CN208849735U - A kind of millimeter wave broadband low-converter - Google Patents
A kind of millimeter wave broadband low-converter Download PDFInfo
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- CN208849735U CN208849735U CN201821285311.7U CN201821285311U CN208849735U CN 208849735 U CN208849735 U CN 208849735U CN 201821285311 U CN201821285311 U CN 201821285311U CN 208849735 U CN208849735 U CN 208849735U
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- frequency
- local oscillator
- input
- filter
- fixed attenuator
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Abstract
The utility model relates to converter technology field, specifically a kind of millimeter wave broadband low-converter.The utility model includes fixed attenuator, low-noise amplifier, balanced device, switch filter group, frequency mixer, the one 2 frequency multiplier, the first local oscillator filter, the 2nd 2 frequency multiplier, the second local oscillator filter, intermediate-frequency filter, intermediate frequency amplifier and electrically controlled attenuator.As seen from the figure, rf inputs, local oscillator input terminal and medium frequency output end have a fixed attenuator ATN3580-05.The introducing of the fixed attenuator significantly improves the standing wave of product input/output terminal.
Description
Technical field
The utility model relates to converter technology field, specifically a kind of millimeter wave broadband low-converter.
Background technique
Currently, the development of millimetre-wave attenuator field is swift and violent, higher and higher to the technical requirement of broadband system.Currently, city
The existing millimeter wave broadband low-converter in face, input and output standing wave index is poor, is commonly 2.0.Input and output standing wave index
Difference, will lead to the roundtrip of signal be superimposed so that signal is distorted, the bit error rate is increased, and influences communication efficiency and effect
Rate.
Summary of the invention
Aiming at the defects existing in the prior art, the technical problem to be solved by the present invention is to provide one kind
Millimeter wave broadband low-converter solves the problems, such as millimeter wave broadband low-converter input and output standing wave index error.
The utility model technical solution used for the above purpose is: a kind of millimeter wave broadband low-converter, packet
Include local oscillator input channel, radio frequency input channel, frequency mixer and intermediate frequency output channel；
The local oscillator input channel includes the first fixed attenuator being linked in sequence, the one 2 frequency multiplier, first vibration filter wave
Device, the 2nd 2 frequency multiplier and the second local oscillator filter, the input terminal connection local oscillator input of first fixed attenuator, described the
The output end of two local oscillator filters connects an input terminal of the frequency mixer；
The radio frequency input channel includes the second fixed attenuator, amplifier, balanced device and the switch filtering of preface connection
The input terminal connection radio frequency of device group, second fixed attenuator inputs, described in the output end connection of the switch filter group
Another input terminal of frequency mixer；
The intermediate frequency output channel includes intermediate-frequency filter, intermediate frequency amplifier, electrically controlled attenuator and the third being linked in sequence
Fixed attenuator, the input terminal of the intermediate-frequency filter connect the output end of the frequency mixer, the third fixed attenuator
Output end is exported as intermediate frequency.
The amplifier is low-noise amplifier.
The utility model have the following advantages that and the utility model has the advantages that
1, the utility model uses millimeter wave hybrid integration technology, and consolidating for bare chip is added in frequency converter input/output port
Determine attenuator, meanwhile, in the RF signal input end universal amplifier previous using the amplifier substitution of ultra-low noise.In this way
Not only it ensure that the noise coefficient of product deteriorated unlike previous, but also significantly improved the input and output standing wave of frequency converter.
2, the input and output standing wave index of the millimeter wave broadband low-converter of the utility model greatly improves, and reaches 1.25；
Noise coefficient is compared with the past to be remained unchanged, and is 10dB.
3, the realization difficulty of the utility model reduces, cost reduces.
4, product size becomes smaller, smaller than conventional implementation by 75%.
Detailed description of the invention
Fig. 1 is the overall structure figure of the utility model；
Fig. 2 is the input return loss figure of the low-noise amplifier of the utility model itself；
Fig. 3 is the rf inputs return loss and medium frequency output end return loss measured drawing of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of millimeter wave broadband low-converter, including fixed attenuator, low-noise amplifier, balanced device,
Switch filter group, frequency mixer, the one 2 frequency multiplier, the first local oscillator filter, the 2nd 2 frequency multiplier, the second local oscillator filter, in
Frequency filter, intermediate frequency amplifier and electrically controlled attenuator.As seen from Figure 1, rf inputs, local oscillator input terminal and intermediate frequency output
There is a fixed attenuator ATN3580-05 at end.The introducing of the fixed attenuator significantly improves product input/output terminal
Standing wave.Fixed attenuator ATN3580-05 is added in the rf inputs mouth of frequency converter, improves input port standing wave.Low noise
The input return loss of amplifier itself is 14dB (corresponding standing-wave ratio be 1.5:1), addition fixed attenuator ATN3580-05 it
Afterwards, the return loss of rf inputs mouth should theoretically become 24dB (corresponding standing-wave ratio is 1.13:1), the input of product radio frequency
End actual measurement return loss be 23.6dB (correspondence standing-wave ratio be 1.14:1), meet technical protocol " input and output standing wave :≤
The requirement of 1.25:1 ".
