Antenna structure and electronic device

Abstract

The application discloses an antenna structure and an electronic device, and belongs to the technical field of communication. The antenna structure comprises a first antenna with a first antenna radiator, the first antenna radiator comprising a tuning point, a feeding point and a parasitic grounding point of the first antenna, the tuning point, the feeding point and the parasitic grounding point being arranged at intervals; a first section, the first section being connected to the tuning point from the feeding point and being extended, and being used for exciting a first antenna mode of low-frequency resonance of the first antenna; a second section, the second section being extended from the feeding point, and being used for exciting a second antenna mode of high-frequency resonance of the first antenna; a third section, the third section being extended from the feeding point, and the third section being used for exciting a third antenna mode of medium-high-frequency resonance of the first antenna together with the second section; and a fourth section, the fourth section passing through the parasitic grounding point, and being used for exciting a fourth antenna mode of medium-frequency resonance of the first antenna.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to an antenna structure and electronic device. Background Technology

[0002] With the development of mobile communication technology, electronic devices are demanding increasingly higher antenna performance. However, with the design trends of high screen-to-body ratio, large battery capacity, and ultra-thin designs in electronic devices, antenna design and layout space is becoming increasingly limited. How to rationally arrange antenna structures within limited physical space and improve antenna performance has become an urgent problem to be solved. Summary of the Invention

[0003] The purpose of this application is to provide an antenna structure and electronic device that can solve the problem of low antenna performance in existing electronic devices.

[0004] In a first aspect, embodiments of this application provide an antenna structure, including a first antenna having a first antenna radiator, the first antenna radiator comprising:

[0005] The first antenna has a tuning point, a feed point, and a parasitic ground point, which are spaced apart.

[0006] The first segment, which is formed by connecting the feed point to the tuning point and extending therefrom, is used to excite a first antenna mode that generates a low-frequency resonance of the first antenna.

[0007] The second section, which is derived from the feed point, is used to excite the second antenna mode that generates the high-frequency resonance of the first antenna.

[0008] The third section, which is derived from the feed point, is used together with the second section to excite and generate the third antenna mode of high-frequency resonance in the first antenna.

[0009] The fourth segment, which passes through the parasitic grounding point, is used to excite the fourth antenna mode that generates the intermediate frequency resonance of the first antenna.

[0010] Secondly, embodiments of this application provide an electronic device including the antenna structure described in the first aspect above.

[0011] In this embodiment, the antenna structure described above can realize multiple antenna modes corresponding to low-frequency resonance, mid-frequency resonance, mid-high frequency resonance and high-frequency resonance of the first antenna. There are three effective resonances in the entire mid-high frequency band, which greatly broadens the bandwidth of the first antenna and effectively improves the free-state performance of the first antenna in the mid-high frequency range. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the antenna structure according to the first embodiment of this application.

[0013] Figure 2 This is a simulation diagram of the return loss of the antenna structure according to the first embodiment of this application.

[0014] Figure 3 This is a schematic diagram of the current direction corresponding to the resonance of the antenna structure at different frequency bands according to the first embodiment of this application.

[0015] Figure 4 The figure shown is a simulation diagram of the return loss of the first antenna during low-frequency band switching in the first embodiment of this application.

[0016] Figure 5 This is a two-dimensional radiation pattern corresponding to the mid-to-high frequency resonance when the horizontal angle of the antenna structure in the first embodiment of this application is 90 degrees.

[0017] Figure 6 This is a schematic diagram of the antenna structure according to the second embodiment of this application.

[0018] Figures 7(a) and 7(b) are schematic diagrams of the antenna structure of the third embodiment of this application. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The antenna structure and electronic device provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0022] In one embodiment, an antenna structure is provided, comprising a first antenna having a first antenna radiator, the first antenna radiator including: a tuning point, a feed point, and a parasitic ground point of the first antenna, the tuning point, the feed point, and the parasitic ground point being spaced apart; a first segment, the first segment being formed by extending from the feed point to the tuning point, for exciting a first antenna mode that generates low-frequency resonance of the first antenna; a second segment, the second segment being formed by extending from the feed point, for exciting a second antenna mode that generates high-frequency resonance of the first antenna; a third segment, the third segment being formed by extending from the feed point, the third segment being used together with the second segment to exciting a third antenna mode that generates mid-to-high frequency resonance of the first antenna; and a fourth segment, the fourth segment passing through the parasitic ground point, for exciting a fourth antenna mode that generates intermediate-frequency resonance of the first antenna.

