CN206077363U - A kind of frequency measurement machine - Google Patents
A kind of frequency measurement machine Download PDFInfo
- Publication number
- CN206077363U CN206077363U CN201620938117.9U CN201620938117U CN206077363U CN 206077363 U CN206077363 U CN 206077363U CN 201620938117 U CN201620938117 U CN 201620938117U CN 206077363 U CN206077363 U CN 206077363U
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- CN
- China
- Prior art keywords
- wave filter
- frequency
- outfan
- cymoscopes
- process circuit
- Prior art date
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- Expired - Fee Related
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- 238000005259 measurement Methods 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
A kind of frequency measurement machine, the multiple cymoscopes being connected including the wave filter that multiple bandwidth are continuous and step-length is equal and with filter output, the outfan of one power splitter more than a point connects multiple wave filter respectively, input connects measured signal, set multiple cymoscopes are all connected to a process circuit being made up of comparator circuit, and the process circuit is provided with for representing the outfan of measured signal frequency separation.The utility model has the advantages that design is simple, and low cost, and volume is very little, when the frequency-measurement accuracy of system requirements is not high, can provide bigness scale frequency for system.
Description
Technical field
This utility model is related to electronic technology field, especially a kind of frequency measurement machine.
Background technology
At present, most Fast Frequency Estimation machines be all the change of the phase place for measuring input signal carrying out Fast Frequency Estimation, it is main
If by the instantaneous receiver structure of multi-sampling rate numeral, with the analog-digital converter compared with low sampling rate realize software that overall with opens without
Line electricity instantaneous frequency measurement, needs very big dynamic range and complicated software to improve signal to noise ratio, solution frequency ambiguity, solution frequency alias
It is complicated Deng, test philosophy, implement that difficulty is big, cost and price is accordingly high, and measurement sensitivity is not high, and volume is also very huge
Greatly.
The content of the invention
The purpose of this utility model is to provide a kind of frequency measurement machine, overcomes prior art to realize difficulty, high cost, bulky
Shortcoming.
The technical solution adopted in the utility model is a kind of frequency measurement machine, including the filtering that multiple bandwidth are continuous and step-length is equal
Device and the multiple cymoscopes being connected with filter output, the outfan of a power splitter more than a point connect multiple filtering respectively
Device, input connection measured signal, set multiple cymoscopes are all connected to a process electricity being made up of comparator circuit
Road, the process circuit are provided with for representing the outfan of measured signal frequency separation.
The wave filter has four, and the outfan of each wave filter is respectively connected with cymoscope, one point of four power splitter
Outfan connects four wave filter respectively, and four cymoscopes are all connected to a process electricity being made up of four comparator circuits
Road.
Compared with prior art, the utility model has the advantages that system structure is simple, frequency measurement speed is fast, small volume, cost
It is low, when the frequency-measurement accuracy of system requirements is not high, bigness scale frequency can be provided using system solution.
Description of the drawings
Fig. 1 is the structural representation of one embodiment of this utility model.
1：One point of four power splitter, 21：Wave filter 1,22：Wave filter 2,23：Wave filter 3,24：Wave filter 4,31：Cymoscope
1,32：Cymoscope 2,33：Cymoscope 3,34：Cymoscope 4,4：Process circuit, 5：Measured signal, 6：Frequency code.
Specific embodiment
As shown in figure 1, this utility model realizes Fast Frequency Estimation using wave filter group and geophone group.Measured signal 5 is first
Radio-frequency (RF) energy decile, the signal that four road work(are branched away are separately input to into four bands in being first input into one one point four power splitters 1
Process is filtered in the wide continuous and equal wave filter 21,22,23,24 of step-length, the signal difference Jing of each wave filter output
Crossing cymoscope 31,32,33,34 carries out detection process, the detecting circuit of output corresponding signal, the signal loading for finally going out detection
It is compared in a process circuit 4 being made up of comparator circuit and draws frequency code 6, it can be determined which input signal is in
In the bandwidth of individual wave filter, that is, obtain the frequency separation at signal frequency place.
