CN204168289U - Anti-interference hand-held dual-mode radio frequency device - Google Patents
Anti-interference hand-held dual-mode radio frequency device Download PDFInfo
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- CN204168289U CN204168289U CN201420568899.2U CN201420568899U CN204168289U CN 204168289 U CN204168289 U CN 204168289U CN 201420568899 U CN201420568899 U CN 201420568899U CN 204168289 U CN204168289 U CN 204168289U
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- voltage
- controlled attenuator
- detector
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Abstract
The utility model discloses a kind of anti-interference hand-held dual-mode radio frequency device, comprise S, L passage and B3 passage, wherein, S, L passage comprises the S-band LNA module, the S that connect successively, L-band frequency-variable module and L-band power amplifier module; B3 passage comprises the B3 LNA module and B3 wave band down conversion module that connect successively.The utility model structure is simple, volume is little, and antijamming capability is strong.
Description
Technical field
The utility model relates to the communications field, particularly relates to a kind of anti-interference hand-held dual-mode radio frequency device on handheld terminal subscriber computer.
Background technology
Beidou satellite navigation system is the autonomous construction of China, independent operating, and the GPS (Global Position System) shared with other satellite navigation system compatibilities of the world, it is at L, S frequency range broadcasts navigation signals, upload and use L frequency range, frequency is 1610-1626.5MHz, under pass and then use S frequency range, frequency is 2483.5-2500MHz; B1, B2 and B3 tri-frequencies of L frequency range launch open and authorization service signal.
Beidou user terminal device is by the receive and send messages function that realize locate, navigate interactively with satellite, and the anti-interference hand-held dual-mode radio frequency device on handheld terminal subscriber computer mainly comprises frequency-variable module, LNA module and power amplifier module; The principle of receiving and transmitting signal be by the down conversion module in frequency-variable module by radiofrequency signal after double conversion, be transferred to master controller after becoming the lower intermediate-freuqncy signal of frequency ratio and carry out analyzing and processing; Signal is treated to after baseband signal through master controller, and modulates baseband signals on transmitting carrier wave, is gone out by antenna transmission by the up-converter module in frequency-variable module after power amplifier amplifies.The liftoff ball of satellite of Beidou satellite navigation system is far, satellite-signal is very faint, there is the shortcoming be easily disturbed, application number is: power amplifier module, LNA module and frequency-variable module are separately positioned on by the patent of 201120195796.2 to be had interlayer and arrange in two cavitys, and radome is set on frequency-variable module, reduce volume with physical means and reduce interference.But because the large area of cordless communication network covers, LTE, the S-band receiving path of hot spot region signal to the Big Dipper of the high strength of the adjacent channels such as Wifi creates the interference being difficult to filtering, be not only the prime LNA part of hand-held dual-mode radio frequency device, the frequency conversion part of rear class is also very easily saturated, even burn, the effect reducing interference by means of only physical means is very limited.
Utility model content
The purpose of this utility model is, provides a kind of anti-interference hand-held dual-mode radio frequency device, to optimize volume and the interference free performance of existing anti-interference hand-held dual-mode radio frequency device.
The utility model discloses a kind of anti-interference hand-held dual-mode radio frequency device, comprise S, L passage and B3 passage, wherein, S, L passage comprises the S-band LNA module, the S that connect successively, L-band frequency-variable module and L-band power amplifier module; B3 passage comprises the B3 LNA module and B3 wave band down conversion module that connect successively; Above-mentioned
S, L-band frequency-variable module comprise the first voltage-controlled attenuator, first detector, the first electric pressure converter and S, L-band frequency conversion transceiver; Wherein, the output of above-mentioned first voltage-controlled attenuator and above-mentioned first detector and S, the input of L-band frequency conversion transceiver connects; The output of above-mentioned first detector is connected with the input of above-mentioned first electric pressure converter, and the output of above-mentioned first electric pressure converter is connected with the control end of above-mentioned first voltage-controlled attenuator;
B3 wave band down conversion module comprises the second voltage-controlled attenuator, second detector, the second electric pressure converter and B3 wave band down-conversion receiver; Wherein, the output of above-mentioned second voltage-controlled attenuator is connected with the input of above-mentioned second detector and above-mentioned B3 wave band down-conversion receiver; The output of above-mentioned second detector is connected with the input of above-mentioned second electric pressure converter, and the output of above-mentioned second electric pressure converter is connected with the control end of above-mentioned second voltage-controlled attenuator.
