodiment, and will not be described repeatedly here.

[0105] When the second single-pole single-throw switch 62 is closed, and the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are both open, the movable end of the second single-pole single-throw switch 62 is connected to the fixed end, the movable ends of the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are not connected to the fixed end, and the antenna 610 is in the third operating mode. The first feed source 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed source 31 feeds a radio frequency signal to the first radiator 10 through the first feeder 40 and feeds a radio frequency signal to the second radiator 20 through the second feeder 50. In addition, the first feed source 31 can also receive the external radio frequency signal received by the first radiator 10 through the first feeder 40, and can also receive the external radio frequency signal received by the second radiator 20 through the second feeder 50.

[0106] At this time, the second phase shifter 72 is connected into the second feeder 50, and the second phase shifter 72 adjusts the phase of the radio frequency signal fed by the first feed source 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, and the phase difference is 90°. 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, and the first radiator 10 and the second radiator 20 operate at different frequencies, resulting in double resonance.

[0107] When the third single-pole single-throw switch 63 is closed, and the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are both open, the movable end of the third single-pole single-throw switch 63 is connected to the fixed end, the movable ends of the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are not connected to the fixed end, and the antenna 610 is in the fourth operating mode. The first feed source 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed source 31 feeds a radio frequency signal to the first radiator 10 through the first feeder 40 and feeds a radio frequency signal to the second radiator 20 through the second feeder 50. In addition, the first feed source 31 can also receive the external radio frequency signal received by the first radiator 10 through the first feeder 40, and can also receive the external radio frequency signal received by the second radiator 20 through the second feeder 50.

[0108] At this time, the third phase shifter 73 is connected into the second feeder 50, and the third phase shifter 73 adjusts the phase of the radio frequency signal fed by the first feed source 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, and the phase difference is 180°. 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, and the first radiator 10 and the second radiator 20 operate at the same frequency, resulting in single resonance.

[0109] In some other embodiments, the switch 60 may also include a single-pole multi-throw switch. At this time, the switch 60 includes a movable end and three fixed ends. One end of the movable end away from the fixed ends is connected to the first feeder 31, and one ends of the three fixed ends away from the movable end are respectively connected to the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73. When the movable end is switched to be connected to different fixed ends, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 is connected to the second feeder 50, so as to realize different phase adjustments of the radio frequency signal fed by the first feeder 31 to the second feed point 201.

[0110] In the communication device 1000 shown in this embodiment, by controlling the closing and opening 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, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 can be connected to the second feeder 50. It can not only realize the separate excitation of the first radiator 10 or the simultaneous excitation of the first radiator 10 and the second radiator 20, but also adjust the phase difference of the radio frequency signals fed by the first feeder 31 to the first radiator 10 and the second radiator 20, realize the switching control of the working mode of the antenna 610, and at the same time can change the current distribution near the first radiator 10 and the second radiator 20, which is beneficial to improving the antenna efficiency, the antenna side head and hand model performance, optimizing the specific absorption rate characteristic of the antenna 610, and further improving the antenna performance of the communication device 1000, improving the wireless performance of the user in the actual use scenario, and improving the user experience.

[0111] Please refer to Figure 4 , Figure 4 which is a partial structural schematic diagram of the third communication device 1000 provided by the embodiment of the present application.

[0112] The difference between the communication device 1000 shown in this embodiment and the communication device 1000 shown in the above first embodiment is that the antenna 710 includes a phase regulator 70, and the phase regulator 70 is arranged on the second feeder 50. The phase regulator 70 is connected between the switch 60 and the second radiator 20 and is used to change the phase of the radio frequency signal fed by the first feeder 31 to the second feed point 201. Among them, one end of the phase regulator 70 is connected to the fixed end 60b of the switch 60, and the other end is connected to the second feeding member 21. Exemplarily, there are multiple phase adjustment values of the phase regulator 70, such as 0°, 90°, and 180°.

[0113] When the switch 60 is open, the movable end 60a of the switch 60 is not connected to the fixed end 60b, and the antenna 610 is in the second operating mode. At this time, the first feed source 31 can feed power to the first radiator 10 through the first feeder 40, but cannot feed power to the second radiator 20 through the second feeder 50. It can be understood that the state of the communication device 1000 at this time is the same as the state of the communication device 1000 when the switch 60 is open in the above embodiment, and will not be described again here.

[0114] When the switch 60 is closed, the movable end 60a of the switch 60 is connected to the fixed end 60b, and the first feed source 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feed source 31 feeds a radio frequency signal to the first radiator 10 through the first feeder 40, and feeds a radio frequency signal to the second radiator 20 through the second feeder 50.