[0023] Figure 1 This is a schematic diagram of the antenna structure according to the first embodiment of this application, as shown below. Figure 1 As shown, the antenna structure of the first embodiment of this application includes a first antenna radiator 1 (…). Figure 1 (The area marked by the black dashed line in the middle) and the feed point A, tuning point B, and parasitic grounding point C of the first antenna set on the first antenna radiator 1.

[0024] The antenna structure is located on the electronic device, which also includes a printed circuit board (PCB), a sound chamber (BOX), a universal serial bus (USB), a headphone jack, etc.

[0025] Feed point A is used to connect the first antenna's RF front end. Feed point A includes a matching circuit consisting of a capacitor and an inductor. It can be located between the USB port and the headphone jack, with the specific location depending on the actual PCB size. Tuning point B is the grounding location for the first antenna's high-frequency resonant mode and the low-frequency band switching location. It is located between the USB port and the BOX device. By switching different capacitors and inductors through the low-frequency band switching at tuning point B, the low-frequency band switching of the first antenna can be achieved, such as LTE B28 / B20 / B5 / B8, etc. The grounding location for the high-frequency resonant mode at tuning point B determines the current flow from the corresponding radiator in the high-frequency resonant mode. Parasitic grounding point C is used for grounding, such as the location of the parasitic grounding spring for the first antenna. It can be located near the headphone jack area, placed close to a corner of the electronic device.

[0026] like Figure 1As shown, the segment used to excite the antenna mode that generates the low-frequency resonance of the first antenna is the first segment AD, the segment used to excite the antenna mode that generates the high-frequency resonance of the first antenna is the second segment AH, and the segment used to excite the antenna mode that generates the intermediate-frequency resonance of the first antenna is the fourth segment EF. The fourth segment EF is coupled to the parasitic grounding point C. In this embodiment, a third segment AG is also drawn from the feed point A of the first antenna, which is used to jointly excite the antenna mode that generates the intermediate-high frequency resonance of the first antenna with the second segment AH.

[0027] Optionally, the third segment extends a first electrical length from the feed point, the second segment extends a second electrical length along a first direction from the feed point to the parasitic ground point, and the third segment and the second segment are parallel; the third antenna mode is a half-wavelength antenna mode.

[0028] like Figure 1 As shown, three segments, namely AD, AH, and AG, are drawn from feed point A, with the three segments coinciding only at feed point A. The third segment AG is parallel to the first segment AD, and the branch at the end of the third segment AG is parallel to the second segment AH. However, the end of the third segment AG can be... Figure 1 The antenna can be oriented to the left or to the right, depending on the available space for the electronic device's antenna.

[0029] The ratio of the physical length of the transmission line to the wavelength of the transmitted electromagnetic wave is called the electrical length. The physical length of the first segment AD is the electrical length that can excite the low-frequency resonant band of 700-960MHz, for example, about 40 mm; the physical length of the second segment AH is the electrical length that can excite the high-frequency resonant band of 2300-2700MHz, for example, about 15 mm; and the physical length of the fourth segment EF is the electrical length that can excite the intermediate-frequency resonant band of 1710-2170MHz, for example, about 30 mm.

[0030] In one embodiment, the electrical length corresponding to the sum of the physical length of the third segment AG and the physical length of the second segment AH can enable excitation of the mid-to-high frequency resonant band located in the high-frequency resonant band and between the mid-frequency resonant band.

[0031] The third antenna mode, which generates high-frequency resonance in the first antenna by the joint excitation of the third segment AG and the second segment AH, is the main antenna mode, which is a half-wavelength antenna mode.

[0032] Optionally, the fourth segment includes a first sub-segment and a second sub-segment.

[0033] The first sub-segment extends a third electrical length along a second direction opposite to the first direction, and the second sub-segment extends a fourth electrical length along a direction perpendicular to the second direction. The second sub-segment is arranged parallel to the first sub-segment at a predetermined distance.

[0034] The third segment, the second segment, and the fourth segment together parasitize and excite the fifth antenna mode, which is a quarter-wavelength antenna mode, at the parasitic grounding point.

