WO2018219112A1 - Structure de terminal multi-antenne et terminal mobile - Google Patents

Structure de terminal multi-antenne et terminal mobile Download PDF

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Publication number
WO2018219112A1
WO2018219112A1 PCT/CN2018/086315 CN2018086315W WO2018219112A1 WO 2018219112 A1 WO2018219112 A1 WO 2018219112A1 CN 2018086315 W CN2018086315 W CN 2018086315W WO 2018219112 A1 WO2018219112 A1 WO 2018219112A1
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WIPO (PCT)
Prior art keywords
spacer
conductive
conductive region
antenna
region
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PCT/CN2018/086315
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English (en)
Chinese (zh)
Inventor
黄奂衢
陈玉稳
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维沃移动通信有限公司
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Publication of WO2018219112A1 publication Critical patent/WO2018219112A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors

Definitions

  • the present disclosure relates to the field of electronic technologies, and more particularly, to a terminal multi-antenna structure and a mobile terminal.
  • a antenna structure of the mobile terminal often has a slit 100 corresponding to a group (two or more) of the antenna arms 200. If the side of the slit is used as the radiating end of the antenna, the electric field strength is generally strong, so that it is easier to couple to the antenna on the other side of the slit, and the isolation between the multiple antennas is deteriorated.
  • the technical problem to be solved by the present disclosure is to provide an antenna structure and a mobile terminal to solve the problem of poor isolation between multiple antennas of a mobile terminal in the related art.
  • a terminal multi-antenna structure comprising: a metal portion, wherein the metal portion is provided with at least one slit, and the metal structures on both sides of the fracture correspond to at least one antenna arm respectively; a circuit board PCB board extending out of the protruding portion in a direction toward the slit, the protruding portion being provided with at least one spacer for isolating the antenna arms on both sides of the slit, the spacer having conductivity; the spacer directly Grounding, or the spacer is selected to be grounded by a predetermined frequency.
  • a mobile terminal comprising: the terminal multi-antenna structure as described above.
  • the terminal multi-antenna structure of the embodiment of the present disclosure has a metal portion forming an antenna, and the metal portion is provided with at least one broken seam, and the metal structures on both sides of the broken seam respectively correspond to at least An antenna arm;
  • the PCB board of the terminal extends out of the protruding portion in a direction of the slit, and the protruding portion is provided with at least one spacer for isolating the antenna arms on both sides of the slit, the spacer has conductivity; the spacer is directly grounded or passed through Set the frequency to select the network ground.
  • the isolation piece selects the network ground through the preset frequency, so that the isolation piece can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom of antenna performance debugging.
  • the break width of the slit to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained.
  • FIG. 1 is a schematic diagram of a multi-antenna structure of a conventional terminal
  • FIG. 2 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure
  • FIG. 3 is a schematic diagram of another specific implementation of a multi-antenna structure of a terminal according to the present disclosure
  • FIG. 4 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 5 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 6 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 7 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 8 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 9 is a schematic diagram of another specific implementation of a multi-antenna structure of the terminal of the present disclosure.
  • Figure 10 is an enlarged schematic view of A in Figure 9;
  • FIG. 11 is another schematic diagram of a multi-antenna structure of the terminal of the present disclosure.
  • FIG. 12 is a schematic diagram of another specific implementation of a multi-antenna structure of a terminal according to the present disclosure.
  • Figure 13 is an enlarged schematic view of B in Figure 12.
  • a terminal multi-antenna structure including: a metal portion 1 having at least one slit 11 disposed thereon, the slit
  • the metal structures on both sides of the 11 respectively correspond to at least one antenna arm 12;
  • the printed circuit board PCB of the terminal extends in a direction of the slit 11 to protrude from the protruding portion 4, and the protruding portion 4 is provided with two slits 11 for isolating the slit 11
  • the spacer 2 can be directly grounded to improve the isolation between the multiple antennas on both sides of the slit 11.
  • the spacer 2 can also be grounded through the preset frequency selection network 3, so that the spacer 2 can have different impedance responses to the antennas on both sides of the fracture, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • At least one spacer 2 for isolating the two side antenna arms 12 may be provided in each of the slits 11 respectively.