That connected first in the rf inputs mouth of frequency converter is fixed attenuator ATN3580-05, fixed attenuator it
It afterwards, is followed by exactly low-noise amplifier HMC-ALH476.The low-noise amplifier is interior matched amplifier bare chip, is only needed
Required direct current biasing is provided for it, it can be worked normally.Fixed attenuator ATN3580-05 and low noise amplification
Between device HMC-ALH476, then without other circuits, ensure that radio frequency input standing wave while meeting technical protocol, produces in this way
The noise coefficient of product is as well as possible.After the completion of product development, through actual measurement, the noise coefficient of product is also to fully meet technology
The requirement of agreement " noise coefficient :≤15dB ".
As shown in Fig. 2, the input return loss of low-noise amplifier itself be most almost 14dB (corresponding standing-wave ratio is 1.5:
1)。
It is similar with rf inputs, in the local oscillator input port and medium frequency output end mouth of frequency converter, fixed attenuator is added
ATN3580-05 plays corresponding improvement result to the standing wave of local oscillator input port and medium frequency output end mouth.Product local oscillator
It is 1.20:1 that input terminal, which surveys standing-wave ratio, and it is 1.12:1 that medium frequency output end, which surveys standing-wave ratio, and being all satisfied technical protocol, " input is defeated
Standing wave out: the requirement of≤1.25:1 ", as shown in Figure 3.Fixation is not added in frequency converter product input/output terminal in the prior art
Attenuator, product rf inputs standing wave are 1.7:1, and local oscillator input terminal is 1.6:1, medium frequency output end 1.5:1.It is possible thereby to
Find out, by the improvement of the utility model, the input and output standing wave of frequency converter is greatly improved.
After the fixed attenuator ATN3580-05 of rf inputs, the utility model has selected low-noise amplifier
HMC-ALH476.It since low-noise amplifier HMC-ALH476 noise coefficient is very low, can reach lower than 2dB, to guarantee whole
The noise coefficient index of a product is lower than 10dB, has reached requirement of the system to noise coefficient.
In addition, the local oscillation signal of the frequency converter, using 2 frequencys multiplication, filtering, 2 frequencys multiplication, filter again by the way of, realize local oscillator
4 frequencys multiplication of signal.The local oscillation signal of millimeter wave frequency band needed for this scheme allows for product, can be in low-frequency Microwave Frequency
Duan Xianjin horizontal lock, to reduce the realization difficulty and cost of implementation of product.
To sum up, the utility model has the following characteristics that 1, declines in the fixation that bare chip is added in frequency converter input/output port
Subtract device ATN3580-05, improves input/output port standing wave.2, the amplifier of ultra-low noise is used in RF signal input end
The previous universal amplifier of HMC-ALH476 substitution, to guarantee that the noise coefficient of product deteriorates unlike previous.3, in low frequency
Upper locking phase is sent into frequency mixer after 4 frequencys multiplication and is mixed, reduces the cost of implementation and DC power of product.4, mixed using millimeter wave
Integrated technique is closed, product is integrated, the volume size of product is substantially reduced.
Claims (2)
1. a kind of millimeter wave broadband low-converter, which is characterized in that including local oscillator input channel, radio frequency input channel, frequency mixer
With intermediate frequency output channel；
The local oscillator input channel include be linked in sequence the first fixed attenuator, the one 2 frequency multiplier, the first local oscillator filter,
2nd 2 frequency multiplier and the second local oscillator filter, the input terminal connection local oscillator input of first fixed attenuator, described second
The output end of polarization filter connects an input terminal of the frequency mixer；
The radio frequency input channel includes the second fixed attenuator, amplifier, balanced device and the switch filter group being linked in sequence,
The input terminal connection radio frequency input of second fixed attenuator, the output end of the switch filter group connect the frequency mixer
Another input terminal；
The intermediate frequency output channel includes that intermediate-frequency filter, intermediate frequency amplifier, electrically controlled attenuator and the third being linked in sequence are fixed
Attenuator, the input terminal of the intermediate-frequency filter connect the output end of the frequency mixer, the output of the third fixed attenuator
End is exported as intermediate frequency.
2. a kind of millimeter wave broadband low-converter according to claim 1, which is characterized in that the amplifier is low noise
Amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821285311.7U CN208849735U (en) | 2018-08-10 | 2018-08-10 | A kind of millimeter wave broadband low-converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821285311.7U CN208849735U (en) | 2018-08-10 | 2018-08-10 | A kind of millimeter wave broadband low-converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208849735U true CN208849735U (en) | 2019-05-10 |
Family
ID=66353750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821285311.7U Expired - Fee Related CN208849735U (en) | 2018-08-10 | 2018-08-10 | A kind of millimeter wave broadband low-converter |
Country Status (1)
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| CN (1) | CN208849735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088602A (en) * | 2018-08-10 | 2018-12-25 | 成都众景天成科技有限公司 | A kind of millimeter wave broadband low-converter |
-
2018
- 2018-08-10 CN CN201821285311.7U patent/CN208849735U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088602A (en) * | 2018-08-10 | 2018-12-25 | 成都众景天成科技有限公司 | A kind of millimeter wave broadband low-converter |
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| Date | Code | Title | Description |
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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: 20190510 Termination date: 20190810 |