CN108232407B - LTE antenna based on comprehensive screen metal frame - Google Patents
LTE antenna based on comprehensive screen metal frame Download PDFInfo
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- CN108232407B CN108232407B CN201711215264.9A CN201711215264A CN108232407B CN 108232407 B CN108232407 B CN 108232407B CN 201711215264 A CN201711215264 A CN 201711215264A CN 108232407 B CN108232407 B CN 108232407B
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- 239000002184 metal Substances 0.000 title claims abstract description 111
- 239000003990 capacitor Substances 0.000 claims description 34
- 238000004891 communication Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002411 adverse Effects 0.000 abstract description 4
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Abstract
The invention discloses an LTE antenna based on a comprehensive screen metal frame, which comprises a metal frame and a metal layer, wherein the metal layer is arranged in the metal frame, two side edges of the metal frame are symmetrically provided with two slits, the antenna also comprises a PCB (printed circuit board), a first tuning network and a second tuning network, the PCB is arranged in the metal frame, a copper-clad area and a clearance area are arranged on the PCB, the clearance area is arranged close to the bottom edge of the metal frame, and the copper-clad area is electrically connected with the metal layer; the first tuning network and the second tuning network are respectively arranged in the clearance area, the first tuning network is connected with the bottom edge of the metal frame, and the second tuning network is respectively electrically connected with the bottom edge of the metal frame and the copper-clad area. The PCB with a larger clearance area is arranged, the first tuning network and the second tuning network are arranged in the clearance area of the PCB, and the LTE antenna can cover the 700-960MHz low frequency band and the 1700-2700MHz high frequency band by adjusting the first tuning network and the second tuning network, so that the adverse effect on the performance of the LTE antenna caused by too small clearance between the bottom edge of the metal frame and the metal layer in the full-screen mobile phone is eliminated.
Description
Technical Field
The present invention relates to an antenna for a mobile communication terminal, and more particularly, to an LTE antenna based on a full screen metal frame.
Background
The full screen brings about a rolling motion once it is made by virtue of its high screen ratio. As is well known, there is a metal layer below the mobile phone screen (because of different assembly modes of mobile phones, the metal layer is a metal middle frame in the mobile phone or a metal shielding layer closely attached to the screen), and its effect mainly has three points: 1. the screen is protected, and the strength is increased; 2. shielding the interference of external signals to the display screen; 3. grounding each interfering signal, such as noise, electrostatically; when the comprehensive screen has higher screen duty ratio, the metal layer at the lower part of the comprehensive screen also needs to extend towards the top and the bottom of the mobile phone, so that the clearance of the mobile phone antenna is greatly reduced, the clearance of the antenna is less than 2mm, and the design difficulty of the antenna is increased.
Fig. 1 is a schematic diagram of a full-screen mobile phone structure, in which 200 is a metal layer below a screen (for simplicity, hereinafter referred to as a metal layer), 100 is a lower metal frame of the mobile phone, 101 is a left metal frame of the mobile phone, 102 is a right metal frame of the mobile phone, 103 is an upper metal frame of the mobile phone, and 303 is a USB, and it can be seen from the figure that the metal layer 200 is very close to the lower metal frame 100 and the upper metal frame 103, so that the antenna headroom is less than 2mm (the antenna headroom is one of the most important factors affecting the current antenna design, the antenna headroom is larger, the antenna is easier to design, and the performance is better), which greatly increases the difficulty of the antenna design.
Because the clearance area is too small, the LTE antenna in the existing full-screen mobile phone has the problem that the LTE full-frequency band cannot be covered.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: an LTE antenna based on a full screen metal frame is provided, which can cover 700-960MHz low frequency band and 1700-2700MHz high frequency band with a small headroom.
In order to solve the technical problems, the invention adopts the following technical scheme: the LTE antenna based on the comprehensive screen metal frame comprises a metal frame and a metal layer, wherein the metal layer is arranged in the metal frame, two side edges of the metal frame are symmetrically provided with two slits, the LTE antenna further comprises a PCB (printed circuit board), a first tuning network and a second tuning network, the PCB is arranged in the metal frame, a copper-clad area and a clearance area are arranged on the PCB, the clearance area is arranged close to the bottom edge of the metal frame, and the copper-clad area is electrically connected with the metal layer; the first tuning network and the second tuning network are respectively arranged in the clearance area, the first tuning network is connected with the bottom edge of the metal frame, and the second tuning network is respectively electrically connected with the bottom edge of the metal frame and the copper-clad area.
