CN109030991A - Judge the method for frequency multiplier working condition - Google Patents
Judge the method for frequency multiplier working condition Download PDFInfo
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- CN109030991A CN109030991A CN201810659178.5A CN201810659178A CN109030991A CN 109030991 A CN109030991 A CN 109030991A CN 201810659178 A CN201810659178 A CN 201810659178A CN 109030991 A CN109030991 A CN 109030991A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a kind of methods for judging frequency multiplier working condition, are related to millimeter wave frequency doubling technology field.Described method includes following steps: installation frequency multiplier first tests link；Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, the output power of the second frequency multiplier is observed by power meter, if there is output power at this time, and output power is in a normal power bracket, then the first frequency multiplier work at this time is in frequency multiplication state three times；If the second frequency multiplier does not have power output at this time, frequency multiplier work at this time has been damaged in secondary frequency multiplication state or frequency multiplier.The method is not needed by frequency spectrograph and frequency mixer, can judge the working condition of frequency multiplier.
Description
Technical field
The present invention relates to millimeter wave frequency doubling technology field more particularly to a kind of methods for judging frequency multiplier working condition.
Background technique
Millimeter wave refers to electromagnetic wave of the frequency within the scope of 30GHz-300GHz.Millimeter wave occupies in electromagnetic spectrum
Very special position.In millimeter wave field, there are two types of the modes that can directly obtain signal source, and one is millimeter wave locking phases
Source, one is millimeter wave oscillation sources.It can be in the way of obtaining signal source indirectly as frequency multiplication mode, i.e., by the microwave signal of high quality
Required millimeter, which is obtained, by many times frequency multiplication involves submillimeter wave.Frequency multiplication mode realizes that signal source structure is by a relatively simple, energy
The signal source of high quality in wider frequency range is enough obtained, therefore has obtained a large amount of application.In various frequency multiplication modes, again
Always it is inevitable that there are various clutters in the output frequency of frequency device, it is therefore desirable to carry out to the main frequency of frequency multiplier output
Spectrum measurement, to determine the main frequency of frequency multiplier output.Currently the most important ones is to borrow frequency mixer for the frequency of frequency multiplier
It is mixed to the IF frequency for being easier detection, then the IF frequency after mixing is measured again using frequency spectrograph, then instead
Push away the output frequency of frequency multiplier.
Summary of the invention
The technical problem to be solved by the present invention is to how provide one kind not needing by frequency spectrograph and frequency mixer, can sentence
The method of the working condition of disconnected frequency multiplier.
In order to solve the above technical problems, the technical solution used in the present invention is: a kind of judgement frequency multiplier working condition
Method, it is characterised in that include the following steps:
Frequency multiplier first is installed and tests link: the input terminal of the output end of the first frequency multiplier driving link and the first frequency multiplier is connected
It connects, the output end of the first frequency multiplier is connect with the input terminal of the first power amplifier, the output end of the first power amplifier and
The input terminal of varactor doubler connects, and the output end of the second frequency multiplier is connect with the input terminal of PM5 power meter, first function
Rate amplifier can carry out effective power amplification, and first power at the frequency multiplication three times that the first frequency multiplier inputs frequency
The power of amplifier output can drive the second frequency multiplier；
Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, observed by power meter
The output power of second frequency multiplier, if having output power at this time, and output power is in a normal power bracket, then
First frequency multiplier work at this time is in frequency multiplication state three times；If the second frequency multiplier does not have power output at this time, at this time frequency multiplication
Device work has been damaged in secondary frequency multiplication state or frequency multiplier.
A further technical solution lies in the method also includes determining whether frequency multiplier works in secondary frequency multiplication state
Method, include the following steps:
Frequency multiplier second is installed and tests link: the input terminal of the output end of the first frequency multiplier driving link and the first frequency multiplier is connected
It connects, the output end of the first frequency multiplier is directly connected to second power amplifier, connect in the output end of the second power amplifier
A PM5 power meter is connect, second power amplifier can be had at the secondary frequency multiplication that the first frequency multiplier inputs frequency
The power amplification of effect；
Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, and seen by power meter
The output power of the second power amplifier is examined, if the second power amplifier is normal at this time, and the second power amplifier output work
Rate is higher, and the first frequency multiplier work at this time is in secondary frequency multiplication state；If at this point, the second power amplifier does not work normally,
Then the first frequency multiplier does not work normally at this time.
Preferably, first power amplifier is the power amplifier of W-waveband.
Preferably, first power amplifier can carry out effective power amplification at 99GHz.
Preferably, second power amplifier is the power amplifier of E-band.
Preferably, second power amplifier can carry out effective power amplification at 66GHz.
A further technical solution lies in, the method also includes obtaining the first frequency multiplier output frequency, method
As follows: the frequency of input signal is it is known that the frequency of input signal obtains first frequency multiplication multiplied by the frequency of the first frequency multiplier
The output frequency of device.