  • the metal portion 1 may be an inner metal outline of a metal frame, a metal ring, a metal shell or a non-metallic material.
  • a part of the metal casing may be laterally hollowed out, divided into an antenna area and a main ground, the antenna area is used as the metal part 1, and a slit 11 is arranged in the longitudinal direction of the antenna area, and is broken into at least two.
  • the terminal multi-antenna structure of the embodiment of the present disclosure by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced, the isolation between the multiple antennas is improved, and the optimization is optimized.
  • Antenna performance The isolation piece 2 is grounded through the preset frequency selection network 3, so that the isolation piece 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the isolation between the multiple antennas and improve the degree of freedom of antenna performance debugging. .
  • the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained.
  • the problem of poor isolation between multiple antennas of a mobile terminal in the related art is solved.
  • each two adjacent spacers 2 are electrically connected by a predetermined frequency selection network 3.
  • the two adjacent spacers 2 are electrically connected through the preset frequency selection network 3, so that the better isolation between the multi-antennas at the same frequency or near the operating frequency is improved, and the same frequency or the operating frequency is improved.
  • each of the antenna arms 12 is electrically coupled to the spacer 2 closest to the antenna arm 12 by a predetermined frequency selection network 3.
  • the predetermined frequency selection network 3 is electrically connected with the different antenna arms 12 on both sides of the slit 11 to realize the frequency division filtering, and the path of the low frequency current is extended by the frequency division filtering (because the required current path and work)
  • the frequency is inversely correlated), which improves the performance of low-frequency functions, such as improving the performance of the 13.56MHz NFC (Near Field Communication) function (but not limited to this), and reduces the impact on other antennas.
  • the spacer 2 is connected to the main ground of the terminal circuit. That is, the spacer 2 can be directly connected to the main ground or connected to the main ground through the preset frequency selection network 3.
  • the main ground of the terminal circuit generally comprises a printed circuit board PCB board and a large piece of integral metal connected thereto, and forms an induced current with the antenna radiator as a reference ground for the antenna.
  • the main ground is a main ground on a PCB board or a metal middle frame, but is not limited thereto.
  • the protruding portion 4 is provided with one of the spacers 2, and the spacer 2 is grounded by a predetermined frequency selection network 3.
  • the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 3, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna.
  • the state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.
  • the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the fracture 11 in a centered manner, or can be disposed in a non-centered manner. Sew 11 to achieve better antenna performance.
  • the spacer 2 when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that is open to the other side is approached to reduce the short circuit condition.
  • the effect on the performance of the side antenna Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.
  • the main ground is the main ground 5 of the terminal PCB board
  • the protruding portion 4 includes a conductive area 41, and the conductive area 41 is inserted away from one end of the PCB board.
  • the conductive region 41 is provided with a conductive layer, the conductive region 41 serves as the spacer 2, and the conductive layer serves as a conductive portion of the spacer 2;
  • Pads 7 are respectively disposed on the conductive portion of the spacer 2 and the main ground 5 of the PCB board, and the preset frequency selection network 3 is soldered between the two pads 7 (not shown in FIG. 3) show).
  • the spacer 2 is grown from the PCB board between the slits, and is integrated with the PCB board.
  • a portion of the protruding portion 4 serves as the spacer 2
  • another portion is the insulating region 42
  • the insulating region 42 is a non-conductive substrate region.
  • a conductive layer may be laid on both the upper and lower sides of the protruding portion or even in each inner layer, and then turned on through the via hole via (but is not limited thereto).
  • the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation.
  • a pad 7 is disposed on the conductive portion of the spacer 2 and the main ground 5 of the PCB, and a preset frequency selection network 3 is soldered between the two pads 7, thereby realizing the spacer 2 to pass the preset.
  • the frequency selection network 3 is connected to the main ground 5 of the PCB board, so that the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in debugging the performance of the antenna.
  • the spacer 2 can be disposed in the slit 11 in a centered or not centered manner, thereby achieving better antenna performance.
