JP6298104B2 - All-metal backshell antenna system - Google Patents

All-metal backshell antenna system Download PDF

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Publication number
JP6298104B2
JP6298104B2 JP2016119329A JP2016119329A JP6298104B2 JP 6298104 B2 JP6298104 B2 JP 6298104B2 JP 2016119329 A JP2016119329 A JP 2016119329A JP 2016119329 A JP2016119329 A JP 2016119329A JP 6298104 B2 JP6298104 B2 JP 6298104B2
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side wall
metal part
slit
metal
electrically connected
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JP2017085541A (en
Inventor
ウー、ジン
マイ、ジァンチュン、
ワン、チャオ
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エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd.
エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd.
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Priority to CN201510700646.5A priority Critical patent/CN105305066B/en
Priority to CN201510700646.5 priority
Application filed by エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd., エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd. filed Critical エーエーシー テクノロジーズ ピーティーイー リミテッドAac Technologies Pte.Ltd.
Priority claimed from US15/283,530 external-priority patent/US10374287B2/en
Publication of JP2017085541A publication Critical patent/JP2017085541A/en
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Publication of JP6298104B2 publication Critical patent/JP6298104B2/en
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Description

  The present invention relates to the mobile communication field, and more particularly to a mobile terminal antenna system.

  With the development of mobile communication technology, the role of various electronic products in people's entertainment and life is important, and many electronic products are gradually updated to electronic communication products having communication functions. Under such circumstances, the antenna system is one of the central members of electronic communication products.

  The radiating part is an important member of the antenna system. Conventionally, in an electronic communication product, a radiation portion of an antenna system is installed on a plastic rear cover surface. Such a scheme is relatively easy to implement because the plastic rear cover does not shield the radiation of the antenna system.

  However, with changes in consumer demand, demand for electronic communication products, in addition to their application functions, for their appearance, texture, etc., is increasing, and the popularity of metal case communication products is increasing. It is increasing. By the way, since electromagnetic waves cannot permeate | transmit a metal, an antenna performance detection standard cannot be satisfy | filled only by installing an antenna system in a metal case. Conventionally, there is a method of emitting a signal by a method of installing a slit in a metal rear cover. However, such a method damages the integrity of the entire structure of the electronic communication product.

  Therefore, in order to solve the above-described problem, it is necessary to provide a new antenna system.

  The technical problem to be solved by the present invention is to provide an all-metal backshell antenna system that has good shielding, can maintain the maximum integrity of the metal backshell, and has a good appearance.

In order to solve the above-described technical problem, the present invention provides a metal back shell including a main body and a side wall that bends and extends from the main body, a circuit board having a main ground point, and the circuit board. A master antenna module and a small antenna module connected to each other, and a first side wall and a second side wall in which the side walls are installed opposite to each other, and a third side wall installed in a direction opposite to each other An all-metal backshell antenna system including a fourth sidewall,
The metal back shell includes a first slit located at a connection location between the first side wall and the main body portion, and a second slit located at a connection location between the second side wall and the main body portion. Is provided,
The first slit and the second slit include the metal back shell, a first metal part including the first side wall, a second metal part including the second side wall, Divided into a first metal part and a third metal part located between the second metal part,
The first metal part, the second metal part, and the third metal part are insulated from each other,
The first metal part includes an up slit penetrating an edge of the first side wall and the first slit through a shortest path, and the second metal part includes the second side wall through a shortest path. At least one bottom slit that penetrates the edge of the second slit and the second slit,
The master antenna module includes a matching circuit installed on the circuit board, a main feeding point, and at least one ground point, and the main feeding point is electrically connected to the first metal part, The ground point is electrically connected to the main ground point,
The small antenna module includes at least one small antenna unit, and the small antenna unit includes a feeding point installed on the circuit board and at least one ground point, and the feeding point is the second metal part. An all-metal backshell antenna system is provided, wherein the ground point is electrically connected to the main ground point.

  The up slit is installed close to the third side wall or the fourth side wall, and the main feeding point is electrically connected to the first metal part at a position far from the up slit. It is preferable to be connected.

