CN202817173U - Multiple resonance broadband coil antenna system - Google Patents
Multiple resonance broadband coil antenna system Download PDFInfo
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- CN202817173U CN202817173U CN 201220020608 CN201220020608U CN202817173U CN 202817173 U CN202817173 U CN 202817173U CN 201220020608 CN201220020608 CN 201220020608 CN 201220020608 U CN201220020608 U CN 201220020608U CN 202817173 U CN202817173 U CN 202817173U
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Abstract
The utility model discloses a multiple resonance broadband loop antenna system, comprising a PCB (Printed circuit board) and an antenna. The antenna comprises a loop branch, a first open circuit branch, a second open circuit branch, a feed line and a ground line, wherein the loop branch comprises a first end and a second end, and the first end is respectively in connection with the feed line and the first open circuit branch; the second end is respectively in connection with the ground line and the second open circuit branch; the first open circuit branch and the second open circuit branch are of mirror symmetry. According to the utility model, a multiple resonance broadband coil antenna of high frequency three resonance can be realized through adjusting a self resonance mode of a coil antenna, which can meets requirements of simultaneous working of a LTE (E-UTRA Band) high frequency band and routine GSM 850/900, DCS,PCS and UMTS and has high first hand efficiency.
Description
Technical field
The utility model relates to a kind of multi resonant wide band loop antenna system of shaking.
Background technology
Along with the development of mobile communication, LTE(Long Term Evaluation) being subject to people more and more pays close attention to.LTE frequency range commonly used: LTE(E-UTRA Band 13/17/20), frequency range 0.7GHz-0.862GHz.LTE (E-UTRA Band 40), frequency range 2.3GHz-2.4GHz.LTE (E-UTRA Band 7), frequency range 2.5GHz-2.7GHz.Usually mobile terminal device also comprises GSM850/900, DCS, PCS, UMTS, its frequency range 0.824GHz-0.96GHz, 1.71GHz-2.17GHz.But conventional mobile terminal device will be realized so wide low-and high-frequency bandwidth difficult on the basis that does not change original size.Because the low frequency of mobile terminal device depends on mobile terminal device floor PCB(Printed Circuit Board basically) size, can't realize that almost the low frequency full frequency band covers 0.7GHz-0.96GHz not changing floor PCB size.High frequency 1.71GHz-2.7GHz then has the space of lifting.
Be exactly to reach a hand radiation efficiency of high as far as possible antenna to one of built-in aerial important technical requirement.The radiation efficiency of antenna is one of most important index of weighing by antenna.Radiation efficiency will be measured in three kinds of situations: 1. free space, 2.Near the number of people, 3.Hold near the number of people.Above-mentioned hand radiation efficiency just refers to hold mobile phone near the efficient in the situation of the number of people.Namely to improve a hand radiation efficiency of antenna, when improving antenna free space efficient, reduce as far as possible the loss that head and hand strap are come, namely finally improve a hand radiation efficiency of antenna.
Loop antenna is recognized the antenna form that a good hand efficient performance is arranged altogether.Prior art such as Fig. 1 by introducing electric capacity, form extra one pole mode of resonance and reach 3 resonance bands of high frequency.
The utility model content
The purpose of this utility model is to disclose a kind of multi resonant wide band loop antenna system of shaking, the multi resonant that mode of resonance by adjustable ring antenna self reaches 3 resonance of the high frequency wide band loop antenna that shakes, can satisfy LTE high band and conventional GSM850/900, DCS, PCS, simultaneously job requirement of UMTS, and good hand efficient is arranged.
The technical solution of the utility model is as follows:
A kind of multi resonant wide band loop antenna system of shaking, comprise pcb board and antenna, described antenna comprises loop branch, the first open circuit branch, the second open circuit branch, feeder line and earth connection, and described loop branch comprises first terminal and the second end, and described the first end connects respectively feeder line and first branch that opens a way; Described the second end connects respectively earth connection and the second open circuit branch.
Preferably, described the first open circuit branch and the second open circuit branch mirror image are symmetrical.
Preferably, described feeder line and described earth connection mirror image are symmetrical; Described feeder line extends to loop antenna the first end after through twice 90-degree bending and is connected with it; Described earth connection extends to loop antenna the second end after through twice 90-degree bending and is connected with it.
Preferably, described the first open circuit branch and the second open circuit branch all arrange to loop branch is close.