  • each antenna arm 12 can be connected to the main ground 5 of the PCB board via a feed source 6.
  • the feed 6 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.
  • the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed source 6.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11 to improve the degree of freedom in debugging the performance of the antenna.
  • the insulating region 42 is formed between the spacer 2 (ie, the conductive region 41) and the PCB board, the width of the insulating region 42 and the width of the spacer 2 the same.
  • the protruding portion 4 is a rectangular strip
  • the conductive portion 41 is in the upper half as the spacer 2
  • the insulating portion 42 is in the lower half.
  • the insulating region 42 is formed between the spacer 2 and the PCB board, and the width of the insulating region 42 gradually increases from a position where the spacer 2 (i.e., the conductive region 41) is connected.
  • the insulating region 42 of the protruding portion 4 is structurally reinforced, and the insulating region 42 is widened on the basis of Fig. 3, so that the overall structural strength is enhanced.
  • the spacer 2 i.e., the conductive region 41
  • the spacer 2 is formed at one end of the insulating region 42, and the width of the insulating region 42 is larger than the width of the spacer 2.
  • the insulating region 42 of the protruding portion 4 is structurally reinforced, and the insulating region 42 is widened on the basis of Fig. 3, so that the overall structural strength is enhanced.
  • the protruding portion 4 is provided with two of the spacers 2 (the first spacer 21 and the second spacer 22), and the two isolations
  • the chips 2 are electrically connected to each other through a preset frequency selection network 3 and directly grounded.
  • multiple antennas can also have better isolation, improve the isolation between multiple antennas with the same frequency or working frequency, and improve the freedom of antenna performance debugging.
  • the spacer can be close to the short-circuit state on one side of the fracture 11 and close to the open state on the other antenna. Therefore, the antennas on both sides of the fracture 11 can have different responses and influences, so there is a higher degree of freedom in debugging the antenna performance.
  • the position optimization of the spacer 2 can be performed, that is, the two spacers 2 as a whole (but not limited thereto) can be disposed in the fracture 11 in a centered manner. It can also be placed in the slit 11 in a non-centered manner to achieve better antenna performance.
  • the two spacers may be adjusted as a whole (but not limited thereto) to deviate from the side antenna, that is, an antenna that presents an open state to the other side. Close to reduce the impact on the performance of the side antenna due to the presence of a short circuit condition. Moreover, this method can often reduce the need to increase the break width of the slit, ensure the appearance effect, and have better antenna performance.
  • the main ground is the main ground 5 of the terminal PCB board
  • the protruding portion 4 includes a first conductive area 411 and a second conductive area 412, wherein the two conductive areas Do not connect to each other, and the first conductive region 411 is away from the end of the PCB board and the second conductive region 412 is inserted away from the end of the PCB board into the slit 11;
  • the first conductive region 411 is provided with a first conductive layer 411 as a first spacer 21 in the slit 11 , and the first conductive layer serves as a conductive portion of the first spacer 21 .
  • An insulating region 42 is disposed between the first spacer 21 and the main ground 5 of the PCB;
  • the second conductive region 412 is covered with a second conductive layer, and the second conductive region 412 is used as a slit 11 a second spacer 22, the second conductive layer serves as a conductive portion of the second spacer 22, and the second spacer 22 is electrically connected to the main ground 5 of the PCB board;
  • Pads 7 are respectively disposed on the conductive portions of the first spacers 21 and the conductive portions of the second spacers 22, and the preset frequency selection network 3 is soldered between the two pads 7 ( Not shown in Figure 7).
  • the spacer 2 is grown from the PCB board between the slits, and is integrated with the PCB board.
  • the protruding portion 4 is divided into three regions, two conductive regions and one insulating region 42, and the insulating region 42 is a non-conductive substrate region.
  • One of the two conductive regions (the second conductive region 412) is directly connected to the main ground 5 of the PCB board, and the other conductive region (the first conductive region 411) passes through the insulating region 42 between the main ground 5 of the PCB board. Separated, the two conductive regions are also separated by an insulating region 42.
