CN203071230U - Positioning antenna and cellphone including same - Google Patents
Positioning antenna and cellphone including same Download PDFInfo
- Publication number
- CN203071230U CN203071230U CN 201320068339 CN201320068339U CN203071230U CN 203071230 U CN203071230 U CN 203071230U CN 201320068339 CN201320068339 CN 201320068339 CN 201320068339 U CN201320068339 U CN 201320068339U CN 203071230 U CN203071230 U CN 203071230U
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- China
- Prior art keywords
- antenna
- positioning antenna
- positioning
- mainboard
- mobile phone
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- Expired - Lifetime
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- Position Fixing By Use Of Radio Waves (AREA)
- Details Of Aerials (AREA)
Abstract
The utility model discloses a positioning antenna and a cellphone including the same. The positioning antenna comprises an insulation substrate, a feed point and a metal lead part electrically connected with the feed point, wherein the feed point and the metal lead part are both disposed on a surface of the insulation substrate; an antenna floor is disposed on the insulation substrate; and at least one inductor is connected in series on a wire routing path of the metal lead part. Since the antenna floor is disposed on the insulation substrate, the positioning antenna can use the antenna floor and thus dependence of the positioning antenna on a mainboard floor is reduced, and echo loss of the positioning antenna is substantially reduced.
Description
Technical field
The utility model relates to field of antenna, particularly a kind of positioning antenna and the mobile phone that comprises it.
Background technology
Along with the development of mobile communication technology, the function of mobile phone from strength to strength, for example, video playback, take pictures, video recording, e-book, Internet chat even satellite positioning functions.Global position system comprises GPS(Global Positioning System, global positioning system) system and GLONASS(Global Navigation Satellite System, GPS (Global Position System)) system.The message center frequency of gps system and GLONASS system is respectively 1575MHz and 1602MHz.For receiving satellite positioning signals, need to install positioning antenna in the mobile phone.
There are two shortcomings in existing positioning antenna: the first, return loss is higher, because positioning antenna is bigger to the dependence on mainboard ground in the cell phone mainboard, furthermore far away again apart from mainboard ground, thereby the return loss of positioning antenna is all higher usually; The second, passband is narrower, disturbs owing to be subjected to the signal of cell phone mainboard easily, and the passband of positioning antenna only has 20MHz, has greatly limited the transmission of signal.
The utility model content
The technical problems to be solved in the utility model is for the higher defective of the return loss that overcomes positioning antenna of the prior art, and the lower positioning antenna of a kind of return loss and the mobile phone that comprises it are provided.
The utility model solves above-mentioned technical problem by following technical proposals:
A kind of positioning antenna, it comprises an insulated substrate, feedback point and a plain conductor portion that is electrically connected with this feedback point, this feedback point and this plain conductor portion all are arranged on the surface of this insulated substrate, its characteristics are, also be provided with an antenna ground on this insulated substrate, at least one inductance of series connection on the wiring path of this plain conductor portion.
Preferable, this antenna ground is for printing Copper Foil.
Preferable, the material of this insulated substrate is polytetrafluoroethylene.
A kind of mobile phone comprises a mobile phone mainboard, and this cell phone mainboard is provided with a baseband chip and an antenna-matching circuit, and its characteristics are, aforesaid positioning antenna also is set in this mobile phone.
Preferable, this mobile phone also comprises a coaxial cable, is electrically connected the mainboard of the outer metal level of this antenna ground by this coaxial cable and this cell phone mainboard, and the inner metal layer that this antenna-matching circuit passes through this coaxial cable is electrically connected with this feedback point.By using coaxial cable, positioning antenna is far away apart from the distance of cell phone mainboard, thereby is not easy to be subjected to the signal interference of cell phone mainboard, passband broadening.
Positive progressive effect of the present utility model is:
By at this insulated substrate antenna ground being set, positioning antenna can use antenna ground, the dependence on mainboard ground is diminished, thereby the return loss of positioning antenna reduces greatly.
