CN203135865U - Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) - Google Patents
Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) Download PDFInfo
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- CN203135865U CN203135865U CN2013201265566U CN201320126556U CN203135865U CN 203135865 U CN203135865 U CN 203135865U CN 2013201265566 U CN2013201265566 U CN 2013201265566U CN 201320126556 U CN201320126556 U CN 201320126556U CN 203135865 U CN203135865 U CN 203135865U
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Abstract
The utility model discloses a mobile terminal for alleviating interference of LTE emission in a GPS. The mobile terminal comprises a radio frequency module, an LTE emission link, and a GPS receiving link. The LTE emission link comprises an emission filter, a power amplifier, a duplexer, a transceiver antenna and a first trap filter. The GPS receiving link comprises a GPS filter, a GPS antenna and a second trap filter. By additionally arranging the first trap filter on the LTE emission link to filter second harmonics generated by non-linear devices on the LTE emission link and further arranging the second trap filter on the GPS receiving link to filter LTE-B13 main wave signals entering the GPS receiving link, the mobile terminal thus alleviates the influence of a working LTE-B13 frequency range on the working GPS to the maximum when the LTE-B13 frequency range and the GPS are working at the same time. The carrier-to-noise ratio of the mobile terminal is thus increased. The positioning precision of the mobile terminal is further enhanced.
Description
Technical field
The utility model relates to the Anti-Jamming Technique of portable terminal, and is particularly a kind of for reducing the portable terminal of LTE emission to the interference of GPS.
Background technology
As shown in Figure 1, the existing LTE_B13[LTE(Long Term Evolution that supports, Long Term Evolution) band13 frequency range] mobile phone of frequency range need realize GPS(global Position System, global positioning system) during function, needs to receive on the link at LTE transmitting chain and GPS independently antenna is set respectively.At this moment, to main collection antenna 106 emissions, the information via GPS filter 107 that gps antenna 108 receives enters radio frequency chip 101 to LTE_B13 master's ripple signal of radio frequency chip 101 emissions through emission filter 102, power amplifier 103, duplexer 104, radio-frequency (RF) switch 105.
Wherein, the frequency of LTE_B13 transmitting terminal master ripple signal is 777-787MHz, the centre frequency that GPS receives signal is 1572.82MHz, when LTE_B13 frequency range and GPS work simultaneously, the interference source of GPS is from 2 points: a bit be on the LTE transmitting chain by the signal of the LTE_B13 frequency range of radio frequency chip 101 outputs through power amplifier, can produce second harmonic during nonlinear devices such as radio-frequency (RF) switch, because commercial at present duplexer hangs down filtering second harmonic fully at the isolation of GPS frequency range, this signal is coupled into GPS by gps antenna and receives the interference that directly causes GPS in the link; On the other hand the main ripple signal on the LTE transmitting chain also can be coupled to GPS by antenna and receive link, because the nonlinear device that GPS receives on the link also can produce second harmonic, its frequency is 1572.82MHz, just in time can drop in the GPS range of receiving, disturbs GPS to receive.The second harmonic that above-mentioned two kinds of situations produce can cause GPS to locate or can't correctly locate.
In view of this, the utility model provides a kind of for reducing the portable terminal of LTE emission to the interference of GPS.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, it is a kind of for reducing the portable terminal of LTE emission to the interference of GPS that the purpose of this utility model is to provide, with the second harmonic on the filtering LTE transmitting chain, and LTE_B13 master's ripple signal receives the second harmonic that link produces at GPS, the interference that reduction is located GPS.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of for reducing the portable terminal of LTE emission to the interference of GPS, it comprises: radio-frequency module, LTE transmitting chain and GPS receive link, wherein, described LTE transmitting chain comprises emission filter, power amplifier, duplexer and main collection antenna, described radio-frequency module, emission filter, power amplifier is connected successively with duplexer, described GPS receives link and comprises GPS filter and gps antenna, described GPS filter connects radio-frequency module, described LTE transmitting chain also comprises first trapper of the second harmonic that produces for the nonlinear device on the filtering LTE transmitting chain, and described first trapper connects duplexer and main collection antenna; Described GPS receives link and also comprises second trapper that receives the LTE_B13 master's ripple signal on the link for filtering GPS, and second trapper connects gps antenna and GPS filter.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, between described first trapper and main collection antenna, be in series with radio-frequency (RF) switch.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described first trapper comprises: first inductance, second inductance, the 3rd inductance and first electric capacity; One end of described first inductance connects duplexer, and the other end of first inductance connects the 3rd inductance by second inductance a end is with radio-frequency (RF) switch, also be connected an end and the radio-frequency (RF) switch of the 3rd inductance, the other end ground connection of described the 3rd inductance by first electric capacity.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described second trapper comprises second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 4th inductance; One end of described second electric capacity connects the GPS filter, and the other end of second electric capacity is by the 3rd electric capacity connection gps antenna, also successively by the 4th electric capacity, the 4th inductance ground connection.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described first trapper comprises: the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and the 5th inductance; One end of described the 5th electric capacity connects described duplexer, the other end of the 5th electric capacity by the 6th electric capacity connect described radio-frequency (RF) switch, also successively by the 7th electric capacity, the 5th inductance ground connection.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described second trapper comprises the 6th inductance, the 7th inductance, the 8th inductance and the 8th electric capacity; One end of described the 6th inductance connects the GPS filter, and the other end of the 6th inductance connects the 8th inductance by the 7th inductance a end is with gps antenna, also be connected an end and the gps antenna of the 8th inductance, the other end ground connection of described the 8th inductance by the 8th electric capacity.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described radio-frequency (RF) switch is that hilted broadsword is thrown analog switch more.
