CN204966668U - Metal frame LTE antenna - Google Patents
Metal frame LTE antenna Download PDFInfo
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- CN204966668U CN204966668U CN201520616390.5U CN201520616390U CN204966668U CN 204966668 U CN204966668 U CN 204966668U CN 201520616390 U CN201520616390 U CN 201520616390U CN 204966668 U CN204966668 U CN 204966668U
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- metal frame
- antenna
- pass filter
- band pass
- ground plate
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- 239000002184 metal Substances 0.000 title claims abstract description 72
- 238000013461 design Methods 0.000 abstract description 10
- 230000005855 radiation Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- VEMKTZHHVJILDY-UHFFFAOYSA-N resmethrin Chemical compound CC1(C)C(C=C(C)C)C1C(=O)OCC1=COC(CC=2C=CC=CC=2)=C1 VEMKTZHHVJILDY-UHFFFAOYSA-N 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model discloses a metal frame LTE antenna, including a metal frame and a ground plate, the ground plate sets up in the metal frame, be equipped with headroom district in the metal frame, the both sides limit symmetry of metal frame is equipped with two and cracks, be equipped with a band pass filter in the headroom district, band pass filter one end is connected the metal frame, the other end is connected the ground plate. The utility model discloses only utilize the metal frame as the antenna radiation component to adopt a passive band pass filter and an additional inductance and a matching circuit to realize full LTE's function frequently, compare with prior art's active band switch, the antenna simple structure has, with low costs, occupation space is little, has reduced the design and has made the complexity, and can cover whole LTE frequency band.
Description
Technical field
The utility model relates to the communications field, particularly relates to a kind of full range LTE antenna with metal frame handheld device.
Background technology
Along with the fast development of LTE (longtermevolution) technology, increasing portable set can support LTE function, LTE technology to the beamwidth of antenna in the requirement of low-frequency range and high band normally at 698-960MHz and 1.710-2.690GHz.On the other hand, in order to increase the outward appearance of mobile device, the portable equipment of metal outer frame is widely used.Recently, antenna based on metal framework is suggested, but in the antenna of great majority based on metal framework, metal framework is only as a part for radiating element of antenna, this means that antenna also comprises the radiant element of other metallic member as main antenna, in this case, the electromagnetic field couples between metal framework and the radiating element of antenna on antenna carrier or interaction are very strong, and this will increase the difficulty of Antenna Design.In addition, this Antenna Design (even when using match circuit) is difficult to reach all frequency ranges covering LTE, is positioned at also for radiating element of antenna will increase the cost of antenna and manufacture complexity on antenna carrier simultaneously.Therefore, if can be optimal as unique radiating element of antenna using metal framework, not only simplify the process of Antenna Design, also reduce cost and manufacture complexity.
Recently, although some can support that the antenna of the mobile phone of LTE (such as IPHONE6) only uses metal framework as the radiant element of antenna, but in order to cover whole LTE frequency band, usually need to utilize an energy whole frequency range be divided into several frequency sub-band band switch and for regulating the tunable capacitor of resonance frequency, frequency band switching is carried out by active band switch, sometimes the active tunable capacitor for adjusting antenna resonant frequency will use with band switch simultaneously, the use of this band switch and adjustable condenser not only makes complex structure, take up room large, and also make to cover the frequency range with wider bandwidth under certain specific on off state due to the segmentation of frequency band, such as LTE frequency range 28.Active Antenna Configurations is commonly referred to as the antenna structure employing active element (such as band switch and adjustable condenser) in Antenna Design.Due to the above-mentioned existing shortcoming and defect based on metal frame LTE antenna technology, be necessary research or develop a kind of more convenient full range LTE antenna based on metal frame succinctly.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of structure simple, take up room little, only can cover the metal frame LTE passive antenna structure of whole LTE frequency band using metal framework as radiating element of antenna.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of metal frame LTE antenna, comprise a metal frame and a ground plate, described ground plate is arranged in described metal frame, be provided with a headroom district in described metal frame, the dual-side of described metal frame is arranged with two and cracks; Be provided with a passive bandpass filters in described headroom district, described band pass filter one end connects described metal frame, and the other end connects described ground plate.
