CN201584965U - Satellite mobile communication portable terminal RF system - Google Patents
Satellite mobile communication portable terminal RF system Download PDFInfo
- Publication number
- CN201584965U CN201584965U CN2009203161885U CN200920316188U CN201584965U CN 201584965 U CN201584965 U CN 201584965U CN 2009203161885 U CN2009203161885 U CN 2009203161885U CN 200920316188 U CN200920316188 U CN 200920316188U CN 201584965 U CN201584965 U CN 201584965U
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- amplifier
- high linear
- linear mixer
- filter
- duplexer
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Abstract
The utility model discloses a satellite mobile communication portable terminal RF system which is characterized by including a launching channel and a receiving channel; wherein the launching channel includes a duplexer, a power amplifier, a medium filter, a buffer amplifier, a high linearity mixer, a frequency synthesizer, an amplifier, and a surface acoustic wave filter, the receiving channel includes a duplexer, a LNA amplifier, a medium filter, a high linearity mixer, a buffer amplifier, a SAW filter and a variable gain amplifier. The satellite mobile communication portable terminal RF system has very high receiving sensitivity, lower noise coefficients and higher antijamming capacity.
Description
Technical field
The utility model relates to the electronic communication equipment technical field, especially relates to a kind of L, S-band satellite mobile communication portable terminal radio system.
Background technology
Existing satellite mobile communication communication mainly contains: marine satellite, IRIDIUM, Globalstar and Asia cellular satellite etc.Height by track is divided into: high rail, middle rail and low rail.Native system is to adopt high rail stationary communication satellite (big-dipper satellite) to realize the technology of satellite mobile communication, and it requires radio system that very high receiving sensitivity, lower noise factor and higher antijamming capability are arranged.
The utility model content
The purpose of this utility model provides a kind of receiving sensitivity height, noise factor is low, antijamming capability is strong satellite mobile communication portable terminal radio system.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of satellite mobile communication portable terminal radio system, comprise transmission channel and receive path, wherein,
Transmission channel comprises duplexer, power amplifier, dielectric filter, buffer amplifier, high linear mixer, frequency synthesizer, amplifier, SAW (Surface Acoustic Wave) filter, SAW (Surface Acoustic Wave) filter is connected with amplifier, amplifier is connected with high linear mixer respectively with frequency synthesizer, and high linear mixer is connected with duplexer through buffer amplifier, dielectric filter, power amplifier;
Receive path comprises duplexer, LNA amplifier, dielectric filter, high linear mixer, buffer amplifier, SAW filter, variable gain amplifier, duplexer is connected with high linear mixer with low noise amplifier through three elections switch, perhaps be connected with high linear mixer with attenuator through three elections switch, perhaps directly be connected with high linear mixer through three elections switch, high linear mixer is connected with buffer amplifier respectively with frequency synthesizer, and buffer amplifier is connected with variable gain amplifier through the SAW filter.
This communication system is to utilize apart from ground about 36000 kilometers high rail synchronous satellite to carry out the modernized mobile communication system of mobile communication.Therefore it comprises many modernized communication technologys and scientific and technological achievement, system can effectively cover the Asia-pacific region, and the whole territories of China and territorial waters can utilize this system effectively to communicate by letter, and all has crucial meaning for China outlying district and military communication.
Because native system is to utilize big-dipper satellite to communicate, in order to overcome the huge loss that bring remote route of transmission, effective transmitted power (ETRP) of user terminal must meet the demands with receiving sensitivity (G/T) and could realize effectively communicating by letter.This just requires radio system to have very high receiving sensitivity and stronger antijamming capability.The utlity model has very high receiving sensitivity and stronger antijamming capability and lower noise factor in order to reach, specialized designs radio system of the present utility model, adopt radio system of the present utility model, can effectively must realize L, S-band satellite communication.In addition, the utility model has increased three elections switch at receiving terminal, makes radio system select different circuit according to the power of signal, the final function that realizes oneself.
