A mobile terminal

Abstract

The invention discloses a mobile terminal, which comprises a first antenna, a second antenna and a third antenna, which are respectively a low-frequency diversity antenna, a medium-high frequency MIMO main antenna and a medium-high frequency MIMO diversity antenna. The first antenna comprises a first metal frame segment, the second antenna comprises a second metal frame segment, the third antenna comprises a third metal frame segment, a fourth metal frame segment and a fifth metal frame segment. The first antenna and the second antenna support different frequency bands, and a first notch is arranged between the metal frame segments of the two. The isolation between the first antenna and the second antenna is good. Notches are arranged between the third metal frame segment, the fourth metal frame segment and the fifth metal frame segment of the third antenna, and a fourth grounding point is between the grounding point of the second antenna and the feeding point of the third antenna. A distance is left between the grounding points of the second and third antennas, and the isolation is also good. The invention can achieve the effect of ensuring the performance of the medium-high frequency MIMO antenna.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a mobile terminal. Background Art

[0002] 5G (fifth-generation wireless communication technology) has been used for commercial purposes, and more and more mobile phones support 5G. Compared with 4G mobile phones, the number of medium and high frequency antennas of 5G mobile phones has increased from 2 to 4, and 4 new ultra-high frequency antennas have been added. However, the overall size of the mobile phone is limited, and the antenna clearance is further reduced, which means that the radiation space of the antenna is getting worse and worse. That is, 5G mobile phones need to deploy more antennas in a worse radiation space. The existing mobile phone antenna design solutions on the market often sacrifice the performance of MIMO antennas for medium and high frequency bands.

[0003] Therefore, the prior art still needs to be improved and enhanced. Summary of the invention

[0004] The object of the present invention is to provide a mobile terminal, aiming to solve the problem of poor performance of MIMO antennas in medium and high frequency bands in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a mobile terminal, the mobile terminal comprising:

[0007] A first antenna, wherein the first antenna is a low-frequency diversity antenna, and the first antenna comprises a first metal frame segment, and a first feeding point and a first grounding point electrically connected to the first metal frame segment respectively;

[0008] a second antenna, the second antenna being a medium-high frequency MIMO main antenna, the second antenna comprising a second metal frame segment, and a second feeding point and a second grounding point electrically connected to the second metal frame segment, respectively, and a first gap being provided between the first metal frame segment and the second metal frame segment;

[0009] The third antenna is a medium-high frequency MIMO diversity antenna, and the third antenna includes a third metal frame segment, a fourth metal frame segment and a fifth metal frame segment, the fifth metal frame segment is connected to the second metal frame segment, a second notch is provided between the third metal frame segment and the fourth metal frame segment, a third notch is provided between the third metal frame segment and the fifth metal frame segment, the third metal frame segment is electrically connected to a third feeding point, an end of the fourth metal frame segment away from the third metal frame segment is electrically connected to a third grounding point, an end of the fifth metal frame segment away from the third metal frame segment is electrically connected to a fourth grounding point, and the fourth grounding point is between the second grounding point and the third feeding point.

[0010] The mobile terminal, wherein the first metal frame segment includes a first straight portion and a first curved portion, and the first feeding point and the first grounding point are between the first straight portion and the first curved portion.

[0011] The mobile terminal, wherein the mobile terminal also includes a fourth antenna, the fourth antenna is an intermediate frequency main set and ultra-high frequency diversity antenna, the fourth antenna includes a sixth metal frame segment, a seventh metal frame segment, a fourth feeding point, a fifth grounding point and a sixth grounding point, a fourth gap is provided between the sixth metal frame segment and the seventh metal frame segment, an end of the sixth metal frame segment away from the fourth gap is electrically connected to the fifth grounding point, the fourth feeding point is between the fifth grounding point and the fourth gap, and an end of the seventh metal frame segment away from the fourth gap is electrically connected to the sixth grounding point.

[0012] The mobile terminal, wherein the mobile terminal also includes a fifth antenna, the fifth antenna is a low-frequency main antenna, the fifth antenna includes an eighth metal frame segment, a fifth feed point and the fifth grounding point, the eighth metal frame segment includes a second straight line portion and a second curved line portion, the second straight line portion and the second curved line portion are connected, the fifth feed point is electrically connected to the connection point of the second straight line portion and the second curved line portion, and the end of the second straight line portion away from the fifth feed point is electrically connected to the fifth grounding point.