[0035] like Figure 1 As shown, the fourth segment EF includes a first sub-segment EC and a second sub-segment CF. The first sub-segment CE extends in a direction opposite to the extension direction of the second segment AH, and the second sub-segment CF extends in a direction perpendicular to the first sub-segment CE. The second segment AH is arranged parallel to the first sub-segment CE and is spaced a certain distance apart from it.

[0036] The third segment AG, the second segment AH, and the fourth segment ECF are parasitic at the parasitic grounding point C. That is, the third segment AG and the second segment AH, which jointly excite the main antenna mode of the first antenna to produce mid-to-high frequency resonance, and the fourth segment ECF, which excites the first antenna to produce mid-to-high frequency resonance, are excited at the parasitic grounding point C to produce the antenna auxiliary mode of the first antenna to produce mid-to-high frequency resonance. This antenna auxiliary mode is a quarter-wavelength antenna mode.

[0037] Optionally, the first sub-segment and the second sub-segment are used to jointly excite the sixth antenna mode that generates the intermediate frequency resonance of the first antenna, wherein the sixth antenna mode is a quarter-wavelength antenna mode;

[0038] The second segment AH is coupled to the first sub-segment and excited to generate the seventh antenna mode of the intermediate frequency resonance of the first antenna, wherein the seventh antenna mode is a half-wavelength antenna mode;

[0039] The second section is used to excite the eighth antenna mode that generates the high-frequency resonance of the first antenna, and the eighth antenna mode is a quarter-wavelength antenna mode.

[0040] The fourth segment ECF, comprising the first sub-segment EC and the second sub-segment CF, can also be used to jointly excite and generate the main antenna mode of the first antenna's intermediate frequency resonance. The main antenna mode is a quarter-wavelength antenna mode. That is, the electrical length corresponding to the sum of the physical lengths of the first sub-segment CE and the second sub-segment CF can realize the antenna mode for exciting and generating the first antenna's intermediate frequency resonance.

[0041] In addition, the second segment AH, which is used to excite the antenna main mode that generates the high-frequency resonance of the first antenna, is also coupled with the first sub-segment CE in the fourth segment EF to excite the antenna auxiliary mode that generates the intermediate frequency resonance of the first antenna. The antenna auxiliary mode is a half-wavelength antenna mode.

[0042] The second section AH itself is used to excite the main antenna mode that generates the high-frequency resonance of the first antenna, which is a quarter-wavelength antenna mode.

[0043] Optionally, the first segment includes a third sub-segment and a fourth sub-segment.

[0044] The tuning point is provided with a frequency band switching switch and a grounding position. The third sub-segment extends from the feed point along the second direction for a fifth electrical length to the tuning point. The fourth sub-segment extends from the tuning point along the second direction for a sixth electrical length and then bends perpendicular to the second direction to extend for a seventh electrical length.

[0045] The third sub-segment and the fourth sub-segment are used to jointly excite and generate a quarter-wavelength antenna mode for low-frequency resonance of the first antenna;

[0046] The third sub-segment is used to excite the half-wavelength antenna mode that generates the high-frequency resonance of the first antenna.

[0047] like Figure 1 As shown, the first segment AD includes segment AB extending from the feed point A of the first antenna toward the tuning point B of the first antenna, and segment BD extending from the tuning point B of the first antenna, as follows. Figure 1 As shown, segment BD includes a horizontally extending segment BK and a vertically extending segment KD. The electrical length corresponding to the sum of the physical lengths of segment AB, segment BK, and segment KD can realize the antenna mode that excites and generates the low-frequency resonance of the first antenna.

[0048] As mentioned above, the area where the tuning point B is located is simultaneously equipped with a low-frequency band switching switch for the first segment AD and a high-frequency band grounding position for the second segment AH. Thus, the third sub-segment AB can be used to excite the half-wavelength antenna mode that generates the high-frequency resonance of the first antenna.

[0049] In the above embodiments, the antenna structure described above can realize multiple antenna modes corresponding to low-frequency resonance, mid-frequency resonance, mid-high frequency resonance and high-frequency resonance of the first antenna. There are three effective resonances in the entire mid-high frequency band, which greatly broadens the bandwidth of the first antenna and effectively improves the free space (FS) performance of the first antenna in the mid-high frequency range.