  The matching circuit controls a first inductance, a first capacitance connected in parallel to the first inductance, and on / off of the first capacitance, so that the first capacitance A capacitance switch connected in series, a second capacitance connected in series to the first inductance, a second inductance connected in parallel to the second capacitance, and the first It is preferable to control whether or not the metal part is grounded, and to include a ground switch installed between the up slit and the main feeding point.

  It is preferable that the master antenna module has one ground point that is electrically connected to the first metal part at a position farther from the up slit than the main feeding point.

  The small antenna module preferably includes two small antenna units, which are a diversity antenna unit and a GPS / WIFI antenna unit, respectively.

  The diversity antenna unit and the GPS / WIFI antenna unit each have one feeding point electrically connected to the second metal part, and the two feeding points are the two bottom slits. Between the two feeding points, there are several ground units electrically connected to the second metal part, and the ground unit is electrically connected to the main ground point. It is preferable.

  The diversity antenna unit includes one ground point, and the feeding point and the ground point of the diversity antenna unit are electrically connected to the second metal part on both sides of the bottom slit near the feeding point of the diversity antenna unit. Are preferably connected.

  The GPS / WIFI antenna unit includes one ground point, and the feeding point and the ground point of the GPS / WIFI antenna unit are on both sides of the bottom slit near the GPS / WIFI antenna unit, respectively. It is preferable to be electrically connected to the part.

  The GPS / WIFI antenna unit preferably further includes a parasitic antenna located between the GPS / WIFI feeding point and the ground point.

  Preferably, the parasitic antenna is L-shaped, and one end of the parasitic antenna is grounded.

  In the all-metal backshell antenna system according to the present invention, the first slit is located at the connection point between the first side wall and the main part, and the second slit is located at the connection point between the second side wall and the main part. The entire metal back shell is divided into a first metal part as a master antenna module radiating part and a second metal part as a small antenna radiating part. For this reason, the integrity of the metal back shell can be kept to the maximum extent, and the overall structure looks good.

FIG. 1 is a schematic diagram showing the structure of an all-metal backshell antenna system of the present invention. FIG. 2 is a schematic diagram showing a structure in which the third metal portion is removed from the all-metal backshell antenna system of the present invention. FIG. 3 is a schematic perspective view showing a metal back shell of the all metal back shell antenna system of the present invention. FIG. 4 is a schematic perspective view of the metal back shell of the all metal back shell antenna system of the present invention as seen from another angle. FIG. 5 is an enlarged view of a portion A of FIG. 2 in the all-metal backshell antenna system of the present invention. FIG. 6 is a schematic diagram showing a matching circuit of the master antenna module of the all-metal backshell antenna system of the present invention. FIG. 7 is an enlarged view of a portion B in FIG. 2 in the all-metal backshell antenna system of the present invention. FIG. 8 is a graph showing frequency-gain characteristics of three operating states of the master antenna module of the all-metal backshell antenna system of the present invention. FIG. 9 is a graph showing frequency-efficiency characteristics of three operating states of the master antenna module of the all-metal backshell antenna system of the present invention. FIG. 10 is a graph showing frequency-gain characteristics of the diversity antenna unit of the all-metal backshell antenna system of the present invention. FIG. 11 is a graph showing frequency-efficiency characteristics of the diversity antenna unit of the all-metal backshell antenna system of the present invention. FIG. 12 is a graph showing the frequency-gain characteristics of the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention. FIG. 13 is a graph showing the frequency-efficiency characteristics of the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention. FIG. 14 is a graph showing the degree of shielding of the diversity antenna unit and the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention.

  Hereinafter, the present invention will be further described with reference to the drawings and embodiments.

  Please refer to FIG. 1 and FIG. FIG. 1 is a schematic diagram showing the structure of the all-metal backshell antenna system of the present invention, and FIG. 2 is a schematic diagram showing the structure of the all-metal backshell antenna system of the present invention with the third metal portion removed. is there.

  The all-metal backshell antenna system 1 includes a metal backshell 11, a circuit board 13, a master antenna module 15, and a small antenna module 17. The master antenna module 15 and the small antenna module 17 are electrically connected to the circuit board 13.

  FIG. 3 is a schematic perspective view showing a metal back shell of the all metal back shell antenna system of the present invention. FIG. 4 is a schematic perspective view of the metal back shell of the all metal back shell antenna system of the present invention as seen from another angle.

