CN205179021U - X wave band broadband frequency synthesizer - Google Patents
X wave band broadband frequency synthesizer Download PDFInfo
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- CN205179021U CN205179021U CN201520844863.7U CN201520844863U CN205179021U CN 205179021 U CN205179021 U CN 205179021U CN 201520844863 U CN201520844863 U CN 201520844863U CN 205179021 U CN205179021 U CN 205179021U
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Abstract
The utility model discloses a X wave band broadband frequency synthesizer belongs to digital electron technical field. The utility model discloses a crystal oscillator, UHF produce circuit, doubling of frequency mixing filter circuit and merit minute isolator frequently, the signal input part that the signal output part and the UHF of crystal oscillator produced the circuit frequently links to each other, the output that UHF produced the circuit frequently links to each other with doubling of frequency mixing filter circuit's input, doubling of frequency mixing filter circuit's output and merit divide the input of isolator to link to each other. The crystal oscillator is used for producing the local oscillator signal of X wave band, and UHF produces the circuit frequently and is used for producing multichannel UHF point signal frequently, UHF produces the circuit frequently and cooperates the ultimate output frequence of common realization each other with doubling of frequency mixing filter circuit. This frequency synthesizer's output signal has good characteristics such as ultralow phase noise, high -speed frequency hopping time, low noise, can realize the fast switch over and the high -quality signal output requirement of frequency betterly.
Description
Technical field
The utility model belongs to Digital Electronic Technique field, particularly a kind of X-band broadband frequency synthesizer.
Background technology
Along with the development of Radar Technology, requirements at the higher level are proposed to the frequency stability of frequency synthesizer, spectral purity, frequency range and frequency agility speed.Frequency synthesis is divided into direct synthesis, Phase locking frequency synthesis and direct digital synthesizers three kinds.Direct frequency synthesizer is primarily of components and parts compositions such as frequency multiplier, frequency divider, frequency mixer and filters.But the frequency synthesizer of existing structure cannot realize quick switching and the high-quality signal output requirement of frequency, therefore urgently improves.
Utility model content
The utility model is in order to overcome above-mentioned the deficiencies in the prior art, provide a kind of X-band broadband frequency synthesizer, the utility model provides a kind of frequency synthesizer of high performance, low phase noise, and the quick switching and the high-quality signal that achieve frequency preferably export requirement.
For achieving the above object, the utility model have employed following technical measures:
A kind of X-band broadband frequency synthesizer, this frequency synthesizer comprises crystal oscillator, and UHF frequency produces circuit, frequency multiplier mixer filter circuit and merit and divides isolator; The signal input part that signal output part and the UHF frequency of described crystal oscillator produce circuit is connected, the output that described UHF frequency produces circuit is connected with the input of frequency multiplier mixer filter circuit, and output and the merit of described frequency multiplier mixer filter circuit divide the input of isolator to be connected.
The utility model can also be realized further by following technical measures.
Preferably, described UHF frequency generation circuit comprises 2 octave filters, frequency divider, VHF merit filter-divider group, 9 octave filters, the first frequency mixer, UHF merit filter-divider group and digital control circuit;
The signal output part of described crystal oscillator is connected with the input of 2 octave filters and the input of 9 octave filters respectively; The described output of 2 octave filters is connected with the input of frequency divider, and the output of described frequency divider is connected with the input of VHF merit filter-divider group; The output of described 2 octave filters is connected with the input of frequency multiplier in frequency multiplier mixer filter circuit, and the output of described 2 octave filters is common after being also connected with the output of described VHF merit filter-divider group is connected with an input of the first frequency mixer;
The output of described 9 octave filters is connected with another input of the first frequency mixer, the output of described first frequency mixer is connected with the input of UHF merit filter-divider group, jointly after the output of described 9 octave filters is also connected with the output of described UHF merit filter-divider group is connected with the input of frequency mixer in frequency multiplier mixer filter circuit;
The output of described digital control circuit is connected with the control end of VHF merit filter-divider group with UHF merit filter-divider group respectively.
Preferably, described frequency multiplier mixer filter circuit comprises 40 octave filters, the first cavity body filter, the second frequency mixer, the second cavity body filter;
The input of described 40 octave filters is connected with the output of 2 octave filters, the output of described 40 octave filters is connected with the input of the first cavity body filter, the output of the first cavity body filter is connected with an input of the second frequency mixer, and another input of the second frequency mixer is also connected with the output of 9 octave filters and the output of described UHF merit filter-divider group; The output of described second frequency mixer is connected with the input of the second cavity body filter, and output and the described merit of described second cavity body filter divide the input of isolator to be connected.