[0050] In addition, the main mode of the mid-to-high frequency resonant antenna is the half-wavelength antenna mode, which is also the balanced mode. This can effectively improve the mid-to-high frequency head-and-hand performance in head-and-hand calling scenarios of mobile devices.

[0051] The end of the first section AD is near the acoustic cavity area of ​​the electronic device, such as... Figure 1 As shown, the end segment KD of the first segment AD used to excite the antenna mode that generates the low-frequency resonance of the first antenna is set on the BOX side, which can make the low-frequency antenna clearance environment of the first antenna better, so that the first antenna can obtain better low-frequency performance.

[0052] In one embodiment, the antenna structure may optionally further include:

[0053] The second antenna, whose feed point is connected to the tuning point, generates a quarter-wavelength antenna mode with low-frequency resonance in the second antenna through the excitation of the fourth sub-segment.

[0054] The second filter circuit is connected in series with the feed point of the second antenna and is used to filter out other frequency components outside the frequency band range corresponding to the low-frequency resonant antenna mode of the second antenna.

[0055] The first filter circuit is connected in series with the feed point of the first antenna and is used to filter out frequency components within the frequency band corresponding to the low-frequency resonant antenna mode in the second antenna.

[0056] In this embodiment, the antenna structure includes a first antenna and a second antenna, wherein the feed point of the second antenna is connected to the location of the tuning point B of the first antenna. Thus, the second antenna can reuse the sub-segment BD included in the first segment AD, thereby generating a quarter-wavelength antenna mode with low-frequency resonance in the second antenna through excitation of the sub-segment BD.

[0057] To avoid interference between the low-frequency resonant antenna modes of the second antenna generated by the sub-segment BD excitation and the resonant antenna modes generated by the corresponding excitations of each segment on the first antenna radiator 1, a second filter circuit can be connected in series between the feed point B of the second antenna and the radio frequency front end of the second antenna. This can filter out other frequency components outside the frequency band corresponding to the low-frequency resonant antenna modes of the second antenna, i.e., only the frequency band corresponding to the low-frequency resonant antenna modes of the second antenna is allowed to pass.

[0058] Similarly, by connecting a first filter circuit in series between the feed point A of the first antenna and the radio frequency front end of the first antenna, frequency components within the frequency band corresponding to the low-frequency resonant antenna mode of the second antenna can be filtered out, that is, only the antenna modes resonating in each frequency band of the first antenna are filtered out.

[0059] The first and second filter circuits mentioned above can be LC circuits combining capacitors and inductors.

[0060] The low-frequency resonance antenna mode of the second antenna corresponds to the B32 band and the GPS L5 band. The specific frequency band can be achieved by adjusting the matching circuit of the second antenna or the physical length of the sub-segment BD.

[0061] It should be noted that, in practical applications, the dimensions of each antenna segment, the routing of the antenna segment layout, the matching network form, and the device values ​​in the embodiments of this application can be adjusted according to the actual situation.

[0062] The working principles of the antenna structure, including the first antenna and the second antenna, are described below:

[0063] First antenna: Power is supplied at feed point A. By setting the first filter circuit in the feed point A area to ground, the resonant frequency band of the second antenna (B32 or GPS L5 band) is effectively filtered out, while allowing all other frequency components within the resonant frequency band of the first antenna to pass through. A switching switch at the tuning point B of the first antenna allows switching between different capacitors and inductors to achieve low-frequency band switching of the first antenna. By coupling the parasitic antenna section EF, full coverage of the low, mid and high frequency bands of the first antenna can be achieved.

[0064] Second antenna: The feed point is set at the tuning point B of the first antenna to serve as the feed point for the second antenna. A second filter circuit is connected in series in the feed point B area of ​​the second antenna to allow all frequency components within the required frequency band of the second antenna to pass through, and to effectively filter out all other frequency components outside the resonant frequency band of the second antenna. This effectively utilizes part of the radiator of the first antenna (BD section) to achieve the B32 or GPS L5 frequency band.

[0065] The feed points of the first and second antennas are designed separately, and they share the same radiator (the second antenna reuses the radiator of the BD section of the first antenna as an effective radiator). Overall, more antennas are arranged in a limited physical space, so that different antenna systems can work at the same time.