  As shown in FIGS. 3 and 4, the metal back shell 11 includes a main body portion 11a, a first side wall 11b, a second side wall 11c, a third side wall 11d, and a fourth side wall 11e. Is provided. The first side wall 11b, the second side wall 11c, the third side wall 11d, and the fourth side wall 11e are bent and extended from the main portion 11a, and the first side wall 11b and the second side wall 11c. Are installed relative to each other, and the third side wall 11d and the fourth side wall 11e are installed relative to each other.

  The metal back shell 11 is provided with two slits, a first slit 111 and a second slit 113, respectively, and the first slit 111 and the second slit 113 are different only in the positions where they are installed. Are the same. The lateral width of the first slit 111 and the second slit 113 is about 1.5 mm.

  The 1st slit 111 is located in the connection location of the 1st side wall 11b and the main-body part 11a, and the 2nd slit 113 is located in the connection location of the 2nd side wall 11c and the main-body part 11a. Specifically, the first slit 111 is located at a connecting portion between the first side wall 11b and the main body 11a, and both ends thereof are the first side wall 11b in the third side wall 11d and the fourth side wall 11e, respectively. It extends to the side edge approaching. The second slit 113 is located at a connecting portion between the second side wall 11c and the main body part 11a, and both ends of the second slit 113 come to the side edges of the third side wall 11d and the fourth side wall 11e that approach the second side wall 11c. Extend. The first slit 111 and the second slit 113 include the metal back shell 11, the first metal part 115 including the first side wall 11b, and the second metal part 117 including the second side wall 11c. And the third metal part 119 located between the first metal part 115 and the second metal part 117, and the first metal part 115, the second metal part 117, and the third metal The parts 119 are insulated from each other.

  The first metal part 115 and the second metal part 117 are used as a master antenna radiating part and a small antenna radiating part, respectively.

  FIG. 5 is a structural schematic diagram of the master antenna module 15 of the all-metal backshell antenna system of the present invention.

  The first metal part 115 includes a first side wall 11b, an up slit 1151, and a virtual fracture slit 1153. The up slit 1151 penetrates the edge of the first side wall 11b and the first slit 111 through the shortest path. The up slit 1151 can be installed close to the third side wall 11d or the fourth side wall 11e, but in the present embodiment, the up slit 1151 is installed close to the fourth side wall 11e.

  The virtual fracture slit 1153 is an insulating material coating and is applied to the surface of the first side wall 11b. The virtual fracture slit 1153 is installed to make the first metal part 115 and the second metal part 117 the same structure, and does not physically separate the first side wall 11b. The antenna signal is not affected.

  The master antenna module 15 includes a main feeding point 151, a matching circuit 153, and a ground point 155. The matching circuit 153 is installed on the circuit board 13. The main feeding point 151 is installed at a position far from the up slit 1151 and is electrically connected to the first metal part 115.

  FIG. 6 is a schematic diagram showing a matching circuit of the master antenna module of the all-metal backshell antenna system of the present invention.

  As shown in FIG. 6, the matching circuit 153 includes a ground switch 1531, a capacitance switch S1, a first inductance L1, a second inductance L2, a first capacitance C1, and a second capacitance. And a capacitance C2.

  The ground switch 1531 is installed between the up slit 1151 and the main feeding point 151 and controls whether or not the first metal part 115 is grounded. The first capacitance C1 is connected in parallel to the first inductance L1, and the capacitance switch S1 is connected in series to the first capacitance C1, and controls on / off of the first capacitance C1. . The second capacitance C2 is connected in series to the first inductance L1, and is connected in parallel to the second inductance L2.

  In the present embodiment, only one ground point 155 is installed, and it is installed at a position farther from the up slit 1151 than the main feeding point 151 and is electrically connected to the first metal part 115. The

  The master antenna module 15 can realize the three operating frequency bands of the master antenna module 15 by combining different states of the capacitance switch S1 and the ground switch 1531. Different states of the capacitance switch S1 and the ground switch 1531 are as follows.

  First state: Capacitance switch S1 and ground switch 1531 are both off. At this time, the main feeding point 151 or the ground point 155 is electrically connected to the first metal part 115, and the operating frequency band of the master antenna module 15 is GSM900 standard and 2300 MHz to 2400 MHz.