The beneficial effects of adopting the technical scheme are that this method is by the power for knowing working frequency in advance
Amplifier and the rear class frequency multiplier for knowing working frequency in advance, before being determined by judging the output size of rear end frequency multiplier power
Hold the working condition of frequency multiplier.The method can accurately judge the work of frequency multiplier in the case where routine test means lack
Make state, and actual mechanical process very simple.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the functional block diagram of the first frequency multiplier described in the method for the embodiment of the present invention；
Fig. 2 is the functional block diagram that frequency multiplier first tests link in the method for the embodiment of the present invention；
Fig. 3 is the functional block diagram that frequency multiplier second tests link in the method for the embodiment of the present invention；
Wherein: 1, two pole of Schottky of the first sheet metal 2, the second sheet metal 3, WR28 waveguide 4, short circuit metallic block 5,4 anode knots
Pipe 6, WR10 waveguide.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Overall, the embodiment of the invention discloses a kind of methods for judging frequency multiplier working condition to include the following steps:
Frequency multiplier first is installed and tests link: the input terminal of the output end of the first frequency multiplier driving link and the first frequency multiplier is connected
It connects, the output end of the first frequency multiplier is connect with the input terminal of the first power amplifier, the output end of the first power amplifier and
The input terminal of varactor doubler connects, and the output end of the second frequency multiplier is connect with the input terminal of PM5 power meter, first function
Rate amplifier can carry out effective power amplification, and first power at the frequency multiplication three times that the first frequency multiplier inputs frequency
The power of amplifier output can drive the second frequency multiplier；
Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, observed by power meter
The output power of second frequency multiplier, if having output power at this time, and output power is in a normal power bracket, then
First frequency multiplier work at this time is in frequency multiplication state three times；If the second frequency multiplier does not have power output at this time, at this time frequency multiplication
Device work has been damaged in secondary frequency multiplication state or frequency multiplier.
Obtain the first frequency multiplier output frequency: the frequency of input signal it is known that the frequency of input signal multiplied by the first frequency multiplication
The frequency of device obtains the output frequency of first frequency multiplier.
Further, the method is mainly used in work shape when lacking frequency spectrograph and frequency mixer to frequency multiplier
State is determined.It is specifically applied with one below to illustrate how to sentence the working condition of frequency multiplier using this method
It is fixed.
Such as (specific structure of frequency multiplier is existing so that an input frequency is in the frequency multiplier of Ka frequency range (33GHz) as an example
Have technology, this will not be repeated here), the present invention claims the first frequency multiplier, frequency multiplier circuit as shown in Fig. 1, according to frequency multiplier circuit
Theory, when the schottky diode device of 4 anode knots in attached drawing 1 is upper and lower reverse parallel connection, theoretically secondary frequency multiplication
Directly it is suppressed, but in actual operation, the installation of Schottky diode can not reach complete symmetrical above and below, this
It has led in output frequency it is possible that device does not operate at frequency multiplication frequency three times, according to double-frequency theory, various non-thread
In property harmonic wave, second harmonic energy is most strong, therefore the first frequency multiplier is possible to work in the mode of secondary frequency multiplication frequency.Therefore it is
Judgement the first frequency multiplier output is frequency multiplication output three times or secondary frequency multiplication output on earth, can use institute of the present invention
The method of proposition determines that the specific method is as follows to the working condition of frequency multiplier:
Prepare the power amplifier of a W-waveband (present invention claims the first power amplifier), it is desirable that the amplifier needs can be
First frequency multiplier, which inputs, carries out effective power amplification at the frequency multiplication three times of frequency, in the present invention, need to meet at 99GHz into
The effective power amplification of row, prepares No. 2 frequency multipliers (present invention claims the second frequency multiplier) of 99GHz a to 198GHz, W-waveband
Power amplifier output power should meet the driving power that can drive the second frequency multiplier.In test process, as shown in Fig. 2,
By the front-end driven link of the first frequency multiplier, the first frequency multiplier, the first power amplifier is connected with the second frequency multiplier of end, end
Second frequency multiplier at end connects PM5 power meter, and PM5 power meter can carry out power detection to the power of millimeter wave frequency band.By
The front-end driven circuit of one frequency multiplier, the first frequency multiplier, the first power amplifier and the second frequency multiplier electricity are orderly electrically connected,
The output power of end frequency multiplier is observed, if having output power at this time, and output power is in a normal power bracket,
That is it is considered that frequency multiplier works in frequency multiplication state three times at this time.If the second frequency multiplier does not have power output, Wo Menke at this time
To think that frequency multiplier work has been damaged in secondary frequency multiplication state or frequency multiplier.