[0115] At this time, the phase adjuster 70 is connected into the second feeder 50, and the phase adjuster 70 adjusts the phase of the radio frequency signal fed by the first feed source 31 to the second radiator 20. It can be understood that when the phase adjuster 70 adjusts the phase of the radio frequency signal fed by the first feed source 31 to the second radiator 20 by 0°, the state of the communication device 100 is the same as the state when the first single-pole single-throw switch 61 is closed in the second embodiment above (that is, when the antenna 610 is in the first operating mode). When the phase adjuster 70 adjusts the phase of the radio frequency signal fed by the first feed source 31 to the second radiator 20 by 90°, the state of the communication device 100 is the same as the state when the second single-pole single-throw switch 62 is closed in the second embodiment above (that is, when the antenna 610 is in the second operating mode). When the phase adjuster 70 adjusts the phase of the radio frequency signal fed by the first feed source 31 to the second radiator 20 by 180°, the state of the communication device 100 is the same as the state when the third single-pole single-throw switch 63 is closed in the second embodiment above (that is, when the antenna 610 is in the third operating mode), and will not be described again here.

[0116] In the communication device 1000 shown in this embodiment, by controlling the closing and opening of the switch 60, the phase adjuster 70 can be connected into the second feeder 50, which can not only realize the separate excitation of the first radiator 10 or the simultaneous excitation of the first radiator 10 and the second radiator 20, but also adjust the phase difference of the radio frequency signals fed by the first feed source 31 to the first radiator 10 and the second radiator 20, realize the switching control of the operating mode of the antenna 610, and at the same time can change the current distribution of the current near the first radiator 10 and the second radiator 20, which is beneficial to improving the antenna efficiency, the antenna side head and hand model performance, optimizing the specific absorption rate characteristic of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance of the user in the actual use scenario, and improving the user experience.

[0117] Please refer toFigure 5 , Figure 5 It is a partial structural schematic diagram of the fourth communication device 1000 provided by the embodiments of the present application.

[0118] The difference between the communication device 1000 shown in this embodiment and the communication device 1000 shown in the above first embodiment is that the first feed source 31 is a medium-high frequency feed source (MHB FEED). That is, the first feed source 31 is a feed source that covers two frequency bands of medium frequency and high frequency. The antenna 610 further includes a second feed source 32, a third feeder 80, a first filter 91, and a second filter 92. The second feed source 32 is electrically connected to the radio frequency front end 620. The second feed source 32 is a low frequency feed source (LB FEED). That is, the second feed source 32 is a feed source that covers one frequency band of low frequency. In other words, the radio frequency front end 620 feeds the antenna 610 in a way of separate feeding of low frequency and medium-high frequency. In some other embodiments, the first feed source 31 may also be a low frequency feed source, and the second feed source 32 may also be a medium-high frequency feed source.

[0119] In this embodiment, the first feed source 31 is electrically connected to the first radiator 10 through the first feeder 40, and can feed a medium-high frequency radio frequency signal to the first radiator 10 through the first feeder 40, and receive the medium-high frequency radio frequency signal from the outside received by the first radiator 10 through the first feeder 40. The first feed source 31 is electrically connected to the second radiator 20 through the second feeder 50, and can feed a medium-high frequency radio frequency signal to the second radiator 20 through the second feeder 50, and receive the medium-high frequency radio frequency signal from the outside received by the second radiator 20 through the second feeder 50.

[0120] The third feeder 80 is electrically connected between the second feed source 32 and the second radiator 20. That is, the second feed source 32 is electrically connected to the second radiator 20 through the third feed source 80. Among them, the third feeder 80 is electrically connected to the second radiator 20 through the second feeding member 21. At this time, the second feed source 32 can feed a low frequency radio frequency signal to the second radiator 20 through the third feeder 80 and the second feeding member 21, and receive the low frequency radio frequency signal from the outside received by the second radiator 20 through the third feeder 80 and the second feeding member 21.

[0121] It should be noted that in some other embodiments, the third feeder 80 may also be electrically connected between the second feed source 32 and the first radiator 10. That is, the second feed source 32 is electrically connected to the first radiator 10 through the third feeder 80. Among them, the third feeder 80 is electrically connected to the first radiator 10 through the first feeding member 11. At this time, the second feed source 32 can feed a low frequency radio frequency signal to the first radiator 10 through the third feeder 80 and the first feeding member 11, and receive the low frequency radio frequency signal from the outside received by the first radiator 10 through the third feeder 80 and the first feeding member 11.

[0122] The second filter 92 is disposed on the third feeder 80 and connected between the second feed source 32 and the second radiator 20 to filter out the medium and high frequency radio frequency signals flowing between the second feed source 32 and the second radiator 20. In other words, the second filter 92 is used to allow low frequency radio frequency signals to pass through and block medium and high frequency radio frequency signals from passing through.

[0123] In this embodiment, the second feed source 32 independently excites the second radiator 20. The second feed source 32 can feed the second radiator 20 through the third feeder 80. Specifically, the second feed source 32 can feed a low frequency radio frequency signal into the second radiator 20 through the third feeder 80, and can also receive the low frequency radio frequency signal from the outside received by the second radiator 20 through the third feeder 80. Among them, the second filter 92 can filter out the medium and high frequency radio frequency signals from the outside received by the second radiator 20. At this time, the first radiator 10 can be used as a parasitic radiator of the second radiator 20, and the second radiator 20 can also couple and excite the first radiator 10 through the first gap 111 and the second gap 112.