[0013] The mobile terminal, wherein the mobile terminal also includes a sixth antenna, the sixth antenna is a medium-high frequency diversity antenna, the sixth antenna includes a ninth metal frame segment, a sixth feeding point and a seventh grounding point, a fifth notch is provided between the ninth metal frame segment and the eighth metal frame segment, and an end of the ninth metal frame segment close to the fifth notch is electrically connected to the seventh grounding point.

[0014] The mobile terminal further comprises a seventh antenna, which is an ultra-high frequency MIMO diversity antenna. The seventh antenna comprises a tenth metal frame segment, and a seventh feeding point and an eighth grounding point which are respectively electrically connected to the tenth metal frame segment. A sixth gap is provided between the tenth metal frame segment and the ninth metal frame segment.

[0015] The mobile terminal, wherein the mobile terminal also includes an eighth antenna, the eighth antenna is an ultra-high frequency MIMO main antenna, the eighth antenna includes an eleventh metal frame segment, an eighth feeding point and a ninth grounding point, a seventh notch is provided between the eleventh metal frame segment and the tenth metal frame segment, and the end of the eleventh metal frame segment away from the tenth metal frame segment is electrically connected to the ninth grounding point.

[0016] The mobile terminal, wherein the mobile terminal also includes a ninth antenna, the ninth antenna is a high frequency and ultra-high frequency main antenna, the ninth antenna includes a twelfth metal frame segment, a thirteenth metal frame segment, a ninth feeding point, a tenth grounding point and an eleventh grounding point, an eighth gap is provided between the twelfth metal frame segment and the thirteenth metal frame segment, the twelfth metal frame segment and the tenth grounding point are electrically connected, the thirteenth metal frame segment and the eleventh grounding point are electrically connected, the ninth feeding point is between the tenth grounding point and the eleventh grounding point, and a ninth gap is provided between the thirteenth metal frame segment and the first metal frame segment.

[0017] The mobile terminal, wherein the mobile terminal also includes a tenth antenna, the tenth antenna is the first antenna of WIFI2.4G and WIFI 5G, the tenth antenna includes a fourteenth metal frame segment, a tenth feeding point and a twelfth grounding point, one end of the fourteenth metal frame segment is electrically connected to the tenth feeding point, and the other end is electrically connected to the twelfth grounding point, the seventh notch is between the fourteenth metal frame segment and the eleventh metal frame segment, and a tenth notch is set between the fourteenth metal frame segment and the tenth metal frame segment.

[0018] The mobile terminal, wherein the mobile terminal also includes an eleventh antenna, the eleventh antenna is a second antenna for WIFI2.4G and WIFI 5G, the eleventh antenna includes a fifteenth metal frame segment, an eleventh feeding point and a thirteenth grounding point, one end of the fifteenth metal frame segment is electrically connected to the eleventh feeding point, and the other end is electrically connected to the thirteenth grounding point, the fifteenth metal frame segment is connected to the twelfth metal frame segment, a fourteenth grounding point is arranged between the thirteenth grounding point and the tenth grounding point, and an eleventh notch is arranged between the fifteenth metal frame segment and the eleventh metal frame segment.

[0019] Compared with the prior art, the embodiments of the present invention have the following advantages:

[0020] Compared with the prior art, the present invention provides a mobile terminal. The mobile terminal provided by the present invention includes a first antenna, a second antenna and a third antenna, which are respectively a low-frequency diversity antenna, a medium-high frequency MIMO main antenna and a medium-high frequency MIMO diversity antenna. The first antenna includes a first metal frame segment, the second antenna includes a second metal frame segment, the third antenna includes a third metal frame segment, a fourth metal frame segment and a fifth metal frame segment. The first antenna and the second antenna support different frequency bands, and a first notch is provided between the metal frame segments of the two. The isolation between the first antenna and the second antenna is good. The second antenna and the third antenna support the same frequency band. Notches are provided between the third metal frame segment, the fourth metal frame segment and the fifth metal frame segment of the third antenna, and a fourth grounding point connected to the fifth metal frame segment is between the grounding point of the second antenna and the feeding point of the third antenna. A distance is left between the grounding points of the two, and the isolation is also very good. The present invention can achieve the effect of ensuring the performance of the medium-high frequency MIMO antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of an embodiment of a mobile terminal provided by the present invention;

[0023] Figure 2 A schematic diagram of the antenna layout on the upper part of the mobile terminal in an embodiment of the mobile terminal provided by the present invention;

[0024] Figure 3 A schematic diagram of the overall antenna layout of an embodiment of a mobile terminal provided by the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0027] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0028] In 5G mobile phones, the low-frequency band requires two antennas, namely, the low-frequency main antenna and the low-frequency diversity antenna. The medium-frequency, high-frequency and ultra-high-frequency bands require four antennas, namely, the main antenna, the diversity antenna, the MIMO main antenna and the MIMO diversity antenna.

