CN201113986Y - Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range - Google Patents
Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range Download PDFInfo
- Publication number
- CN201113986Y CN201113986Y CNU2007201730774U CN200720173077U CN201113986Y CN 201113986 Y CN201113986 Y CN 201113986Y CN U2007201730774 U CNU2007201730774 U CN U2007201730774U CN 200720173077 U CN200720173077 U CN 200720173077U CN 201113986 Y CN201113986 Y CN 201113986Y
- Authority
- CN
- China
- Prior art keywords
- processor
- mobile phone
- amplitude limiter
- frequency range
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The utility model discloses a device and a mobile phone for preventing radio frequency interference between frequency bands of a terminal, comprising a processor, an antenna switch and an acoustic surface filter, wherein, the processor is connected with the acoustic surface filter and the antenna switch in turn to form a signal receiving channel. The utility model also comprises an amplitude limiter, wherein, one end of the amplitude limiter is connected to a connecting wire between the processor and the acoustic surface filter while the other end is earthed. By adoption of the device and the mobile phone, the radio frequency interference between various frequency band signals of the terminal is effectively prevented and the voice quality of users is greatly improved.
Description
Technical field
The utility model relates generally to field of mobile communication, relates in particular to a kind of device and mobile phone that prevents radio frequency interference between the terminal frequency range.
Background technology
Developing rapidly of mobile communication technology effectively promoting mobile phone to miniaturization, and multiband and high performance direction develop.The multiband mobile phone does not distribute needs owing to do not need extra hardware circuit just can satisfy each national wireless frequency simultaneously, and in the international market good prospects for application is arranged.At present, existing multiband mobile phone is generally supported 850MHz, 900MHz, 1800MHz and four frequency ranges of 1900MHz.Continuous development along with integrated circuit, existing multiband mobile phone has all adopted the chip with high integration at radio frequency and baseband portion, thereby effectively promoted the miniaturization and the low cost of mobile phone, and made mobile phone integrated multiple frequency range and to realize that global roaming becomes pratical and feasible simultaneously.
Yet, there is certain defective in existing multiband mobile phone in the division of band limits, the transmit frequency band reception frequency range easy and another frequency range that is certain frequency range partially overlaps, for example, at global system for mobile communications (GSM, Global System For Mobile Communication) in, the reception frequency range of GSM850MHz frequency range is that 869MHz is to 894MHz, the transmit frequency band of GSM900 is that 880MHz is to 915MHz, wherein, a part of frequency range 880MHz in the transmit frequency band of GSM900 to 894MHz just in time with the reception frequency range of GSM850MHz frequency range in a part of frequency range 880MHz overlap to 894MHz, this power output of GSM900 of power amplifier output that will cause multiband mobile phone inside is after through the isolation decay of emission in the duplexer to receiving port, to have in the passage that certain power output enters the Surface Acoustic Wave Filter that receives the GSM850MHz frequency band signals, after this Surface Acoustic Wave Filter feeds back to transceiving chip with the power output that receives, enter frequency mixer and carry out secondary modulation, suppress thereby cause Surface Acoustic Wave Filter on the GSM850M receive path to carry out amplitude limit to the signal of the transmit frequency band of GSM900M.
Equally, for existing scattered control system (DCS, Distributed Control System) and person-to-person communication service (PCS, Personal Communication Service), also there is analogue.The reception frequency range of DCS is that 1805MHz is to 1880MHz, and the transmit frequency band of PCS is that 1850MHz is to 1910MHz, this shows that the 1850MHz of a part of frequency range in the reception frequency range of DCS will overlap to 1880MHz with a part of frequency range 1850MHz in the PCS transmit frequency band to 1880MHz.The power output of the PCS frequency range of power amplifier output is after the process isolation of duplexer, after a part will enter DCS Surface Acoustic Wave Filter passage and feed back to transceiving chip, enter frequency mixer and carry out secondary modulation, thereby cause the Surface Acoustic Wave Filter of DCS can't the frequency range of PCS emission be suppressed to the signal of 1880MHz at 1850MHz.