[0066] Now for reference Figure 2 , Figure 2 This is a simulation diagram of the return loss of the antenna structure according to the first embodiment of this application.

[0067] like Figure 2 As shown, S11-ant1 (solid black line) is the return loss curve of the first antenna, and S22-ant2 (dotted black line) is the return loss curve of the second antenna. S1,2 (dashed black line) represents the isolation between the first and second antennas. It can be seen that the isolation between the first and second antennas is at least -15dB within the frequency band, which significantly reduces the interference between the first and second antennas.

[0068] refer to Figure 2 and Figure 3 , Figure 2 It also shows the antenna modes of resonance at different frequency bands corresponding to the first and second antennas. Figure 3 This is a schematic diagram of the current direction corresponding to the resonance of the antenna structure at different frequency bands according to the first embodiment of this application.

[0069] As shown in the figure, the low-frequency resonant antenna mode f0 of the first antenna is a 1 / 4 wavelength mode; the corresponding antenna radiator is segment AD, and its current is basically distributed on segment AD, with the current direction shown by the black solid arrow.

[0070] The primary mode of the first antenna's intermediate frequency resonant f1 is the 1 / 4 wavelength mode, and the corresponding antenna radiator is the REF stub, with its current direction indicated by the white solid arrow. Simultaneously, the auxiliary mode of the first antenna's intermediate frequency resonant f1 is the 1 / 2 wavelength mode, and the corresponding antenna radiator is the ACE stub, with its current direction indicated by the black dashed arrow.

[0071] In the first antenna, the primary mode of the high-frequency resonant f2 is the 1 / 2 wavelength mode, and the corresponding antenna radiator is segment GAH, which is a combination of segments AG and AH. The current direction is indicated by the white dashed arrow. Simultaneously, the auxiliary mode is the 1 / 4 wavelength mode, and the corresponding antenna radiator is segment CF. The current direction is indicated by the white dotted arrow.

[0072] The primary mode of the first antenna's high-frequency resonant f3 is the 1 / 4 wavelength mode, with the corresponding antenna radiator being segment AH, and the current direction indicated by the white dashed arrow. Simultaneously, the auxiliary mode of the first antenna's high-frequency resonant f3 is the 1 / 2 wavelength mode, with the corresponding antenna radiator being segment AB, and the current direction indicated by the black dotted arrow.

[0073] The second antenna resonant f4 has a 1 / 4 wavelength mode, and the corresponding antenna radiator is segment BD, with the current direction indicated by the long black dashed arrow.

[0074] Below, for reference Figure 4 , Figure 4 The figure shown is a simulation diagram of return loss when the first antenna switches between different low-frequency bands in the first embodiment of this application.

[0075] like Figure 4 As shown, tuner_1 (black solid line) is the schematic curve of return loss of the first antenna in state B28 when the switch is in state 1; tuner_2 (black dashed line) is the schematic curve of return loss of the first antenna in state B5 when the switch is in state 2; and tuner_3 (gray solid line) is the schematic curve of return loss of the first antenna in state B8 when the switch is in state 3.

[0076] By switching the position of the antenna switch (tuner) at tuning point B, different capacitors and inductors can be switched to achieve low-frequency band switching of the first antenna (LTE B28 / B20 / B5 / B8, etc.).

[0077] As mentioned above, the dominant mode of the high-frequency resonant antenna in the first antenna is the 1 / 2 wavelength mode, i.e., the balanced mode. Most of the signal radiation from the electronic device covers the antenna, and the strongest radiation direction of the electronic device is towards the antenna. Figure 5 This represents the two-dimensional radiation pattern in the f2 resonant mode when the horizontal angle is 90 degrees, i.e., phi = 90°. Therefore, it can be seen that the antenna structure of this embodiment has better mid-to-high frequency head-and-hand performance in user head-and-hand communication scenarios.