[0029] Embodiment 1

[0030] The present invention provides a mobile terminal, wherein the mobile terminal has a metal frame, such as Figure 1As shown, the mobile terminal includes a first antenna 100, and the first antenna 100 includes a first metal frame segment 001, and a first feed point 201 and a first ground point 301 electrically connected to the first metal frame segment 001 respectively. The first antenna 100 is a low-frequency diversity antenna, and the first antenna 100 resonates in a low-frequency band through the first metal frame segment 001. The frequency range of the low-frequency (LB, Low Band) band is 617-960MHz. The first antenna 100 is a hybrid antenna, which is a hybrid antenna that integrates IFA (Inverted FAntenna, inverted F antenna) and Loop (loop antenna). Specifically, the first metal frame segment 001 includes a first straight portion 0011 and a first curved portion 0012, the first feeding point 201 and the first grounding point 301 are between the first straight portion 0011 and the first curved portion 0012, the first feeding point 201, the first grounding point 301 and the first straight portion 0011 form an IFA antenna, the first feeding point 201, the first grounding point 301 and the first curved portion 0012 form a Loop antenna, the first antenna 100 also includes a first antenna switch 501, and the first antenna switch 501 is associated with different inductors or capacitors to switch different low-frequency bands, thereby achieving full coverage of 617-960MHz. The first antenna 100 only supports low frequency, and does not support medium frequency, high frequency, ultra-high frequency and other frequency bands, which greatly reduces the workload of configuring the antenna switch logic, and also improves the performance of CA (Carrier Aggregation).

[0031] In a possible implementation, the longitudinal distance between the first grounding point 301 and the first feeding point 201 is 7 mm, the longitudinal distance between the first feeding point 201 and the first curved portion 0012 is 12 mm, the transverse distance between the first feeding point 201 and the first antenna switch 501 is 33 mm, the end of the first straight portion 0011 away from the first curved portion 0012 is not connected to other metal frame segments, but has a gap, and the longitudinal distance between the end of the first straight portion 0011 and the first grounding point 301 is 42 mm. Those skilled in the art can understand that the above distances can be adjusted according to the actual external dimensions of the mobile terminal.

[0032] The free space efficiency of the first antenna 100 has a peak value of -6.5 dB at low frequency.

[0033] The mobile terminal further includes a second antenna 200, and the second antenna 200 includes a second metal frame segment 002, and a second feed point 202 and a second ground point 302 respectively electrically connected to the second metal frame segment 002. The antenna type of the second antenna 200 is an IFA antenna, and the second antenna 200 is a medium-high frequency MIMO main antenna. The second antenna 200 resonates at medium-high frequencies, and the frequency range of the medium frequency (MB, Middle Band) is 1710-2200MHz, and the frequency range of the high frequency (HB, HighBand) is 2300-2690MHz. A first gap 401 is provided between the first metal frame segment 001 and the second metal frame segment 002, and the first gap 401 can be filled with plastic. The first antenna 100 and the second antenna 200 support different frequency bands, and the first gap 401 is provided between the first metal frame segment 001 and the second metal frame segment 002, so that the first antenna 100 and the second antenna 200 have good isolation, and the performance of the second antenna 100 and the second antenna 200 will not affect each other.

[0034] The distance between the second feed point 202 and the end of the second metal frame segment 002 (the end close to the first notch 401) is 11 mm, the distance between the second feed point 202 and the second grounding point 302 is 12 mm, and the width of the first notch 401 can be set to 20 mm. It can be understood that the wider the width of the first notch 401, the better the isolation between the first antenna 100 and the second antenna 200, but it will occupy more space and squeeze the layout space of other antennas. The inventor has experimentally determined that the effect of setting the width of the first notch 401 to 20 mm can achieve a better balance between isolation and space.