The invention has the beneficial effects that: the PCB with a larger clearance area is arranged, the first tuning network and the second tuning network are arranged in the clearance area of the PCB, and the LTE antenna can cover the 700-960MHz low frequency band and the 1700-2700MHz high frequency band by adjusting the first tuning network and the second tuning network, so that the adverse effect on the performance of the LTE antenna caused by too small clearance between the bottom edge of the metal frame and the metal layer in the full-screen mobile phone is eliminated.
Drawings
FIG. 1 is a schematic diagram of the internal structure of a prior art full-screen metal frame cell phone;
fig. 2 is a schematic diagram of an overall structure of a mobile phone based on a full-screen metal frame according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a PCB board in a mobile phone based on a full screen metal frame according to the first embodiment of the present invention;
fig. 4 is a schematic diagram of connection of parts in an LTE antenna based on a full-screen metal frame mobile phone according to the first embodiment of the present invention;
fig. 5 is an S11 test result diagram of an LTE antenna based on a full screen metal frame mobile phone according to the first embodiment of the present invention;
fig. 6 is a diagram of an efficiency test result of an LTE antenna based on a full screen metal frame mobile phone according to the first embodiment of the present invention.
Description of the reference numerals:
1. a metal frame; 11. a side edge; 12. slotting; 13. a bottom edge; 2. a metal layer; 3. a PCB board;
31. a copper-clad region; 32. a clearance area; 4. a first tuning network; 5. a second tuning network;
6. a feeding point; 7. a USB interface; 81. a first inductance; 82. a second inductor; 83. a third inductance;
84. a fourth inductance; 85. a fifth inductance; 86. a sixth inductance; 87. a seventh inductance;
88. a first capacitor; 89. and a second capacitor.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
The most critical concept of the invention is as follows: the PCB with the clearance area, the first tuning network and the second tuning network are additionally arranged, and the LTE antenna can cover the 700-960MHz low frequency band and the 1700-2700MHz high frequency band by adjusting the first tuning network and the second tuning network.
Referring to fig. 2 to 6, the LTE antenna based on a full screen metal frame includes a metal frame 1 and a metal layer 2, the metal layer 2 is disposed in the metal frame 1, two side edges 11 of the metal frame 1 are symmetrically provided with two slits 12, the LTE antenna further includes a PCB 3, a first tuning network 4 and a second tuning network 5, the PCB 3 is disposed in the metal frame 1, a copper-clad area 31 and a clearance area 32 are disposed on the PCB 3, the clearance area 32 is disposed near a bottom edge 13 of the metal frame 1, and the copper-clad area 31 is electrically connected with the metal layer 2; the first tuning network 4 and the second tuning network 5 are respectively arranged in the clearance area 32, the first tuning network 4 is connected with the bottom edge 13 of the metal frame 1, and the second tuning network 5 is respectively electrically connected with the bottom edge 13 of the metal frame 1 and the copper-clad area 31.
From the above description, the beneficial effects of the invention are as follows: the PCB with a larger clearance area is arranged, the first tuning network and the second tuning network are arranged in the clearance area of the PCB, and the LTE antenna can cover the 700-960MHz low frequency band and the 1700-2700MHz high frequency band by adjusting the first tuning network and the second tuning network, so that the adverse effect on the performance of the LTE antenna caused by too small clearance between the bottom edge of the metal frame and the metal layer in the full-screen mobile phone is eliminated.
Further, the antenna feed point 6 is arranged in the headroom region 32, and the first tuning network 4 is communicated with the antenna feed point 6.