Embodiment one
From four wave filter, its filtering bandwidth is respectively：Wave filter 21：6GHz～6.5GHz；Wave filter 22：6.5GHz
～7.0GHz；Wave filter 23：7.0GHz～7.5GHz；Wave filter 24：7.5GHz～8GHz；Assume measured signal 5 frequency be
6.8GHz, first, measured signal 5 carries out work(point through one point of four power splitter 1, exports the same signal of four tunnel watt levels, so
Afterwards, respectively through power detection is carried out after respective band filter 21,22,23,24, each cymoscope output is right for four road signals
The detecting circuit of induction signal, as 6.8GHz signals fall in 22 passband of wave filter, then the channel output power is larger, remaining filter
21,23,24 no signal of ripple device group is exported or signal power is less；Finally, the detecting circuit of No. four cymoscopes 31,32,33,34 is defeated
Be compared in going out to send into process circuit 4, four in process circuit 4 comparator circuit respectively to each detection output voltage with
The absolute thresholding being previously set is compared, if detecting circuit is more than threshold level, exports high level, otherwise exports low electricity
It is flat, thus wave filter 22 this signal output high level all the way, the signal output low level of remaining wave filter group, it can thus be appreciated that input
5 frequency of measured signal in the band connection frequency of wave filter 22 is interval.Due to wave filter in the actual course of processing its frequency
Curve is not vertical, but has a transition zone.In order to process these transition zones, need to carry out in the comparator below
Calibration.Such as wave filter 21, when input signal is -4dBm, and incoming frequency is 6.51GHz, the cymoscope after wave filter 21 is defeated
Go out the comparison threshold as comparator.When incoming frequency is 6.0～6.5GHz, the output of cymoscope should be greater than this thresholding；
When incoming frequency is other frequency ranges, the output of cymoscope should be less than this threshold value.
According to the thinking of system schema, work(point is carried out using the multi-path power divider of more multichannel with reference to practical situation, then
Respectively enter and frequency measurement process path is constituted by wave filter, cymoscope and comparator.As the bandwidth by wave filter is limited, this is quick
The frequency-measurement accuracy of frequency measurement machine is not high, but its system structure is simple, and frequency measurement speed is fast, small volume, cost are low, when system requirements
When frequency-measurement accuracy is not high, bigness scale frequency can be provided for system.
Claims (2)
1. a kind of frequency measurement machine, it is characterised in that including the wave filter that multiple bandwidth are continuous and step-length is equal and defeated with wave filter
Go out multiple cymoscopes of end connection, the outfan of a power splitter more than a point connects multiple wave filter respectively, and input connection is treated
Signal is surveyed, set multiple cymoscopes are all connected to a process circuit being made up of comparator circuit, the process circuit
It is provided with for representing the outfan of measured signal frequency separation.
2. a kind of frequency measurement machine according to claim 1, it is characterised in that the wave filter has four, each wave filter
Outfan is respectively connected with cymoscope, and the outfan of one point of four power splitter connects four wave filter respectively, and four cymoscopes are equal
It is connected to a process circuit being made up of four comparator circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620938117.9U CN206077363U (en) | 2016-08-25 | 2016-08-25 | A kind of frequency measurement machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620938117.9U CN206077363U (en) | 2016-08-25 | 2016-08-25 | A kind of frequency measurement machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206077363U true CN206077363U (en) | 2017-04-05 |
Family
ID=58431672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620938117.9U Expired - Fee Related CN206077363U (en) | 2016-08-25 | 2016-08-25 | A kind of frequency measurement machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206077363U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667484A (en) * | 2018-03-26 | 2018-10-16 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Incoherent spread spectrum digital transceiver instantaneous frequency measurement and demodulation method |
| CN118566849A (en) * | 2024-07-30 | 2024-08-30 | 成都世源频控技术股份有限公司 | Circuit and method for improving detection dynamic range |
-
2016
- 2016-08-25 CN CN201620938117.9U patent/CN206077363U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667484A (en) * | 2018-03-26 | 2018-10-16 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Incoherent spread spectrum digital transceiver instantaneous frequency measurement and demodulation method |
| CN108667484B (en) * | 2018-03-26 | 2020-03-31 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Instantaneous frequency measurement and demodulation method for incoherent spread spectrum digital transceiver |
| CN118566849A (en) * | 2024-07-30 | 2024-08-30 | 成都世源频控技术股份有限公司 | Circuit and method for improving detection dynamic range |
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| GR01 | Patent grant | ||
| 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: 20170405 |