[0124] The first filter 91 is disposed on the second feeder 50 and connected between the first feed source 31 and the second radiator 20 to filter out the low frequency radio frequency signals flowing between the first feed source 31 and the second feed point 201 of the second radiator 20. In other words, the first filter 91 is used to allow medium and high frequency radio frequency signals to pass through and block low frequency radio frequency signals from passing through. Specifically, the first filter 91 is connected between the switch 60 and the second radiator 20.

[0125] In this embodiment, the switch 60 includes a single pole single throw switch. The switch 60 includes a movable end 60a and a fixed end 60b. One end of the movable end 60a away from the fixed end 60b is electrically connected to the first feed source 31, and one end of the fixed end 60b away from the movable end 60a is electrically connected to the first filter 91. In some other embodiments, one end of the movable end 60a away from the fixed end 60b can also be electrically connected to the first filter 91, and one end of the fixed end 60b away from the movable end 60a can also be electrically connected to the first feed source 31.

[0126] When the switch 60 is closed, the movable end 60a of the switch 60 is connected to the fixed end 60b, and the antenna 610 is in the first operating mode. The first feeder 31 feeds a medium and high frequency radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feeder 31 feeds a medium and high frequency radio frequency signal to the first radiator 10 through the first feeder line 40, and feeds a medium and high frequency radio frequency signal to the second radiator 20 through the second feeder line 50. In other words, the first feeder 31 can simultaneously excite the first radiator 10 and the second radiator 20. In addition, the first feeder 31 can also receive the medium and high frequency radio frequency signals from the outside received by the first radiator 10 through the first feeder line 40, and can also receive the medium and high frequency radio frequency signals from the outside received by the second radiator 20 through the second feeder line 50. At this time, the first filter 91 is connected to the second feeder line 50, and can filter out the low frequency radio frequency signals from the outside received by the second radiator 20.

[0127] Exemplarily, the medium and high frequency radio frequency signals of the radio frequency front end 620 can be equally divided into two paths by a power divider (not shown in the figure), one path of the medium and high frequency radio frequency signal is fed into the first radiator 10 through the first feeder line 40, and the other path of the medium and high frequency radio frequency signal is transmitted to the second radiator 20 through the second feeder line 50. In some other embodiments, the medium and high frequency radio frequency signals of the radio frequency front end 620 can also be unequally divided into two paths by a power divider.

[0128] At this time, the phases of the medium and high frequency 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 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, and single resonance occurs. The current distributions near the first radiator 10 and the second radiator 20 are relatively uniform, the first radiator 10 and the second radiator 20 can be more fully excited, which is beneficial to reducing the SAR value of the antenna 610 and improving the antenna efficiency and the antenna side head and hand model performance.

[0129] It should be noted that the medium and high frequency radio frequency signals have a greater impact on the SAR value of the antenna 610. In this embodiment, the antenna 610 is fed by a method of separate feeding of low frequency and medium and high frequency, which is more beneficial to adjusting the medium and high frequency radio frequency signals and is beneficial to optimizing the specific absorption rate characteristics of the antenna 610.

[0130] When the switch 60 is turned off, the movable end 60a of the switch 60 is not connected to the fixed end 60b, and the antenna 610 is in the second operating mode. The first feeder 31 feeds a medium and high frequency RF signal to the first radiator 10. Specifically, the first feeder 31 feeds a medium and high frequency RF signal to the first radiator 10 through the first feeder line 40. In other words, the first feeder 31 can only excite the first radiator 10 and cannot excite the second radiator 20. In addition, the first feeder 31 can also receive the medium and high frequency RF signals from the outside received by the first radiator 10 through the first feeder line 40.

[0131] At this time, the second radiator 20 serves as a parasitic radiator of the first radiator 10, and the first radiator 10 couples and excites the second radiator 20 through the first slot 111 and the second slot 112. The current near the first radiator 10 is stronger, while the current near the second radiator 20 is weaker. That is, the current distributions near the first radiator 10 and the second radiator 20 are uneven.

[0132] In the communication device 1000 shown in this embodiment, by controlling the opening or closing of the switch 60, the first feeder 31 can be used to separately excite the first radiator 10 or simultaneously excite the first radiator 10 and the second radiator 20, so as to realize the switching control of the operating mode of the antenna 610. At the same time, the current distribution near the first radiator 10 and the second radiator 20 can be changed, which is beneficial to improving the antenna efficiency, the antenna side head and hand model performance, optimizing the specific absorption rate characteristics of the antenna 610, and further improving the antenna performance of the communication device 1000, improving the wireless performance of the user in the actual use scenario, and improving the user experience.

[0133] Please refer to Figure 6 , Figure 6 which is a partial structural schematic diagram of the fifth communication device 1000 provided by the embodiment of the present application.

[0134] The difference between the communication device 1000 shown in this embodiment and the communication device 1000 shown in the above fourth embodiment is that the antenna 610 further includes a plurality of phase shifters 70. The plurality of phase shifters 70 are connected in parallel to the second feeder line 50 and are connected between the switch 60 and the second radiator 20. The phase adjustment values of the plurality of phase shifters 70 are different, and the switch 60 can be switchably connected to different phase shifters 70 to adjust the phase of the RF signal fed by the first feeder 31 to the second radiator 20.