[0035] The average free-space efficiency of the second antenna at both the intermediate frequency and the high frequency is -5dB. The second antenna also has very good head-hand performance, and the efficiency of the left and right head-hand modes is only 6dB lower than the free-space efficiency.

[0036] like Figure 1As shown, the mobile terminal provided in this embodiment further includes a third antenna 300, and the third antenna 300 includes a third metal frame segment 003, a fourth metal frame segment 004, a fifth metal frame segment 005, a third feeding point 203, and a third grounding point 303 and a fourth grounding point 304. The third metal frame segment 003 is between the fourth metal frame segment 004 and the fifth metal frame segment 005, and a second notch 402 is provided between the third metal frame segment 003 and the fourth metal frame segment 004, and a third notch 403 is provided between the third metal frame segment 003 and the fifth metal frame segment 005, and the third metal frame segment 003 is electrically connected to the third feeding point 203. One end of the fourth metal frame segment 004 away from the third metal frame segment 003 is electrically connected to the third grounding point 303, and one end of the fifth metal frame segment 005 away from the third metal frame segment 003 is electrically connected to the fourth grounding point 304. The fifth metal frame segment 005 is connected to the second metal frame segment 002, and the fourth grounding point 304 is between the second grounding point 302 and the third feed point 203. The third antenna 300 is a medium-high frequency MIMO diversity antenna, and the type of the third antenna 300 is a parasitic antenna. The third feed point 203 is directly connected to the third metal frame segment 003, and the third metal frame segment 003 is coupled with the fourth metal frame segment 004 to generate a high-frequency resonance. The third metal frame segment 003 is coupled with the fifth metal frame segment 005 to generate an intermediate frequency resonance. The third antenna 300 and the second antenna 200 support the same frequency band. In order to strengthen the isolation of the two antennas, a distance is left between the fourth grounding point 304 and the second grounding point 302. The adjacent part of the third antenna 003 and the second antenna 002 is provided with two grounding points, and the two grounding points are separated, which can improve the isolation between the second antenna 002 and the third antenna 003.

[0037] The free space average efficiency of the third antenna at both the intermediate frequency and the high frequency is -6 dB.

[0038] In one possible implementation, the length of the third metal frame segment 003 is 3 mm, the lengths of the second notch 402 and the third notch 403 are both 1.5 mm, the length of the fourth metal frame segment 004 is 9 mm, the length of the fifth metal frame segment 005 is 21 mm, and the distance between the fourth grounding point 304 and the second grounding point 302 is 10 mm.

[0039] The first antenna, the second antenna and the third antenna may be arranged at the bottom of the mobile terminal. Figure 2As shown, more antennas can be arranged on the upper part of the mobile terminal. Specifically, the mobile terminal provided in this embodiment also includes a fourth antenna 400, and the fourth antenna 400 includes a sixth metal frame segment 006, a seventh metal frame segment 007, a fourth feed point 204, a fifth grounding point 305 and a sixth grounding point 306. A fourth notch 404 is provided between the sixth metal frame segment 006 and the seventh metal frame segment 007, and the end of the sixth metal frame segment 006 away from the fourth notch 404 is electrically connected to the fifth grounding point 305, the fourth feed point 204 is between the fifth grounding point 305 and the fourth notch 404, and the end of the seventh metal frame segment 007 away from the fourth notch 404 is electrically connected to the sixth grounding point 306. The fourth antenna is an intermediate frequency main set and ultra-high frequency diversity antenna, and the frequency range of ultra-high frequency (UHB, Ultra High Band) is 3300-4200MHz. The type of the fourth antenna is a hybrid antenna of an IFA antenna and a parasitic antenna. The IFA antenna with the sixth metal frame segment 006 as the main body generates intermediate frequency resonance, and the parasitic antenna with the seventh metal frame segment 007 as the main body couples out ultra-high frequency resonance.

[0040] In a possible implementation, the length of the sixth metal frame segment 006 is 22.5 mm, the distance between the fourth feeding point 204 and the fifth grounding point 305 is 7 mm, and the length of the seventh metal frame segment 007 is 7 mm.

[0041] The average free-space efficiency of the fourth antenna at the intermediate frequency is -5dB, and the average free-space efficiency at the ultra-high frequency is -6dB.

[0042] The sixth grounding point 306 of the fourth antenna is adjacent to the fourth grounding point 304 of the third antenna and may be connected via a metal frame. Since there is a distance between the grounding points of the two antennas, better isolation can be achieved.