[0078] Furthermore, by achieving three effective resonances within the mid-to-high frequency band, and with each of the resonators f1, f2, and f3 possessing both a primary antenna mode and an auxiliary antenna mode, the antenna bandwidth is significantly broadened, effectively improving the free-state performance in the mid-to-high frequency range. As shown in Table 1 below, compared to existing low-frequency resonance schemes, the performance of the head and hand in this application is at least 1.5 dB to 3 dB better in the mid-to-high frequency head and hand scenarios, significantly enhancing the performance of the head and hand in mid-to-high frequency scenarios. Here, FS (Free Space) represents free space, BHHL (Beside Head and Hand Left) represents the left head and hand, and BHHR (Beside Head and Hand Right) represents the right head and hand.

[0079] Table 1

[0080] This application proposal FS-efficiency BHHL - Efficiency BHHR - Efficiency BHHL price drop BHHR decline Head and hands lower forehead B3 -5.24 -10.44 -13.15 5.20 7.91 6.56 B40 -5.64 -10.40 -9.59 4.76 3.94 4.35 B41 -4.25 -10.05 -11.25 5.80 7.01 6.41 Existing technical solutions FS-efficiency BHHL - Efficiency BHHR - Efficiency BHHL price drop BHHR decline Head and hands lower forehead B3 -5.14 -13.87 -15.63 8.73 10.49 9.61 B40 -5.71 -10.96 -11.75 5.25 6.04 5.64 B41 -5.38 -11.46 -12.69 6.08 7.31 6.70

[0081] In one embodiment, the ends of the corresponding segments of the third segment AG, the second segment AH, and the fourth segment ECF are located in the area away from the user's palm when the electronic device is held in landscape mode. This area includes the lower right corner or the upper right corner of the plane where the electronic device is in portrait mode.

[0082] As mentioned above, the fourth segment ECF includes the first sub-segment EC and the second sub-segment CF. The fourth segment ECF corresponds to the end of the segment, namely the end of the first sub-segment EC (E) and the end of the second sub-segment CF (F).

[0083] refer to Figure 6 , Figure 6 This is a schematic diagram of the antenna structure according to the second embodiment of this application. As shown in the figure, the electronic device includes a PCB (black dotted line area), a BOX, a USB port, an earphone jack, and a first antenna radiator 1 (black dashed line area), etc. The antenna structure includes the first antenna radiator 1, a feed point A, a tuning point B, and a parasitic grounding point C.

[0084] This second embodiment is an evolution of the first embodiment of this application, wherein the positions of the BOX device, PCB, and headphone jack are interchanged, and the first antenna radiator 1 is also mirrored. Point A remains the feed point of the first antenna, point B is the high-frequency grounding position of the first antenna or the low-frequency antenna switch position, and also serves as the feed point of the second antenna, and C is the parasitic grounding spring position of the first antenna, located near the headphone jack area, placed in a corner close to the electronic device.

[0085] Compared to the first embodiment, the second embodiment of this application, while ensuring the low-frequency performance of the first antenna, places the corresponding mid-to-high frequency (including intermediate frequency, mid-to-high frequency, and high frequency) segments of the first antenna in... Figure 6 The location shown Figure 6 This is the rear view of the plane where the electronic device's screen is located, which is also the front view corresponding to the side where the battery back cover is located. Therefore, the mid-to-high frequency segment of the first antenna is set at the lower left corner of the rear view of the electronic device's screen, that is, the lower right or upper right corner of the plane where the electronic device's screen is located. This can effectively improve the mid-to-high frequency performance in scenarios where users hold the device in landscape mode.

[0086] In practical applications, the dimensions, antenna pattern routing, matching network configuration, and device values ​​in the embodiments of the present invention can be adjusted according to the actual situation.

[0087] In one embodiment, the second antenna further includes a second antenna radiator, which is disposed in the region where the second antenna is located and coupled to the feed point of the second antenna disposed on the first antenna radiator, for exciting and generating the antenna pattern of the second antenna.

[0088] Figures 7(a) and 7(b) are schematic diagrams of the antenna structure of the third embodiment of this application. As shown in Figures 7(a) and 7(b), the second antenna radiator 2 is set in the second antenna region and is mainly coupled with the second antenna feed point B of the antenna radiator 1 to effectively excite the 1 / 2 wavelength mode of the second antenna radiator 2.

[0089] Optionally, the second antenna radiator is a wire antenna or a slot antenna.

[0090] The antenna radiator 2 shown in Figure 7(a) is a linear antenna, such as the “L”-shaped segment JI shown in the figure. The antenna radiator 2 shown in Figure 7(b) is a slot antenna, such as the “ring” antenna shown in the figure.