Further, the first tuning network 4 includes a single-pole double-throw switch SW1, a matching network MC2, and a single-pole double-throw switch SW2, where an RFC port of the single-pole double-throw switch SW1 is communicated with the feeding point 6, an RF1 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC1, and an RF2 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC 2; the RFC port of the single pole double throw switch SW2 is communicated with the bottom edge 13 of the metal frame 1, the RF1 port of the single pole double throw switch SW2 is communicated with the other end of the matching network MC1, and the RF2 port of the single pole double throw switch SW2 is communicated with the other end of the matching network MC 2.
Further, the matching network MC1 includes a first capacitor 88, a first inductor 81 and a second inductor 82, where the first inductor 81 is connected to the second inductor 82, one end of the first capacitor 88 is connected to one end of the first inductor 81 near the second inductor 82, the other end of the first capacitor 88 is connected to the copper-clad area 31, one end of the first inductor 81 far from the first capacitor 88 is connected to the RF1 port of the single pole double throw switch SW1, and one end of the second inductor 82 far from the first capacitor 88 is connected to the RF1 port of the single pole double throw switch SW 2.
Further, the matching network MC2 includes a third inductor 83, a second capacitor 89, and a fourth inductor 84, where the third inductor 83 and the fourth inductor 84 are respectively connected to the copper-clad area 31, one end of the second capacitor 89 is connected to the third inductor 83, and the other end of the second capacitor 89 is connected to the fourth inductor 84; one end of the third inductor 83 near the second capacitor 89 is communicated with the RF2 port of the single pole double throw switch SW1, and one end of the fourth inductor 84 near the second capacitor 89 is communicated with the RF2 port of the single pole double throw switch SW 2.
Further, the second tuning network 5 includes a single-pole four-throw switch SW3, a fifth inductor 85, a sixth inductor 86 and a seventh inductor 87, where the RFC port of the single-pole four-throw switch SW3 is communicated with the bottom side 13 of the metal frame 1, and the fifth inductor 85, the sixth inductor 86 and the seventh inductor 87 are respectively communicated with the copper-clad area 31; the RF1 port of the single pole, four throw switch SW3 communicates with the fifth inductor 85, the RF2 port of the single pole, four throw switch SW3 communicates with the sixth inductor 86, and the RF3 port of the single pole, four throw switch SW3 communicates with the seventh inductor 87.
Further, the second tuning network 5 further includes an eighth inductor, one end of which is in communication with the copper-clad region 31, and the other end of which is in communication with the RF4 port of the single-pole four-throw switch SW 3.
From the above description, it can be seen that the eighth inductor can be selectively set when the LTE antenna is required to cover the common frequency band (746-791 MHz), i.e., to realize full-band coverage.
Further, a USB interface 7 is further disposed in the clearance area 32.
Further, the width of the slit 12 is 1.0-2.0mm.
Further, both side edges 11 of the metal frame 1 are electrically connected to the metal layer 2, respectively.
Example 1
Referring to fig. 2 to 6, a first embodiment of the present invention is as follows: the LTE antenna based on the comprehensive screen metal frame comprises a metal frame 1 and a metal layer 2, wherein the metal layer 2 is arranged in the metal frame 1, two side edges 11 of the metal frame 1 are symmetrically provided with two slots 12, the LTE antenna further comprises a PCB 3, a first tuning network 4 and a second tuning network 5, the PCB 3 is arranged in the metal frame 1, a copper-clad area 31 and a clearance area 32 are arranged on the PCB 3, the clearance area 32 is arranged close to the bottom edge 13 of the metal frame 1, and the copper-clad area 31 is electrically connected with the metal layer 2; the first tuning network 4 and the second tuning network 5 are respectively arranged in the clearance area 32, the first tuning network 4 is connected with the bottom edge 13 of the metal frame 1, and the second tuning network 5 is respectively electrically connected with the bottom edge 13 of the metal frame 1 and the copper-clad area 31.
And the antenna feed point 6 is arranged in the clearance area 32, and the first tuning network 4 is communicated with the antenna feed point 6.