Preferably, above-mentioned first electric pressure converter and above-mentioned second electric pressure converter all adopt STM8S003 single-chip microcomputer.
Preferably, above-mentioned first detector and above-mentioned second detector all adopt LT5534 chip.
Preferably, above-mentioned first voltage-controlled attenuator and above-mentioned second voltage-controlled attenuator all adopt ALM-38140 chip.
Preferably, above-mentioned first voltage-controlled attenuator and above-mentioned second voltage-controlled attenuator all adopt ALM-38140 chip.
The utility model structure is simple, volume is little, and antijamming capability is strong.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a part of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the theory diagram of anti-interference hand-held dual-mode radio frequency device preferred embodiment described in the utility model.
Embodiment
In order to make technical problem to be solved in the utility model, technical scheme and beneficial effect clearly, understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, be the theory diagram of anti-interference hand-held dual-mode radio frequency device preferred embodiment described in the utility model; Comprise S, L passage and B3 passage, wherein, S, L passage comprises the S-band LNA module 10, the S that connect successively, L-band frequency-variable module 20 and L-band power amplifier module 30; B3 passage comprises the B3 LNA module 40 and B3 wave band down conversion module 50 that connect successively;
S, L-band frequency-variable module 20 comprise the first voltage-controlled attenuator 21, first detector 22, first electric pressure converter 23 and S, L-band frequency conversion transceiver 24; Wherein, the output of the first voltage-controlled attenuator 21 and first detector 22 and S, the input of L-band frequency conversion transceiver 24 connects; The output of first detector 22 is connected with the input of the first electric pressure converter 23, and the output of described first electric pressure converter 23 is connected with the control end of the first voltage-controlled attenuator 21;
B3 wave band down conversion module 50 comprises the second voltage-controlled attenuator 51, second detector 52, second electric pressure converter 53 and B3 wave band down-conversion receiver 54; Wherein, the output of the second voltage-controlled attenuator 51 is connected with the input of second detector 52 and B3 wave band down-conversion receiver 54; The output of second detector 52 is connected with the input of the second electric pressure converter 53, and the output of the second electric pressure converter 53 is connected with the control end of the second voltage-controlled attenuator 51.
In the present embodiment, described first voltage-controlled attenuator 21 and the second voltage-controlled attenuator 51 all adopt ALM-38140 chip; First detector 22 and second detector 52 all adopt LT5534 chip; First electric pressure converter 23 and described second electric pressure converter 53 all adopt STM8S003 single-chip microcomputer.Voltage after wave detector LT5534 detection gives single-chip microcomputer STM8S003, the voltage-controlled attenuator ALM-38140 that corresponding control voltage controls prime is exported by single-chip microcomputer, realize decay, if signal power is too high, decay will be increased, ensure that the signal being input to down-conversion chip is not higher than-40dBm, under normal circumstances, the amplitude of interference signal is after prime is amplified, generally about-20dBm, voltage-controlled attenuator ALM-38140 is the maximum 40dB that decays usually, and the incoming signal level of down-conversion chip is in safe range to have enough surpluses to ensure; When equipment have left interference region, then wave detector LT5534 detects that signal power is more weak, and ALM-38140 is unattenuated for now single-chip microcomputer STM8S003 control voltage-controlled attenuator, and hand-held dual-mode radio frequency device recovers normal operating state.The utility model is applied in field of Beidou navigation, and volume can be reduced to 53mm × 38mm × 13mm, has that structure is simple, volume is little, the advantage that antijamming capability is strong.