Preferably, described the first open circuit branch and the second open circuit branch all arrange to pcb board is close.
Preferably, described the first open circuit branch and the second open circuit branch into the bending wire.
Compared with prior art, the multi resonant that the mode of resonance of the utility model by adjustable ring antenna self reaches 3 resonance of the high frequency wide band loop antenna that shakes can satisfy LTE high band and conventional GSM850/900, DCS, PCS, simultaneously job requirement of UMTS, and good hand efficient is arranged.
Description of drawings
The schematic diagram of Fig. 1 prior art antenna;
The shake schematic diagram of wide band loop antenna system of a kind of multi resonant of Fig. 2 the utility model;
The shake structural representation of wide band loop antenna system of a kind of multi resonant of Fig. 3 the utility model specific embodiment;
Fig. 4 the utility model specific embodiment f2 current distributing figure;
Fig. 5 the utility model specific embodiment f3 current distributing figure;
Fig. 6 the utility model specific embodiment return loss plot;
Fig. 7 the utility model changes example 1 figure;
Fig. 8 the utility model changes example 2 figure.
Embodiment
The below is further described the utility model with specific embodiment by reference to the accompanying drawings.
Embodiment
Referring to Fig. 2, a kind of multi resonant wide band loop antenna system of shaking, comprise pcb board 100 and antenna 200, antenna 200 comprises loop branch 202, the first open circuit branch 201, the second open circuit branch 203, feeder line 101 and earth connection 102, described loop branch comprises first terminal and the second end, and described the first end connects respectively feeder line 101 and first branch 201 that opens a way; Described the second end connects respectively earth connection 102 and the second open circuit branch 203.Feeder line 101 links to each other with a signal source.Wherein, the width of pcb board 100 is W.Feeder line 101 and earth connection 102 spacings are the W of 1/3W ~ (1-0.618).The overall length L1 of loop branch; The first open circuit branch 201 and the second open circuit branch 203 mirror images are symmetrical, respectively long L2.
Referring to Fig. 3, in the present embodiment, the long 102mm of pcb board, wide 60mm, empty regions 8mm, feeder line 101 and distributing point A, earth connection 102 and earth point B, distributing point A and earth point B are apart from 20mm.Antenna holder 104.
The loop antenna fundamental mode is mainly determined by loop branch 202 total length L 1.
According to the utility model, the first resonance point is the same with general loop antenna, resonance length (1/4) * L1, and frequency f 0, respective frequencies design between 0.82GHz ~ 0.96GHz, and the antenna resonance pattern is common mode.
According to the utility model, the second resonance point is the same with general loop antenna, resonance length (1/2) * L1, and frequency f 1, respective frequencies design between 1.7GHz ~ 1.8GHz, and the antenna resonance pattern is differential mode.
According to the utility model, the 3rd resonance point is different with general loop antenna.General loop antenna resonance length is (3/2) * L1, and the antenna resonance pattern is common mode, and respective frequencies designs between 1.9GHz ~ 2.2GHz.In the utility model, because the introducing of the first open circuit branch 201 and the second open circuit branch 203 makes the frequency of the 3rd resonance point move to higher frequency.The 4th resonance point is moved to the frequency that hangs down some.Here, the 3rd resonance point refers to that resonance length is the resonance point of (3/2) * L1, and the 4th resonance point refers to that the resonance electrical length is the resonance point of 2 * L1.The resonance point that common resonance length is 2 * L1 can not appear at below the 3GHz, unless other antenna cover is arranged, metal shell, coupling waits the 4th resonance point is occurred below 3GHz.
According to the utility model, the 4th resonance point resonance frequency is lower than the 3rd resonance point.So the resonance length of the 4th resonance point resonance frequency reality should be (L1+2*L2) * 2, frequency is f2, and the antenna resonance pattern is differential mode, current distributing figure such as Fig. 4.The resonance length of the 3rd resonance point resonance frequency reality should be (L1-2*L2) * 3/2, and frequency is f3, and the antenna resonance pattern is common mode, current distributing figure such as Fig. 5.