As shown in fig. 4, the first tuning network 4 includes a single-pole double-throw switch SW1, a matching network MC2, and a single-pole double-throw switch SW2, where an RFC port of the single-pole double-throw switch SW1 is communicated with the feeding point 6, an RF1 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC1, and an RF2 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC 2; the RFC port of the single pole double throw switch SW2 is communicated with the bottom edge 13 of the metal frame 1, the RF1 port of the single pole double throw switch SW2 is communicated with the other end of the matching network MC1, and the RF2 port of the single pole double throw switch SW2 is communicated with the other end of the matching network MC 2.
The matching network MC1 includes a first capacitor 88, a first inductor 81 and a second inductor 82, where the first inductor 81 is communicated with the second inductor 82, one end of the first capacitor 88 is communicated with one end of the first inductor 81 close to the second inductor 82, the other end of the first capacitor 88 is communicated with the copper-clad area 31, one end of the first inductor 81 far away from the first capacitor 88 is communicated with the RF1 port of the single-pole double-throw switch SW1, and one end of the second inductor 82 far away from the first capacitor 88 is communicated with the RF1 port of the single-pole double-throw switch SW 2.
The matching network MC2 includes a third inductor 83, a second capacitor 89, and a fourth inductor 84, where the third inductor 83 and the fourth inductor 84 are respectively connected to the copper-clad region 31, one end of the second capacitor 89 is connected to the third inductor 83, and the other end of the second capacitor 89 is connected to the fourth inductor 84; one end of the third inductor 83 near the second capacitor 89 is communicated with the RF2 port of the single pole double throw switch SW1, and one end of the fourth inductor 84 near the second capacitor 89 is communicated with the RF2 port of the single pole double throw switch SW 2.
The second tuning network 5 comprises a single-pole four-throw switch SW3, a fifth inductor 85, a sixth inductor 86 and a seventh inductor 87, wherein the RFC port of the single-pole four-throw switch SW3 is communicated with the bottom edge 13 of the metal frame 1, and the fifth inductor 85, the sixth inductor 86 and the seventh inductor 87 are respectively communicated with the copper-clad area 31; the RF1 port of the single pole, four throw switch SW3 communicates with the fifth inductor 85, the RF2 port of the single pole, four throw switch SW3 communicates with the sixth inductor 86, and the RF3 port of the single pole, four throw switch SW3 communicates with the seventh inductor 87.
Optionally, the second tuning network 5 further includes an eighth inductor, one end of which is in communication with the copper-clad region 31, and the other end of which is in communication with the RF4 port of the single-pole four-throw switch SW 3.
A USB interface 7 is also arranged in the clearance area 32; the width of the slit 12 is 1.0-2.0mm; the two sides 11 of the metal frame 1 are electrically connected to the metal layer 2, respectively.
In the present embodiment, the value of the first inductor 81 is 5.6nH, the value of the second inductor 82 is 10nH, the value of the third inductor 83 is 1nH, the value of the fourth inductor 84 is 3nH, the value of the fifth inductor 85 is 5.6nH, the value of the sixth inductor 86 is 2nH, and the value of the seventh inductor 87 is 1.5nH; the value of the first capacitor 88 is 1.8pF and the value of the second capacitor 89 is 1.5pF.
The switch state and implementation mode of each frequency band of the antenna are as follows:
low frequency band 700-746MHz:
switch state: the "knife" inside the single-pole double-throw switch SW1 is switched to its RF1 port, the "knife" inside the single-pole double-throw switch SW2 is switched to its RF1 port, and the "knife" inside the single-pole four-throw switch SW3 is switched to its RF1 port and is connected to the fifth inductor 85;
the implementation mode is as follows: the electrical signal is fed from the feed point 6 to the first tuning network 4, wherein the single-pole double-throw switches SW1/SW2 are switched to the respective RF1 ports to enable the matching network MC1 to be accessed, the signal is transmitted to the bottom side 13 of the metal frame 1 after passing through the matching network MC1 and then to the second tuning network 5, wherein the single-pole double-throw switch SW3 is switched to the RF1 ports thereof to introduce the signal to the fifth inductor 85 and then to the copper-clad area 31 of the PCB 3, i.e. "ground". The S11 for this state is shown in dashed lines in FIG. 5, and the efficiency corresponds to the 700-746MHz segment curve in FIG. 6. The fifth inductor 85 has the following functions: lengthening the transmission path length of the electric signal to generate resonance in the corresponding frequency range 700-746 MHz; the matching network MC1 functions as: the input impedance of the antenna matched with the corresponding frequency band 700-746MHz is close to 50Ω, thereby reducing the power reflection of the feed port and improving the efficiency of the antenna system as much as possible.
