CN102255604A - Frequency conversion transmitter for multipath signals - Google Patents
Frequency conversion transmitter for multipath signals Download PDFInfo
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- CN102255604A CN102255604A CN201110137197XA CN201110137197A CN102255604A CN 102255604 A CN102255604 A CN 102255604A CN 201110137197X A CN201110137197X A CN 201110137197XA CN 201110137197 A CN201110137197 A CN 201110137197A CN 102255604 A CN102255604 A CN 102255604A
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Abstract
The invention belongs to an electronic circuit and especially relates to a frequency changer circuit used in a satellite communication system of a Ku frequency range. The invention provides a frequency conversion transmitter for multipath signals. On the basis of a present single conversion transmitter, the frequency conversion transmitter for multipath signals provided in the invention is characterized in that a first local oscillator frequency source (LO1) comprises a phase-locked loop chip (D1), a first low pass filter (D2), a second first low pass filter (D4), a VCO voltage controlled oscillator (D3), a seventh amplifier (A7) and an eighth amplifier (A2). According to the application of the invention, when a plurality of transmitters of wireless image transmission systems are used as signal sources, a control word of the phase-locked loop chip (D1) is rewritten in different time periods by software, so that frequencies of output signals of the first local oscillator frequency source (LO1) are changed; different frequencies are distributed to different signal sources, so that a problem that a satellite mobile communication system collects and transmits multipath information is solved.
Description
Technical field
The invention belongs to a kind of electronic circuit, particularly a kind of frequency changer circuit that is used in Ku frequency range satellite communication system.
Background technology
The application number that applicant was submitted on May 24th, 2011 is that the Chinese invention patent application of 201110133918.X discloses a kind of signal frequency conversion transmitter as shown in Figure 1, this invention receives the wireless signal of wireless image transmission system transmitter with 345 ± 10MHz frequency transmission image, voice, after being converted to 950～1450MHz, by known former upconverter, export paramount power amplifier, send to satellite, thereby solved the problem that remote terminal in the existing satellite mobile communication can not remote capture transmission information.But this invention can only the transmission of one line signal, and can not satisfy the needs of some occasion multiple spot position, multi-angle collection and real-time Transmission image, voice signal.
Summary of the invention
The objective of the invention is: a kind of multiple signals frequency conversion transmitter is provided, it can receive the continuous image transmitted of multi-section wireless image transmission system transmitter, voice wireless signal, and send upconverter to, thereby satisfy the needs that existing satellite mobile communication system is gathered transmitting multiplex information.
Technical scheme of the present invention is: a kind of multiple signals frequency conversion transmitter, and it comprises: first filter, second filter, the 3rd filter, the 4th filter, the 5th filter, the 6th filter, first amplifier, second amplifier, the 3rd amplifier, the 4th amplifier, first variable gain amplifier, second variable gain amplifier, first frequency mixer, second frequency mixer, three-mixer, low pass filter, the first local frequency source, the second local frequency source, the 3rd local frequency source, attenuator, it is characterized in that: the described first local frequency source comprises: phase-locked loop chip, first low pass filter, second low pass filter, VCO voltage controlled oscillator, the 7th amplifier, the 8th amplifier;
Described VCO voltage controlled oscillator is under input control voltage control, and output frequency changes in 405MHz～425MHz scope;
Described the 7th amplifier amplifies the output of described VCO voltage controlled oscillator, and exports to described phase-locked loop chip;
It is phase-locked that described phase-locked loop chip carries out frequency division to the output signal of described the 7th amplifier and 10MHz internal reference frequency signal, and its frequency dividing ratio is determined by the control word of input, and the generation output voltage corresponding with described control word;
High fdrequency component in the described phase-locked loop chip output voltage of described first low pass filter filters out, and as the input control voltage to described VCO voltage controlled oscillator;
Described the 8th amplifier amplifies the output of described VCO voltage controlled oscillator;
Described second low pass filter cutoff frequency is 450MHz, and it carries out High frequency filter to the output of described the 8th amplifier, forms the output signal in the described first local frequency source.
Use the present invention, can be when multi-section wireless image transmission system transmitter be arranged as signal source, rewrite the control word of described phase-locked loop chip at times by software, thereby change the output signal frequency in the described first local frequency source, give different signal sources with different Frequency Distribution, thereby solve the problem that satellite mobile communication system is gathered transmitting multiplex information.
Description of drawings
Accompanying drawing 1 is the structured flowchart as the signal frequency conversion transmitter of background technology of the present invention;
Accompanying drawing 2 is the structured flowchart in the first local frequency source among the present invention.