[0043] The mobile terminal provided in this embodiment further includes a fifth antenna 500, the fifth antenna 500 includes an eighth metal frame segment 008, a fifth feed point 205 and the fifth grounding point 305, that is, the fifth antenna 500 and the fourth antenna 400 share a grounding point, the eighth metal frame segment 008 includes a second straight line portion 0081 and a second curved line portion 0082, the second straight line portion 0081 and the second curved line portion 0082 are connected, the connecting point of the second straight line portion 0081 and the second curved line portion 0082 is electrically connected to the fifth feed point 205, and the end of the second straight line portion 0081 away from the fifth feed point 205 is electrically connected to the fifth grounding point 305. The fifth antenna 500 is a low-frequency main antenna, and the fifth antenna 500 is a hybrid antenna of a loop antenna plus a parasitic antenna, including a loop antenna with the second straight line portion 0081 as the main body, and a parasitic antenna with the second curved line portion 0082 as the main body. The fifth antenna 500 further includes a second antenna switch 502, and different low frequency bands are switched by associating the second antenna switch 502 with different inductors or capacitors, thereby achieving full coverage of 617-960 MHz.

[0044] In a possible implementation, the length of the second straight portion 0081 (ie, the distance between the fifth feeding point 205 and the fifth grounding point 305 ) is 38 mm, and the lateral length of the second curved portion 0082 is 10 mm, and the longitudinal length is 5 mm.

[0045] The free space efficiency peak value of the fifth antenna 500 at low frequency is -6 dB.

[0046] There is no overlapping frequency band between the fifth antenna and the fourth antenna, and the isolation between the two is good.

[0047] The mobile terminal provided in this embodiment further includes a sixth antenna 600, which includes a ninth metal frame segment 009, and a sixth feed point 206 and a seventh ground point 307 electrically connected to the ninth metal frame segment 009, respectively. A fifth notch 405 is provided between the ninth metal frame segment 009 and the eighth metal frame segment 008, and one end of the ninth metal frame segment 009 close to the fifth notch 405 is electrically connected to the seventh ground point 307, and the other end is short-circuited to the sixth feed point 206. The sixth antenna 600 is a medium-high frequency diversity antenna, and the type of the sixth antenna 600 is an IFA antenna.

[0048] In a possible implementation, the length of the ninth metal frame 009 is 23 mm, and the distance between the sixth feeding point 206 and the seventh grounding point 307 is 17 mm.

[0049] There is no overlapping frequency band between the sixth antenna and the fifth antenna, and the isolation between the two is good.

[0050] The mobile terminal provided in this embodiment also includes a seventh antenna 700, and the seventh antenna 700 includes a tenth metal frame segment 010, and a seventh feed point 207 and an eighth grounding point 308 electrically connected to the tenth metal frame segment 010, respectively, and a sixth notch 406 is provided between the tenth metal frame segment 010 and the ninth metal frame segment 009. The seventh antenna is an ultra-high frequency MIMO diversity antenna, and the type of the seventh antenna is an IFA antenna. In a possible implementation, the seventh antenna 700 also supports the GPS L5 band, and the frequency range of the GPS L5 band is 1176MHz, and the seventh antenna 700 can generate two resonances at 1176MHz and the ultra-high frequency through a matching circuit.

[0051] In a possible implementation, the length of the tenth metal frame segment 010 is 16 mm, the distance between the seventh feeding point 207 and the sixth notch 406 is 7 mm, the distance between the sixth feeding point and the sixth notch 406 is 6 mm, and the distance between the seventh feeding point 207 and the eighth grounding point 308 is 9 mm.

[0052] The free space efficiency of the seventh antenna is -10dB at GPS L5 and -7dB at UHF.

[0053] There is no overlapping frequency band between the seventh antenna and the sixth antenna, and the isolation between the two is good.

[0054] The mobile terminal provided in this embodiment also includes an eighth antenna 800, the eighth antenna 800 includes an eleventh metal frame segment 011, an eighth feed point 208 and a ninth grounding point 309 respectively connected to the eleventh metal frame segment 011, a seventh notch 407 is provided between the eleventh metal frame segment 011 and the tenth metal frame segment 010, and the end of the eleventh metal frame segment 011 away from the tenth metal frame segment 010 is electrically connected to the ninth grounding point 309. The eighth antenna is an ultra-high frequency MIMO main antenna, and the type of the eighth antenna is an IFA antenna. In a possible implementation, the eighth antenna is also an LTE B32 main receiving antenna, and the eleventh metal frame segment 011 has a resonance in the LTB B320 frequency band and the ultra-high frequency, respectively.