Description of drawings
Fig. 1 is the structural representation of the positioning antenna of the utility model preferred embodiment.
Fig. 2 is the use principle figure of the positioning antenna of the utility model preferred embodiment.
Fig. 3 is the voltage standing wave ratio resolution chart of the positioning antenna of the utility model preferred embodiment.
Fig. 4 is the return loss resolution chart of the positioning antenna of the utility model preferred embodiment.
Fig. 5 is the antenna axial ratio resolution chart of the positioning antenna of the utility model preferred embodiment.
Fig. 6 is the antenna gain resolution chart of the positioning antenna of the utility model preferred embodiment.
Description of reference numerals:
Insulated substrate: 1 feedback point: 2
Plain conductor portion: 3 inductance: 4
Antenna ground: 5 coaxial cables: 6
Cell phone mainboard: 7 mainboard ground: 8
Outer metal level: 61 inner metal layers: 62
Embodiment
Provide the utility model preferred embodiment below in conjunction with accompanying drawing, to describe the technical solution of the utility model in detail.
The structure of the positioning antenna of present embodiment is as follows:
As shown in Figure 1, the positioning antenna of present embodiment comprises that a material is insulated substrate 1, feedback point 2 and one plain conductor portion 3 that is electrically connected with this feedback point 2 of polytetrafluoroethylene, this feedback point 2 and this plain conductor portion 3 all are arranged on the surface of this insulated substrate 1, this plain conductor portion 3 adopts tortuous cabling mode, and at least one inductance 4 of series connection on the wiring path of this plain conductor portion 3, also be provided with an antenna ground 5 on this insulated substrate 1, this antenna ground 5 is for printing Copper Foil.
As shown in Figure 2, present embodiment also provides a kind of mobile phone, and it comprises a mobile phone mainboard 7, a coaxial cable 6 and aforesaid positioning antenna, and this cell phone mainboard 7 is provided with a baseband chip (not drawing) and an antenna-matching circuit (not drawing).This antenna ground 5 is electrically connected with the mainboard ground 8 of this cell phone mainboard 7 by the outer metal level 61 of this coaxial cable 6, and this antenna-matching circuit is electrically connected with this feedback point 2 by the inner metal layer 62 of this coaxial cable 6.
The operation principle of the positioning antenna of present embodiment is as follows:
Please understand in conjunction with Fig. 2, this plain conductor portion 3 receives the electromagnetic wave signal of satellite radiation in the free space, and under the excitation of electromagnetic wave signal, produce higher-order of oscillation electric current, then by this feedback point 2 and this inner metal layer 62 with the antenna-matching circuit of higher-order of oscillation current delivery to this cell phone mainboard 7, antenna-matching circuit is used for impedance matching, make the electromagnetic wave energy of storing in the antenna be delivered to this baseband chip efficiently, finally finish positioning function.
The positioning antenna of present embodiment has following technique effect:
The first, return loss reduces, and by at this insulated substrate antenna ground being set, positioning antenna can use antenna ground, and the dependence on mainboard ground is diminished.
The second, passband broadening, by using coaxial cable, positioning antenna is far away apart from the distance of cell phone mainboard, thereby is not easy to be subjected to the signal interference of cell phone mainboard, passband broadening.
Three, tunable, the positioning antenna of present embodiment is in series with inductance, by changing inductance value, can realize the coupling of positioning antenna and cell phone mainboard.In addition, according to the size of handset shell, can change the length of coaxial cable, in order to positioning antenna is installed to the diverse location of terminal.
The experimental result of the positioning antenna of present embodiment:
Please understand in conjunction with Fig. 3-4, the positioning antenna resonance centre frequency of present embodiment is 1602Mhz, and passband is 450Mhz, and return loss is-30dB that the voltage standing wave(VSW) coefficient is 1.06.