[0135] Exemplarily, the number of phase shifters 70 is three. For ease of understanding, the three phase shifters 70 are respectively named the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73. Specifically, the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73 are all provided 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 member 21, and are used to change the phase of the radio frequency signal fed by the first feeder 31 into the second radiator 20. It can be understood that in some other embodiments, the number of phase shifters 70 can also be one, two, or more than four phase shifters, and the present application does not make specific limitations on this.

[0136] Among them, 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 can also be other values, and the present application does not make specific limitations on this.

[0137] 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 provided on the second feeder 50 and are arranged in parallel. Specifically, the movable ends (not labeled in the figure) 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 feeder 31. The fixed end (not labeled in the figure) of the first single-pole single-throw switch 61 is connected to the first phase shifter 71, the fixed end (not labeled in the figure) of the second single-pole single-throw switch 62 is connected to the second phase shifter 72, and the fixed end (not labeled in the figure) of the third single-pole single-throw switch 63 is connected to the third phase shifter 73.

[0138] In some other embodiments, the fixed ends (not labeled in the figure) 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 can all be connected to the first feeder 31. At this time, the movable end (not labeled in the figure) of the first single-pole single-throw switch 61 can be connected to the first phase shifter 71, the movable end (not labeled in the figure) of the second single-pole single-throw switch 62 can be connected to the second phase shifter 72, and the movable end (not labeled in the figure) of the third single-pole single-throw switch 63 can be connected to the third phase shifter 73.

[0139] 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. 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 not connected to the fixed ends, and the antenna 610 is in the second operating mode. The first feeder 31 feeds a radio frequency signal to the first radiator 10. Specifically, the first feeder 31 feeds a radio frequency signal to the first radiator 10 through the first feeder line 40. In other words, the first feeder 31 can only excite the first radiator 10 and cannot excite the second radiator 20. In addition, the first feeder 31 can also receive the radio frequency signals from the outside received by the first radiator 10 through the first feeder line 40.

[0140] Please refer to Figure 7 , Figure 7 is Figure 6 the curve graph of the return loss coefficient (S11) of the antenna 610 in the free state and the efficiency curve graph in different states when the switch 60 in the communication device 1000 shown is turned off. Among them, the S11 curve graph is obtained through simulation tests when the first feeder 31 is powered and the second feeder 32 is not powered.

[0141] Figure 7 In the curve graph shown, the abscissa is the frequency (unit: GHz), and the ordinate is the return loss coefficient and the efficiency (unit: dB). From Figure 7 it can be seen that in the free state (free space, FS), the antenna 610 generates double resonance, that is, the antenna 610 has two resonance modes. Among them, the resonance frequencies are near 1.9 GHz and 2.2 GHz respectively. When the communication device 1000 is in the free state, at the frequency point of 1.9 GHz, the radiation efficiency of the antenna 610 is -2.1204 dB. When the communication device 1000 is in the side-head-and-hand state (the user holds the communication device 1000 and places it on the side of the head), at the frequency point of 1.9 GHz, the radiation efficiency of the antenna 610 is -9.8664 dB. That is, compared with the free state, when in the side-head-and-hand state, the radiation efficiency of the antenna 610 drops by 7.746 dB.

[0142] Please refer to Figure 8 , Figure 8 is Figure 6 the schematic diagram of the current distribution when the switch 60 in the communication device 1000 shown is turned off.

[0143] Figure 8 The shown is the current distribution diagram at the frequency point of 1.9 GHz. The position where the arrows are dense has a strong current, and the position where the arrows are sparse has a weak current. From Figure 8It can be seen that the current generally flows along the second radiator 20 towards the first radiator 10. The second radiator 20 serves as a parasitic radiator of the first radiator 10, and the first radiator 10 couples and excites the second radiator 20 through the first slot 111 and the second slot 112. The current near the first radiator 10 is strong, while the current near the second radiator 20 is weak. That is, the current distribution near the first radiator 10 and the second radiator 20 is very uneven.

[0144] When the first single-pole single-throw switch 61 is closed, and the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are both open, the movable end of the first single-pole single-throw switch 61 is connected to the fixed end, and the movable ends of the second single-pole single-throw switch 62 and the third single-pole single-throw switch 63 are not connected to the fixed end, and the antenna 610 is in the first working mode. The first feeder 31 feeds a medium-high frequency RF signal to the first radiator 10 and the second radiator 20. Specifically, the first feeder 31 feeds a medium-high frequency RF signal to the first radiator 10 through the first feeder line 40, and feeds a medium-high frequency RF signal to the second radiator 20 through the second feeder line 50. In addition, the first feeder 31 can also receive the external medium-high frequency RF signal received by the first radiator 10 through the first feeder line 40, and can also receive the external medium-high frequency RF signal received by the second radiator 20 through the second feeder line 50.