For above-mentioned two kinds of situations, if do not take appropriate measures, when switch switches to the transmitting terminal of 1800MHz or 1900MHz frequency band signals, for the area of only supporting the 1800MHz frequency range, mobile subscriber's conversation will be subjected to the emission interference of 1900MHz frequency range in this area.Equally, when switch switches to the transmitting terminal of 850MHz or 900MHz frequency band signals, for the area of only supporting the 850MHz frequency range, mobile subscriber's conversation also will be subjected to the emission interference of 900MHz frequency range in this area, thereby cause the reduction greatly of speech quality between the user.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of device and mobile phone that prevents radio frequency interference between the terminal frequency range, prevents radio frequency interference between each frequency band signals of terminal by this device, improves user's speech quality greatly.
The utility model provides a kind of device that prevents radio frequency interference between the terminal frequency range, comprising:
Processor, duplexer and Surface Acoustic Wave Filter, processor is connected to form the signal receive path with Surface Acoustic Wave Filter, duplexer successively;
This device also comprises:
Amplitude limiter, an end of amplitude limiter is connected to the connection line between processor and the Surface Acoustic Wave Filter, other end ground connection.
This installs described amplitude limiter with the interference signal ground of releasing; Described interference signal is the part power signal that produces at the processor receive path because of coupling effect.
This installs described amplitude limiter is diode.
This installs described processor is rf chip.
This device also comprises:
Dual-mode antenna links to each other with duplexer, is used for the signal of wireless transmission and a plurality of frequency ranges of reception.
The utility model also provides a kind of mobile phone that prevents radio frequency interference between the terminal frequency range, comprising:
Processor, duplexer and Surface Acoustic Wave Filter, processor is connected to form the signal receive path with Surface Acoustic Wave Filter, duplexer successively;
This mobile phone also comprises:
Amplitude limiter, an end of amplitude limiter is connected to the connection line between processor and the Surface Acoustic Wave Filter, other end ground connection.
The described amplitude limiter of this mobile phone is with the interference signal ground of releasing; Described interference signal is the part power signal that produces at the processor receive path because of coupling effect.
The described amplitude limiter of this mobile phone is a diode.
The described processor of this mobile phone is a rf chip.
This mobile phone also comprises:
Dual-mode antenna links to each other with duplexer, is used for the signal of wireless transmission and a plurality of frequency ranges of reception.
Device and the mobile phone that prevents radio frequency interference between the terminal frequency range described in the utility model, by shunt limiter on the circuit between transmitting-receiving radio frequency chip and the duplexer, the radio frequency interference ground of releasing between each frequency band signals that will produce because of coupling effect, reach and effectively prevent radio frequency interference between each frequency band signals of terminal, improve the beneficial effect of user's speech quality greatly.
Description of drawings
Fig. 1 is for preventing the structure drawing of device of radio frequency interference between the terminal frequency range in the utility model.
Embodiment
Describe the utility model in detail below in conjunction with drawings and the specific embodiments.
Fig. 1 comprises among the figure for preventing the structure drawing of device of radio frequency interference between the terminal frequency range in the utility model:
The 850MHz frequency range
This band transmit frequency range (850TX) is: 824MHz～849MHz;
This frequency range receive frequency range (850RX) is: 869MHz～894MHz.
The 900MHz frequency range
This band transmit frequency range (900TX) is: 880MHz～915MHz;
This frequency range receive frequency range (900RX) is: 925MHz～960MHz.
The 1800MHz frequency range
This band transmit frequency range (1800TX): 1710MHz～1785MHz;
This frequency range receive frequency range (1800RX): 1805MHz～1880MHz.
The 1900MHz frequency range
This band transmit frequency range (1900TX): 1850MHz～1910MHz;
This frequency range receive frequency range (1900RX): 1930MHz～1990MHz.
First pin one 011 is used to receive the 1800MHz frequency band signals;
Second pin one 012 is used to receive the 1900MHz frequency band signals;
Three-prong 1013 is used to send 1800MHz or 1900MHz frequency band signals;
The 4th pin one 014 is used to receive the 850MHz frequency band signals;
The 5th pin one 015 is used to receive the 900MHz frequency band signals;
The 6th pin one 016 is used to send 850MHz or 900MHz frequency band signals.
1800RX Surface Acoustic Wave Filter 102 is used for the 1800MHz frequency band signals that receives is carried out Filtering Processing.
Duplexer 103 is used to control the conducting of each road transmission and received signal passage.
First receives pin 1031, is used to send the 1800MHz frequency band signals that receives by dual-mode antenna 110;
Second receives pin 1032, is used to send the 1900MHz frequency band signals that receives by dual-mode antenna 110;
The 3rd receives pin 1033, is used for 1800MHz or 1900MHz frequency band signals that received RF transceiving chip 101 sends;
The 4th receives pin 1034, is used to send the 850MHz frequency band signals that receives by dual-mode antenna 110;
The 5th receives pin 1035, is used to send the 900MHz frequency band signals that receives by dual-mode antenna 110;
The 6th receives pin 1036, is used for 850MHz or 900MHz frequency band signals that received RF transceiving chip 101 sends;
By the handover operation of duplexer 103, the conducting of the transmitt or receive signal passage of control transmit receive antenna 110 and rf chip 101, thus realize transmission and the reception of rf chip 101 to each frequency band signals.
850RX Surface Acoustic Wave Filter 104 is used for the 850MHz frequency band signals that receives is carried out Filtering Processing.
Because after diode had forward conduction, therefore the characteristic that the forward voltage drop on it remains unchanged substantially, usually as a kind of clipping element, limited signal amplitude within the specific limits in circuit.First amplitude limiter 105 in this specific embodiment and second amplitude limiter 106 are exactly to adopt diode to realize restriction to signal amplitude.
1900RX Surface Acoustic Wave Filter 107 is used for the 1900MHz frequency band signals that receives is carried out Filtering Processing.
900RX Surface Acoustic Wave Filter 108 is used for the 900MHz frequency band signals that receives is carried out Filtering Processing.
Dual-mode antenna 110 links to each other with duplexer 109, is used for the signal of wireless transmission and each frequency range of reception.
First pin one 011 of rf chip 101 receives pin 1031 through 1800RX Surface Acoustic Wave Filter 102 with first of duplexer 103 and is connected;
Second pin one 012 of rf chip 101 is connected with second pin one 032 of duplexer 103 through 1900RX Surface Acoustic Wave Filter 107;
The three-prong 1013 of rf chip 101 is connected with first input pin 1091 of power amplifier 109; First output pin 1093 receives pin 1033 with the 3rd of duplexer 103 and is connected;
The 4th pin one 014 of rf chip 101 receives pin 1034 through 8500RX Surface Acoustic Wave Filter 104 with the 4th of duplexer 103 and is connected;
The 5th pin one 015 of rf chip 101 receives pin 1035 through 900RX Surface Acoustic Wave Filter 108 with the 5th of duplexer 103 and is connected;
The 6th pin one 016 of rf chip 101 is connected with second input pin 1092 of power amplifier 109; Second output pin 1094 receives pin 1036 with the 6th of duplexer 103 and is connected;
In addition, an end of first amplitude limiter 105 is connected to parallel way on first pin one 011 and the connection line between the 1800RX Surface Acoustic Wave Filter 102 of rf chip 101, the other end ground connection of first amplitude limiter 105; On one end of second amplitude limiter 106 is connected to rf chip 101 with parallel way pin one 014 and the connection line of 850RX Surface Acoustic Wave Filter 104, the other end ground connection of second amplitude limiter 106.
Operation principle of the present utility model is:
When duplexer 103 controls the 3rd receive pin 1033 with dual-mode antenna 110 conductings, the three-prong 1013 of rf chip 101 will send 1800MHz or the 1900MHz frequency band signals amplifies the three-prong 1033 that the back arrives dual-mode antenna 110 through power amplifier 109, by dual-mode antenna 110 this 1800MHz or 1900MHz frequency band signals are sent, because in signal wireless transmitting-receiving process, duplexer 103 can not shield 1800MHz on the device three-prong 1033 or 1900MHz frequency band signals fully, the part power signal of 1800MHz or 1900MHz frequency band signals will be coupled to first and receive on the pin 1031, this part power signal will receive pin 1031 by first and arrive 1800RX Surface Acoustic Wave Filter 102, because can't suppressing it, 1800RX Surface Acoustic Wave Filter 102 overlaps the power signal of frequency range 1850MHz to 1880MHz, therefore, to produce interference signal on first pin one 011 of rf chip 101, this interference signal will form a certain size direct voltage.Because an end of first amplitude limiter 105 is connected on first pin one 011 and the connection line between the 1800RX Surface Acoustic Wave Filter 102 of rf chip 101 in the utility model with parallel way, the other end ground connection of first amplitude limiter 105, therefore, this direct voltage will make first amplitude limiter, 105 forward conductions, thereby make this part power signal of producing because of coupling effect by this first amplitude limiter 105 ground of releasing.
When duplexer 103 controls the 6th receive pin 1036 with dual-mode antenna 110 conductings, the 6th pin one 016 of rf chip 101 will send 850MHz or the 900MHz frequency band signals amplifies the 6th pin one 036 that the back arrives dual-mode antenna 110 through power amplifier 109, by dual-mode antenna 110 this 850MHz or 900MHz frequency band signals are sent, because in signal wireless transmitting-receiving process, duplexer 103 can not shield 850MHz or 900MHz frequency band signals on device the 6th pin one 036 fully, the part power signal of 850MHz or 900MHz frequency band signals will be coupled to the 4th and receive on the pin 1034, this part power signal will receive pin 1034 by the 4th and arrive 850RX Surface Acoustic Wave Filter 104, because can't suppressing it, 850RX Surface Acoustic Wave Filter 104 overlaps the power signal of frequency range 869MHz to 893MHz, therefore, to produce interference signal on the 4th pin one 014 of rf chip 101, this interference signal will form a certain size direct voltage.Because the utility model is connected to an end of first amplitude limiter 106 on the 4th pin one 014 and the connection line between the 850RX Surface Acoustic Wave Filter 104 of rf chip 101 with parallel way, the other end ground connection of second amplitude limiter 106, therefore, this direct voltage will make first amplitude limiter, 106 forward conductions, thereby make this part power signal of producing because of coupling effect by this first amplitude limiter 106 ground of releasing.
When duplexer 103 is in accepting state, owing to there is not signal, therefore can not produce direct voltage on the pin one 011 of rf chip 101 and the pin one 014, amplitude limiter will be in closed condition, thereby can the receiving sensitivity of device not impacted.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. device that prevents radio frequency interference between the terminal frequency range comprises:
Processor, duplexer and Surface Acoustic Wave Filter, processor is connected to form the signal receive path with Surface Acoustic Wave Filter, duplexer successively;
It is characterized in that, also comprise:
Amplitude limiter, an end of amplitude limiter is connected to the connection line between processor and the Surface Acoustic Wave Filter, other end ground connection.
2. device according to claim 1 is characterized in that,
Described amplitude limiter is with the interference signal ground of releasing; Described interference signal is the part power signal that produces at the processor receive path because of coupling effect.
3. according to any described device of claim 1 to 2, it is characterized in that described amplitude limiter is a diode.
4. device according to claim 3 is characterized in that, described processor is a rf chip.
5. device according to claim 4 is characterized in that, this device also comprises:
Dual-mode antenna links to each other with duplexer, is used for the signal of wireless transmission and a plurality of frequency ranges of reception.
6. mobile phone that prevents radio frequency interference between the terminal frequency range comprises:
Processor, duplexer and Surface Acoustic Wave Filter, processor is connected to form the signal receive path with Surface Acoustic Wave Filter, duplexer successively;
It is characterized in that, also comprise:
Amplitude limiter, an end of amplitude limiter is connected to the connection line between processor and the Surface Acoustic Wave Filter, other end ground connection.
7. mobile phone according to claim 1 is characterized in that,
Described amplitude limiter is with the interference signal ground of releasing; Described interference signal is the part power signal that produces at the processor receive path because of coupling effect.
8. according to any described mobile phone of claim 1 to 2, it is characterized in that described amplitude limiter is a diode.
9. any according to Claim 8 described mobile phone is characterized in that described processor is a rf chip.
10. mobile phone according to claim 9 is characterized in that, this mobile phone also comprises:
Dual-mode antenna links to each other with duplexer, is used for the signal of wireless transmission and a plurality of frequency ranges of reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201730774U CN201113986Y (en) | 2007-09-11 | 2007-09-11 | Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201730774U CN201113986Y (en) | 2007-09-11 | 2007-09-11 | Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201113986Y true CN201113986Y (en) | 2008-09-10 |
Family
ID=39965734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201730774U Expired - Fee Related CN201113986Y (en) | 2007-09-11 | 2007-09-11 | Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201113986Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009764A (en) * | 2013-02-27 | 2014-08-27 | 联想(北京)有限公司 | Signal processing method and electronic equipment |
| CN107506095A (en) * | 2017-08-31 | 2017-12-22 | 广东欧珀移动通信有限公司 | Light is close to sensing circuit and electronic equipment |
| CN108270463A (en) * | 2016-12-29 | 2018-07-10 | 联芯科技有限公司 | Radio frequency front-end device |
-
2007
- 2007-09-11 CN CNU2007201730774U patent/CN201113986Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009764A (en) * | 2013-02-27 | 2014-08-27 | 联想(北京)有限公司 | Signal processing method and electronic equipment |
| CN108270463A (en) * | 2016-12-29 | 2018-07-10 | 联芯科技有限公司 | Radio frequency front-end device |
| CN108270463B (en) * | 2016-12-29 | 2020-06-09 | 联芯科技有限公司 | Radio frequency front end device |
| CN107506095A (en) * | 2017-08-31 | 2017-12-22 | 广东欧珀移动通信有限公司 | Light is close to sensing circuit and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111327344B (en) | Radio frequency system and electronic equipment | |
| US10084235B2 (en) | Feeding matching apparatus of multiband antenna, multiband antenna, and radio communication device | |
| KR101280127B1 (en) | Multiband or multimode front end antenna switch | |
| KR100698971B1 (en) | Dual band radio telephone with dedicated receive and transmit antennas and related method | |
| EP4287516A1 (en) | Radio frequency pa mid device, radio frequency system and communication device | |
| US7412255B2 (en) | Antenna arrangement and mobile terminal device | |
| WO2015154437A1 (en) | Carrier aggregation supporting method and terminal | |
| US10015701B2 (en) | Multimode dual-path terminal | |
| CN106252845A (en) | A kind of antenna, carrier radio frequency circuit, terminal and carrier polymerizing method | |
| CN101663825A (en) | Multiple impedance matching networks for multiband transceivers | |
| CN102510297A (en) | Power amplification module, multi-mode radio frequency transceiver, duplexer and multi-mode terminal | |
| CN201388196Y (en) | Mobile terminal realizing the multiband matching of antennas | |
| CN201278522Y (en) | Radio frequency front-end circuit for mobile terminal system | |
| CN100579269C (en) | Device for improving influence on CDMA sensitivity from GSM switch in dual modes handset | |
| CN102833010B (en) | A kind of passive intermodulation ameliorative way of base stations in mobile communication system signal | |
| CN102332929B (en) | Dual-mode radio frequency module, dual-mode radio frequency sending, receiving method and user terminal | |
| US7463875B2 (en) | Wireless device minimizing use of external bandpass filter between low-noise amplifier and first mixer | |
| CN201113986Y (en) | Device and mobile phone for preventing terminal radio frequency interference between terminal frequency range | |
| CN101364791A (en) | Low noise amplifier with multiband variable gain | |
| CN1551658B (en) | Mobile communication terminal supporting three pattern communication mode | |
| CN101521519A (en) | Signal transceiver for radio communication device | |
| Ikonen et al. | Multi-feed RF front-ends and cellular antennas for next generation smartphones | |
| CN208904990U (en) | There is the cellular radio circuit of GSM | |
| TW201801397A (en) | Triple feed point type and eight-band antenna for LTE-A smart phone | |
| CN201663236U (en) | Antenna and mobile terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080910 Termination date: 20130911 |