Described for reducing in the portable terminal of LTE emission to the interference of GPS, described portable terminal is mobile phone or panel computer.
Compared to prior art, the utility model provide for reducing the LTE emission portable terminal to the interference of GPS, by increase the second harmonic that first trapper comes the nonlinear device on the filtering LTE transmitting chain to produce at the LTE transmitting chain, and receiving link increase by second trapper at GPS comes filtering to enter LTE_B13 master's ripple signal that GPS receives link, reduced portable terminal to greatest extent when LTE_B13 frequency range and GPS work simultaneously, the work of LTE_B13 frequency range improves the carrier-to-noise ratio of portable terminal to the influence of GPS work.
Description of drawings
Fig. 1 is the circuit theory diagrams of existing portable terminal.
Fig. 2 is that the utility model is for reducing the circuit theory diagrams of LTE emission to first preferred embodiment of the portable terminal of the interference of GPS.
Fig. 3 is that the utility model is for reducing the circuit theory diagrams of LTE emission to second preferred embodiment of the portable terminal of the interference of GPS.
Fig. 4 is that the utility model is for reducing the circuit theory diagrams of LTE emission to the 3rd preferred embodiment of the portable terminal of the interference of GPS.
Embodiment
It is a kind of for reducing the LTE emission portable terminal to the interference of GPS that the utility model provides, clearer, clear and definite for making the purpose of this utility model, technical scheme and effect, below further describes with reference to the accompanying drawing the utility model of embodiment that develops simultaneously.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also Fig. 2, Fig. 2 is that the utility model is for reducing the circuit theory diagrams of LTE emission to first preferred embodiment of the portable terminal of the interference of GPS.
What as shown in Figure 2, the utility model provided comprises for reducing the portable terminal of LTE emission to the interference of GPS: radio-frequency module 110, LTE transmitting chain and GPS receive link.Wherein, described LTE transmitting chain comprises emission filter 120, power amplifier 130, duplexer 140 and main collection antenna 160, and described radio-frequency module 110, emission filter 120, power amplifier 130 and duplexer 140 are connected successively.Described GPS receives link and comprises GPS filter 170 and gps antenna 180, and described GPS filter 170 connects radio-frequency module 110.
When working simultaneously in order to reduce LTE_B13 frequency range and GPS, the second harmonic that the LTE_B13 frequency range produces is to the influence of GPS function, the utility model embodiment has increased by first trapper 190 at the LTE transmitting chain, and has increased by second trapper 200 at GPS reception link.Described first trapper 190 connects duplexer 140 and main collection antenna 160, is used for the second harmonic that the nonlinear device (as: power amplifier 130) on the filtering LTE transmitting chain produces; Second trapper 200 is used for filtering GPS and receives LTE_B13 master's ripple signal that link receives, and the nonlinear device of avoiding GPS to receive on the link produces second harmonic again.
See also Fig. 3, it is that the utility model is for reducing the circuit theory diagrams of LTE emission to second preferred embodiment of the portable terminal of the interference of GPS.Compare with first preferred embodiment, the difference of this second preferred embodiment only is to be in series with radio-frequency (RF) switch 150 between described first trapper 190 and main collection antenna 160, realization is selected the frequency range of LTE, thereby can be used for the second harmonic of other LTE frequency range of filtering on LTE transmitting chain and GPS reception link.