[0145] At this time, the first phase shifter 71 is connected to the second feeder line 50, and the first phase shifter 71 adjusts the phase of the medium-high frequency RF signal fed by the first feeder 31 to the second radiator 20 by 0°. That is, the first phase shifter 71 does not adjust the phase of the medium-high frequency RF signal fed by the first feeder 31 to the second feed point 201. That is, the phases of the medium-high frequency RF signals received by the first radiator 10 and the second radiator 20 are the same, and the phase difference is 0°.

[0146] Please refer to Figure 9 , Figure 9 is Figure 6 the curve graph of the return loss coefficient (S11) and the efficiency curve graph of the antenna 610 in the free state when the first single-pole single-throw switch 61 in the communication device 1000 shown is closed. Among them, the S11 curve graph is obtained through simulation tests when the first feeder 31 is feeding power and the second feeder 32 is not feeding power.

[0147] Figure 9 In the shown curve graph, the abscissa is the frequency (unit: GHz), and the ordinate is the efficiency and the return loss coefficient (unit: dB). From Figure 9When the first single-pole single-throw switch 61 is closed, 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. The resonance frequency is around 2.2 GHz. At this time, the antenna 610 forms a slot differential mode (slot DM). At the frequency point 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.

[0148] Please refer to Figure 10 , Figure 10 is Figure 6 the current distribution diagram of the communication device 1000 shown when the first single-pole single-throw switch 61 is closed at 2.2 GHz.

[0149] Figure 10 As shown, the current is strong at the positions where the arrows are dense, and the current is weak at the positions where the arrows are sparse. From Figure 10 it can be seen that the current generally flows along the direction from the first radiator 10 and the second radiator 20 approaching each other to moving away from 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 current distributions near the first radiator 10 and the second radiator 20 are relatively uniform. Among them, the maximum current density is 235.515 A / m.

[0150] Please refer to Figure 11 , Figure 11 is Figure 6 the radiation pattern of the antenna 610 at 2.2 GHz when the first single-pole single-throw switch 61 is closed in the communication device 1000 shown.

[0151] Figure 11 As shown, the areas with darker grayscale represent stronger radiation. The white areas represent weaker radiation. From Figure 11 it can be seen that when the first single-pole single-throw switch 61 is closed, the antenna 610 forms a slot differential mode.

[0152] When the second single-pole single-throw switch 62 is closed, and the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are both open, the movable end of the second single-pole single-throw switch 62 is connected to the fixed end, the movable ends of the first single-pole single-throw switch 61 and the third single-pole single-throw switch 63 are not connected to the fixed end, and the antenna 610 is in the third operating mode. The first feeder 31 feeds a medium and high frequency RF signal to the first radiator 10 and the second radiator 20. Specifically, the first feeder 31 feeds a medium and high frequency RF signal to the first radiator 10 through the first feed line 40, and feeds a medium and high frequency RF signal to the second radiator 20 through the second feed line 50. In addition, the first feeder 31 can also receive the medium and high frequency RF signals from the outside received by the first radiator 10 through the first feed line 40, and can also receive the medium and high frequency RF signals from the outside received by the second radiator 20 through the second feed line 50.

[0153] At this time, the second phase shifter 72 is connected into the second feed line 50, and the second phase shifter 72 adjusts the phase of the medium and high frequency RF signal fed by the first feeder 31 to the second radiator 20 by 90°. That is, the first radiator 10 and the second radiator 20 receive medium and high frequency RF signals with different phases, and the phase difference is 90°.

[0154] Please refer to Figure 12 , Figure 12 is Figure 6 the curve graph of the return loss coefficient (S11) and the efficiency curve of the antenna 610 in the free state when the second single-pole single-throw switch 62 in the communication device 1000 shown is closed. Among them, the S11 curve graph is obtained by simulation test when the first feeder 31 feeds power and the second feeder 32 does not feed power.

[0155] Figure 12 The abscissa of [] is frequency (unit: GHz), and the ordinate is the return loss coefficient and efficiency (unit: dB). From Figure 12It can be seen that when the second single-pole single-throw switch 62 is closed, the first radiator 10 and the second radiator 20 are mutually coupled through the first gap 111 and the second gap 112. 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, resulting in double resonance of the first radiator 10 and the second radiator 20, with resonance frequencies near 1.8 GHz and 2.55 GHz. At this time, the antenna 610 forms a slot common mode (slot CM) and a slot differential mode (slot DM). At the frequency point 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 the frequency point 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 in the slot differential mode.

[0156] Please refer to Figure 13 and Figure 14 , Figure 13 is Figure 6 the current distribution diagram of the communication device 1000 shown in Figure 14 is Figure 6 the current distribution diagram of the communication device 1000 shown in

[0157] Figure 13 where the current is strong at the positions where the arrows are dense and weak at the positions where the arrows are sparse. From Figure 13 it can be seen that the current generally flows 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 current distribution near the first radiator 10 and the second radiator 20 is relatively uniform. At this time, the antenna 610 forms a slot common mode.

[0158] Figure 14 where the current is strong at the positions where the arrows are dense and weak at the positions where the arrows are sparse. From Figure 14 it can be seen that the current generally flows along the direction from the first radiator 10 and the second radiator 20 moving away from each other to approaching each other. The currents near the first radiator 10 and the second radiator 20 are both strong, that is, the current distribution near the first radiator 10 and the second radiator 20 is relatively uniform. At this time, the antenna 610 forms a slot differential mode.