  Second state: Capacitance switch S1 and ground switch 1531 are both on. At this time, the main feeding point 151 or the ground point 155 is electrically connected to the first metal part 115, and the ground switch 1531 is electrically connected to the first metal part 115, and the operation of the master antenna module 15. The frequency bands are 1710 MHz to 2170 MHz and 2500 MHz to 2690 MHz.

  Third state: the capacitance switch S1 is in an off state, and the ground switch 1531 is in an on state. The operating frequency band of the all-metal backshell antenna system 1 is GSM850 standard and 2300 MHz to 2400 MHz.

  FIG. 8 is a graph showing frequency-gain characteristics of three operating states of the master antenna module of the all-metal backshell antenna system of the present invention. As can be seen from the frequency-gain characteristic glasses corresponding to the three operating states of the master antenna module 15, the three operating states of the master antenna module 15 all have good performance.

  FIG. 9 is a frequency-efficiency characteristic graph of the master antenna module of the all-metal backshell antenna system of the present invention.

The average efficiency corresponding to each operating frequency band is as follows:
In the case of the GSM850 standard, the average efficiency is 51.90%, in the case of the GSM900 standard, the average efficiency is 51.20%, in the case of 1710 MHz to 2170 MHz, the average efficiency is 64.90%, in the case of 2300 MHz to 2400 MHz, the average efficiency is 65 For 90%, 2500 MHz to 2690 MHz, the average efficiency is 63.30%.

  As can be seen from the average efficiency of the operating frequency band, the master antenna module 15 has good efficiency.

  FIG. 7 is a structural schematic diagram of a small antenna module of the all-metal backshell antenna system of the present invention. The second metal portion 117 includes a second side wall 11c and at least one bottom slit 1171. In the present embodiment, two bottom slits 1171 are provided with a gap therebetween.

  The bottom slit 1171 penetrates the edge of the second side wall 11c and the second slit 113 through the shortest path. Below, for convenience of explanation, the bottom slit 1171 is divided into a bottom slit 1171a approaching the fourth side wall 11e and a bottom slit 1171b approaching the third side wall 11d, and both differ only in position. Since the up slit 1151 and the virtual fracture slit 1153 are installed corresponding to the two bottom slits 1171, the entire metal backshell antenna system 1 has a better structure.

  The small antenna module 17 may include one or a plurality of small antenna units. In the present embodiment, the small antenna module 17 includes two small antenna units, a diversity antenna unit 171 and a GPS / WIFI antenna unit 173, respectively.

  The diversity antenna unit 171 includes a ground point 1711 and a feeding point 1713. At least one ground point 1711 is installed, and a plurality of ground points 1711 can realize a plurality of operating frequency bands of the diversity antenna unit 171. In the present embodiment, only one ground point 1711 is installed. The ground point 1711 and the feeding point 1713 are respectively installed on both sides of the bottom slit 1171a close to the feeding point 1713, and are electrically connected to the second metal part 117, respectively.

  The GPS / WIFI antenna unit 173 includes a ground point 1731, a parasitic antenna 1733, and a feeding point 1735. At least one ground point 1731 is installed and used to realize a plurality of frequency bands of the GPS / WIFI antenna unit. In the present embodiment, one ground point 1731 is not provided. The ground point 1731 and the feeding point 1713 are respectively installed on both sides of the bottom slit 1171b close to the feeding point 1735 and are electrically connected to the second metal portion 117, respectively. The parasitic antenna 1733 is L-shaped, one end thereof is grounded, and is located between the feeding point 1735 and the ground point 1731.

  Several ground units are installed between the feeding point 1713 of the diversity antenna unit 171 and the feeding point 1735 of the GPS / WIFI antenna unit 173. In the present embodiment, two ground units 1737 are located between the feeding point 1713 and the feeding point 1735. The ground unit 1737 may be a single conductor, and the second metal portion 117 is connected to the main ground point of the circuit board 13 so that the degree of shielding between the diversity antenna unit 171 and the GPS / WIFI antenna unit is increased. The signal interference between the two antenna units can be increased and reduced. Of course, the number of ground units is not limited to two, and the case where one, three or more ground units are installed is also included in the scope of the present invention for the same reason.