Further, be also provided with an additional inductor in described headroom district, described additional inductor one end connects described metal frame, and the other end connects described ground plate.
Further, a USB interface is also provided with in described headroom district.
Further, described passive bandpass filters and described additional inductor lay respectively at the both sides of described USB interface.
Further, described band pass filter comprises the inductance and an electric capacity that are connected in series.
Further, an antenna feed point is also provided with in described headroom district.
Further, described antenna feed point is connected to described metal frame by a match circuit.
Further, described two crack and are positioned at described headroom district and described ground plate joint.
Further, described two width cracked are 1.0-2.0mm.
The beneficial effects of the utility model are: only utilize metal frame as radiating element of antenna, and adopt passive device as the band pass filter be made up of inductance and electric capacity and an additional inductor, achieve and only design by the full frequency band LTE antenna of becket as antenna radiator.Compared with existing active antenna technology, it is simple that the utility model has structure, and cost is low, takes up room little, reduces design and manufacture complexity, and can cover the feature of whole LTE frequency band.
Accompanying drawing explanation
Fig. 1 is metal frame LTE antenna structural representation of the present utility model;
Fig. 2 is circuit theory (the comprising match circuit) schematic diagram of the full range LTE antenna based on metal frame of the present utility model;
Fig. 3 is antenna S parameter analog result of the present utility model;
Fig. 4 is antenna global radiation Efficiency Simulation result of the present utility model;
Fig. 5 is various piece in the utility model antenna (band pass filter, additional inductor and the match circuit) impact on antenna S parameter;
Fig. 6 is the impact of the utility model band pass filter when different induction value on antenna S parameter.
Label declaration:
1, metal frame; 2, ground plate; 3, crack; 4, headroom district; 5, band pass filter; 6, USB interface; 7, antenna feed point; 8, additional inductor; 9, match circuit.
Embodiment
By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of the utility model most critical is: only utilize metal frame as radiating element of antenna, and adopts passive band pass filter to replace the active band switch of prior art, and not only structure is simple, takes up room little, and can effectively cover LTE Whole frequency band.
Please refer to Fig. 1, a kind of metal frame LTE antenna, comprise metal frame 1 and a ground plate 2, described ground plate 2 is arranged in described metal frame 1, is provided with a headroom district 4 in described metal frame 1, and the dual-side of described metal frame 1 is arranged with two and cracks 3; Be provided with a band pass filter 5 in described headroom district 4, described band pass filter 5 one end connects described metal frame 1, and the other end connects described ground plate 2; Also be provided with an additional inductor in described headroom district 4, described additional inductor 8 one end connects described metal frame 1, and the other end connects described ground plate 2.
From foregoing description, the beneficial effects of the utility model are: only utilize metal frame as radiating element of antenna, and adopt passive band pass filter to replace the active band switch of prior art, structure is simple, cost is low, take up room little, reduce Design and manufacture complexity, and whole LTE frequency band can be covered.
Further, a USB interface is also provided with in described headroom district.
Further, described band pass filter and described additional inductor lay respectively at the both sides of described USB interface.
Seen from the above description, extra additional inductor is utilized can effectively to regulate high band in the antenna performance at 1.7GHz place.
Further, described band pass filter comprises the inductance and an electric capacity that are connected in series.
Seen from the above description, band pass filter is easy to operate passive device, and structure is simple, takes up room little; Its objective is for effectively regulating high band in the antenna performance at 2.4GHz place.
Further, an antenna feed point is also provided with in described headroom district.
Further, described antenna feed point is connected to described metal frame by a match circuit.
Seen from the above description, match circuit is utilized can to improve the low-frequency range performance of antenna.
Further, crack described in and be positioned at described headroom district and described ground plate joint.