[0159] Please refer to Figure 15 and Figure 16 , Figure 15 is Figure 6The radiation pattern of antenna 610 at 1.8 GHz when the second single-pole single-throw switch 62 in the shown communication device 1000 is closed. Figure 16 is Figure 6 The radiation pattern of antenna 610 at 2.55 GHz when the second single-pole single-throw switch 62 in the shown communication device 1000 is closed.

[0160] Figure 15 The regions with darker grayscale represent stronger radiation. The white regions represent weaker radiation. From Figure 15 it can be seen that when the second single-pole single-throw switch 62 is closed, at 1.8 GHz, antenna 610 forms a slot common mode.

[0161] Figure 16 The regions with darker grayscale represent stronger radiation. The white regions represent weaker radiation. From Figure 16 it can be seen that when the second single-pole single-throw switch 62 is closed, at 2.55 GHz, antenna 610 forms a slot differential mode.

[0162] When the third single-pole single-throw switch 63 is closed, and both the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are open, the movable end of the third single-pole single-throw switch 63 is connected to the fixed end, the movable ends of the first single-pole single-throw switch 61 and the second single-pole single-throw switch 62 are not connected to the fixed end, and antenna 610 is in the fourth working mode. The first feeder 31 feeds a radio frequency signal to the first radiator 10 and the second radiator 20. Specifically, the first feeder 31 feeds a radio frequency signal to the first radiator 10 through the first feeder line 40 and feeds a radio frequency signal to the second radiator 20 through the second feeder line 50. In addition, the first feeder 31 can also receive the medium and high frequency radio frequency signals from the outside received by the first radiator 10 through the first feeder line 40, and can also receive the medium and high frequency radio frequency signals from the outside received by the second radiator 20 through the second feeder line 50.

[0163] At this time, the third phase shifter 73 is connected into the second feeder line 50, and the third phase shifter 73 adjusts the phase of the radio frequency signal fed by the first feeder 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, and the phase difference is 180°.

[0164] Please refer to Figure 17 , Figure 17 is Figure 6 The curve graph of the return loss coefficient (S11) of antenna 610 in the free state and the efficiency curve graph in different states when the third single-pole single-throw switch 63 in the shown communication device 1000 is closed. Among them, the S11 curve graph is obtained through simulation testing when the first feeder 31 is powered and the second feeder 32 is not powered.

[0165] Figure 17The abscissa is the frequency (unit: GHz), and the ordinate is the return loss coefficient and efficiency (unit: dB). From Figure 17 It can be seen that in the free state, when the third single-pole single-throw switch 63 is closed, 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, and the antenna 610 generates a single resonance. The resonance frequency is around 1.9 GHz, and the antenna 610 forms a slot differential mode. At the frequency point of 1.9 GHz, the return loss coefficient of the antenna 610 is -14.148 dB.

[0166] When the communication device 1000 is in the free state, at the frequency point of 1.9 GHz, the radiation efficiency of the antenna 610 is -1.406 dB. Compared with when the switch 60 is open, when the third single-pole single-throw switch 63 is closed, the radiation efficiency of the antenna 610 is increased by 0.7 dB.

[0167] When the communication device 1000 is in the side-head-and-hand state, at the frequency point of 1.9 GHz, the radiation efficiency of the antenna 610 is -7.8508 dB. Compared with the side-head-and-hand state, when the communication device 1000 is in the side-head-and-hand state, the radiation efficiency of the antenna 610 is decreased by 6.452 dB. Compared with when the switch 60 is open, when the third single-pole single-throw switch 63 is closed, the radiation efficiency of the antenna 610 is increased by about 2 dB.

[0168] Please refer to Figure 18 , Figure 18 is Figure 6 The current distribution diagram of the communication device 1000 when the third single-pole single-throw switch 63 is closed at 1.9 GHz as shown.

[0169] Figure 18 At the positions where the arrows are dense as shown, the current is strong, and at the positions where the arrows are sparse, the current is weak. From Figure 18 It can be seen that the current generally flows 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 current distributions near the first radiator 10 and the second radiator 20 are relatively uniform, and the first radiator 10 and the second radiator 20 can be fully excited.

[0170] Please refer to Figure 19 , Figure 19 is Figure 6 The radiation pattern of the antenna 610 at 1.9 GHz when the third single-pole single-throw switch 63 is closed in the communication device 1000 as shown.

[0171] Figure 19The areas with darker grayscale represent stronger radiation. The white areas represent weaker radiation. From Figure 19 It can be seen that when the third single-pole single-throw switch 63 is closed, at 1.9 GHz, the antenna 610 forms a slot common mode.

[0172] Please refer to Table 1. Table 1 is Figure 6 a comparison table of the bottom body SAR of the communication device 1000 at 5 mm and 0 mm at the same frequency when the shown antenna 610 is in two states. It should be understood that the bottom surface of the bottom of the communication device 1000 refers to the outer surface of the lower frame 110d in the frame 110, that is, the surface of the lower surface 110d far from the upper frame 110c (see Figure 1 ).