  • the two conductive regions are respectively used as spacers, that is, the first conductive region 411 is the first spacer 21 and the second conductive region 412 is the second spacer 22.
  • the conductive portions of the two spacers may be provided with a conductive layer on the upper and lower sides of the conductive region or even in each inner layer, and then turned on through the via hole via (but are not limited thereto).
  • the PCB of the protruding portion 4 can also be locally thickened (ie, the shaped plate stack) to enhance the isolation.
  • the conductive portion of the first spacer 21 and the conductive portion of the second spacer 22 are respectively provided with pads 7, and a preset frequency selection network 3 is soldered between the two pads 7, and the second spacer 22 is soldered. It is connected with the main ground 5 of the PCB board, so that the two isolation sheets are connected through the preset frequency selection network 3, and then connected to the main ground 5 of the PCB board, so that even between multiple antennas of the same frequency or close to the working frequency. It can have better isolation and improve the isolation between multiple antennas with the same frequency or working frequency.
  • the two spacers can be disposed in the slit 11 as a whole (but not limited thereto) in a centered or non-centered manner, thereby achieving better antenna performance.
  • each antenna arm 12 can be connected to the main ground 5 of the PCB board via a feed source 6.
  • the feed 6 generally refers to a portion where the feed line is connected to the antenna, and the feed line generally refers to a transmission line whose RF front end is connected to the antenna.
  • the metal portion 1 of the antenna arm 12 and the slit 11 may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed source 6.
  • the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, even multiple antennas with the same frequency or close to the working frequency can have better isolation, improve the isolation between multiple antennas with the same frequency or working frequency, and improve the degree of freedom of antenna performance debugging.
  • the protruding portion 4 is provided with one of the spacers 2, and the spacer 2 is grounded through a preset frequency selection network 3, and each of the The antenna arm 12 is electrically connected to the spacer 2 closest to the antenna arm 12 via a predetermined frequency selection network 3.
  • the spacer 2 is inserted in the slit 11 between the multiple antennas, and the spacer 2 is grounded through the preset frequency selection network 3, that is, a spacer having frequency selectivity is inserted in the slit 11 between the multiple antennas. 2.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • the predetermined frequency selection network 3 is electrically connected with different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the path of the low frequency current is extended by frequency division filtering (because the required current path and the working frequency are Reverse correlation) improves the performance of low-frequency functions, such as (but not limited to) the performance of the 13.56MHz NFC function, and reduces the impact on other antennas.
  • the preset frequency selection network 3 of the ground also plays the role of not allowing the low-frequency current path to be directly connected to the ground, so that the low-frequency performance is further improved.
  • the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna.
  • the state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.
  • the position of the spacer 2 can be optimized, that is, the spacer 2 can be disposed in the fracture 11 in a centered manner, or can be disposed in a non-centered manner. Sew 11 to achieve better antenna performance.
  • the spacer 2 when the spacer 2 presents a short-circuit (ground) state to a side antenna, the spacer 2 can be adjusted to deviate from the side antenna, that is, the antenna that is open to the other side is approached to reduce the short circuit condition.
  • the effect on the performance of the side antenna Moreover, this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.
  • the above-mentioned main ground is the main ground 5 of the terminal PCB board
  • the protruding portion 4 includes a third conductive region 413, a fourth conductive region 414, and a fifth conductive a region 415, wherein the three conductive regions are not connected to each other, and the three conductive regions are separated from the main ground 5 of the PCB board by an insulating region 42; wherein the third conductive region 413 is disposed at the fourth Between the conductive region 414 and the fifth conductive region 415, an end of the third conductive region 413 away from the PCB board is inserted into the slit 11, the fourth conductive region 414 and the fifth The conductive region 415 is electrically connected to the antenna arm 12 on both sides of the fracture 11 through the elastic piece 8 respectively;
  • the third conductive region 413 is provided with a conductive layer, the third conductive region 413 is used as the spacer 2, and the conductive layer of the third conductive region 413 is used as a conductive portion of the spacer 2;
  • the conductive portion of the spacer 2, the fourth conductive region 414, the fifth conductive region 415, and the main ground 5 of the PCB board are respectively provided with pads 7; pads on the spacer 2 7 between the pad 7 on the fourth conductive region 414, between the pad 7 on the spacer 2 and the pad 7 on the fifth conductive region 415, and on the spacer 2
  • the predetermined frequency selection network 3 (not shown in FIGS. 9, 10) is soldered between the pad 7 and the pad 7 on the main ground 5 of the PCB board, respectively.