Among the utility model embodiment, described portable terminal comprises portable electronic commnication devices such as mobile phone, panel computer, be provided with D/A conversion unit 111 and GPS low noise amplifying unit 112 at radio-frequency module 110, D/A conversion unit 111 connects emission filter 120, and GPS low noise amplifying unit 112 connects GPS filter 170.
Wherein, emission filter 120, power amplifier 130, duplexer 140, radio-frequency (RF) switch 150, first trapper 190 and main collection antenna 160 have constituted the LTE transmitting chain of portable terminal, and the signal that radio-frequency module 110 is launched carries out launching through emission filter 120, power amplifier 130, duplexer 140, first trapper 190 and radio-frequency (RF) switch 150 to main collection antenna 160 successively after the digital-to-analogue conversion through D/A conversion unit 111.In the present embodiment, the centre frequency of first trapper 190 is 1572.82MHz, the second harmonic that can filtering power amplifier 130 nonlinear devices such as grade produces.
Described GPS filter 170, second trapper 200 and gps antenna 180 constitute GPS and receive link, the signal that gps antenna 180 receives through second trapper 200 and 170 filtering of GPS filter after, send to the GPS low noise amplifying unit 112 in the radio-frequency module 110.The centre frequency of described second trapper 200 is 786.41MHz, can filtering be coupled into GPS from the LTE transmitting chain and receive LTE_B13 master's ripple signal the link, when LTE_B13 frequency range and GPS are worked simultaneously, when having reduced the work of LTE_B13 frequency range to greatest extent, to the influence of GPS work.
In specific implementation process, described first trapper 190 comprises: first inductance L 1, second inductance L 2, the 3rd inductance L 3 and first capacitor C 1; One end of described first inductance L 1 connects duplexer 140, the other end that the other end of first inductance L 1 connects an end of the 3rd inductance L 3 and radio-frequency (RF) switch 150, this first inductance L 1 by second inductance L 2 also is connected an end and the radio-frequency (RF) switch 150 of the 3rd inductance L 3, the other end ground connection of described the 3rd inductance L 3 by first capacitor C 1.In the present embodiment, described first inductance L 1, second inductance L 2, the 3rd inductance L 3 and first capacitor C 1 constitute a resonator, and its centre frequency is 1572.82MHz, the second harmonic that can decay power amplifier 130 nonlinear devices such as grade produces.
Described second trapper 200 comprises second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 4th inductance L 4; The other end that one end of described second capacitor C 2 connects GPS filter 170, the second capacitor C 2 connects the other end of gps antenna 180, second capacitor C 2 also successively by the 4th capacitor C 4, the 4th inductance L 4 ground connection by the 3rd capacitor C 3.Described second capacitor C 2, the 3rd capacitor C 3, the 4th capacitor C 4 and the 4th inductance L 4 also constitute a resonator, and its centre frequency is 786.41MHz, can filtering be coupled into GPS from the LTE transmitting chain and receive LTE_B13 master's ripple signal the link.
See also Fig. 4, it is that the utility model is for reducing the circuit theory diagrams of LTE emission to the 3rd preferred embodiment of the portable terminal of the interference of GPS.This 3rd preferred embodiment has only changed the circuit structure of first trapper 190 and second trapper 200.As shown in Figure 4, described first trapper comprises: the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7 and the 5th inductance L 5; One end of described the 5th capacitor C 5 connects the other end of described duplexer 140, the five capacitor C 5 by the described radio-frequency (RF) switch 150 of the 6th capacitor C 6 connections, also successively by the 7th capacitor C 7, the 5th inductance L 5 ground connection.
Described second trapper 200 comprises the 6th inductance L 6, the 7th inductance L 7, the 8th inductance L 8 and the 8th capacitor C 8; One end of described the 6th inductance L 6 connects GPS filter 170, the end that the other end of the 6th inductance L 6 connects the 8th inductance L 8 by the 7th inductance L 7 is with gps antenna 180, also be connected an end and the gps antenna 180 of the 8th inductance L 8, the other end ground connection of described the 8th inductance C8 by the 8th capacitor C 8.
Should be noted that first trapper 190 and second trapper 200 in other embodiments can also adopt other electron component to constitute the resonator of corresponding frequencies, if can filtering LTE transmitting chain and GPS receive second harmonic on the link.
Further, described radio-frequency (RF) switch 150 is thrown analog switch for hilted broadsword more, for example hilted broadsword four is thrown analog switch SW1, throw analog switch SW1 by this hilted broadsword four and select different frequency ranges, when this hilted broadsword four is thrown analog switch SW1 and selected other frequency range, in that also can being set on the transmitting chain of this frequency range, corresponding trapper comes second harmonic on this transmitting chain of filtering.