[0173] In Table 1, Experimental Group 1 is in the state where the switch 60 is open, and Experimental Group 2 is in the state where the third single-pole single-throw switch 63 is closed. The data shown in Table 1 are all obtained after normalizing the efficiency in the free state on the premise that the input power is 24 dBm and the normalized efficiency is -4. It can be seen from Table 1 that when the third single-pole single-throw switch 63 is closed, compared with the case where the switch 60 is open, the SAR value at the bottom of the communication device 1000 is significantly reduced. Thus, it can be known that when the third single-pole single-throw switch 63 is closed, it is more beneficial to optimize the SAR characteristics of the antenna 610.

[0174] Table 1 Comparison table of the bottom body SAR values of the communication device at the bottom of the antenna in different states

[0175]

[0176] In some other embodiments, the switch 60 may also include a single-pole multi-throw switch. At this time, the switch 60 includes a movable end and three fixed ends. One end of the movable end far from the fixed ends is connected to the first feeder 31, and one ends of the three fixed ends far from the movable end are respectively connected to the first phase shifter 71, the second phase shifter 72, and the third phase shifter 73. When the movable end is switched to be connected to different fixed ends, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 is connected to the second feeder 50, so as to realize different phase adjustments of the medium and high frequency RF signals fed from the first feeder 31 to the second feed point 201.

[0177] In the communication device 1000 shown in this embodiment, by controlling the closing and opening 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, the first phase shifter 71, the second phase shifter 72, or the third phase shifter 73 can be connected to the second feeder 50. This can not only achieve the separate excitation of the first radiator 10 by the first feed source 31 or the simultaneous excitation of the first radiator 10 and the second radiator 20, but also adjust the phase difference of the medium and high-frequency RF signals fed by the first feed source 31 to the first radiator 10 and the second radiator 20, realize the switching control of the working mode of the antenna 610, and at the same time change the current distribution near the first radiator 10 and the second radiator 20, which is beneficial to improving the antenna efficiency, the antenna side head and hand model performance, optimizing the specific absorption rate characteristic of the antenna 610, thereby improving the antenna performance of the communication device 1000, enhancing the wireless performance of the user in the actual usage scenario, and improving the user experience.

[0178] Please refer to Figure 20 , Figure 20 which is a partial structural schematic diagram of the sixth communication device 1000 provided by the embodiments of the present application.

[0179] The difference between the communication device 1000 shown in this embodiment and the communication device 1000 shown in the above fourth embodiment is that the RF front end 620 includes a phase regulator 70, and the phase regulator 70 is provided on the second feeder 50. The phase regulator 70 is connected between the switch 60 and the first filter 91 to adjust the phase of the medium and high-frequency RF signal fed by the first feed source 31 to the second feed point 201. Wherein, one end of the phase regulator 70 is connected to the fixed end portion 60b of the switch 60, and the other end is connected to the first filter 91. Exemplarily, there are multiple phase adjustment values of the phase regulator 70, such as 0°, 90°, 180°, etc.

[0180] When the switch 60 is open, the movable end portion 60a of the switch 60 is not connected to the fixed end portion 60b, and the antenna 610 is in the second working mode. At this time, the first feed source 31 can feed power to the first radiator 10 through the first feeder 40, but cannot feed power to the second radiator 20 through the second feeder 50. It can be understood that the state of the communication device 1000 at this time is the same as the state of the communication device 1000 when the switch 60 is open in the above fifth embodiment, and will not be repeated here.

[0181] When the switch 60 is closed, the movable end portion 60a of the switch 60 is connected to the fixed end portion 60b, and the first feed source 31 can feed power to the first radiator 10 and the second radiator 20 simultaneously through the first feeder 40 and the second feeder 50. Specifically, the first feed source 31 feeds a radio frequency signal to the first radiator 10 through the first feeder 40 and feeds a radio frequency signal to the second radiator 20 through the second feeder 50.

[0182] At this time, the phase regulator 70 is connected to the second feeder 50, and the phase regulator 70 can adjust the phase of the medium and high frequency radio frequency signal fed from the first feeder 31 to the second feeding point 201. It can be understood that when the phase regulator 70 adjusts the phase of the medium and high frequency radio frequency signal fed from the first feeder 31 to the second radiator 20 by 0°, the state of the communication device 100 is the same as the state when the first single-pole single-throw switch 61 is closed in the above-mentioned fifth embodiment (i.e., when the antenna 610 is in the first working mode). When the phase regulator 70 adjusts the phase of the medium and high frequency radio frequency signal fed from the first feeder 31 to the second radiator 20 by 90°, the state of the communication device 100 is the same as the state when the second single-pole single-throw switch 62 is closed in the above-mentioned fifth embodiment (i.e., when the antenna 610 is in the second working mode). When the phase regulator 70 adjusts the phase of the medium and high frequency radio frequency signal fed from the first feeder 31 to the second radiator 20 by 180°, the state of the communication device 100 is the same as the state when the third single-pole single-throw switch 63 is closed in the above-mentioned fifth embodiment (i.e., when the antenna 610 is in the third working mode), and the description will not be repeated here.