[0091] Optionally, the sixth electrical length of the fourth sub-segment is greater than the seventh electrical length of the second antenna radiator; the fourth sub-segment is used to excite and generate a 1 / 4 wavelength antenna mode of the second antenna, and the second antenna radiator is used to excite and generate a 1 / 2 wavelength antenna mode of the second antenna.

[0092] As shown in Figure 7(a), the electrical length from the second antenna feed point B on the first antenna radiator 1 to the end D of the fourth sub-segment is greater than the electrical length from the coupling feed point H of the second antenna radiator 2 to the end I. This results in the longer segment BD being excited by 1 / 4 wavelength and having a lower resonant frequency, while the shorter segment HI of the second antenna radiator 2 is coupled to excite 1 / 2 wavelength resonance and has a higher resonant frequency.

[0093] In addition, the resonance generated by the second antenna radiator 2 is as close as possible to the second antenna resonance of the first antenna radiator 1.

[0094] Optionally, the difference between the resonant center frequency point corresponding to the half-wavelength antenna mode of the second antenna and the resonant center frequency point corresponding to the quarter-wavelength antenna mode of the second antenna is less than 100MHz.

[0095] The interval between the two resonances should be kept within 100MHz to effectively improve the performance of the BD segment corresponding to the second antenna.

[0096] The end of the fourth sub-segment BD is located on the side of the vertical screen of the electronic device, and the second antenna radiator 2 is located at the bottom of the vertical screen of the electronic device.

[0097] The end D of the fourth sub-segment BD corresponding to the second antenna of the first antenna radiator 1 is on the vertical screen side of the electronic device. The fourth sub-segment BD corresponding to the second antenna of the first antenna radiator 1 can generate lateral mode excitation or longitudinal mode excitation.

[0098] Lateral mode excitation mainly refers to the antenna's main radiation area being the bottom section of the electronic device, while longitudinal mode excitation mainly refers to the antenna's main radiation area being the side section of the electronic device. The second antenna radiator 2's section is mainly concentrated at the bottom of the electronic device. Enhancing the lateral mode excitation can assist in enhancing the 1 / 4 wavelength mode excitation of the second antenna of the first antenna radiator 1, effectively widening the bandwidth of the second antenna of the first antenna radiator 1, and simultaneously improving the radiation performance of the second antenna.

[0099] The second antenna radiator 2 can be located on the outer surface of the BOX acoustic cavity, or directly above the feed point B of the second antenna in the Z direction, close to the inner area of ​​the battery back cover. The recommended coupling distance between the second antenna radiator 2 and the feed point B of the second antenna is 0.5mm to 1mm. The second antenna radiator 2 can be implemented using laser direct structuring (LDS) technology or laser manufactured antenna (LMA) technology.

[0100] Furthermore, embodiments of this application also provide an electronic device, including the one described above. Figures 1 to 7(b)The antenna structure described in any of the embodiments.

[0101] Optionally, the end of the first segment is close to the acoustic cavity region of the electronic device.

[0102] Optionally, the ends of the third, second, and fourth segments are located in areas away from the user's palm when the electronic device is held in landscape mode. These areas include the lower right or upper right corner of the plane where the electronic device is held in portrait mode.

[0103] Electronic devices can be terminals or other devices besides terminals. For example, electronic devices can be mobile phones, tablets, laptops, handheld computers, in-vehicle electronic devices, mobile internet devices (MIDs), augmented reality (AR) / virtual reality (VR) devices, robots, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc., and can also be personal computers (PCs), etc. The embodiments of this application do not specifically limit the scope.

[0104] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An antenna structure, characterized by The antenna structure comprises a first antenna having a first antenna radiator, the first antenna radiator comprising: a tuning point, a feed point and a parasitic grounding point of the first antenna, the tuning point, the feed point and the parasitic grounding point being arranged at intervals; a first section connected to the feed point and extending to the tuning point for exciting a first antenna mode of a low frequency resonance of the first antenna; a second section extending from the feed point for exciting a second antenna mode of a high frequency resonance of the first antenna; a third section extending from the feed point, the third section being parallel to the second section, a sum of a physical length of the third section and a physical length of the second section corresponding to an electrical length for jointly exciting a third antenna mode of a medium-high frequency resonance of the first antenna; a fourth section passing through the parasitic grounding point for exciting a fourth antenna mode of a medium frequency resonance of the first antenna.