Preferably, described digital control circuit is FPGA digital control circuit, and the model of described FPGA is the EP1C3T100I7 that altera corp of the U.S. produces.
Preferably, the model of described frequency divider is the HMC438 that Hittite company of the U.S. produces; The model of described first frequency mixer is the HMC208 that Hittite company of the U.S. produces; The model of described second frequency mixer is the HMC220 that Hittite company of the U.S. produces.
Preferably, described merit divides isolator to be that three merits divide isolator.
The beneficial effects of the utility model are:
1), this frequency synthesizer divides isolator to form by crystal oscillator, the generation of UHF frequency circuit, frequency multiplier mixer filter circuit and three merits, described crystal oscillator is for generation of the local oscillation signal of X-band, and UHF frequency produces circuit for generation of multichannel UHF point-frequency signal, described UHF frequency generation circuit and frequency multiplier mixer filter circuit are fitted to each other and jointly realize final output frequency.
It should be noted that, described UHF (UltraHighFrequency) refers to that frequency is the radio wave of 300 ~ 3000MHz; Described VHF (VeryHighFrequency) frequency band is by the radiobeam of 30 ~ 300MHz.
The frequency synthesizer with ad hoc structure in the utility model can realize-105dBc/Hz1KHz phase noise, Microsecond grade Hopping time, 400M output frequency bandwidth, the contour performance index of 40M stepped-frequency interval.Namely the output signal of this frequency synthesizer has the good characteristics such as ultralow phase noise, high-speed frequency-hopping time, low noise, and quick switching and the high-quality signal that can realize frequency preferably export requirement.
Be worth it is emphasized that: the utility model is only protected by above-mentioned physical unit and is connected the device or physical platform that the circuit between each physical unit forms, and does not relate to software section wherein.
2) the UHF frequency, in the utility model produces circuit and is made up of 2 octave filters, frequency divider, VHF merit filter-divider group, 9 octave filters, the first frequency mixer, UHF merit filter-divider group and digital control circuit, described digital control circuit part mainly provides control signal to VHF merit filter-divider group, UHF merit filter-divider group, carry out the switching between required frequency hopping frequency, to guarantee the stability that frequency switches and reliability.
Accompanying drawing explanation
Fig. 1 is the entire block diagram of circuit structure of the present utility model.
In figure, the implication of label symbol is as follows:
10-crystal oscillator
20-UHF frequency produces circuit 21-2 octave filter 22-frequency divider
23-VHF merit filter-divider group, 24-digital control circuit 25-9 octave filter
26-the first frequency mixer 27-UHF merit filter-divider group
30-frequency multiplier mixer filter circuit 31-40 octave filter 32-the first cavity body filter
33-the second frequency mixer 34-the second cavity body filter
40-merit divides isolator
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of X-band broadband frequency synthesizer, this frequency synthesizer comprises the generation of crystal oscillator 10, UHF frequency circuit 20, frequency multiplier mixer filter circuit 30 and merit and divides isolator 40.
Described UHF frequency produces circuit 20 and comprises 2 octave filters 21, frequency divider 22, VHF merit filter-divider group 23,9 octave filter 25, first frequency mixer 26, UHF merit filter-divider group 27 and digital control circuit 24; The signal output part of described crystal oscillator 10 is connected with the input of 2 octave filters 21 and the input of 9 octave filters 25 respectively; The output of described 2 octave filters 21 is connected with the input of frequency divider 22, and the output of described frequency divider 22 is connected with the input of VHF merit filter-divider group 23; The output of described 2 octave filters 21 is connected with the input of frequency multiplier in frequency multiplier mixer filter circuit 30, and the output of described 2 octave filters 21 is common after being also connected with the output of described VHF merit filter-divider group 23 is connected with an input of the first frequency mixer 26; The output of described 9 octave filters 25 is connected with another input of the first frequency mixer 26, the output of described first frequency mixer 26 is connected with the input of UHF merit filter-divider group 27, jointly after the output of described 9 octave filters 25 is also connected with the output of described UHF merit filter-divider group 27 is connected with the input of frequency mixer in frequency multiplier mixer filter circuit 30; The output of described digital control circuit 24 is connected with the control end of VHF merit filter-divider group 23 with UHF merit filter-divider group 27 respectively.