Further, the width cracked described in is 1.0-2.0mm.
Particularly, as shown in Figure 1, embodiment of the present utility model is: a kind of metal frame LTE antenna, and comprise metal frame 1 and a ground plate 2, wherein metal frame 1 is as unique antenna radiator, without the need to arranging extra antenna radiator in metal frame; Described ground plate 2 is arranged in described metal frame 1, and in described metal frame 1, one end is provided with a headroom district 4; Two sides of described metal frame 1 are arranged with two and crack 3, described two crack and are positioned at headroom district 4 and ground plate 2 joint, and described two width cracked are 1.0-2.0mm, preferred 1.2-1.5mm, the excessive impact of the width that cracks is attractive in appearance, too small, can cause electric current crossfire or short circuit; Band pass filter 5, one USB interface 6, antenna feed point 7, additional inductor 8 is provided with in described headroom district 4.Described USB interface 6 is usually located at the center in headroom district; Described antenna feed point 7 connects described metal frame 1, can be located at USB interface 6 side, and preferably, described antenna feed point 7 is connected to described metal frame by a match circuit, and match circuit is mainly used in control antenna low-frequency range performance; Described band pass filter 5 comprises the electric capacity and an inductance that are connected in series, is non-active device, and structure is simple, and take up room little, this band pass filter is for controlling the performance of high band at 2.4GHz place; Described band pass filter one end connects described metal frame 1, and the other end connects described ground plate 2, and band pass filter 5 and antenna feed point 7 lay respectively at the both sides of USB interface 6; Described additional inductor 8 is for controlling or regulating high band in the performance at 1.7GHz place, and one end of described additional inductor is connected with described metal frame 1, and the other end is connected with described ground plate 2, and additional inductor is positioned at the side of antenna feed point 7.
Fig. 2 is the circuit theory (comprising band pass filter 5, additional inductor 8 and match circuit 9) of the full range LTE antenna based on metal frame of the present utility model.The antenna S parameter of the utility model embodiment and the analog result of global radiation efficiency as shown in Figures 3 and 4 respectively; For the antenna for mobile phone of (height) size of 70 millimeters of (wide) × 140 millimeter (length) x5mm, can see that this antenna can cover whole LTE frequency band well, the S parameter of antenna and global radiation efficiency all can meet basic communication need at low-frequency range 0.7GHz, 0.96GHz, high band 1.71GHz, 2.7GHz.
In order to disclose antenna different piece and band pass filter, additional inductor and match circuit further to the impact of antenna performance, Fig. 5 gives the antenna S parameter curve of antenna S parameter in following four kinds of situations: do not have band pass filter and additional inductor, only have band pass filter, have band pass filter and additional inductor and resulting belt to have the match circuit of described three part of devices and low side to some extent.As can be seen from Figure 5, when itself having three resonance without any antenna during device, one is the 0.85GHz at LTE low side, and two is at high-end 1.6GHz and 2.6GH of LTE, but only has these three resonance can not meet requirement to antenna performance.It can also be seen that from Fig. 5, at introduction band pass filter, additional inductor and match circuit, the performance of antenna will effectively be improved.The effect of special band pass filter is the resonance being introduced in about 2.3GHz; Additional inductor can move to 1.9GHz the resonance at 1.6GHz place, thus strengthens the antenna performance of antenna in 1.7-2.2GHz frequency; The main contributions of match circuit is the antenna performance changing LTE low side, and described especially match circuit makes LTE low side originally only have single resonance frequency to become the situation with two resonance frequencys, thus effectively increases the bandwidth of LTE low side.