2. The antenna structure according to claim 1, wherein: the third section extends from the feed point by a first electrical length, and the second section extends along a first direction from the feed point to the parasitic grounding point by a second electrical length; the third antenna mode is a half-wavelength antenna mode.

3. The antenna structure of claim 2, wherein, the fourth section comprises a first sub-section and a second sub-section, the first sub-section extends along a second direction opposite to the first direction by a third electrical length, and the second sub-section extends along a direction perpendicular to the second direction by a fourth electrical length, the second section being arranged in parallel with the first sub-section at a predetermined distance; the third section, the second section and the fourth section jointly parasitize at the parasitic grounding point and excite a fifth antenna mode of a medium-high frequency resonance of the first antenna, the fifth antenna mode being a quarter-wavelength antenna mode.

4. The antenna structure according to claim 3, wherein: the first sub-section and the second sub-section jointly excite a sixth antenna mode of a medium frequency resonance of the first antenna, the sixth antenna mode being a quarter-wavelength antenna mode; the second section AH is coupled with the first sub-section and excites a seventh antenna mode of a medium frequency resonance of the first antenna, the seventh antenna mode being a half-wavelength antenna mode; the second section excites an eighth antenna mode of the high frequency resonance of the first antenna, the eighth antenna mode being a quarter-wavelength antenna mode.

5. The antenna structure of claim 3, wherein, the first section comprises a third sub-section and a fourth sub-section, the tuning point is provided with a frequency band switching switch and a ground position, the third sub-section extends from the feed point along the second direction to the tuning point by a fifth electrical length, and the fourth sub-section extends from the tuning point along the second direction by a sixth electrical length and bends along a direction perpendicular to the second direction by a seventh electrical length; the third sub-section and the fourth sub-section jointly excite a quarter-wavelength antenna mode of a low frequency resonance of the first antenna; the third sub-section excites a half-wavelength antenna mode of a high frequency resonance of the first antenna.

6. The antenna structure of claim 5, wherein, Further comprising: a second antenna, a feed point of the second antenna being connected to the tuning point, the second antenna generating a quarter wavelength antenna mode of a second antenna low frequency resonance through the fourth sub-section; a second filter circuit connected in series with the feed point of the second antenna, for filtering out frequency components outside a frequency band range corresponding to the antenna mode of the second antenna low frequency resonance; a first filter circuit connected in series with the feed point of the first antenna, for filtering out frequency components within the frequency band range corresponding to the antenna mode of the second antenna low frequency resonance.

7. The antenna structure of claim 6, wherein, The second antenna further comprises a second antenna radiator, the second antenna radiator being arranged in the area where the second antenna is located and coupled with the feed point of the second antenna arranged on the first antenna radiator, for exciting the antenna mode of the second antenna.

8. The antenna structure of claim 7, wherein, a sixth electrical length of the fourth sub-section is greater than a seventh electrical length of the second antenna radiator; the fourth sub-section BD is used to excite the quarter wavelength antenna mode of the second antenna, and the second antenna radiator is used to excite the half wavelength antenna mode of the second antenna.

9. The antenna structure of claim 8, wherein, The difference between the resonance center frequency point corresponding to the half wavelength antenna mode of the second antenna and the resonance center frequency point corresponding to the quarter wavelength antenna mode of the second antenna is less than 100 MHz.

10. The antenna structure of claim 7, wherein, The second antenna radiator is a wire antenna or a slot antenna.

11. An electronic device, comprising: An electronic device comprising the antenna structure according to any one of claims 1-10.

12. The electronic device of claim 11, wherein, The end of the first section is close to the sound cavity area of the electronic device.

13. The electronic device of claim 11, wherein, The ends of the corresponding sections of the third section, the second section and the fourth section are arranged in the area away from the palm of the user when the electronic device is held in landscape mode.

14. The electronic device of claim 13, wherein, The area includes the lower right corner or the upper right corner of the plane where the electronic device is held in portrait mode. The area includes the lower right corner or the upper right corner of the plane where the electronic device is held in portrait mode.

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