The beneficial effects of the utility model are: the utlity model has very high receiving sensitivity, lower noise factor and higher antijamming capability.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the circuit theory diagrams of transmission channel in the utility model;
Fig. 2 is the circuit theory diagrams of receive path in the utility model.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1 and Figure 2, a kind of satellite mobile communication portable terminal radio system comprises transmission channel and receive path, wherein,
Transmission channel comprises duplexer, power amplifier, dielectric filter, buffer amplifier, high linear mixer, frequency synthesizer, amplifier, SAW (Surface Acoustic Wave) filter, SAW (Surface Acoustic Wave) filter is connected with amplifier, amplifier is connected with high linear mixer respectively with frequency synthesizer, and high linear mixer is connected with duplexer through buffer amplifier, dielectric filter, power amplifier;
The transmitter section course of work of the present invention: as Fig. 1, the local oscillation signal mixing that is produced with frequency synthesizer 2 after through intermediate frequency filtering and variable gain amplifier from the modulated intermediate-freuqncy signal of signal processing module obtains radiofrequency signal to be sent.Entering antenna transmission by duplexer after this signal process rf filtering, driving amplification, the power amplification goes out.
Receive path comprises duplexer, the LNA amplifier, dielectric filter, high linear mixer, buffer amplifier, the SAW filter, variable gain amplifier, duplexer is connected with high linear mixer with low noise amplifier through three elections switch, perhaps be connected with high linear mixer with attenuator through three elections switch, perhaps directly be connected and (increased three elections switch at receiving terminal with high linear mixer through three elections switch, make radio system select different circuit according to the power of signal, as adopting three kinds of different circuit: 1: duplexer is connected with high linear mixer with low noise amplifier through three elections switch; 2, duplexer is connected with high linear mixer with attenuator through three elections switch; 3, duplexer directly is connected with high linear mixer through three elections switch), after above-mentioned three kinds of modes select one to connect, high linear mixer is connected with buffer amplifier respectively with frequency synthesizer again, and buffer amplifier is connected with variable gain amplifier through the SAW filter.
The receiver section course of work of the present invention: enter receive path through behind the duplexer from the radiofrequency signal of antenna input.Signal is at first amplified by the big device of low noise, to guarantee the total noise of centrifuge performance.The local oscillation signal mixing that is produced by filtered radiofrequency signal of radio-frequency filter and frequency synthesizer 1 obtains the 70MHz intermediate-freuqncy signal then, obtains stable intermediate frequency output after intermediate-freuqncy signal process intermediate-frequency filter and AGC amplifier amplify.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (1)
1. satellite mobile communication portable terminal radio system is characterized in that: comprise transmission channel and receive path, wherein,
Transmission channel comprises duplexer, power amplifier, dielectric filter, buffer amplifier, high linear mixer, frequency synthesizer, amplifier, SAW (Surface Acoustic Wave) filter, SAW (Surface Acoustic Wave) filter is connected with amplifier, amplifier is connected with high linear mixer respectively with frequency synthesizer, and high linear mixer is connected with duplexer through buffer amplifier, dielectric filter, power amplifier;
Receive path comprises duplexer, LNA amplifier, dielectric filter, high linear mixer, buffer amplifier, SAW filter, variable gain amplifier, duplexer is connected with high linear mixer with low noise amplifier through three elections switch, perhaps be connected with high linear mixer with attenuator through three elections switch, perhaps directly be connected with high linear mixer through three elections switch, high linear mixer is connected with buffer amplifier respectively with frequency synthesizer, and buffer amplifier is connected with variable gain amplifier through the SAW filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203161885U CN201584965U (en) | 2009-11-30 | 2009-11-30 | Satellite mobile communication portable terminal RF system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203161885U CN201584965U (en) | 2009-11-30 | 2009-11-30 | Satellite mobile communication portable terminal RF system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584965U true CN201584965U (en) | 2010-09-15 |
Family
ID=42726979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203161885U Expired - Fee Related CN201584965U (en) | 2009-11-30 | 2009-11-30 | Satellite mobile communication portable terminal RF system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584965U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217184A (en) * | 2014-04-18 | 2014-12-17 | 天津工业大学 | Novel UHF (Ultra High Frequency) RFID (Radio Frequency Identification Device) reader transmitter |
-
2009
- 2009-11-30 CN CN2009203161885U patent/CN201584965U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217184A (en) * | 2014-04-18 | 2014-12-17 | 天津工业大学 | Novel UHF (Ultra High Frequency) RFID (Radio Frequency Identification Device) reader transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20160113 Granted publication date: 20100915 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20160713 Granted publication date: 20100915 |
|
| RINS | Preservation of patent right or utility model and its discharge | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20151130 |
|
| EXPY | Termination of patent right or utility model |