As previously mentioned, described band pass filter is composed in series by an electric capacity and an inductance, and the quality factor Q value of resonance frequency and filter is determined by the parameter value of inductance and electric capacity.Be illustrated in figure 6 the analog result of the antenna S parameter when different induction value, article three, curve respectively corresponding inductance be L=L0,0.7xL0 and 1.3xL0, wherein L0 simulates the inductance ideal value obtained, can see, different inductance parameters is extremely important in the effect of high band to antenna performance, can well cover whole high frequency band by regulating inductance value.In addition, as can be seen from Fig. 6 also, because the resonance frequency of band pass filter is in the frequency range of high frequency band, therefore, different induction parameter only has an impact at high band, but can ignore in the impact of low-frequency range.
In sum, the utility model only utilizes metal frame as unique radiant element of antenna, and adopts band pass filter to replace the band switch of prior art, and it is simple that the utility model has structure, and cost is low, takes up room little, reduces Design and manufacture complexity; Utilize an impedance circuit to improve LTE low-frequency range performance simultaneously, utilize additional capacitor to improve LTE high band performance further, make antenna can cover whole LTE frequency band.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. a metal frame LTE antenna, comprises a metal frame and a ground plate, and described ground plate is arranged in described metal frame, is provided with a headroom district, it is characterized in that in described metal frame: the dual-side of described metal frame is arranged with two and cracks; Be provided with a band pass filter in described headroom district, described band pass filter one end connects described metal frame, and the other end connects described ground plate.
2. metal frame LTE antenna according to claim 1, is characterized in that: be also provided with an additional inductor in described headroom district, and described additional inductor one end connects described metal frame, and the other end connects described ground plate.
3. metal frame LTE antenna according to claim 2, is characterized in that: be also provided with a USB interface in described headroom district.
4. metal frame LTE antenna according to claim 3, is characterized in that: described band pass filter and described additional inductor lay respectively at the both sides of described USB interface.
5. the metal frame LTE antenna according to any one of claim 1-4, is characterized in that: described band pass filter comprises the inductance and an electric capacity that are connected in series.
6. the metal frame LTE antenna according to any one of claim 1-4, is characterized in that: be also provided with an antenna feed point in described headroom district.
7. metal frame LTE antenna according to claim 6, is characterized in that: described antenna feed point is connected to described metal frame by a match circuit.
8. the metal frame LTE antenna according to any one of claim 1-4, is characterized in that: described two crack and are positioned at described headroom district and described ground plate joint.
9. the metal frame LTE antenna according to any one of claim 1-4, is characterized in that: described two width cracked are 1.0-2.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520616390.5U CN204966668U (en) | 2015-08-14 | 2015-08-14 | Metal frame LTE antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520616390.5U CN204966668U (en) | 2015-08-14 | 2015-08-14 | Metal frame LTE antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204966668U true CN204966668U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520616390.5U Expired - Fee Related CN204966668U (en) | 2015-08-14 | 2015-08-14 | Metal frame LTE antenna |
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| Country | Link |
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| CN (1) | CN204966668U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161865A (en) * | 2015-08-14 | 2015-12-16 | 深圳市信维通信股份有限公司 | LTE antenna with metal frame |
| CN105870599A (en) * | 2016-05-04 | 2016-08-17 | 深圳市信维通信股份有限公司 | All-metal three-section LTE frequency band mobile phone antenna |
| CN106374230A (en) * | 2016-09-30 | 2017-02-01 | 乐视控股（北京）有限公司 | Mobile terminal built-in antenna and mobile terminal |
-
2015
- 2015-08-14 CN CN201520616390.5U patent/CN204966668U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105161865A (en) * | 2015-08-14 | 2015-12-16 | 深圳市信维通信股份有限公司 | LTE antenna with metal frame |
| CN105161865B (en) * | 2015-08-14 | 2018-12-18 | 深圳市信维通信股份有限公司 | A kind of metal frame LTE antenna |
| CN105870599A (en) * | 2016-05-04 | 2016-08-17 | 深圳市信维通信股份有限公司 | All-metal three-section LTE frequency band mobile phone antenna |
| CN106374230A (en) * | 2016-09-30 | 2017-02-01 | 乐视控股（北京）有限公司 | Mobile terminal built-in antenna and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 |