CN202395753U - 100MHz-850MHz broadband excitation signal source - Google Patents
100MHz-850MHz broadband excitation signal source Download PDFInfo
- Publication number
- CN202395753U CN202395753U CN2011205258929U CN201120525892U CN202395753U CN 202395753 U CN202395753 U CN 202395753U CN 2011205258929 U CN2011205258929 U CN 2011205258929U CN 201120525892 U CN201120525892 U CN 201120525892U CN 202395753 U CN202395753 U CN 202395753U
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- China
- Prior art keywords
- 850mhz
- frequency device
- 100mhz
- signal source
- excitation signal
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Abstract
A 100MHz-850MHz broadband excitation signal source relates to the technical fields of electronic countermeasure devices, radar countermeasure, measuring apparatus scientific experiments and the like. The 100MHz-850MHz broadband excitation signal source comprises an AD9910 digital frequency device with 50MHz-425MHz of output frequency, the AD9910 digital frequency device is connected with a frequency multiplier circuit through a first amplifying circuit, the frequency multiplier circuit is connected with the input end of an electrically tunable filter, the electrically tunable filter is further connected with the input end of a low pass filter through a second amplifying circuit, and the AD9910 digital frequency device and the electrically tunable filter are respectively provided with controller. A crystal oscillator is further connected onto the AD9910 digital frequency device. The 100MHz-850MHz broadband excitation signal source adopts simple circuit design and has few control interfaces, and the AD9910 digital frequency device adopts four working modes, namely a single tone mode, a random-access memory (RAM) mode, a Digital RAMP AND mode and a parallel data modulation mode.
Description
Technical field
The utility model relates to technical fields such as electronic counter-measures equipment, radar countermeasures and measuring instrument scientific experiment.
Background technology
Existing antagonism equipment driving source partly adopts traditional frequency mixing technique, carries out mixing by phase-locked loop (PLL) variable local oscillator of generation and intermediate frequency, produces required frequency signal.This technology circuit is complicated, and the output frequency stability is poor, phase noise high, and especially the spurious signal of analog-modulated generation is bigger to the communication influence.
Summary of the invention
The utility model purpose is to propose a kind of 100MHz～850MHz wideband excitation signal source that can overcome the prior art defective.
The utility model comprises that output frequency is the AD9910 numerical frequency device of 50MHz～425MHz; Said AD9910 numerical frequency device is connected with frequency multiplier circuit through first amplifying circuit; Said frequency multiplier circuit is connected with the input of electrically tunable filter; Electrically tunable filter is connected with the input of low pass filter through second amplifying circuit again, on said AD9910 numerical frequency device and electrically tunable filter, controller is set respectively; On said AD9910 numerical frequency device, also connect crystal oscillator.
The utility model clock frequency reaches as high as 1GHz; The output signal frequency maximum can arrive 450MHz; Phase noise is less than-125dBc/Hz, and AD9910 also has automatic frequency, phase place and amplitude scanning and phase-modulation and amplitude-modulation, internal noise and advantage such as single-tone modulation at random simultaneously.Aspect storage capacity, AD9910 has 8 (1024 words * 32bit) frequency and phase place Profile RAM.All these is that AD9910 disturbs in logical anti-equipment fast, in programmable clock generator, radar FM source and application such as scanning system thermometrically equipment, fast frequency-hopped radio station, lays the first stone.
The exciting signal source circuit design of the utility model is simple, and control interface is few, and all functions (can realize on the 160mm * 100mm), dwindle physical dimension greatly, can save a lot of spaces than the driving source based on frequency mixing technique a printed board.AD9910 has four kinds of mode of operations: single-tone, RAM, Digital RAMP and parallel data modulating mode.
The utility model adopts the wideband excitation signal source that produces 100MHz～850MHz based on the AD9910 digital frequency synthesizer; The AD9910 output frequency need be set to 50MHz～425MHz, after passive frequency multiplier (HE011) frequency multiplication, can reach 100MHZ～850MHZ requirement.Because the AD9910 maximum clock frequency can reach 1GHz; So output 425M (fc-f0>500MHZ) be feasible, but passive frequency multiplier is a nonlinear device, after frequency multiplication, produces a lot of combination frequency components; So in order to satisfy output frequency harmonic wave and spuious requirement (> 30dBC); Must increase electrically tunable filter in frequency multiplication output back, its passband three dB bandwidth is less than 10% * f0, then the unnecessary mixed product of filtering fully.
Description of drawings
Fig. 1 is a kind of structural principle block diagram of the utility model.
Embodiment
As shown in Figure 1; The utility model is provided with the AD9910 numerical frequency device 1 that output frequency is 50MHz～425MHz; AD9910 numerical frequency device 1 is connected with frequency multiplier circuit 3 through amplifying circuit 2; Frequency multiplier circuit 3 is connected with the input of electrically tunable filter 4, and electrically tunable filter 4 is connected with the input of low pass filter 6 after amplifying circuit 5 amplifies again.
On AD9910 numerical frequency device 1 and electrically tunable filter 4, controller 7 is set respectively, on AD9910 numerical frequency device 1, also connects crystal oscillator 8.
The utility model has performances such as better frequency stability, phase noise, response speed than the exciting signal source that adopts traditional frequency mixing technique; Circuit design and structural design are all simple relatively simultaneously, also meet the performance requirement of modern communications antagonism equipment simultaneously more.
Claims (1)
1.100MHz～850MHz wideband excitation signal source; It is characterized in that comprising that output frequency is the AD9910 numerical frequency device of 50MHz～425MHz; Said AD9910 numerical frequency device is connected with frequency multiplier circuit through first amplifying circuit; Said frequency multiplier circuit is connected with the input of electrically tunable filter, and electrically tunable filter is connected with the input of low pass filter through second amplifying circuit again, on said AD9910 numerical frequency device and electrically tunable filter, controller is set respectively; On said AD9910 numerical frequency device, also connect crystal oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205258929U CN202395753U (en) | 2011-12-15 | 2011-12-15 | 100MHz-850MHz broadband excitation signal source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205258929U CN202395753U (en) | 2011-12-15 | 2011-12-15 | 100MHz-850MHz broadband excitation signal source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202395753U true CN202395753U (en) | 2012-08-22 |
Family
ID=46670652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205258929U Expired - Lifetime CN202395753U (en) | 2011-12-15 | 2011-12-15 | 100MHz-850MHz broadband excitation signal source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202395753U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306047A (en) * | 2015-10-27 | 2016-02-03 | 中国电子科技集团公司第四十一研究所 | High-performance synchronous clock reference source and synchronous clock reference generation method |
| CN109270985A (en) * | 2018-11-23 | 2019-01-25 | 天津光电通信技术有限公司 | A kind of frequency synthesizer |
-
2011
- 2011-12-15 CN CN2011205258929U patent/CN202395753U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306047A (en) * | 2015-10-27 | 2016-02-03 | 中国电子科技集团公司第四十一研究所 | High-performance synchronous clock reference source and synchronous clock reference generation method |
| CN105306047B (en) * | 2015-10-27 | 2018-08-10 | 中国电子科技集团公司第四十一研究所 | A kind of synchronised clock reference source and synchronised clock refer to production method |
| CN109270985A (en) * | 2018-11-23 | 2019-01-25 | 天津光电通信技术有限公司 | A kind of frequency synthesizer |
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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: 20120822 |
|
| CX01 | Expiry of patent term |