Low frequency band 791-960MHz:
switch state: the "knife" inside the single-pole double-throw switch SW1 is switched to its RF1 port, the "knife" inside the single-pole double-throw switch SW2 is switched to its RF1 port, and the "knife" inside the single-pole four-throw switch SW3 is switched to its RF2 port connected to the sixth inductor 86;
the implementation mode is as follows: the electrical signal is fed from the feed point 6 to the first tuning network 4, wherein the single-pole double-throw switch SW1/SW2 is switched to the respective RF1 port to switch in the matching network MC1, the signal is transmitted to the bottom side 13 of the metal frame 1 after passing through the matching network MC1, and then is transmitted to the second tuning network 5, wherein the single-pole double-throw switch SW3 is switched to the RF2 port thereof to introduce the signal to the sixth inductor 86 and then to the copper-clad area 31 of the PCB board 3, i.e. "ground". The S11 for this state is shown in solid lines in FIG. 5, and the efficiency corresponds to the 791-960MHz segment curve in FIG. 6. The sixth inductor 86 functions as: lengthening the transmission path length of the electric signal to enable the electric signal to generate resonance in a corresponding frequency range 791-960 MHz; the matching network MC1 functions as: the input impedance of the antenna matched with the corresponding frequency band 791-960MHz is close to 50Ω, thereby reducing the power reflection of the feed port and improving the efficiency of the antenna system as much as possible.
High band 1700-2700MHz:
switch state: the "knife" inside the single-pole double-throw switch SW1 is switched to its RF2 port, the "knife" inside the single-pole double-throw switch SW2 is switched to its RF2 port, the "knife" inside the single-pole four-throw switch SW3 is switched to its RF3 port and the seventh inductor 87 is connected;
the implementation mode is as follows: the electrical signal is fed from the feed point 6 to the first tuning network 4, wherein the single-pole double-throw switch SW1/SW2 is switched to the respective RF2 port to switch in the matching network MC2, the signal is transmitted to the bottom side 13 of the metal frame 1 after passing through the matching network MC2, and then is transmitted to the second tuning network 5, wherein the single-pole double-throw switch SW3 is switched to the RF3 port thereof to introduce the signal to the seventh inductor 87 and then to the copper-clad area 31 of the PCB board 3, i.e. "ground". The S11 corresponding to this state is shown in dotted line in FIG. 5, and the efficiency corresponds to the 1700-2700MHz segment curve in FIG. 6. The seventh inductor 87 has the following function: lengthening the transmission path length of the electric signal to generate resonance in the corresponding frequency band 1700-2700 MHz; the matching network MC2 functions as: the input impedance of the antenna matched with the corresponding frequency band 1700-2700MHz is close to 50Ω, thereby reducing the power reflection of the feed port and improving the efficiency of the antenna system as much as possible.
