CN206099942U - Quick frequency hopping frequency synthesizer of C wave band - Google Patents
Quick frequency hopping frequency synthesizer of C wave band Download PDFInfo
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- CN206099942U CN206099942U CN201621048474.4U CN201621048474U CN206099942U CN 206099942 U CN206099942 U CN 206099942U CN 201621048474 U CN201621048474 U CN 201621048474U CN 206099942 U CN206099942 U CN 206099942U
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Abstract
The utility model discloses a quick frequency hopping frequency synthesizer of C wave band, including dividing comb line that the ware connect to take place module and DDS module with the merit respectively, the mixing module be connected with comb line emergence module and DDS module respectively, the filter module who is connected with the mixing module, the mixing module of being connected with filter module to reach the enlarged module of being connected with the mixing module. This frequency synthesizer has adopted the mixed frequency synthesis mode that direct frequency synthesis and direct digital frequency synthesis combined together, direct frequency synthesis mode output signal phase noise is low, nevertheless frequency stepping is big, direct digital frequency synthesis mode output signal frequency hopping is fast, nevertheless output frequence is low, and it is narrow to export the frequency band, the mode that this scheme adopted two frequency synthetic method to combine together realizes, learn from other's strong points to offset one's weaknesses, it is low to make output signal phase noise, fast and the working frequency band of frequency hopping, frequency of operation is high.
Description
Technical field
The utility model is related to a kind of C-band fast frequency hopping synthesizer.
Background technology
Frequency source is the important component part of modern large scale electronic equipment, has very important decision to the performance of system
Effect.According to the difference of synthetic method, frequency synthesizer can be divided mainly into direct synthesizer（DS）, frequency synthesizer of phase locking
（PLL）And Direct Digital Frequency Synthesizers（DDS）Three kinds, respectively there are pluses and minuses in performance, benefit well can be realized each other
Fill.
The output frequency switch speed of Direct frequency synthesizer is fast, and noise is low；But circuit structure is complicated, volume is big, cost
Height, debugging is difficult, and because Direct Digital Frequency Synthesizer Technology adopts substantial amounts of frequency transformation device, so introducing many non-thread
Property is spuious, it is difficult to realize good spuious index.
Frequency synthesizer of phase locking application feedback principle, due to the effect of loop, phase noise, spuious level can be done
Very well, it is suitable for application scenario not high to frequency error factor speed and higher to phase noise and spuious requirement.
Direct Digital Frequency Synthesizers, the numeric structure of employing, this makes DDS low with mutually making an uproar, and frequency error factor speed is fast, point
The very high advantage of resolution, the small volume of DDS in addition, low in energy consumption is also its strong point.But make it due to due to circuit structure
Output signal is spuious a lot, and output frequency is not high.
Utility model content
The purpose of this utility model is to provide a kind of C-band fast frequency hopping synthesizer, and the synthesizer has frequency hopping speed
The low advantage of fast, the spuious little, phase noise of degree.
To solve above-mentioned technical problem, the utility model provides a kind of C-band fast frequency hopping synthesizer, including difference
There is module and DDS module in the comb line connect with power splitter, respectively the frequency mixing module that module and DDS module are connected occurs with comb line,
The filtration module being connected with frequency mixing module, the frequency mixing module being connected with filtration module, and the amplification mould being connected with frequency mixing module
Block.
Further, comb line and the comb line generator that module includes being connected with the first output end of power splitter, Yi Jiyu occur
The first switch wave filter of comb line generator connection.
Further, DDS module includes being connected PLL with the second output end of power splitter, and is connected to PLL and mixing mould
DDS between block.
Further, filtration module is second switch wave filter.
The beneficial effects of the utility model are：
1st, this frequency synthesizer employs hybrid frequency of the Direct frequency synthesizer in combination with direct digital synthesis technique and closes
Into mode, Direct frequency synthesizer mode phase of output signal noise is low, but frequency step is big, and direct digital synthesis technique mode is defeated
Go out signal frequency hopping speed fast, but output frequency is low, and output band is narrow, this programme is combined using two kinds of frequency synthesis modes
Mode is learnt from other's strong points to offset one's weaknesses realizing, makes that phase of output signal noise is low, frequency hopping speed is fast and working band width, operating frequency are high.
2nd, this frequency synthesizer employs state-of-the-art DDS frequency synthesizers, compared to traditional DDS frequency synthesizers,
Arranged by reasonable selection input and output frequency and DAC so that the spurious performance of the module is very good, miscellaneous in selected frequency range
Scattered suppression can accomplish more than 80dBc, and this is that general DDS frequency synthesizers are difficult to realize, and the frequency synthesizer volume
It is little, it is easy to integrated；The DDS frequency synthesizers have the fireballing feature of frequency hopping, and its Hopping time has reached advanced international level.
3rd, all parts in the application are 50 ohm of standardized module using input, output-resistor, accord with completely
The design requirement of electromagnetic compatibility is closed, cavity strictly divides chamber, it is to avoid digital-to-analogue crosstalk, the final spuious index for ensureing component reaches advanced
Level.
4th, all parts and circuit in the application are based on advanced Microsystems Design theory and microwave assembly technology is carried out
Production assembling, extensively using new technologies and methods（Multifunction chip, MCM, LTCC, multiplayer microwave printed circuit, novel encapsulated material
Deng）, integration density is obviously improved, and circuit size is substantially reduced, with spies such as small volume, stable performance, indicator consilience height
Point, while matching with good input and output, is adapted to mass production, and production cost is greatly reduced, it is adaptable to radar, electronics
In all kinds of microwave systems such as antagonism, satellite communication.