  • the spacer 2 is grown from the PCB board between the slits 11 and is integrated with the PCB board.
  • the protruding portion 4 may include a wider portion below the slit 11 and a narrower portion that is inserted into the slit 11.
  • the wider portion is provided with a conductive region, that is, a fourth conductive region 414 and a fifth conductive region 415, respectively, at two positions close to the antenna arms 12 on both sides.
  • the narrower portion is provided with a conductive region that is inserted into the slit 11, that is, the third conductive region 413.
  • the three conductive regions are separated by an insulating region 42 respectively, and the three conductive regions are also separated from the main ground 5 of the PCB by the insulating region 42, and the insulating region 42 is a non-conductive substrate region.
  • the third conductive region 413 serves as the spacer 2.
  • the conductive portion of the spacer 2 may be provided with a conductive layer on both the upper and lower sides of the conductive region or even in each inner layer, and then turned on through the via hole via (but is not limited thereto).
  • the fourth conductive region 414 and the fifth conductive region 415 can also be provided by laying a conductive layer and then conducting the conductive portion by via conduction.
  • each antenna arm 12 can be connected to the main ground of the PCB board through a feed source.
  • the feed generally refers to the portion where the feed line is connected to the antenna, and the feed line generally refers to the transmission line where the RF front end is connected to the antenna.
  • the pad 7 is disposed on the conductive portion of the spacer 2, the fourth conductive region 414, the fifth conductive region 415, and the main ground 5 of the PCB.
  • a preset frequency selection is soldered between the pad 7 on the spacer 2 and the pad 7 on the fourth conductive region 414, the pad 7 on the spacer 2, and the pad 7 on the fifth conductive region 415, respectively.
  • the network 3 realizes that the network 3 is electrically connected to different antenna arms 12 on both sides of the slit 11 through the preset frequency selection network, and the path of the low-frequency current can be extended by the frequency division filtering to improve the low-frequency performance. For example, referring to FIG. 9 , assuming that the first feed source 61 is a feed of NFC, the dotted line C in FIG.
  • the pad 7 on the spacer 2 and the main ground 5 of the PCB are also soldered with a preset frequency selection network 3, so that the spacer 2 is grounded through the preset frequency selection network 3, so that the spacer 2 is broken.
  • the antennas on both sides of the 11 can have different impedance responses to improve the freedom of antenna performance debugging.
  • the spacer 2 can be disposed in the slit 11 in a centered or not centered manner, thereby achieving better antenna performance.
  • the metal portion 1 in which the antenna arm 12 and the slit 11 are provided may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground of the PCB board by a feed.
  • the spacer 2 by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the low frequency performance is improved, and the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in antenna performance debugging.
  • the protruding portion 4 is provided with two of the spacers 2 (the first spacer 21 and the second spacer 22), and the two isolations After the chips 2 are electrically connected through the preset frequency selection network 3, the network 3 is grounded through the preset frequency, and each of the antenna arms 12 and the spacer 2 closest to the antenna arm 12 are preset. The frequency selection network 3 is electrically connected.
  • the spacer 2 can have different impedance responses to the antennas on both sides of the slit 11, thereby improving the isolation between the multiple antennas and improving the degree of freedom in debugging the antenna performance.
  • the two spacers 2 are connected through a preset frequency selection network 3 and then grounded. This design can provide better isolation even between multiple antennas of the same frequency or near the operating frequency, improving the same frequency or operating frequency.
  • the predetermined frequency selection network 3 is electrically connected to different antenna arms 12 on both sides of the slit 11 to realize frequency division filtering, and the path of the low frequency current is extended by frequency division filtering (because the required current path and the operating frequency are Reverse correlation) improves the performance of low-frequency functions, such as (but not limited to) the performance of the 13.56MHz NFC function, and reduces the impact on other antennas.
  • the preset frequency selection network 3 of the ground also plays the role of not allowing the low-frequency current path to be directly connected to the ground, so that the low-frequency performance is further improved.
  • the spacer 2 can be close to the short-circuit state on one side of the fracture 11 and close to the open on the other antenna.
  • the state, so that the antenna on both sides of the fracture 11 can have different responses and effects, so there is a higher degree of freedom in antenna performance debugging.
  • the position optimization of the spacer 2 can be performed, that is, the two spacers 2 as a whole (but not limited thereto) can be disposed in the fracture 11 in a centered manner. It can also be placed in the slit 11 in a non-centered manner to achieve better antenna performance.
  • the two spacers 2 may be adjusted as a whole (but not limited thereto) to be offset from the side antenna, that is, to be open to the other side.
  • the antennas are close to reduce the effect on the performance of the side antenna due to the presence of a short circuit condition.
  • this method can often reduce the need to increase the breaking width of the slit 11 to ensure the appearance effect and have better antenna performance.
  • the main ground is the main ground 5 of the terminal PCB board
  • the protruding portion 4 includes a sixth conductive area 416, a seventh conductive area 417, and an eighth conductive. a region 418 and a ninth conductive region 419, wherein the four conductive regions are not connected to each other, and between the four conductive regions and the main ground 5 of the PCB board are insulating regions 42; wherein the sixth conductive region 416 And the seventh conductive region 417 is disposed between the eighth conductive region 418 and the ninth conductive region 419, the sixth conductive region 416 is away from one end of the PCB board and the seventh conductive region 417 One end away from the PCB board is inserted into the slit 11 , and the eighth conductive area 418 and the ninth conductive area 419 are electrically connected to the antenna arm 12 on both sides of the slit 11 through the elastic piece 8 respectively;
  • the sixth conductive region 416 is provided with a conductive layer.
  • the sixth conductive region 416 serves as a first spacer 21 in the slit 11 , and the conductive layer of the sixth conductive region 416 serves as the first spacer 21 .
  • the seventh conductive region 417 is provided with a conductive layer, the seventh conductive region 417 serves as a second spacer 22 in the slit 11, and the conductive layer of the seventh conductive region 417 serves as the second isolation a conductive portion of the sheet 22;
  • the conductive portion of the first spacer 21, the eighth conductive region 418, the ninth conductive region 419, and the main ground 5 of the PCB board are respectively provided with pads 7, and the second spacer 22
  • the conductive portion is respectively provided with a pad 7 on the first position 91 and the second position 92, wherein a distance between the first position 91 and the main ground 5 of the PCB board is greater than the second position 92 and The distance between the main ground 5 of the PCB board;
  • the pad 7 on the first spacer 21 and the pad 7 on the eighth conductive region 418, the pad 7 on the first spacer 21 and the second spacer 22 Between the pads 7 on a location 91, between the pads 7 on the first location 91 of the second spacer 22 and the pads 7 on the ninth conductive region 419, and the second spacer
  • the predetermined frequency selection network 3 (not shown in FIGS. 12, 13) is soldered between the pads 7 on the second location 92 of 22 and the pads 7 on the main ground 5 of the PCB.
  • the spacer 2 is grown from the PCB board between the slits 11 and is integrated with the PCB board.
  • the protruding portion 4 may include a wider portion below the slit 11 and a narrower portion that is inserted into the slit 11.
  • the wider portion is provided with a conductive region, that is, an eighth conductive region 418 and a ninth conductive region 419, respectively, at two positions close to the antenna arms 12 on both sides.
  • the narrower portion is provided with two conductive regions that are inserted into the slit 11, that is, the sixth conductive region 416 and the seventh conductive region 417.
  • the four conductive regions are respectively separated by the insulating region 42, and the four conductive regions are also separated from the main ground 5 of the PCB by the insulating region 42, and the insulating region 42 is a non-conductive substrate region.
