CN202268869U - 1030 M frequency synthesizer - Google Patents
1030 M frequency synthesizer Download PDFInfo
- Publication number
- CN202268869U CN202268869U CN2011203949068U CN201120394906U CN202268869U CN 202268869 U CN202268869 U CN 202268869U CN 2011203949068 U CN2011203949068 U CN 2011203949068U CN 201120394906 U CN201120394906 U CN 201120394906U CN 202268869 U CN202268869 U CN 202268869U
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- CN
- China
- Prior art keywords
- frequency synthesizer
- low
- controlled oscillator
- pll
- frequency
- 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 - Lifetime
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Abstract
The utility model relates to a 1030 M frequency synthesizer used as a local oscillator signal for an ABS-B system. The frequency synthesizer includes a single chip microprocessor MCU (Micro-programmed Control Unit), a crystal oscillator, a PLL frequency synthesizer, a low-pass filter, a voltage-controlled oscillator, a low-noise amplifier and a frequency divider. The single chip microprocessor MCU connects with the low-pass filter, the voltage-controlled oscillator and the low-noise amplifier through the PLL frequency synthesizer. The voltage-controlled oscillator connects with the PLL frequency synthesizer through the frequency divider. The crystal oscillator connects with the PLL frequency synthesizer. The 1030 M frequency synthesizer in the utility model meets systematic design requirements and has characteristics of high frequency stability and low phase noise.
Description
Technical field
The utility model relates to the 1030M frequency synthesizer that a kind of ABS-B of being used for systemic effect local oscillation signal uses.
Background technology
Handle after need being mixed down intermediate-freuqncy signal behind the ABS-B system reception signal, this frequency synthesizer is used for the ABS-B system as local oscillation signal again.
Summary of the invention
In view of the demand of ABS-B system, the utility model provides a kind of 1030M frequency synthesizer.Adopt the PLL frequency synthesis technique, accomplish circuit design through phase-locked loop, low pass filter, voltage controlled oscillator, frequency divider, low noise amplifier.
The utility model is for realizing above-mentioned purpose; The technical scheme of being taked is: a kind of 1030M frequency synthesizer; It is characterized in that: said frequency synthesizer circuit comprises single-chip microprocessor MCU, crystal oscillator, PLL frequency synthesizer, low pass filter, voltage controlled oscillator, low noise amplifier, frequency divider; Said single-chip microprocessor MCU is connected with low pass filter, voltage controlled oscillator, low noise amplifier through the PLL frequency synthesizer successively; Said voltage controlled oscillator is connected with the PLL frequency synthesizer through frequency divider, and said crystal oscillator is connected with the PLL frequency synthesizer.
The characteristics of the utility model are: satisfy requirement of system design, frequency stability is high, and phase noise is low.
Description of drawings
Fig. 1 is that the circuit of the utility model connects block diagram.
Embodiment
As shown in Figure 1; The 1030M frequency synthesizer; Frequency synthesizer circuit comprises single-chip microprocessor MCU, crystal oscillator, PLL frequency synthesizer, low pass filter, voltage controlled oscillator, low noise amplifier, frequency divider; Single-chip microprocessor MCU is connected with low pass filter, voltage controlled oscillator, low noise amplifier through the PLL frequency synthesizer successively, and voltage controlled oscillator is connected with the PLL frequency synthesizer through frequency divider, and crystal oscillator is connected with the PLL frequency synthesizer.
International Civil Aviation regulation ABS-B (Automatic dependent surveillance broadcast) system works frequency is 1090MHz, handles after the need mixing becomes intermediate frequency behind the ABS-B system reception signal again.
Phase-locked loop frequency synthesizer is selected MC145193 for use, and MC145193 is the special-purpose phase-locked loop chip of the 1.1GHz of MOTOROLA company production, and it can carry out frequency preset to counter easily through the PIC12C508 single-chip microcomputer; Select the compensation crystal oscillator of 10MHz for use, good temp characteristic, frequency accuracy is high; Low pass filter is selected TL071 for use; Voltage controlled oscillator is a surface mount, and volume is little, and phase noise is low; Adopt low noise amplifier, reduce noise and improve gain.
The technical indicator that this circuit reaches is following:
Operating frequency 1030MHz ± 10KHz
Output amplitude 8 ± 0.5dBm
Second harmonic≤-15dBc
Triple-frequency harmonics≤-40dBc
Phase noise at the 100KHz place≤-95dBc.
Claims (1)
1. 1030M frequency synthesizer; It is characterized in that: said frequency synthesizer circuit comprises single-chip microprocessor MCU, crystal oscillator, PLL frequency synthesizer, low pass filter, voltage controlled oscillator, low noise amplifier, frequency divider; Said single-chip microprocessor MCU is connected with low pass filter, voltage controlled oscillator, low noise amplifier through the PLL frequency synthesizer successively; Said voltage controlled oscillator is connected with the PLL frequency synthesizer through frequency divider, and said crystal oscillator is connected with the PLL frequency synthesizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203949068U CN202268869U (en) | 2011-10-17 | 2011-10-17 | 1030 M frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203949068U CN202268869U (en) | 2011-10-17 | 2011-10-17 | 1030 M frequency synthesizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268869U true CN202268869U (en) | 2012-06-06 |
Family
ID=46159650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203949068U Expired - Lifetime CN202268869U (en) | 2011-10-17 | 2011-10-17 | 1030 M frequency synthesizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268869U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660257A (en) * | 2015-03-25 | 2015-05-27 | 天津七六四通信导航技术有限公司 | L-band frequency synthesizer circuit |
| CN105245226A (en) * | 2015-11-13 | 2016-01-13 | 成都前锋电子仪器有限责任公司 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
| CN111077819A (en) * | 2019-12-06 | 2020-04-28 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
-
2011
- 2011-10-17 CN CN2011203949068U patent/CN202268869U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104660257A (en) * | 2015-03-25 | 2015-05-27 | 天津七六四通信导航技术有限公司 | L-band frequency synthesizer circuit |
| CN105245226A (en) * | 2015-11-13 | 2016-01-13 | 成都前锋电子仪器有限责任公司 | Dot frequency generation circuit for radio-frequency local oscillation circuit of radio integrated measurement instrument |
| CN111077819A (en) * | 2019-12-06 | 2020-04-28 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
| CN111077819B (en) * | 2019-12-06 | 2021-06-01 | 武汉航空仪表有限责任公司 | Frequency starting circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120606 |
|
| CX01 | Expiry of patent term |