As shown in Figure 1, described frequency multiplier mixer filter circuit 30 comprises 40 octave filter 31, first cavity body filter 32, second frequency mixer 33, second cavity body filters 34; The input of described 40 octave filters 31 is connected with the output of 2 octave filters 21, the output of described 40 octave filters 31 is connected with the input of the first cavity body filter 32, the output of the first cavity body filter 32 is connected with an input of the second frequency mixer 33, and another input of the second frequency mixer 33 is also connected with the output of 9 octave filters 25 and the output of described UHF merit filter-divider group 27; The output of described second frequency mixer 33 is connected with the input of the second cavity body filter 34, and output and the described merit of described second cavity body filter 34 divide isolator 40 i.e. three merits to divide the input of isolator to be connected.
Described digital control circuit 20 in the present embodiment is FPGA digital control circuit, and the model of described FPGA is the EP1C3T100I7 that altera corp of the U.S. produces.FPGA carries out decoding to outside 4 TTL input control signals, controls the switch of described VHF merit filter-divider group 23 and UHF merit filter-divider group 27 under pulse signal acting in conjunction is squeezed in rising edge clock and outside.FPGA switches final output frequency by the radio-frequency (RF) switch controlling merit filter-divider group.
The model of described frequency divider 22 is the HMC438 that Hittite company of the U.S. produces; The model of described first frequency mixer 26 is the HMC208 that Hittite company of the U.S. produces; The model of described second frequency mixer 33 is the HMC220 that Hittite company of the U.S. produces.
Below the course of work of the present utility model is described as follows:
The local oscillation signal that 100MHz crystal oscillator sends produces the input of 8000MHz signal to the first cavity body filter 32 of X-band successively through 2 octave filter 21,40 octave filters 31, export 8000MHz signal to the second frequency mixer 33 i.e. HMC220 by the first cavity body filter 32; The local oscillation signal that 100MHz crystal oscillator sends produces first-harmonic, 2 subharmonic, 3 subharmonic, 4 subharmonic fractional frequency signals to the input of VHF merit filter-divider group 23 after 2 octave filters 21, frequency divider 22 i.e. HMC438.
Digital control circuit 20 i.e. EP1C3T100I7 passes through the output signal of control VHF merit filter-divider group 23, and 2 frequency-doubled signals sent in conjunction with 2 octave filters 21 realize 5 road VHF point-frequency signals, and this 5 road point-frequency signal is by a port of the first frequency mixer 26; 9 frequency-doubled signals that the local oscillation signal that 100MHz crystal oscillator sends also obtains after 9 octave filters 25 are delivered to the first frequency mixer 26 i.e. another input port of HMC208, described 5 road VHF point-frequency signals and 9 frequency-doubled signals Up/Down Conversion in the first frequency mixer 26 i.e. HMC208, produce 10 road UHF point-frequency signals; This 10 road UHF point-frequency signal enters UHF merit filter-divider group 27, same under the digital control circuit 20 i.e. control of EP1C3T100I7, the output signal of UHF merit filter-divider group 27 realizes 11 road UHF point-frequency signals in conjunction with 9 frequency-doubled signals that 9 octave filters 25 send; This 11 road UHF point-frequency signal is delivered to an input port of the second frequency mixer 33.
2 frequency-doubled signals that described 2 octave filters 21 send obtain 80 frequency-doubled signals through 40 octave filters 31, described 80 frequency-doubled signals enter another input port of the second frequency mixer 33 through the first cavity body filter 32, the signal obtained after described 80 frequency-doubled signals and described 11 road UHF point-frequency signal up-conversions is sent to the second cavity body filter 34, after filter and amplification, then isolator is divided to export through three merits.
Claims (6)
1. an X-band broadband frequency synthesizer, is characterized in that: this frequency synthesizer comprises crystal oscillator (10), UHF frequency produces circuit (20), frequency multiplier mixer filter circuit (30) and merit and divides isolator (40); The signal input part that signal output part and the UHF frequency of described crystal oscillator (10) produce circuit (20) is connected, the output that described UHF frequency produces circuit (20) is connected with the input of frequency multiplier mixer filter circuit (30), and output and the merit of described frequency multiplier mixer filter circuit (30) divide the input of isolator (40) to be connected.