  • the sixth conductive region 416 and the seventh conductive region 417 are respectively used as spacers, that is, the sixth conductive region 416 is the first spacer 21 and the seventh conductive region 417 is the second spacer 22.
  • the conductive portions of the two spacers may be provided with a conductive layer on both the upper and lower sides of the conductive region or even in each inner layer, and then turned on (but not limited to) through the via holes via.
  • each antenna arm 12 can be connected to the main ground of the PCB board through a feed source.
  • the feed generally refers to the portion where the feed line is connected to the antenna, and the feed line generally refers to the transmission line where the RF front end is connected to the antenna.
  • the conductive portion of the first spacer 21, the eighth conductive region 418, the ninth conductive region 419, and the main ground 5 of the PCB board are respectively provided with pads 7, and the conductive portion of the second spacer 22 is at the first position 91.
  • Pads 7 are provided on the second position 92, respectively.
  • the pad 7 on the first spacer 21 and the pad 7 on the eighth conductive region 418 are soldered between the pad 7 on the second spacer 22 and the pad 7 on the ninth conductive region 419, respectively.
  • the preset frequency selects the network 3, thereby realizing the electrical connection between the different antenna arms 12 on both sides of the slit 11 through the preset frequency selection network 3, and thereby extending the path of the low frequency current through the frequency division filtering to improve the low frequency performance.
  • the first feed source 61 is a feed of NFC
  • the dotted line D in FIG. 12 is the extended NFC current path of the present disclosure, so that it is not limited by the appearance of the fracture. Good user experience.
  • One end of the broken line D is the first feed source 61, and the other end is connected to the main ground 5 of the PCB board by the antenna arm 12 via the elastic piece 8.
  • a preset frequency selection network 3 is respectively soldered between the pads 7 on the main ground 5, so that the two isolation sheets are connected through the preset frequency selection network 3, and then the network 3 is grounded through the preset frequency. Even multiple antennas with the same frequency or close to the working frequency can have better isolation, which improves the degree of freedom of antenna performance debugging.
  • the two spacers can be disposed in the slit in a centered or non-centered manner as a whole (but not limited thereto), thereby achieving better antenna performance.
  • the metal portion 1 in which the antenna arm 12 and the slit 11 are disposed may be the top or bottom of the metal middle frame (but is not limited thereto).
  • Two slits 11 may be arranged at the top or bottom of the metal middle frame to break the metal middle frame into three metal structures, wherein the metal structure between the two fractures 11 is divided into two antenna arms 12 by grounding, and the other two The metal structures act as an antenna arm 12, respectively, thereby breaking the top or bottom of the metal middle frame into four antenna arms 12, each antenna arm 12 being connected to the main ground 5 of the PCB board by a feed.
  • the spacer 2 by adding the spacer 2 to the slit 11 between the antennas, the mutual coupling between the multiple antennas on both sides of the slit 11 is reduced, the isolation between the multiple antennas is improved, and the antenna performance is optimized. Moreover, the breaking width of the slit 11 to be increased can be reduced, the appearance effect is ensured, and the overall product competitiveness and user experience can be maintained. Moreover, the low frequency performance is improved, and the spacer 2 can have different impedance responses to the antennas on both sides of the fracture 11 to improve the degree of freedom in antenna performance debugging. Moreover, even multiple antennas with the same frequency or close to the working frequency can have better isolation, thereby improving the isolation between multiple antennas with the same frequency or working frequency, and further improving the degree of freedom of antenna performance debugging.
  • the preset frequency selection network 3 mentioned herein may be combined by one or more of a capacitor, an inductor, a magnetic bead, a resistor and a filter by series and/or parallel.
  • the preset frequency selection network 3 is an adjustable frequency selection network or a fixed (ie, non-adjustable) frequency selection network. The specific settings can be made according to actual needs.
  • the preset frequency selection network 3 may be a network having a specific frequency selection function that meets the requirements obtained by combining the experimental data.