  Diversity antenna unit 171 has two operating frequencies of 1880 MHz and 2600 MHz, an operating frequency of 1880 MHz is generated by a parasitic antenna, and an operating frequency of 2600 MHz is generated by a PIFA antenna.

  FIG. 10 is a graph of frequency-gain characteristics in the diversity antenna unit of the all-metal backshell antenna system of the present invention. FIG. 11 is a frequency-efficiency characteristic curve diagram of the diversity antenna unit of the all-metal backshell antenna system of the present invention. Diversity antenna unit 171 has good gain and efficiency.

  The GPS / WIFI antenna unit 173 realized the four operating frequencies of 1560 MHz, 2440 MHz, 5550 MHz, and 5820 MHz by adjusting the capacitance value and the inductance value. An operating frequency of 1560 MHz is generated by the PIFA antenna, an operating frequency of 2440 MHz is generated by the parasitic antenna, an operating frequency of 5550 MHz is generated by the PIFA higher-order antenna, and an operating frequency of 5820 MHz is generated by the parasitic antenna 1733.

  FIG. 12 is a graph showing frequency-gain characteristics of the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention. FIG. 13 is a graph showing the frequency-efficiency characteristics of the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention. The GPS / WIFI antenna unit 173 has good gain and efficiency.

  FIG. 14 is a graph of the shielding degree of the diversity antenna unit and the GPS / WIFI antenna unit of the all-metal backshell antenna system of the present invention. The diversity antenna unit 171 and the GPS / WIFI antenna unit 173 share the second metal part 117 as a radiating part, and have a shielding degree of many frequency bands in addition to a relatively poor shielding degree near the GPS antenna. Good and radiation effect is ideal.

  As described above, in the all-metal backshell antenna system 1 according to the present invention, the first slit 111 is located at the connection point between the first slit 11b and the main body 11a, and the second slit 113 is the second slit 113. It is located in the connection location of the side wall 11c and the main-body part 11a. For this reason, the entire metal back shell 11 is divided into a first metal portion 115 as a master antenna module radiating portion and a second metal portion 117 as a small antenna radiating portion. The maximum limit can be maintained, and the overall appearance is good.

  The above description is only an embodiment of the present invention, and those skilled in the art can make further improvements without departing from the inventive concept of the present invention. Belongs to a range.

Claims (7)