[0055] In a possible implementation, the length of the eleventh metal frame segment 011 is 17 mm, the distance between the eighth feeding point 208 and the ninth grounding point 309 is 12 mm, and the distance from the eighth feeding point 208 to the end of the eleventh metal frame segment 011 (i.e., to the seventh notch) is 5 mm.

[0056] The free space efficiency of the eighth antenna is -8dB at LTE B32 and -7dB at ultra-high frequency.

[0057] The mobile terminal provided in this embodiment also includes a ninth antenna 900, and the ninth antenna 900 includes a twelfth metal frame segment 012, a thirteenth metal frame segment 013, a ninth feeding point 209, a tenth grounding point 310 and an eleventh grounding point 311, an eighth notch 408 is arranged between the twelfth metal frame segment 012 and the thirteenth metal frame segment 013, the twelfth metal frame segment 012 and the tenth grounding point 310 are electrically connected, the thirteenth metal frame segment 013 and the eleventh grounding point 311 are electrically connected, the ninth feeding point 209 is between the tenth grounding point 310 and the eleventh grounding point 311, and a ninth notch 409 is arranged between the thirteenth metal frame segment 013 and the first metal frame segment 001. The ninth antenna 900 is a high frequency and ultra-high frequency main antenna. The ninth antenna 900 is a hybrid antenna of a loop antenna and a parasitic antenna. The main body of the loop antenna is the thirteenth metal frame segment 013, and the main body of the parasitic antenna is the twelfth metal frame segment 012. Through the joint action of the twelfth metal frame segment 012 and the thirteenth metal frame segment 013, a resonance is generated in the high frequency and the ultra-high frequency respectively.

[0058] In a possible implementation, the length of the thirteenth metal frame segment 013 is 5 mm, and the length of the twelfth metal frame segment 012 is 1.5 mm.

[0059] The ninth antenna 900 has an average free space efficiency of -5 dB at high frequencies and an average free space efficiency of -5.5 dB at ultra-high frequencies.

[0060] The mobile terminal provided in this embodiment also includes a tenth antenna 1000, and the tenth antenna 1000 includes a fourteenth metal frame segment 014, a tenth feeding point 210, and a twelfth grounding point 312, one end of the fourteenth metal frame segment 014 is electrically connected to the tenth feeding point 210, and the other end is electrically connected to the twelfth grounding point 312, the seventh notch 407 is between the fourteenth metal frame segment 014 and the eleventh metal frame segment 011, and a tenth notch 410 is set between the fourteenth metal frame segment 014 and the tenth metal frame segment 010. The tenth antenna is the first antenna for WIFI 2.4G and 5G. In a possible implementation, the tenth antenna also integrates GPS L1 (1575MHz) and LTE B32 diversity antenna. The tenth antenna is a Loop antenna. Through the matching circuit, the tenth antenna generates three resonances at 1575MHz, 2450MHz and WIFI5G. Since the frequency band of LTE B32 (1452~1496MHz) is very close to the frequency of GPS L1, good LTE B32 performance can also be achieved.

[0061] In a possible implementation, a lateral distance between the tenth feeding point 210 and the twelfth grounding point 312 is 25 mm.

[0062] For the free space efficiency of the tenth antenna, the efficiency of GPS L1 is -6.6dB, the efficiency of LTE B32 is -9dB, the efficiency of WIFI 2.4G is -5.5dB, and the efficiency of WIFI 5G is -5dB.

[0063] There is no overlapping frequency band between the tenth antenna and the seventh antenna, and the isolation between the two is good.

[0064] The mobile terminal provided in this embodiment also includes an eleventh antenna 1100, the eleventh antenna 1100 includes a fifteenth metal frame segment 015, an eleventh feeding point 211 and a thirteenth grounding point 313, one end of the fifteenth metal frame segment 015 is electrically connected to the eleventh feeding point 211, and the other end is electrically connected to the thirteenth grounding point 313, the fifteenth metal frame segment 015 is connected to the twelfth metal frame 012, a fourteenth grounding point 314 is provided between the thirteenth grounding point 313 and the tenth grounding point 310, and an eleventh notch 410 is provided between the fifteenth metal frame segment 015 and the eleventh metal frame segment 011. The eleventh antenna is the second antenna of WIFI 2.4G and WIFI 5G, the eleventh antenna 1100 is an IFA antenna, and the fifteenth metal frame segment 015 has a resonance on the WIFI 2.4G and WIFI 5G frequency bands respectively.