  • the adjustable frequency selection network is a frequency selective network with adjustable parameters
  • the fixed frequency selection network is a frequency selection network with non-adjustable parameters.
  • the spacer 2 can be placed in the slit 11 in a centered or uncentered manner to further optimize the antenna performance.
  • the plurality of spacers 2 may be disposed as a whole in a centered or not centered manner.
  • the length of the grounding path of the spacer 2 is smaller than the length of the shortest antenna arm 12 on both sides of the slit 11.
  • the width of the slit 11 is less than or equal to 100 mm; the total thickness of all the spacers 2 in the slit 11 is less than or equal to 50. Millimeter.
  • the cross-sectional area of the spacer 2 may be smaller than the cross-sectional area of the metal structure on both sides of the slit 11 so that the spacer 2 is not covered by the non-metallic material in the slit 11.
  • all of the conductive structures described herein, such as the conductive layer and the elastic piece 8, may be made of a metal material (but are not limited thereto).
  • the multi-antenna structure of the terminal in the embodiment of the present disclosure utilizes a relatively simple, mature, stable, and low-cost design implementation scheme, which reduces the mutual coupling between multiple antennas on both sides of the fracture 11 and improves the inter-connectivity between the multiple antennas. Isolation optimizes antenna performance.
  • one or more of the above-mentioned spacers 2 to be connected to the ground through an adjustable or fixed frequency selection network, etc., and designing different impedance load environments for the antennas on both sides of the fracture 11 as a pair
  • the spacers 2 for the antennas on both sides of the fracture 11 are isolated, and the mutual coupling between the multiple antennas on both sides of the fracture 11 is reduced and the isolation is improved, so that the antenna performance is improved. Can be improved.
  • the antenna performance can be optimized again.
  • the present disclosure can achieve better isolation and improve the performance of low frequency (such as NFC).
  • the present disclosure may have a greater chance of achieving better multi-antenna performance without significantly increasing the width of the appearance slit 11 and thus maintaining a better overall product competitiveness and user experience.
  • the spacer of the present disclosure can be produced from a PCB board to increase the strength of the overall structure.
  • the spirit of the present disclosure is directed to a multi-antenna (not limited to a metal ring and a joint on a metal shell, as long as it is applicable between multiple antennas) via a main ground (eg, a PCB board or a metal middle frame, but not Limit) the insertion of one or more (one or more) of the above-mentioned spacers 2, and the phase selection network and the like by means of (adjustable or fixed) inductors/capacitors/beads or their series/parallel mixing
  • the connection is connected to the ground to serve as the spacer 2 for isolation between the multiple antennas to achieve better overall product competitiveness and user experience. Therefore, the scope of protection includes, but is not limited to, the above-mentioned embodiments and structural shapes therein. Form, size, location and number, etc.
  • a mobile terminal comprising: the terminal multi-antenna structure as described in the above embodiments.
  • the mobile terminal of the present disclosure may be, for example, a computer, a tablet computer, a personal digital assistant (PDA), or a vehicle-mounted computer.
  • PDA personal digital assistant

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Support Of Aerials (AREA)
  • Waveguide Aerials (AREA)

Abstract

La présente invention concerne une structure de terminal multi-antenne et un terminal mobile. La structure de terminal multi-antenne comprend : une partie métallique, la partie métallique comprenant sur celle-ci au moins une jonction de rupture, et des structures métalliques sur deux côtés de la jonction de rupture correspondant à au moins un bras d'antenne, respectivement; une partie en saillie d'une carte de circuit imprimé (PCB) du terminal, qui s'étend dans une direction vers la jonction de rupture, la partie en saillie comprenant sur celle-ci au moins un élément d'espacement qui est utilisé pour isoler les bras d'antenne des deux côtés de la jonction de rupture; l'élément d'espacement est électroconducteur, et l'élément d'espacement est directement mis à la terre, ou l'élément d'espacement est mis à la terre au moyen d'un réseau sélectif en fréquence prédéfini.
PCT/CN2018/086315 2017-05-31 2018-05-10 Structure de terminal multi-antenne et terminal mobile WO2018219112A1 (fr)

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