[0183] 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 closing and opening of the switch 60, the phase regulator 70 can be connected to the second feeder 50. It can not only realize the separate excitation of the first radiator 10 or the simultaneous excitation of the first radiator 10 and the second radiator 20, but also adjust the phase difference of the radio frequency signals fed from the first feeder 31 to the first radiator 10 and the second radiator 20, realize the switching control of the working mode of the antenna 610, and at the same time can change the current distribution near the first radiator 10 and the second radiator 20, which is beneficial to improving the antenna efficiency, the antenna side head and hand model performance, optimizing the specific absorption rate characteristic of the antenna 610, thereby improving the antenna performance of the communication device 1000, improving the wireless performance of the user in the actual use scenario, and improving the user experience.

[0184] The above are the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present application.

Claims

1. An antenna, characterized in that, It includes a first radiator, a second radiator, a first feeder, a first feeder line and a second feeder line. The first radiator has a first feeding point, and the second radiator has a second feeding point. The first feeder is used to connect to a radio frequency front end. The first feeder is electrically connected to the first feeding point via the first feeder line and is electrically connected to the second feeding point via the second feeder line; The first feeder is used to feed a radio frequency signal into the first radiator and the second radiator.

2. The antenna according to claim 1, characterized in that, The first feeding point is arranged at one end of the first radiator close to the second radiator, and the second feeding point is arranged at one end of the second radiator close to the first radiator.

3. The antenna according to claim 1 or 2, characterized in that, The antenna further includes a switch. The switch is arranged on the second feeder line and is connected between the first feeder and the second radiator; When the switch is off, the antenna is in a second operating mode. The first feeder feeds a radio frequency signal into the first radiator, and the first radiator capacitively excites the second radiator.

4. The antenna according to claim 3, characterized in that, The antenna further includes a plurality of phase shifters. The plurality of phase shifters are arranged in parallel on the second feeder line and are connected between the switch and the second radiator. The phase adjustment values of the plurality of phase shifters are different. The switch is switchably connected to different phase shifters to adjust the phase of the radio frequency signal fed by the first feeder into the second radiator.

5. The antenna according to claim 4, characterized in that, The number of the phase shifters is three. The phase adjustment value of one phase shifter is 0 degree, the phase adjustment value of one phase shifter is 90 degrees, and the phase adjustment value of one phase shifter is 180 degrees.

6. The antenna according to claim 3, wherein The antenna further includes a phase regulator. The phase regulator is arranged on the second feeder line and is connected between the switch and the second radiator; When the switch is on, the phase regulator adjusts the phase of the radio frequency signal fed by the first feeder into the second radiator.

7. The antenna according to any one of claims 1-6, characterized in that, The first feeder is a full-band feeder.

8. The antenna according to any one of claims 1-5, characterized in that, The first feeder is a medium-high frequency feeder. The antenna further includes a second feeder and a third feeder line. The second feeder is used to connect to the radio frequency front end. The second feeder is electrically connected to the second radiator via the third feeder line. The second feeder is a low-frequency feeder.

9. The antenna according to claim 8, characterized in that The antenna further includes a first filter and a second filter. The first filter is arranged on the second feeder line and is connected between the first feeder and the second radiator to filter low-frequency radio frequency signals. The second filter is arranged on the third feeder line and is connected between the second feeder and the second radiator to filter medium-high frequency radio frequency signals.

10. The antenna according to any one of claims 1-9, characterized in that, The antenna further includes a first tuning circuit. One end of the first tuning circuit is grounded, and the other end is connected to the first radiator. The first tuning circuit is used to adjust the electrical length of the first radiator.

11. The antenna according to claim 10, wherein, The first tuning circuit includes a plurality of different first tuning elements and a first switching switch. The plurality of different first tuning elements are all connected to the first radiator. One end of the first switching switch is grounded, and the other end is switchably connected to different first tuning elements to adjust the electrical length of the first radiator.

12. The antenna according to any one of claims 1-11, characterized in that, The antenna further includes a second tuning circuit. One end of the second tuning circuit is grounded, and the other end is connected to the second radiator. The second tuning circuit is used to adjust the electrical length of the second radiator.

13. The antenna according to claim 12, characterized in that, The second tuning circuit includes a plurality of different second tuning elements and a second switching switch. The plurality of different second tuning elements are all connected to the second radiator. One end of the second switching switch is grounded, and the other end is switchably connected to different second tuning elements to adjust the electrical length of the second radiator.

14. A communication device, characterized in that, It includes a radio frequency front end and the antenna according to any one of claims 1-13. The radio frequency front end is connected to the first feeder for feeding a radio frequency signal into the antenna and / or receiving the radio frequency signal received by the antenna.

15. The communication device according to claim 14, characterized in that, 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 the first radiator, and the second metal segment forms the second radiator.

16. The communication device according to claim 14, characterized in that, The communication device includes a frame. The frame is made of a non-metallic material. The first radiator and the second radiator are spaced apart from each other and are both disposed against the frame.

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