Embodiment
Referring to accompanying drawing, a kind of multiple signals frequency conversion transmitter, it comprises: the first filter BPF1, the second filter BPF2, the 3rd filter BPF3, the 4th filter BPF4, the 5th filter BPF5, the 6th filter BPF6, the first amplifier A1, the second amplifier A2, the 3rd amplifier A3, the 4th amplifier A6, the first variable gain amplifier A4, the second variable gain amplifier A5, the first frequency mixer MIXER1, the second frequency mixer MIXER2, three-mixer MIXER3, low pass filter LPF1, the first local frequency source LO1, the second local frequency source LO2, the 3rd local frequency source LO3, attenuator ATT1 is characterized in that: the described first local frequency source LO1 comprises: phase-locked loop chip D1, the first low pass filter D2, the second low pass filter D4, VCO voltage controlled oscillator D3, the 7th amplifier A7, the 8th amplifier A2;
Described VCO voltage controlled oscillator D3 is under input control voltage control, and output frequency changes in 405MHz～425MHz scope;
Described the 7th amplifier A7 amplifies the output of described VCO voltage controlled oscillator D3, and exports to described phase-locked loop chip D1;
It is phase-locked that described phase-locked loop chip D1 carries out frequency division to the output signal of described the 7th amplifier A7 and 10MHz internal reference frequency signal, and its frequency dividing ratio is determined by the control word of input, and the generation output voltage corresponding with described control word;
High fdrequency component in the described phase-locked loop chip D1 of the described first low pass filter D2 filtering output voltage, and as the input control voltage to described VCO voltage controlled oscillator D3;
Described the 8th amplifier A2 amplifies the output of described VCO voltage controlled oscillator D3;
The described second low pass filter D4 cut-off frequency is 450MHz, and it carries out High frequency filter to the output of described the 8th amplifier A2, forms the output signal of the described first local frequency source LO1.
Claims (1)
1. multiple signals frequency conversion transmitter, it comprises: first filter (BPF1), second filter (BPF2), the 3rd filter (BPF3), the 4th filter (BPF4), the 5th filter (BPF5), the 6th filter (BPF6), first amplifier (A1), second amplifier (A2), the 3rd amplifier (A3), the 4th amplifier (A6), first variable gain amplifier (A4), second variable gain amplifier (A5), first frequency mixer (MIXER1), second frequency mixer (MIXER2), three-mixer (MIXER3), low pass filter (LPF1), the first local frequency source (LO1), the second local frequency source (LO2), the 3rd local frequency source (LO3), attenuator (ATT1), it is characterized in that: the described first local frequency source (LO1) comprising: phase-locked loop chip (D1), first low pass filter (D2), second low pass filter (D4), VCO voltage controlled oscillator (D3), the 7th amplifier (A7), the 8th amplifier (A2);
Described VCO voltage controlled oscillator (D3) is under input control voltage control, and output frequency changes in 405MHz～425MHz scope;
Described the 7th amplifier (A7) amplifies the output of described VCO voltage controlled oscillator (D3), and exports to described phase-locked loop chip (D1);
It is phase-locked that described phase-locked loop chip (D1) carries out frequency division to the output signal of described the 7th amplifier (A7) and 10MHz internal reference frequency signal, and its frequency dividing ratio is determined by the control word of input, and the generation output voltage corresponding with described control word;
High fdrequency component in the described phase-locked loop chip of described first low pass filter (D2) filtering (D1) output voltage, and as the input control voltage to described VCO voltage controlled oscillator (D3);
Described the 8th amplifier (A2) amplifies the output of described VCO voltage controlled oscillator (D3);
Described second low pass filter (D4) cut-off frequency is 450MHz, and it carries out High frequency filter to the output of described the 8th amplifier (A2), forms the output signal in the described first local frequency source (LO1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137197XA CN102255604A (en) | 2011-05-26 | 2011-05-26 | Frequency conversion transmitter for multipath signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137197XA CN102255604A (en) | 2011-05-26 | 2011-05-26 | Frequency conversion transmitter for multipath signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102255604A true CN102255604A (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110137197XA Pending CN102255604A (en) | 2011-05-26 | 2011-05-26 | Frequency conversion transmitter for multipath signals |
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| CN (1) | CN102255604A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497207A (en) * | 2011-11-25 | 2012-06-13 | 广州易茂科技发展有限公司 | Multipath high-precision low frequency difference clock source |
| CN112769432A (en) * | 2020-12-30 | 2021-05-07 | 航天恒星科技有限公司 | Method and generator for generating 10MHz frequency scale of relay satellite SMA downlink signal without pilot frequency |
| CN115473558A (en) * | 2021-06-11 | 2022-12-13 | 海能达通信股份有限公司 | Signal transfer circuit, method and electronic equipment |
-
2011
- 2011-05-26 CN CN201110137197XA patent/CN102255604A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497207A (en) * | 2011-11-25 | 2012-06-13 | 广州易茂科技发展有限公司 | Multipath high-precision low frequency difference clock source |
| CN112769432A (en) * | 2020-12-30 | 2021-05-07 | 航天恒星科技有限公司 | Method and generator for generating 10MHz frequency scale of relay satellite SMA downlink signal without pilot frequency |
| CN112769432B (en) * | 2020-12-30 | 2022-08-12 | 航天恒星科技有限公司 | Method and generator for generating 10MHz frequency scale of relay satellite SMA downlink signal without pilot frequency |
| CN115473558A (en) * | 2021-06-11 | 2022-12-13 | 海能达通信股份有限公司 | Signal transfer circuit, method and electronic equipment |
| CN115473558B (en) * | 2021-06-11 | 2023-07-18 | 海能达通信股份有限公司 | Signal transfer circuit, signal transfer method and electronic equipment |
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Application publication date: 20111123 |