  1. A metal back shell comprising a main body and a side wall bent from the main body, a circuit board having a main ground point, a master antenna module electrically connected to the circuit board, and a small antenna module An all-metal backshell antenna system comprising: a first sidewall and a second sidewall disposed opposite to each other; and a third sidewall and a fourth sidewall disposed opposite to each other. There,
    The metal back shell includes a first slit located at a connection location between the first side wall and the main body portion, and a second slit located at a connection location between the second side wall and the main body portion. Is provided,
    The first slit and the second slit include the metal back shell, a first metal part including the first side wall, a second metal part including the second side wall, Divided into a first metal part and a third metal part located between the second metal part,
    The first metal part, the second metal part, and the third metal part are insulated from each other,
    The first metal part includes an up slit penetrating the first side wall and the first slit, and the second metal part includes the second side wall and the second slit. Contains at least one bottom slit that passes through,
    The master antenna module includes a matching circuit installed on the circuit board, a main feeding point, and at least one ground point, and the main feeding point is electrically connected to the first metal part, A ground point is electrically connected to the main ground point;
    The small antenna module includes at least one small antenna unit, and the small antenna unit includes a feeding point installed on the circuit board and at least one ground point, and the feeding point is the second metal part. And the ground point is electrically connected to the main ground point ;
    Both ends of the first slit extend to side edges of the third side wall and the fourth side wall that approach the first side wall, and both ends of the second slit respectively 3 side walls and a side edge approaching the second side wall of the fourth side wall,
    The small antenna module includes two small antenna units, which are a diversity antenna unit and a GPS / WIFI antenna unit, respectively.
    The diversity antenna unit and the GPS / WIFI antenna unit each have one feeding point electrically connected to the second metal part, and the two feeding points are the two bottom slits. Between the two feeding points, there are several ground units electrically connected to the second metal part, and the ground unit is electrically connected to the main ground point. And
    The diversity antenna unit includes one ground point, and the feeding point of the diversity antenna unit and the ground point are respectively located on both sides of the bottom slit in the vicinity of the feeding point of the diversity antenna unit. All-metal backshell antenna system characterized by being electrically connected to
  2. The up slit is installed close to the third side wall or the fourth side wall, and the main feeding point is electrically connected to the first metal part at a position away from the up slit. The all-metal backshell antenna system of claim 1, wherein:
  3.   The matching circuit controls a first inductance, a first capacitance connected in parallel to the first inductance, and on / off of the first capacitance, so that the first capacitance A capacitance switch connected in series, a second capacitance connected in series to the first inductance, a second inductance connected in parallel to the second capacitance, and the first The all-metal backshell antenna system according to claim 2, further comprising: a ground switch that controls whether or not a metal part is grounded and is installed between the up slit and the main feeding point.
  4. The all-metal backshell according to claim 2, wherein the master antenna module has one ground point that is electrically connected to the first metal part at a position farther from the up slit than the main feeding point. Antenna system.
  5. A metal back shell comprising a main body and a side wall bent from the main body, a circuit board having a main ground point, a master antenna module electrically connected to the circuit board, and a small antenna module An all-metal backshell antenna system comprising: a first sidewall and a second sidewall disposed opposite to each other; and a third sidewall and a fourth sidewall disposed opposite to each other. There,
    The metal back shell includes a first slit located at a connection location between the first side wall and the main body portion, and a second slit located at a connection location between the second side wall and the main body portion. Is provided,
    The first slit and the second slit include the metal back shell, a first metal part including the first side wall, a second metal part including the second side wall, Divided into a first metal part and a third metal part located between the second metal part,
    The first metal part, the second metal part, and the third metal part are insulated from each other,
    The first metal part includes an up slit penetrating the first side wall and the first slit, and the second metal part includes the second side wall and the second slit. Contains at least one bottom slit that passes through,
    The master antenna module includes a matching circuit installed on the circuit board, a main feeding point, and at least one ground point, and the main feeding point is electrically connected to the first metal part, A ground point is electrically connected to the main ground point;
    The small antenna module includes at least one small antenna unit, and the small antenna unit includes a feeding point installed on the circuit board and at least one ground point, and the feeding point is the second metal part. And the ground point is electrically connected to the main ground point;
    Both ends of the first slit extend to side edges of the third side wall and the fourth side wall that approach the first side wall, and both ends of the second slit respectively 3 side walls and a side edge approaching the second side wall of the fourth side wall,
    The small antenna module includes two small antenna units, which are a diversity antenna unit and a GPS / WIFI antenna unit, respectively.
    The diversity antenna unit and the GPS / WIFI antenna unit each have one feeding point electrically connected to the second metal part, and the two feeding points are the two bottom slits. Between the two feeding points, there are several ground units electrically connected to the second metal part, and the ground unit is electrically connected to the main ground point. And
    The GPS / WIFI antenna unit has one ground point, and the feeding point and the ground point of the GPS / WIFI antenna unit are located on both sides of the bottom slit in the vicinity of the GPS / WIFI antenna unit, respectively. An all-metal backshell antenna system characterized in that it is electrically connected to the metal part.
  6. The all-metal backshell antenna system according to claim 5 , wherein the GPS / WIFI antenna unit further includes a parasitic antenna positioned between a feeding point of the GPS / WIFI and the ground point.
  7. The all-metal backshell antenna system according to claim 6 , wherein the parasitic antenna is L-shaped, and one end of the parasitic antenna is grounded.

JP2016119329A 2015-10-26 2016-06-15 All-metal backshell antenna system Active JP6298104B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201510700646.5A CN105305066B (en) 2015-10-26 2015-10-26 All-metal dorsal shield antenna system
CN201510700646.5 2015-10-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15/283,530 US10374287B2 (en) 2015-10-26 2016-10-03 Antenna system with full metal back cover

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Publication Number Publication Date
JP2017085541A JP2017085541A (en) 2017-05-18
JP6298104B2 true JP6298104B2 (en) 2018-03-20

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