According to the utility model, for low-frequency resonant f0, the VSWR3:1 bandwidth can cover GSM850 and GSM900, for (1/2) * L1 differential mode of high frequency, (L1+2*L2) * 2 differential modes, (L1-2*L2) * 3/2 common mode, the resonance frequency f1 that produces, f2, and the VSWR3:1 bandwidth of f3 can cover DCS, PCS, UMTS, LTE (E-UTRA Band 40), LTE (E-UTRA Band 7), as shown in Figure 6.Wherein FS is the return loss of free space, and BH is the return loss of head model, and BHH is head and the return loss of hand model.
In the present embodiment, the first open circuit branch 201 and the second open circuit branch 203 all are parallel to the pcb board broadside, and only for giving an example, during implementation, the two can have a lot of distortion.As shown in Figure 7, the first open circuit branch 201 and the second open circuit branch 203 all to loop branch 202 near arranging, and the first open circuit branch and the second open circuit branch into the bending wire.Perhaps as shown in Figure 8, the first open circuit branch 201 and the second open circuit branch 203 all to pcb board near arranging, and the first open circuit branch 201 and the second open circuit branch 203 are the bending wire.
The utility model preferred embodiment just is used for helping to set forth the utility model.Preferred embodiment does not have all details of detailed descriptionthe, does not limit this utility model yet and only is described embodiment.Obviously, according to the content of this specification, can make many modifications and variations.These embodiment are chosen and specifically described to this specification, is in order to explain better principle of the present utility model and practical application, thereby the technical field technical staff can utilize the utility model well under making.The utility model only is subjected to the restriction of claims and four corner and equivalent.
Claims (6)
1. multi resonant wide band loop antenna system of shaking, comprise pcb board and antenna, it is characterized in that: described antenna comprises loop branch, the first open circuit branch, the second open circuit branch, feeder line and earth connection, described loop branch comprises first terminal and the second end, and described the first end connects respectively feeder line and first branch that opens a way; Described the second end connects respectively earth connection and the second open circuit branch.
2. antenna system according to claim 1 is characterized in that, described the first open circuit branch and the second open circuit branch mirror image are symmetrical.
3. antenna system according to claim 1 is characterized in that, described feeder line and described earth connection mirror image are symmetrical; Described feeder line extends to loop antenna the first end after through twice 90-degree bending and is connected with it; Described earth connection extends to loop antenna the second end after through twice 90-degree bending and is connected with it.
4. antenna system according to claim 2 is characterized in that, described the first open circuit branch and the second open circuit branch all arrange to loop branch is close.
5. antenna system according to claim 2 is characterized in that, described the first open circuit branch and the second open circuit branch all arrange to pcb board is close.
6. according to claim 4 or 5 described antenna systems, it is characterized in that described the first open circuit branch and the second open circuit branch into the bending wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220020608 CN202817173U (en) | 2012-01-17 | 2012-01-17 | Multiple resonance broadband coil antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220020608 CN202817173U (en) | 2012-01-17 | 2012-01-17 | Multiple resonance broadband coil antenna system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202817173U true CN202817173U (en) | 2013-03-20 |
Family
ID=47875997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220020608 Expired - Fee Related CN202817173U (en) | 2012-01-17 | 2012-01-17 | Multiple resonance broadband coil antenna system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202817173U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346383A (en) * | 2013-06-28 | 2013-10-09 | 华为终端有限公司 | Annular antenna module and electronic device with annular antenna module |
| TWI679808B (en) * | 2018-09-10 | 2019-12-11 | 和碩聯合科技股份有限公司 | Dual-feed loop antenna structure and electronic device |
| CN112448140A (en) * | 2019-08-30 | 2021-03-05 | 北京小米移动软件有限公司 | Antenna module and terminal |
-
2012
- 2012-01-17 CN CN 201220020608 patent/CN202817173U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346383A (en) * | 2013-06-28 | 2013-10-09 | 华为终端有限公司 | Annular antenna module and electronic device with annular antenna module |
| TWI679808B (en) * | 2018-09-10 | 2019-12-11 | 和碩聯合科技股份有限公司 | Dual-feed loop antenna structure and electronic device |
| US10938100B2 (en) | 2018-09-10 | 2021-03-02 | Pegatron Corporation | Dual-feed loop antenna structure and electronic device |
| CN112448140A (en) * | 2019-08-30 | 2021-03-05 | 北京小米移动软件有限公司 | Antenna module and terminal |
| CN112448140B (en) * | 2019-08-30 | 2022-03-01 | 北京小米移动软件有限公司 | Antenna module and 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 |
Granted publication date: 20130320 Termination date: 20190117 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |