CN103051352A - Multimode multifrequency transceiver - Google Patents
Multimode multifrequency transceiver Download PDFInfo
- Publication number
- CN103051352A CN103051352A CN2012105443100A CN201210544310A CN103051352A CN 103051352 A CN103051352 A CN 103051352A CN 2012105443100 A CN2012105443100 A CN 2012105443100A CN 201210544310 A CN201210544310 A CN 201210544310A CN 103051352 A CN103051352 A CN 103051352A
- Authority
- CN
- China
- Prior art keywords
- frequency
- analog baseband
- conversion mixer
- radio frequency
- baseband 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.)
- Pending
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses a multimode multifrequency transceiver, which comprises a radio frequency front-end module, an analog baseband module and a frequency synthesizer module. The frequency front-end module comprises a plurality of radio frequency links used for receiving and dispatching signals in different frequency ranges; the analog baseband module comprises an analog baseband signal receiving link and an analog baseband signal emission link, and is used for carrying out filter and amplification on signals sent by the radio frequency links, converting the signals into digital signals, carrying out digital to analog conversion and filtering amplification processing on signals transmitted by a digital baseband, and outputting the signals to the radio frequency links, and the multimode multifrequency transceiver shares the analog baseband signal receiving link and the analog baseband signal emission link; and the frequency synthesizer module is utilized to provide different eigenfrequencies for the plurality of radio frequency links. The working frequency bandwidth of the ultrawideband multimode multifrequency transceiver provided by the invention can cover 0.3GHz to 6GHz, so that the ultrawideband multimode multifrequency transceiver is suitable for a plurality of different wireless communication standards.
Description
Technical field
The present invention relates to integrated circuit fields, particularly a kind of multimode, Multi-Frequency Signaling System.
Background technology
Along with the develop rapidly of wireless communication technology, new technology and standard emerge in an endless stream, the user wishes can be by the multimode terminal in the hand, optionally accessing corresponding network according to oneself demand communicates, realize communication flexible, convenient, that absolute liBerty is linked up, following development trend will be the continuous fusion between various wireless technologys.Simultaneously, in the civil standards frequency range of generally using (such as the frequency range of＜6GHz), a large amount of and communication, mobile, frequency range existence that satellite fix is relevant are wherein.
For example, UHF wave band (470-798MHz) and S-band (2635-2660MHz) are the China Digital TV frequency range.Along with the high speed development of wireless communication technique, the DMB technology is pregnant with new life, and its development will promote the change of whole radio and television industry.Chinese market has powerful market-driven to the DVB technology.On August 30th, 2006, Chinese digital multimedia TV ground transmission standard GB20600-2006 put into effect; On October 24th, 2006, SARFT(The State Administration of Radio and Television) adopts the autonomous CMMB that proposes as the mobile TV industry standard, the great development of determining to trigger the DTV industry of industry standard, and Chinese high definition DTV will all activate.The CMMB system is towards multiple portable terminals such as mobile phone, PDA and notebook computers, utilize S-band and U wave band to augment network, realize that " world " one covers, whole nation roaming, adopt simultaneously the device of the large power consumption such as time slot switch antenna, tuner, thereby greatly reduce mobile terminal power consumption, Effective Raise the flying power of terminal, the formal operation since 2009 of CMMB.
Again for example, GPS/ Big Dipper BD-II B2﹠amp; The B3 frequency range (1166 ~ 1286MHz) and Big Dipper BD-II B1 frequency range (1561MHz) be that frequency range is located in common satellite navigation.From 2000, China began to build the Beidou satellite navigation system that has independent intellectual property right, develops into the second generation from the first generation now.The Big Dipper two generations satellite navigation system is comprised of five satellites and 30 non-geo satellites.The Big Dipper two generations satellite navigation system provides open service and authorization service to the whole world, 10 meters of positioning accuracies, and time service precision is 50ns, rate accuracy 0.2m/s.About 2012, " Big Dipper " system will have location, navigation and time service and the short message communication service capabilities that covers the Asian-Pacific area, plan in the year two thousand twenty covering the whole world.
This shows, in 6GHz, have this application band a large amount of and human lives is closely bound up.As a rule, present radio frequency transceiver is a kind of frequency range and a kind of pattern (single mode single-frequency) application design, and the application of multiband needs a plurality of radio frequency transceiver co-operation usually, has not only increased power consumption, has also increased the cost of chip.Therefore, how to realize that a kind of frequency working range can cover 6GHz with multi-mode, multiband (multimode multi-frequency) transceiver of interior super wide spectrum, becomes current important topic.
Summary of the invention
In order to reach above-mentioned purpose, the invention provides a kind of multimode multi-frequency transceiver, comprise RF front-end module, the signal that is used for the transmitting-receiving different frequency range, described RF front-end module comprises a plurality of radio frequency links, each described radio frequency link comprises low noise amplifier and the down-conversion mixer of serial connection, the power amplifier of serial connection and up-conversion mixer, and the dual-mode antenna that couples with described low noise amplifier and described power amplifier;
The Analog Baseband module comprises an analog baseband signal receiver and an analog baseband signal transmitting chain, and described multimode multi-frequency transceiver shares described analog baseband signal transmitting chain and described analog baseband signal receiver; Described analog baseband signal receiver couples the down-conversion mixer of described a plurality of radio frequency links, and the signal that is used for described receiver module is sent carries out filter and amplification and is converted to digital signal; Described analog baseband signal transmitting chain couples the up-conversion mixer of described a plurality of radio frequency links, and the signal that is used for digital baseband is transmitted carries out digital-to-analogue conversion, and described up-conversion mixer is processed and exported to amplification filtering; And
The frequency synthesizer module, it comprises a plurality of intrinsic signals outputs, input with described a plurality of up-conversion mixers, down-conversion mixer joins respectively, provides different eigenfrequencies with up-conversion mixer, down-conversion mixer to described a plurality of radio frequency links.
Preferably, described analog baseband signal receiver comprises successively channel optional filter, the first variable gain amplifier and the analog-digital converter of serial connection, and dc shift is removed circuit; Described analog baseband signal transmitting chain comprises successively digital analog converter, the second variable gain amplifier and the optional low pass filter of channel of serial connection, and dc shift is removed circuit.
Preferably, described RF front-end module comprises three radio frequency links, is respectively applied to receive and dispatch the radiofrequency signal that frequency range is 0.3GHz～1.5GHz, 2.3GHz～2.7GHz and 3.1GHz～6GHz.
Preferably, described frequency synthesizer module comprises four intrinsic signals outputs, and wherein the input of the up-conversion mixer of two intrinsic signals outputs and same described radio frequency link, down-conversion mixer joins.
Preferably, described down-conversion mixer and up-conversion mixer are the fully differential gilbert mixer.
Preferably, described channel optional filter and the optional low pass filter of channel are 8 rank chebyshev low-pass filters, are used for the signal of different frequency range is carried out the filtering processing.
The invention has the advantages that, by the radio-frequency front-end with the different frequency range territory signal is carried out radio frequency processing, and give the same Analog Baseband that is applied to the ultratvide frequency band territory and carry out filtering, amplification, and the eigenfrequency that provides all radio-frequency front-ends to use by the frequency synthesizer in same ultratvide frequency band territory, thereby realize supporting multimode, multifrequency and many employing wireless transceiver of each frequency range.
Description of drawings
The structural representation of embodiment of the invention multimode multi-frequency transceiver shown in Figure 1.
Embodiment
For making content of the present invention more clear understandable, below in conjunction with Figure of description, content of the present invention is described further.Certainly the present invention is not limited to this specific embodiment, and the known general replacement of those skilled in the art also is encompassed in protection scope of the present invention.
Please refer to Fig. 1, multimode multi-frequency transceiver of the present invention comprises RF front-end module 100, Analog Baseband module 200, frequency synthesizer module 300.
RF front-end module 100 comprises a plurality of radio frequency links, and in the present embodiment, radio frequency link is 3, is respectively to be applied to 0.3GHz～1.5GHz frequency range, 2.3GHz～2.7GHz frequency range and to be applied to 3.1GHz～6GHz frequency range.Each radio frequency link comprises low noise amplifier and the down-conversion mixer of serial connection, the power amplifier of serial connection and up-conversion mixer, and the dual-mode antenna that couples with described low noise amplifier and described power amplifier.
The application that the first radio frequency link covers comprises the WiMAX of CMMB, 300～800MHz frequency range of UHF wave band and the GPS/ Big Dipper two generations B1, B2, B3 frequency range.The first radio frequency link comprises 0.3GHz～1.5GHz low noise amplifier 111,0.3GHz～1.5GHz down-conversion mixer 112,0.3GHz～1.5GHz up-conversion mixer 113,0.3GHz～1.5GHz power amplifier 114 and 0.3GHz～1.5GHz band antenna 115.Wherein low noise amplifier 111 adopts the noise canceller circuit structure of single-ended transfer difference to realize, in a preferred embodiment of the invention, down-conversion mixer 112 all adopts fully differential gilbert mixer structure to realize with up-conversion mixer 113, and power amplifier 114 adopts the Class-A power amplifier to realize.In addition, low noise amplifier can be the low noise amplifier of gain-variable.
The second radio frequency link is applied to CMMB, the 2.45GHz WLAN of S-band and the WiMAX of 2.3 ~ 2.7GHz frequency range, has comprised 2.3GHz～2.7GHz low noise amplifier 121,2.3GHz～2.7GHz down-conversion mixer 122,2.3GHz～2.7GHz up-conversion mixer 123,2.3GHz～2.7GHz power amplifier 124 and 2.3GHz～2.7GHz band antenna 125.Wherein, low noise amplifier 121 adopts the noise canceller circuit structure of single-ended transfer difference to realize that same, it also can be the gain-variable low noise amplifier.Down-conversion mixer 122 all adopts fully differential gilbert mixer structure to realize with up-conversion mixer 123, and power amplifier 124 adopts the Class-AB power amplifier to realize.
The 3rd radio frequency link is applied to OFDM UWB, IR UWB and 5.1 ~ 5.8GHz WLAN, comprises 3.1GHz～6GHz low noise amplifier 131,3.1GHz～6GHz down-conversion mixer 132,3.1GHz～6GHz up-conversion mixer 133,3.1GHz～6GHz power amplifier 134 and 3.1GHz～6GHz band antenna 135.Wherein low noise amplifier 131 adopts the noise canceller circuit structure of single-ended transfer difference to realize, can be the gain-variable low noise amplifier.Down-conversion mixer 132 all adopts fully differential gilbert mixer structure to realize with up-conversion mixer 133, and power amplifier 134 adopts the Class-E power amplifier to realize.
As known from the above, the RF front-end module of transceiver can satisfy 0.3GHz～1.5GHz in the present embodiment, three frequency range territories of 2.3GHz～2.7GHz and 3.1GHz～6GHz.
Please continue with reference to figure 1, Analog Baseband module 200 comprises analog baseband signal receiver and analog baseband signal transmitting chain.It should be noted that the multimode multi-frequency transceiver shares same analog baseband signal transmitting chain and analog baseband signal receiver among the present invention.Wherein, the analog baseband signal receiver comprises successively channel optional filter (Channel SelectFilter) 211, variable gain amplifier (Variable Gain Amplifier) 212, the analog-digital converter (ADC) 213 of serial connection.Wherein, channel optional filter 211 adopts 8 rank chebyshev low-pass filter structures to realize, variable gain amplifier 212 adopts the resistance feedback structure to realize, analog-digital converter 214 adopts 12bit 200M flow line structure ADC to realize.In addition, the analog baseband signal receiver also comprises dc shift removal circuit (DC offset Cancellation) 214, link to each other with channel optional filter 211, be used for channel optional filter 211 filtered signals are carried out the dc shift Transformatin, dc shift is removed circuit 214 and is realized based on the high performance operational amplifier feedback arrangement.
The analog baseband signal transmitting chain comprises successively digital analog converter (DAC) 223, variable gain amplifier (VGA) 222, the low pass filter (Low Pass Filter) 221 of serial connection.Wherein, digital analog converter 223 adopts 14bit 250MDAC to realize, variable gain amplifier 222 adopts the resistance feedback structure to realize that low pass filter 224 is the optional low pass filter of channel, adopts 8 rank chebyshev low-pass filter structures to realize.The analog baseband signal transmitting chain also can comprise dc shift removal circuit (DC offset Cancellation) 224, link to each other with the optional low pass filter 221 of channel, be used for its filtered signal is carried out the dc shift Transformatin, dc shift is removed circuit 224 and can be realized based on the high performance operational amplifier feedback arrangement.As known from the above, transceiver shares same Analog Baseband module 200, and Analog Baseband module 200 is applied to the ultratvide frequency band territory, can carry out filter amplifying processing to the signal of different frequency range.
In addition, the multimode multi-frequency transceiver also comprises other supplementary modules, such as I2C digital control module (Digital Ctrl), current reference module (I-Ref) and band-gap reference module (Band-Gap) etc., it is transceiver functional module commonly used, be well known to those skilled in the art, do not do at this and give unnecessary details.
Below will sketch the working method of ultratvide frequency band multimode multi-frequency transceiver:
When ultratvide frequency band multimode multi-frequency transceiver uses and is operated in 0.3GHz～1.5GHz frequency range as receiver, the signal that low noise amplifier 111 receives antenna 115 is transferred to down-conversion mixer 112 and is carried out down-conversion, thereby the radiofrequency signal of different communication protocol in 0.3GHz～1.5GHz is down-converted to direct current signal.Signal after the frequency conversion carries out channel selection processing and filtering via the channel optional filter 211 of analog baseband signal receiver, then transfers to variable gain amplifier 212 and amplifies.In this course, owing to there is the dc shift problem, the signal that therefore needs dc shift to remove 213 pairs of filter 211 filtering of circuit carries out the dc shift Transformatin.Finally, give analog-digital converter 214 through the signal after the processing such as reception, frequency conversion, filtering, amplification, be converted to digital signal and give follow-up digital base band processor.
When ultratvide frequency band multimode multi-frequency transceiver uses and is operated in 0.3GHz～1.5GHz frequency range as transmitter, analog baseband signal transmitting chain digital analog converter 223 will be converted into analog signal from the signal that digital baseband transmits, amplify via variable gain amplifier 222, the signal that variable gain amplifier 222 transmitted for different agreement of the optional low pass filter 223 of channel carries out channel and selects afterwards, and carries out low-pass filtering treatment.In this course, owing to there is the dc shift problem, therefore needs described dc shift to remove 224 pairs of low pass filters of circuit, 223 filtered signals and carry out the dc shift Transformatin.To give up-conversion mixer 113 through the signal after the processing such as digital-to-analogue conversion, amplification, filtering and carry out frequency conversion, low noise amplifier 111 amplifies the signal after the frequency conversion, and launches via 0.3GHz～1.5GHz band antenna 115.
When ultratvide frequency band multimode multi-frequency transceiver folding and unfolding 2.3GHz～2.7GHz frequency range and 3.1GHz～6GHz frequency band signals, the front radio-frequency module is selected respectively 2.3GHz～2.7GHz radio frequency link 120 and 3.1GHz～6GHz radio frequency link 130, its working method is identical with 0.3GHz～1.5GHz frequency range, does not add to give unnecessary details at this.
In sum, the present invention adopts the radio-frequency front-end in different frequency range territory that signal is carried out radio frequency processing, and give the same Analog Baseband that is applied to the ultratvide frequency band territory and carry out filtering, amplification, and the eigenfrequency that all radio-frequency front-ends need to be used is all provided by the frequency synthesizer in same ultratvide frequency band territory.
Although the present invention discloses as above with preferred embodiment; right described many embodiment only give an example for convenience of explanation; be not to limit the present invention; those skilled in the art can do some changes and retouching without departing from the spirit and scope of the present invention, and the protection range that the present invention advocates should be as the criterion so that claims are described.
Claims (6)
1. a multimode multi-frequency transceiver is characterized in that, comprising:
RF front-end module, the signal that is used for the transmitting-receiving different frequency range, described RF front-end module comprises a plurality of radio frequency links, each described radio frequency link comprises low noise amplifier and the down-conversion mixer of serial connection, power amplifier and the up-conversion mixer of serial connection, and the dual-mode antenna that couples with described low noise amplifier and described power amplifier;
The Analog Baseband module comprises an analog baseband signal receiver and an analog baseband signal transmitting chain, and described multimode multi-frequency transceiver shares described analog baseband signal transmitting chain and described analog baseband signal receiver; Described analog baseband signal receiver couples the down-conversion mixer of described a plurality of radio frequency links, and the signal that is used for described down-conversion mixer is sent carries out filter and amplification and is converted to digital signal; Described analog baseband signal transmitting chain couples the up-conversion mixer of described a plurality of radio frequency links, and the signal that is used for digital baseband is transmitted carries out digital-to-analogue conversion, and described up-conversion mixer is processed and exported to amplification filtering; And
The frequency synthesizer module comprises a plurality of intrinsic signals outputs, and the input with described a plurality of up-conversion mixers, down-conversion mixer joins respectively, provides different eigenfrequencies with up-conversion mixer, down-conversion mixer to described a plurality of radio frequency links.
2. multimode multi-frequency transceiver according to claim 1 is characterized in that,
Described analog baseband signal receiver comprises successively channel optional filter, the first variable gain amplifier and the analog-digital converter of serial connection, and dc shift is removed circuit;
Described analog baseband signal transmitting chain comprises successively digital analog converter, the second variable gain amplifier and the optional low pass filter of channel of serial connection, and dc shift is removed circuit.
3. multimode multi-frequency transceiver according to claim 2 is characterized in that, described RF front-end module comprises three radio frequency links, is respectively applied to receive and dispatch the radiofrequency signal that frequency range is 0.3GHz～1.5GHz, 2.3GHz～2.7GHz and 3.1GHz～6GHz.
4. multimode multi-frequency transceiver according to claim 3, it is characterized in that, described frequency synthesizer module comprises four intrinsic signals outputs, and wherein the input of the up-conversion mixer of two intrinsic signals outputs and same described radio frequency link, down-conversion mixer joins.
5. multimode multi-frequency transceiver according to claim 1 is characterized in that, described down-conversion mixer and up-conversion mixer are the fully differential gilbert mixer.
6. multimode multi-frequency transceiver according to claim 1 is characterized in that,
Described channel optional filter and the optional low pass filter of channel are 8 rank chebyshev low-pass filters, are used for the signal of different frequency range is carried out the filtering processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105443100A CN103051352A (en) | 2012-12-14 | 2012-12-14 | Multimode multifrequency transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105443100A CN103051352A (en) | 2012-12-14 | 2012-12-14 | Multimode multifrequency transceiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103051352A true CN103051352A (en) | 2013-04-17 |
Family
ID=48063867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105443100A Pending CN103051352A (en) | 2012-12-14 | 2012-12-14 | Multimode multifrequency transceiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103051352A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372683A (en) * | 2015-03-31 | 2016-03-02 | 中国科学院上海技术物理研究所 | Real-time signal receiving and processing system of public frequency points of Beidou navigation satellite system and GPS |
| CN105450370A (en) * | 2014-06-27 | 2016-03-30 | 展讯通信（上海）有限公司 | Carrier aggregation uplink transmission device, and control method and apparatus therefor |
| CN105721014A (en) * | 2014-12-16 | 2016-06-29 | 苹果公司 | Wireless Electronic Device With Multiradio Controller Integrated Circuit |
| CN107124712A (en) * | 2017-04-17 | 2017-09-01 | 湖南超云信息科技有限公司 | A kind of method that LTE detects code, system and equipment |
| CN107786688A (en) * | 2016-08-26 | 2018-03-09 | 展讯通信（上海）有限公司 | Mobile terminal with intercom function |
| CN110208826A (en) * | 2019-05-29 | 2019-09-06 | 哈尔滨工程大学 | A kind of digital satellite smart antenna of multimode multi-frequency |
| CN110535483A (en) * | 2019-07-26 | 2019-12-03 | 华为技术有限公司 | Communication module and terminal |
| CN111835379A (en) * | 2020-07-06 | 2020-10-27 | 上海橙群微电子有限公司 | Radio frequency transceiver and radio frequency transceiving system |
| CN112886983A (en) * | 2021-01-25 | 2021-06-01 | 维沃移动通信有限公司 | Communication transceiver and terminal device |
| WO2021184371A1 (en) * | 2020-03-20 | 2021-09-23 | 华为技术有限公司 | Receiving apparatus, transmitting apparatus, and signal processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060062279A1 (en) * | 2004-09-23 | 2006-03-23 | Realtek Semiconductor Corp. | Digital frequency hopping transceiver and method thereof |
| CN101316105A (en) * | 2008-06-11 | 2008-12-03 | 苏州中科半导体集成技术研发中心有限公司 | Multi-standard multi-module wireless transceiver |
| CN102404529A (en) * | 2011-12-30 | 2012-04-04 | 上海集成电路研发中心有限公司 | Digital television tuner receiver system |
-
2012
- 2012-12-14 CN CN2012105443100A patent/CN103051352A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060062279A1 (en) * | 2004-09-23 | 2006-03-23 | Realtek Semiconductor Corp. | Digital frequency hopping transceiver and method thereof |
| CN101316105A (en) * | 2008-06-11 | 2008-12-03 | 苏州中科半导体集成技术研发中心有限公司 | Multi-standard multi-module wireless transceiver |
| CN102404529A (en) * | 2011-12-30 | 2012-04-04 | 上海集成电路研发中心有限公司 | Digital television tuner receiver system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105450370B (en) * | 2014-06-27 | 2019-11-05 | 展讯通信（上海）有限公司 | The uplink device and its control method and device of carrier wave polymerization |
| CN105450370A (en) * | 2014-06-27 | 2016-03-30 | 展讯通信（上海）有限公司 | Carrier aggregation uplink transmission device, and control method and apparatus therefor |
| CN105721014A (en) * | 2014-12-16 | 2016-06-29 | 苹果公司 | Wireless Electronic Device With Multiradio Controller Integrated Circuit |
| US9930725B2 (en) | 2014-12-16 | 2018-03-27 | Apple Inc. | Wireless electronic device with multiradio controller integrated circuit |
| CN105372683A (en) * | 2015-03-31 | 2016-03-02 | 中国科学院上海技术物理研究所 | Real-time signal receiving and processing system of public frequency points of Beidou navigation satellite system and GPS |
| CN107786688A (en) * | 2016-08-26 | 2018-03-09 | 展讯通信（上海）有限公司 | Mobile terminal with intercom function |
| CN107124712A (en) * | 2017-04-17 | 2017-09-01 | 湖南超云信息科技有限公司 | A kind of method that LTE detects code, system and equipment |
| CN110208826A (en) * | 2019-05-29 | 2019-09-06 | 哈尔滨工程大学 | A kind of digital satellite smart antenna of multimode multi-frequency |
| CN110535483A (en) * | 2019-07-26 | 2019-12-03 | 华为技术有限公司 | Communication module and terminal |
| CN110535483B (en) * | 2019-07-26 | 2021-01-15 | 华为技术有限公司 | Communication module and terminal |
| WO2021184371A1 (en) * | 2020-03-20 | 2021-09-23 | 华为技术有限公司 | Receiving apparatus, transmitting apparatus, and signal processing method |
| CN111835379A (en) * | 2020-07-06 | 2020-10-27 | 上海橙群微电子有限公司 | Radio frequency transceiver and radio frequency transceiving system |
| CN112886983A (en) * | 2021-01-25 | 2021-06-01 | 维沃移动通信有限公司 | Communication transceiver and terminal device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103051352A (en) | Multimode multifrequency transceiver | |
| US6088348A (en) | Configurable single and dual VCOs for dual- and tri-band wireless communication systems | |
| CN101242158B (en) | A configurable and reconstructable dynamic frequency mixer | |
| US20070243832A1 (en) | Multimode/Multiband Mobile Station and Method for Operating the Same | |
| US7761078B2 (en) | Dual inductor circuit for multi-band wireless communication device | |
| US9154217B1 (en) | Direct conversion remote satellite communications terminal | |
| CN102832959B (en) | Radio-frequency front end in high and medium frequency superheterodyne+zero intermediate frequency structure | |
| EP1726098A1 (en) | Multimode/multiband mobile station and method for operating the same | |
| CN103209147B (en) | A kind of multiband millimeter wave receiver and method | |
| CN104749591A (en) | Global navigation satellite system oriented multi-mode parallel radio-frequency receiver | |
| EP1249075A1 (en) | An rf front-end with a multistage stepdown filtering architecture | |
| KR101620039B1 (en) | Simultaneous signal receiver with interspersed frequency allocation | |
| CN101931424A (en) | Short-wave radio frequency digital processing module | |
| CN102611476A (en) | Twice frequency conversion structure transceiver for 60GHz wireless communication | |
| CN101872010B (en) | Big Dipper/GPS (Global Position System) signal power divider and manufacture method thereof and dual-system radio frequency receiving module | |
| CN108233954A (en) | For mixing the method and apparatus of delta-sigma and Nyquist data converter | |
| CN108123734B (en) | Attitude unstable small satellite communication device based on direction backtracking array | |
| CN102916720B (en) | Reconfigurable multi-frequency-range transceiver radio-frequency front end | |
| US20100097966A1 (en) | Concurrent dual-band receiver and communication device having same | |
| KR20070023948A (en) | Wireless transceiver supporting plurality of communication/broadcast service | |
| CN101872008A (en) | Beidou satellite navigation system receiving module | |
| Nesimoglu | A review of Software Defined Radio enabling technologies | |
| US20230170861A1 (en) | Integrated directional coupler for broadband amplifier | |
| CN115801036A (en) | 5G millimeter wave bidirectional double-frequency transceiver mechanism | |
| CN112653502B (en) | Portable terminal radio frequency channel based on frequency coordination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130417 |