In summary, according to the LTE antenna based on the comprehensive screen metal frame provided by the invention, the PCB with a larger clearance area is arranged, the first tuning network and the second tuning network are arranged in the clearance area of the PCB, and the LTE antenna can cover the 700-960MHz low frequency band and the 1700-2700MHz high frequency band by adjusting the first tuning network and the second tuning network, so that adverse effects on the performance of the LTE antenna caused by too small gaps between the bottom edge of the metal frame and the metal layer in the comprehensive screen mobile phone are eliminated; when the LTE antenna is required to achieve full-band coverage, the eighth inductor may be optionally set in the second tuning network.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (7)
1. LTE antenna based on comprehensive screen metal frame, including metal frame and metal layer, the metal layer sets up in the metal frame, two side symmetries of metal frame are equipped with two slotting, its characterized in that: the PCB is arranged in the metal frame, a copper-clad area and a clearance area are arranged on the PCB, the clearance area is arranged close to the bottom edge of the metal frame, and the copper-clad area is electrically connected with the metal layer; the first tuning network and the second tuning network are respectively arranged in the clearance area, the first tuning network is connected with the bottom edge of the metal frame, and the second tuning network is respectively electrically connected with the bottom edge of the metal frame and the copper-clad area;
the first tuning network is communicated with the feeding point;
the first tuning network comprises a single-pole double-throw switch SW1, a matching network MC2 and a single-pole double-throw switch SW2, wherein the RFC port of the single-pole double-throw switch SW1 is communicated with the feed point, the RF1 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC1, and the RF2 port of the single-pole double-throw switch SW1 is communicated with one end of the matching network MC 2; the RFC port of the single-pole double-throw switch SW2 is communicated with the bottom edge of the metal frame, the RF1 port of the single-pole double-throw switch SW2 is communicated with the other end of the matching network MC1, and the RF2 port of the single-pole double-throw switch SW2 is communicated with the other end of the matching network MC 2;
the second tuning network comprises a single-pole four-throw switch SW3, a fifth inductor, a sixth inductor and a seventh inductor, wherein an RFC port of the single-pole four-throw switch SW3 is communicated with the bottom edge of the metal frame, and the fifth inductor, the sixth inductor and the seventh inductor are respectively communicated with the copper-clad area; the RF1 port of the single-pole four-throw switch SW3 is in communication with the fifth inductor, the RF2 port of the single-pole four-throw switch SW3 is in communication with the sixth inductor, and the RF3 port of the single-pole four-throw switch SW3 is in communication with the seventh inductor.
2. The full screen metal frame based LTE antenna of claim 1 wherein: the matching network MC1 comprises a first capacitor, a first inductor and a second inductor, wherein the first inductor is communicated with the second inductor, one end of the first capacitor is communicated with one end of the first inductor, which is close to the second inductor, the other end of the first capacitor is communicated with the copper-clad area, one end of the first inductor, which is far away from the first capacitor, is communicated with the RF1 port of the single-pole double-throw switch SW1, and one end of the second inductor, which is far away from the first capacitor, is communicated with the RF1 port of the single-pole double-throw switch SW 2.
3. The full screen metal frame based LTE antenna of claim 1 wherein: the matching network MC2 comprises a third inductor, a second capacitor and a fourth inductor, wherein the third inductor and the fourth inductor are respectively communicated with the copper-clad area, one end of the second capacitor is communicated with the third inductor, and the other end of the second capacitor is communicated with the fourth inductor; one end of the third inductor, which is close to the second capacitor, is communicated with the RF2 port of the single-pole double-throw switch SW1, and one end of the fourth inductor, which is close to the second capacitor, is communicated with the RF2 port of the single-pole double-throw switch SW 2.
4. The full screen metal frame based LTE antenna of claim 1 wherein: the second tuning network further comprises an eighth inductor, one end of the eighth inductor is communicated with the copper-clad area, and the other end of the eighth inductor is communicated with the RF4 port of the single-pole four-throw switch SW 3.
5. The full screen metal frame based LTE antenna of claim 1 wherein: and a USB interface is also arranged in the clearance area.
6. The full screen metal frame based LTE antenna of claim 1 wherein: the width of the slit is 1.0-2.0mm.
7. The full screen metal frame based LTE antenna of claim 1 wherein: two sides of the metal frame are respectively and electrically connected with the metal layer.
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| CN201711215264.9A CN108232407B (en) | 2017-11-28 | 2017-11-28 | LTE antenna based on comprehensive screen metal frame |
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| CN201711215264.9A CN108232407B (en) | 2017-11-28 | 2017-11-28 | LTE antenna based on comprehensive screen metal frame |
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| CN108232407B true CN108232407B (en) | 2023-12-19 |
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| CN110970709B (en) * | 2018-09-28 | 2022-02-11 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with same |
| CN110011025B (en) * | 2018-12-29 | 2021-03-26 | 瑞声科技(新加坡)有限公司 | Antenna system and mobile terminal |
| CN113241517A (en) * | 2021-05-10 | 2021-08-10 | 南昌黑鲨科技有限公司 | Split-feed type mobile phone antenna |
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