It, at this time can be in the end of the first frequency multiplier in order to determine whether the first frequency multiplier works in secondary frequency multiplication state
It is directly connected to the power amplifier (the second power amplifier) of an E-band, as shown in Fig. 3, it is desirable that amplifier needs can
Effective power amplification can be carried out at the secondary frequency multiplication of the first frequency multiplier input frequency, in the present invention, need to meet
Effective power amplification is carried out at 66GHz, if power amplifier is normal at this time, and power amplifier output power is higher, I
At this time can with fully validated first frequency multiplier work in secondary frequency multiplication state.If at this point, power amplifier does not have normal work
Make, then at this time one can consider that the work of the first frequency multiplier is out of joint, it is possible to which there are the possibility that frequency multiplier is burnt.
Institute's the method through the invention, can be in the case where lacking frequency mixer and frequency spectrograph, it is only necessary to corresponding function
Rate amplifier and frequency multiplier and corresponding power meter, can just determine the output frequency of frequency multiplier completely, determine frequency multiplier
Working condition, simple possible, strong operability.
Claims (7)
1. a kind of method for judging frequency multiplier working condition, it is characterised in that include the following steps:
Frequency multiplier first is installed and tests link: the input terminal of the output end of the first frequency multiplier driving link and the first frequency multiplier is connected
It connects, the output end of the first frequency multiplier is connect with the input terminal of the first power amplifier, the output end of the first power amplifier and
The input terminal of varactor doubler connects, and the output end of the second frequency multiplier is connect with the input terminal of PM5 power meter, first function
Rate amplifier can carry out effective power amplification, and first power at the frequency multiplication three times that the first frequency multiplier inputs frequency
The power of amplifier output can drive the second frequency multiplier；
Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, observed by power meter
The output power of second frequency multiplier, if having output power at this time, and output power is in a normal power bracket, then
First frequency multiplier work at this time is in frequency multiplication state three times；If the second frequency multiplier does not have power output at this time, at this time frequency multiplication
Device work has been damaged in secondary frequency multiplication state or frequency multiplier.
2. judging the method for frequency multiplier working condition as described in claim 1, it is characterised in that the method also includes determinations
Whether frequency multiplier works in the method for secondary frequency multiplication state, includes the following steps:
Frequency multiplier second is installed and tests link: the input terminal of the output end of the first frequency multiplier driving link and the first frequency multiplier is connected
It connects, the output end of the first frequency multiplier is directly connected to second power amplifier, connect in the output end of the second power amplifier
A PM5 power meter is connect, second power amplifier can be had at the secondary frequency multiplication that the first frequency multiplier inputs frequency
The power amplification of effect；
Judge working condition: inputting a test signal to the input terminal of the first frequency multiplier driving link, and seen by power meter
The output power of the second power amplifier is examined, if the second power amplifier is normal at this time, and the second power amplifier output work
Rate is higher, and the first frequency multiplier work at this time is in secondary frequency multiplication state；If at this point, the second power amplifier does not work normally,
Then the first frequency multiplier does not work normally at this time.
3. judging the method for frequency multiplier working condition as described in claim 1, it is characterised in that: first power amplifier
For the power amplifier of W-waveband.
4. judging the method for frequency multiplier working condition as described in claim 1, it is characterised in that: first power amplifier
Effective power amplification can be carried out at 99GHz.
5. judging the method for frequency multiplier working condition as claimed in claim 2, it is characterised in that: second power amplifier
For the power amplifier of E-band.
6. judging the method for frequency multiplier working condition as claimed in claim 2, it is characterised in that: second power amplifier
Effective power amplification can be carried out at 66GHz.
7. judging the method for frequency multiplier working condition as described in claim 1, it is characterised in that: the method also includes obtaining
The step of first frequency multiplier output frequency, the method is as follows:
The frequency of input signal is it is known that the frequency of input signal obtains first frequency multiplier multiplied by the frequency of the first frequency multiplier
Output frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810659178.5A CN109030991B (en) | 2018-06-25 | 2018-06-25 | Method for judging working state of frequency multiplier |
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| CN201810659178.5A CN109030991B (en) | 2018-06-25 | 2018-06-25 | Method for judging working state of frequency multiplier |
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| CN109030991B CN109030991B (en) | 2020-09-15 |
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| US5309479A (en) * | 1991-04-29 | 1994-05-03 | Hughes Aircraft Company | Low Cost Ku band transmitter |
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| CN102435848A (en) * | 2011-11-25 | 2012-05-02 | 中国航天科工集团第二研究院二〇三所 | Comparison device for verifying capacity of phase noise in Ka wave band |
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| US5309479A (en) * | 1991-04-29 | 1994-05-03 | Hughes Aircraft Company | Low Cost Ku band transmitter |
| CN102419398A (en) * | 2011-11-25 | 2012-04-18 | 中国航天科工集团第二研究院二〇三所 | Phase noise capability verification comparison apparatus applied to Ku and K wave band ranges |
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| CN104980109A (en) * | 2015-05-08 | 2015-10-14 | 中国电子科技集团公司第四十一研究所 | Half-intermediate-frequency spurious response suppression method and device applied to superheterodyne test instrument |
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