According to the return loss formula, RL=-10log (P
Go intoP
Instead), P as can be known
Go intoP
Instead=1000, namely be emitted to the electromagnetic wave signal of this positioning antenna by satellite, only 1 ‰ energy return loss is fallen, and the electromagnetic wave signals of the overwhelming majority are all received by antenna, so return loss is extremely low.
In addition, from the angle analysis of voltage standing wave(VSW) coefficient, SWR=Rr=(1+K) (1-K)=1.06, wherein R and r represent input impedance and output impedance respectively, and K represents reflection coefficient, therefore, the input impedance of this positioning antenna and output impedance are equal substantially, i.e. impedance matching is higher, and reflection coefficient is less.
Please continue to understand in conjunction with Fig. 3-4, the three dB bandwidth of this positioning antenna (being the scope between m1 and the m2) has contained the receive frequency (m4) of gps system and the receive frequency (m3) of GLONASS system, thereby can receive the framing signal of two satellite systems preferably.
Please understand in conjunction with Fig. 4-5, arbitrary frequency point m5 (frequency is 1.57273GHz) between receive frequency (m4) by choosing the gps system among Fig. 4 and the receive frequency (m3) of GLONASS system, carry out the antenna axial ratio test, be 0.26dB by testing the axial ratio that m5 as can be known orders, namely minimum to the dependence of direction.
Please understand in conjunction with Fig. 4 and Fig. 6, arbitrary frequency point m6 (frequency is 1.591GHz) between receive frequency (m4) by choosing the gps system among Fig. 4 and the receive frequency (m3) of GLONASS system, carry out the antenna gain test, be 4.52dB by testing the antenna gain that m6 as can be known orders, thereby this positioning antenna can be concentrated input power and radiate preferably.
Though more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection range of the present utility model is limited by appended claims.Those skilled in the art can make numerous variations or modification to these execution modes under the prerequisite that does not deviate from principle of the present utility model and essence, but these changes and modification all fall into protection range of the present utility model.
Claims (5)
1. positioning antenna, it comprises an insulated substrate, feedback point and a plain conductor portion that is electrically connected with this feedback point, this feedback point and this plain conductor portion all are arranged on the surface of this insulated substrate, it is characterized in that, also be provided with an antenna ground on this insulated substrate, at least one inductance of series connection on the wiring path of this plain conductor portion.
2. positioning antenna as claimed in claim 1 is characterized in that, this antenna ground is for printing Copper Foil.
3. as any described positioning antenna among the claim 1-2, it is characterized in that the material of this insulated substrate is polytetrafluoroethylene.
4. a mobile phone comprises a mobile phone mainboard, and this cell phone mainboard is provided with a baseband chip and an antenna-matching circuit, it is characterized in that, also is provided with any described positioning antenna among the claim 1-3 in this mobile phone.
5. mobile phone as claimed in claim 4, it is characterized in that, this mobile phone also comprises a coaxial cable, is electrically connected the mainboard of the outer metal level of this antenna ground by this coaxial cable and this cell phone mainboard, and the inner metal layer that this antenna-matching circuit passes through this coaxial cable is electrically connected with this feedback point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320068339 CN203071230U (en) | 2013-02-05 | 2013-02-05 | Positioning antenna and cellphone including same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320068339 CN203071230U (en) | 2013-02-05 | 2013-02-05 | Positioning antenna and cellphone including same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203071230U true CN203071230U (en) | 2013-07-17 |
Family
ID=48769984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320068339 Expired - Lifetime CN203071230U (en) | 2013-02-05 | 2013-02-05 | Positioning antenna and cellphone including same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203071230U (en) |
-
2013
- 2013-02-05 CN CN 201320068339 patent/CN203071230U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171012 Address after: 200335 Shanghai city Changning District Admiralty Road No. 633 building A Room 201 Patentee after: SIMCOM WIRELESS SOLUTIONS Ltd. Address before: 200335 Shanghai city Changning District Admiralty Road No. 633 Patentee before: Shanghai SIMCom Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130717 |