Description of the drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Specific embodiment
Specific embodiment of the present utility model is described below, in order to those skilled in the art's understanding
The utility model, it should be apparent that the utility model is not limited to the scope of specific embodiment, the common skill to the art
For art personnel, as long as various change is in the spirit and scope of the present utility model of appended claim restriction and determination,
These changes are it will be apparent that all utilize the innovation and creation of the utility model design in the row of protection.
C-band fast frequency hopping synthesizer as shown in Figure 1, including the comb line that connects with power splitter respectively occur module and
DDS module, the frequency mixing module being connected with comb line generation module and DDS module respectively, the filtration module being connected with frequency mixing module, with
The frequency mixing module of filtration module connection, and the amplification module being connected with frequency mixing module.
Wherein, combing line module occurs includes the comb line generator that be connected with the first output end of power splitter, and with comb line
The first switch wave filter of generator connection, the feature with Low phase noise and low spurious.DDS module includes second with power splitter
Output end connects PLL, and the DDS being connected between PLL and frequency mixing module；Filtration module is second switch wave filter.
Operation principle of the present utility model is：Reference signal respectively module occurs to comb line from power splitter and DDS module is sent out
The number of delivering letters；There is module by comb line and produce multiple independent Low phase noise frequencies as mixing local oscillation signal（LO）, DDS module generation
Intermediate-freuqncy signal of the fast frequency-hopped signal of low-frequency range as mixing（IF）；Frequency mixing module will be combed line and the local oscillation signal that module is produced occur
（LO）The intermediate-freuqncy signal produced with DDS module（IF）It is mixed, realizes the extension of frequency spectrum and move, its output signal is as low
Mutually make an uproar, fast frequency-hopped signal；Filtration module is filtered the output signal of frequency mixing module, filters the intermodulation letter of frequency mixer
Number, filtration module output signal is carried out frequency spectrum shift by times frequency module, and signal frequency is finally expanded to C-band, amplification module
Signal power after frequency multiplication is amplified and adjusts the power of signal, adjust the power flatness in whole frequency band.
Spectrum analyzer E4447, the oscillograph DHD3203 produced with Agilent companies is fast to the utility model C-band
Fast Frequency Hopping Synthesizer is tested, and test result is shown in Table 1：
Table 1
Claims (4)
1. a kind of C-band fast frequency hopping synthesizer, it is characterised in that module occurs including the comb line for connecing with power splitter respectively
And DDS module, there is the frequency mixing module that module and DDS module are connected with the comb line respectively, it is connected with the frequency mixing module
Filtration module, the frequency mixing module being connected with the filtration module, and the amplification module being connected with the frequency mixing module.
2. C-band fast frequency hopping synthesizer according to claim 1, it is characterised in that the comb line occurs module
Including the comb line generator that the first output end with the power splitter is connected, and first be connected with the comb line generator opens
Close wave filter.
3. C-band fast frequency hopping synthesizer according to claim 1, it is characterised in that the DDS module include with
The second output end connection PLL of the power splitter, and the DDS being connected between PLL and frequency mixing module.
4. C-band fast frequency hopping synthesizer according to claim 1, it is characterised in that the filtration module is the
Two switch filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048474.4U CN206099942U (en) | 2016-09-12 | 2016-09-12 | Quick frequency hopping frequency synthesizer of C wave band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621048474.4U CN206099942U (en) | 2016-09-12 | 2016-09-12 | Quick frequency hopping frequency synthesizer of C wave band |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995251A (en) * | 2019-12-04 | 2020-04-10 | 山东浪潮人工智能研究院有限公司 | Frequency hopping source for reducing frequency changing time and using method thereof |
| CN113452410A (en) * | 2020-03-25 | 2021-09-28 | 北京振兴计量测试研究所 | Frequency hopping broadband channel frequency synthesizer and frequency synthesis method |
| CN114884468A (en) * | 2022-03-30 | 2022-08-09 | 成都西科微波通讯有限公司 | Millimeter wave fast broadband frequency synthesis circuit and implementation method thereof |
-
2016
- 2016-09-12 CN CN201621048474.4U patent/CN206099942U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995251A (en) * | 2019-12-04 | 2020-04-10 | 山东浪潮人工智能研究院有限公司 | Frequency hopping source for reducing frequency changing time and using method thereof |
| CN110995251B (en) * | 2019-12-04 | 2023-12-08 | 山东浪潮科学研究院有限公司 | Frequency hopping source capable of reducing frequency changing time and application method thereof |
| CN113452410A (en) * | 2020-03-25 | 2021-09-28 | 北京振兴计量测试研究所 | Frequency hopping broadband channel frequency synthesizer and frequency synthesis method |
| CN113452410B (en) * | 2020-03-25 | 2022-06-14 | 北京振兴计量测试研究所 | Frequency hopping broadband channel frequency synthesizer and frequency synthesis method |
| CN114884468A (en) * | 2022-03-30 | 2022-08-09 | 成都西科微波通讯有限公司 | Millimeter wave fast broadband frequency synthesis circuit and implementation method thereof |
| CN114884468B (en) * | 2022-03-30 | 2023-02-14 | 成都西科微波通讯有限公司 | Millimeter wave fast broadband frequency synthesis circuit and implementation method thereof |
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