2. a kind of X-band broadband frequency synthesizer as claimed in claim 1, is characterized in that: described UHF frequency produces circuit (20) and comprises 2 octave filters (21), frequency divider (22), VHF merit filter-divider group (23), 9 octave filters (25), the first frequency mixer (26), UHF merit filter-divider group (27) and digital control circuit (24);
The signal output part of described crystal oscillator (10) is connected with the input of 2 octave filters (21) and the input of 9 octave filters (25) respectively; The output of described 2 octave filters (21) is connected with the input of frequency divider (22), and the output of described frequency divider (22) is connected with the input of VHF merit filter-divider group (23); The output of described 2 octave filters (21) is connected with the input of frequency multiplier in frequency multiplier mixer filter circuit (30), and the output of described 2 octave filters (21) is connected with an input of the first frequency mixer (26) after being also connected with the output of described VHF merit filter-divider group (23) jointly;
The output of described 9 octave filters (25) is connected with another input of the first frequency mixer (26), the output of described first frequency mixer (26) is connected with the input of UHF merit filter-divider group (27), and the output of described 9 octave filters (25) is also connected with the output of described UHF merit filter-divider group (27) and is jointly connected with the input of frequency mixer in frequency multiplier mixer filter circuit (30) afterwards;
The output of described digital control circuit (24) is connected with the control end of VHF merit filter-divider group (23) with UHF merit filter-divider group (27) respectively.
3. a kind of X-band broadband frequency synthesizer as claimed in claim 2, is characterized in that: described frequency multiplier mixer filter circuit (30) comprises 40 octave filters (31), the first cavity body filter (32), the second frequency mixer (33), the second cavity body filter (34);
The input of described 40 octave filters (31) is connected with the output of 2 octave filters (21), the output of described 40 octave filters (31) is connected with the input of the first cavity body filter (32), the output of the first cavity body filter (32) is connected with an input of the second frequency mixer (33), and another input of the second frequency mixer (33) is also connected with the output of 9 octave filters (25) and the output of described UHF merit filter-divider group (27); The output of described second frequency mixer (33) is connected with the input of the second cavity body filter (34), and output and the described merit of described second cavity body filter (34) divide the input of isolator (40) to be connected.
4. a kind of X-band broadband frequency synthesizer as claimed in claim 3, is characterized in that: described digital control circuit (20) is FPGA digital control circuit, the model of described FPGA be altera corp of the U.S. produce EP1C3T100I7.
5. a kind of X-band broadband frequency synthesizer as claimed in claim 3, is characterized in that: the model of described frequency divider (22) is the HMC438 that Hittite company of the U.S. produces; The model of described first frequency mixer (26) is the HMC208 that Hittite company of the U.S. produces; The model of described second frequency mixer (33) is the HMC220 that Hittite company of the U.S. produces.
6. a kind of X-band broadband frequency synthesizer as described in any one of Claims 1 to 5, is characterized in that: described merit divides isolator (40) to be that three merits divide isolator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844863.7U CN205179021U (en) | 2015-10-27 | 2015-10-27 | X wave band broadband frequency synthesizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844863.7U CN205179021U (en) | 2015-10-27 | 2015-10-27 | X wave band broadband frequency synthesizer |
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| Publication Number | Publication Date |
|---|---|
| CN205179021U true CN205179021U (en) | 2016-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520844863.7U Expired - Fee Related CN205179021U (en) | 2015-10-27 | 2015-10-27 | X wave band broadband frequency synthesizer |
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| Country | Link |
|---|---|
| CN (1) | CN205179021U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533403A (en) * | 2016-10-26 | 2017-03-22 | 南京熊猫电子股份有限公司 | High-performance isolation, distribution and amplification equipment |
| CN112653426A (en) * | 2020-12-21 | 2021-04-13 | 贵州航天计量测试技术研究所 | Broadband extremely-narrow pulse signal generating circuit |
-
2015
- 2015-10-27 CN CN201520844863.7U patent/CN205179021U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106533403A (en) * | 2016-10-26 | 2017-03-22 | 南京熊猫电子股份有限公司 | High-performance isolation, distribution and amplification equipment |
| CN112653426A (en) * | 2020-12-21 | 2021-04-13 | 贵州航天计量测试技术研究所 | Broadband extremely-narrow pulse signal generating circuit |
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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: 20160420 Termination date: 20201027 |