[0065] In a possible implementation, the distance between the eleventh feeding point 211 and the thirteenth grounding point 313 is 8 mm, and the distance between the eleventh feeding point 211 and the end of the fifteenth metal frame segment 015 (ie, the starting point of the eleventh notch 410 ) is 2 mm.

[0066] The free space efficiency of the eleventh antenna is -5.5dB in both WIFI 2.4G and WIFI 5G.

[0067] There is no overlapping frequency band between the eleventh antenna and the eighth antenna, and the isolation between the two is good. The metal frame between the eleventh antenna and the ninth antenna is paved with a common ground through the fourteenth grounding point 314, which can achieve better isolation. In a possible implementation, the distance between the thirteenth grounding point 313 and the tenth grounding point 310 is 5 mm.

[0068] The positive antenna layout of the mobile terminal can be as follows Figure 3 As shown, the first antenna 100, the second antenna 200 and the third antenna 300 are located at the bottom of the mobile terminal, are less affected by hand holding, and have good head-hand performance. The ninth antenna 900, the eleventh antenna 1100 and the fourth antenna 400 located above the mobile terminal are far away from the head and hands, so the head-hand performance is good. The eighth antenna 800, the tenth antenna 1000, the seventh antenna 700, the sixth antenna 600 and the fifth antenna 500 located at the top of the mobile terminal are close to the head, but the bandwidth of the frequency band supported by these five antennas is wider and is less affected by the head, so the head-hand performance is also good.

[0069] The free space efficiency values ​​of the antennas of the mobile terminal provided in this embodiment are shown in Table 1.

[0070]

[0071] Table 1

[0072] In summary, the present invention provides a mobile terminal, including a first antenna, a second antenna and a third antenna, which are respectively a low-frequency diversity antenna, a medium-high frequency MIMO main antenna and a medium-high frequency MIMO diversity antenna. The first antenna includes a first metal frame segment, the second antenna includes a second metal frame segment, and the third antenna includes a third metal frame segment, a fourth metal frame segment and a fifth metal frame segment. The first antenna and the second antenna support different frequency bands, and a first gap is provided between the metal frame segments of the two. The isolation between the first antenna and the second antenna is good. The second antenna and the third antenna support the same frequency band. A gap is provided between the third metal frame segment, the fourth metal frame segment and the fifth metal frame segment of the third antenna, and the fourth grounding point connected to the fifth metal frame segment is between the grounding point of the second antenna and the feeding point of the third antenna. There is a distance between the grounding points of the two, and the isolation is also very good. The present invention can achieve the effect of ensuring the performance of medium-high frequency MIMO antennas.

[0073] Finally, it should be noted that: those skilled in the art will easily think of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the technical field that are not disclosed in the present disclosure. The present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the attached claims. The above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them; although the present invention is described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mobile terminal, characterized in that: The mobile terminal comprises: A first antenna, wherein the first antenna is a low-frequency diversity antenna, and the first antenna comprises a first metal frame segment, and a first feeding point and a first grounding point electrically connected to the first metal frame segment respectively; a second antenna, the second antenna being a medium-high frequency MIMO main antenna, the second antenna comprising a second metal frame segment, and a second feeding point and a second grounding point electrically connected to the second metal frame segment, respectively, and a first gap being provided between the first metal frame segment and the second metal frame segment; The third antenna is a medium-high frequency MIMO diversity antenna, and the third antenna includes a third metal frame segment, a fourth metal frame segment and a fifth metal frame segment, the fifth metal frame segment is connected to the second metal frame segment, a second notch is provided between the third metal frame segment and the fourth metal frame segment, a third notch is provided between the third metal frame segment and the fifth metal frame segment, the third metal frame segment is electrically connected to a third feeding point, an end of the fourth metal frame segment away from the third metal frame segment is electrically connected to a third grounding point, an end of the fifth metal frame segment away from the third metal frame segment is electrically connected to a fourth grounding point, and the fourth grounding point is between the second grounding point and the third feeding point.

2. The mobile terminal according to claim 1, characterized in that: The first metal frame segment includes a first straight portion and a first curved portion, and the first feeding point and the first grounding point are between the first straight portion and the first curved portion.