In other embodiments, can be that only voltage-controlled attenuator adopts ALM-38140 chip, wave detector, electric pressure converter adopt other chips; Or wave detector adopts LT5534 chip, and voltage-controlled attenuator, electric pressure converter adopt other chips, or electric pressure converter STM8S003 single-chip microcomputer, and voltage-controlled attenuator, wave detector adopt other chips; Or wherein two combinationally use chip listed by the utility model, can combinationally use according to embody rule scene unrestricted choice.
Above-mentioned explanation illustrate and describes preferred embodiment of the present utility model, but as previously mentioned, be to be understood that the utility model is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in utility model contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from spirit and scope of the present utility model, then all should in the protection range of the utility model claims.
Claims (5)
1. an anti-interference hand-held dual-mode radio frequency device, comprises S, L passage and B3 passage, and wherein, S, L passage comprises the S-band LNA module, the S that connect successively, L-band frequency-variable module and L-band power amplifier module; B3 passage comprises the B3 LNA module and B3 wave band down conversion module that connect successively; It is characterized in that, described in
S, L-band frequency-variable module comprise the first voltage-controlled attenuator, first detector, the first electric pressure converter and S, L-band frequency conversion transceiver; Wherein, the output of described first voltage-controlled attenuator and described first detector and S, the input of L-band frequency conversion transceiver connects; The output of described first detector is connected with the input of described first electric pressure converter, and the output of described first electric pressure converter is connected with the control end of described first voltage-controlled attenuator;
B3 wave band down conversion module comprises the second voltage-controlled attenuator, second detector, the second electric pressure converter and B3 wave band down-conversion receiver; Wherein, the output of described second voltage-controlled attenuator is connected with the input of described second detector and described B3 wave band down-conversion receiver; The output of described second detector is connected with the input of described second electric pressure converter, and the output of described second electric pressure converter is connected with the control end of described second voltage-controlled attenuator.
2. anti-interference hand-held dual-mode radio frequency device as claimed in claim 1, is characterized in that, described first electric pressure converter and described second electric pressure converter all adopt STM8S003 single-chip microcomputer.
3. anti-interference hand-held dual-mode radio frequency device as claimed in claim 1 or 2, it is characterized in that, described first detector and described second detector all adopt LT5534 chip.
4. anti-interference hand-held dual-mode radio frequency device as claimed in claim 1 or 2, is characterized in that, described first voltage-controlled attenuator and described second voltage-controlled attenuator all adopt ALM-38140 chip.
5. anti-interference hand-held dual-mode radio frequency device as claimed in claim 3, is characterized in that, described first voltage-controlled attenuator and described second voltage-controlled attenuator all adopt ALM-38140 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568899.2U CN204168289U (en) | 2014-09-29 | 2014-09-29 | Anti-interference hand-held dual-mode radio frequency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420568899.2U CN204168289U (en) | 2014-09-29 | 2014-09-29 | Anti-interference hand-held dual-mode radio frequency device |
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| Publication Number | Publication Date |
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| CN204168289U true CN204168289U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420568899.2U Expired - Fee Related CN204168289U (en) | 2014-09-29 | 2014-09-29 | Anti-interference hand-held dual-mode radio frequency device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600573A (en) * | 2020-11-10 | 2021-04-02 | 北京遥测技术研究所 | L or S frequency band can dispose miniaturized multichannel high power digital transmitting component |
-
2014
- 2014-09-29 CN CN201420568899.2U patent/CN204168289U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600573A (en) * | 2020-11-10 | 2021-04-02 | 北京遥测技术研究所 | L or S frequency band can dispose miniaturized multichannel high power digital transmitting component |
| CN112600573B (en) * | 2020-11-10 | 2022-05-06 | 北京遥测技术研究所 | L or S frequency band can dispose miniaturized multichannel high power digital transmitting component |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20200929 |