In sum, the utility model is by increasing the second harmonic that first trapper comes the nonlinear device on the filtering LTE transmitting chain to produce at the LTE transmitting chain, and receiving link increase by second trapper at GPS comes filtering to enter LTE_B13 master's ripple signal that GPS receives link, reduced portable terminal to greatest extent when LTE_B13 frequency range and GPS work simultaneously, the work of LTE_B13 frequency range is to the influence of GPS work, improve the carrier-to-noise ratio of portable terminal, improved the positioning accuracy of portable terminal.
Be understandable that; for those of ordinary skills; can be equal to replacement or change according to the technical solution of the utility model and utility model design thereof, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (8)
1. one kind for reducing the LTE emission portable terminal to the interference of GPS, it comprises: radio-frequency module, LTE transmitting chain and GPS receive link, wherein, described LTE transmitting chain comprises emission filter, power amplifier, duplexer and main collection antenna, described radio-frequency module, emission filter, power amplifier is connected successively with duplexer, described GPS receives link and comprises GPS filter and gps antenna, described GPS filter connects radio-frequency module, it is characterized in that, described LTE transmitting chain also comprises first trapper of the second harmonic that produces for the nonlinear device on the filtering LTE transmitting chain, and described first trapper connects duplexer and main collection antenna; Described GPS receives link and also comprises second trapper that receives the LTE_B13 master's ripple signal on the link for filtering GPS, and second trapper connects gps antenna and GPS filter.
2. according to claim 1ly it is characterized in that for reducing the LTE emission portable terminal to the interference of GPS, between described first trapper and main collection antenna, be in series with radio-frequency (RF) switch.
3. according to claim 2 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described first trapper comprises: first inductance, second inductance, the 3rd inductance and first electric capacity; One end of described first inductance connects duplexer, and the other end of first inductance connects the 3rd inductance by second inductance a end is with radio-frequency (RF) switch, also be connected an end and the radio-frequency (RF) switch of the 3rd inductance, the other end ground connection of described the 3rd inductance by first electric capacity.
4. according to claim 1 and 2 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described second trapper comprises second electric capacity, the 3rd electric capacity, the 4th electric capacity and the 4th inductance; One end of described second electric capacity connects the GPS filter, and the other end of second electric capacity is by the 3rd electric capacity connection gps antenna, also successively by the 4th electric capacity, the 4th inductance ground connection.
5. according to claim 2 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described first trapper comprises: the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and the 5th inductance; One end of described the 5th electric capacity connects described duplexer, the other end of the 5th electric capacity by the 6th electric capacity connect described radio-frequency (RF) switch, also successively by the 7th electric capacity, the 5th inductance ground connection.
6. according to claim 1 and 2 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described second trapper comprises the 6th inductance, the 7th inductance, the 8th inductance and the 8th electric capacity; One end of described the 6th inductance connects the GPS filter, and the other end of the 6th inductance connects the 8th inductance by the 7th inductance a end is with gps antenna, also be connected an end and the gps antenna of the 8th inductance, the other end ground connection of described the 8th inductance by the 8th electric capacity.
7. according to claim 2 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described radio-frequency (RF) switch is that hilted broadsword is thrown analog switch more.
8. according to claim 1 for reducing the portable terminal of LTE emission to the interference of GPS, it is characterized in that described portable terminal is mobile phone or panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201265566U CN203135865U (en) | 2013-03-20 | 2013-03-20 | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201265566U CN203135865U (en) | 2013-03-20 | 2013-03-20 | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) |
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| CN203135865U true CN203135865U (en) | 2013-08-14 |
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| CN2013201265566U Expired - Lifetime CN203135865U (en) | 2013-03-20 | 2013-03-20 | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) |
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| CN105721002A (en) * | 2016-04-15 | 2016-06-29 | 努比亚技术有限公司 | Terminal filtering method, system and device and filtering terminal |
| CN106301462A (en) * | 2016-08-02 | 2017-01-04 | 广东欧珀移动通信有限公司 | Radio frequency control circuit and mobile terminal |
| CN107509210A (en) * | 2017-09-01 | 2017-12-22 | 捷开通讯(深圳)有限公司 | The method of the interference of mobile terminal, memory and reduction mobile terminal gps signal |
| CN107835034A (en) * | 2017-10-12 | 2018-03-23 | 惠州Tcl移动通信有限公司 | A kind of radio-frequency unit and mobile terminal for being used to solve GPS sensitivity deteriorations |
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