3. The mobile terminal according to claim 1, characterized in that: The mobile terminal also includes a fourth antenna, which is a medium frequency main set and ultra-high frequency diversity antenna. The fourth antenna includes a sixth metal frame segment, a seventh metal frame segment, a fourth feeding point, a fifth grounding point and a sixth grounding point. A fourth gap is provided between the sixth metal frame segment and the seventh metal frame segment, an end of the sixth metal frame segment away from the fourth gap is electrically connected to the fifth grounding point, the fourth feeding point is between the fifth grounding point and the fourth gap, and an end of the seventh metal frame segment away from the fourth gap is electrically connected to the sixth grounding point.

4. The mobile terminal according to claim 3, characterized in that: The mobile terminal also includes a fifth antenna, which is a low-frequency main antenna. The fifth antenna includes an eighth metal frame segment, a fifth feed point and the fifth grounding point. The eighth metal frame segment includes a second straight line portion and a second curved line portion, the second straight line portion and the second curved line portion are connected, the fifth feed point is electrically connected to the connection point of the second straight line portion and the second curved line portion, and the end of the second straight line portion away from the fifth feed point is electrically connected to the fifth grounding point.

5. The mobile terminal according to claim 4, characterized in that: The mobile terminal also includes a sixth antenna, which is a medium-high frequency diversity antenna. The sixth antenna includes a ninth metal frame segment, a sixth feeding point and a seventh grounding point. A fifth notch is provided between the ninth metal frame segment and the eighth metal frame segment, and an end of the ninth metal frame segment close to the fifth notch is electrically connected to the seventh grounding point.

6. The mobile terminal according to claim 5, characterized in that: The mobile terminal also includes a seventh antenna, which is an ultra-high frequency MIMO diversity antenna. The seventh antenna includes a tenth metal frame segment, and a seventh feeding point and an eighth grounding point electrically connected to the tenth metal frame segment respectively, and a sixth gap is arranged between the tenth metal frame segment and the ninth metal frame segment.

7. The mobile terminal according to claim 6, characterized in that: The mobile terminal also includes an eighth antenna, which is an ultra-high frequency MIMO main antenna. The eighth antenna includes an eleventh metal frame segment, an eighth feeding point and a ninth grounding point. A seventh gap is provided between the eleventh metal frame segment and the tenth metal frame segment, and one end of the eleventh metal frame segment away from the tenth metal frame segment is electrically connected to the ninth grounding point.

8. The mobile terminal according to claim 7, characterized in that: The mobile terminal also includes a ninth antenna, which is a high frequency and ultra-high frequency main antenna. The ninth antenna includes a twelfth metal frame segment, a thirteenth metal frame segment, a ninth feeding point, a tenth grounding point and an eleventh grounding point. An eighth gap is provided between the twelfth metal frame segment and the thirteenth metal frame segment. The twelfth metal frame segment is electrically connected to the tenth grounding point, the thirteenth metal frame segment is electrically connected to the eleventh grounding point, the ninth feeding point is between the tenth grounding point and the eleventh grounding point, and a ninth gap is provided between the thirteenth metal frame segment and the first metal frame segment.

9. The mobile terminal according to claim 7, characterized in that: The mobile terminal also includes a tenth antenna, which is the first antenna for WIFI 2.4G and WIFI 5G. The tenth antenna includes a fourteenth metal frame segment, a tenth feeding point and a twelfth grounding point. One end of the fourteenth metal frame segment is electrically connected to the tenth feeding point, and the other end is electrically connected to the twelfth grounding point. The seventh notch is between the fourteenth metal frame segment and the eleventh metal frame segment, and a tenth notch is provided between the fourteenth metal frame segment and the tenth metal frame segment.

10. The mobile terminal according to claim 8, characterized in that: The mobile terminal also includes an eleventh antenna, which is a second antenna for WIFI 2.4G and WIFI 5G. The eleventh antenna includes a fifteenth metal frame segment, an eleventh feeding point and a thirteenth grounding point. One end of the fifteenth metal frame segment is electrically connected to the eleventh feeding point, and the other end is electrically connected to the thirteenth grounding point. The fifteenth metal frame segment is connected to the twelfth metal frame segment, a fourteenth grounding point is arranged between the thirteenth grounding point and the tenth grounding point, and an eleventh notch is arranged between the fifteenth metal frame segment and the eleventh metal frame segment.

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