CN203708198U - Up-frequency-converter circuit - Google Patents
Up-frequency-converter circuit Download PDFInfo
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- CN203708198U CN203708198U CN201320889952.4U CN201320889952U CN203708198U CN 203708198 U CN203708198 U CN 203708198U CN 201320889952 U CN201320889952 U CN 201320889952U CN 203708198 U CN203708198 U CN 203708198U
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- frequency
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- pass filter
- low pass
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- 230000010355 oscillation Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 abstract description 6
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Abstract
An up-frequency-converter circuit is disclosed and relates to a frequency converter. The up-frequency-converter circuit comprises a low pass filter, a frequency mixer, a local oscillator drive amplifier and a radio frequency drive amplifier. An intermediate frequency signal is output to an input end of the low pass filter, the output end of the low pass filter is connected with a first input end of the frequency mixer, a local oscillator signal is output to an input end of the local oscillator drive amplifier, an output end of the local oscillator drive amplifier is connected with a second input end of the frequency mixer, an output end of the frequency mixer is connected with an input end of the radio frequency drive amplifier, and a radiofrequency signal is output through the radio frequency drive amplifier. The up-frequency-converter circuit of the utility model is characterized in that isolation between an intermediate frequency and a radio frequency can be effectively improved, and the up-frequency-converter circuit can be widely applied to various radio frequency and microwave communication receiving devices and signal emitting devices.
Description
Technical field
The utility model relates to frequency converter, particularly a kind of up-converter circuits.
Background technology
Since 19th-century maxwell Theory of Electromagnetic Field is set up, radiotechnics has been deep into the every field of Human routine activities.Radiotechnics is widely used at engineering fields such as the energy, traffic, medical treatment and information.
Electromagnetic wave is as the carrier of a kind of energy or information, and its most basic physical quantity is frequency and power.Extensive along with what apply, it is further important that frequency converter becomes in frequency and power application, is almost the critical component of all radio frequencies and microwave communication receiver and signal projector.The major function of upconverter be by signal from a lower frequency inverted to another higher frequency, and the power of signal is amplified, thereby makes the work of other functional circuits such as signal amplification, filtering, detection and transmission more effective.
But the isolation of existing upconverter if-to-rf is poor, be difficult to meet the application demand of some certain applications.
Summary of the invention
In order to solve the poor technical problem of isolation of existing upconverter if-to-rf, the utility model proposes a kind of up-converter circuits, comprising: low pass filter, frequency mixer, local oscillator driving amplifier and radio frequency driver amplifier; Intermediate-freuqncy signal exports the input of low pass filter to, the output of low pass filter is connected with the first input end of frequency mixer, local oscillation signal exports the input of local oscillator driving amplifier to, the output of local oscillator driving amplifier is connected with the second input of frequency mixer, the output of frequency mixer is connected with the input of radio frequency driver amplifier, radio frequency driver amplifier output radiofrequency signal.
Up-converter circuits of the present utility model, has effectively promoted the isolation of if-to-rf, is widely used in various radio frequencies and microwave communication receiver and signal projector.
Brief description of the drawings
Fig. 1 is the electrical block diagram of a kind of up-converter circuits of the present utility model.
Embodiment
Describe up-converter circuits of the present utility model in detail below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model proposes a kind of up-converter circuits, comprising: low pass filter, frequency mixer, local oscillator driving amplifier and radio frequency driver amplifier; Intermediate-freuqncy signal exports the input of low pass filter to, the output of low pass filter is connected with the first input end of frequency mixer, local oscillation signal exports the input of local oscillator driving amplifier to, the output of local oscillator driving amplifier is connected with the second input of frequency mixer, the output of frequency mixer is connected with the input of radio frequency driver amplifier, radio frequency driver amplifier output radiofrequency signal.
Described low pass filter can be selected oval filtering low pass filter.
In order to reduce port standing wave, can increase by the first T-shaped resistance decrement network at the input of local oscillator driving amplifier, local oscillation signal exports the input (be the input that local oscillation signal exports the first T-shaped resistance decrement network to, the output of the first T-shaped resistance decrement network is connected with the input of local oscillator driving amplifier) of local oscillator driving amplifier to by the first T-shaped resistance decrement network; Also the second T-shaped resistance decrement network (output that is frequency mixer is connected with the input of the second T-shaped resistance decrement network, and second output of T-shaped resistance decrement network and the input of radio frequency driver amplifier are connected) of can connecting between the output of frequency mixer and the input of radio frequency driver amplifier.
Test result shows, the isolation of the if-to-rf of common up-converter circuits is >=10dB, and the isolation of the if-to-rf of up-converter circuits of the present utility model is >=40dB.
Claims (5)
1. a up-converter circuits, is characterized in that, comprising: low pass filter, frequency mixer, local oscillator driving amplifier and radio frequency driver amplifier; Intermediate-freuqncy signal exports the input of low pass filter to, the output of low pass filter is connected with the first input end of frequency mixer, local oscillation signal exports the input of local oscillator driving amplifier to, the output of local oscillator driving amplifier is connected with the second input of frequency mixer, the output of frequency mixer is connected with the input of radio frequency driver amplifier, radio frequency driver amplifier output radiofrequency signal.
2. a kind of up-converter circuits as claimed in claim 1, is characterized in that, described low pass filter is oval filtering low pass filter.
3. a kind of up-converter circuits as claimed in claim 1, is characterized in that, also comprises the first T-shaped resistance decrement network, and described local oscillation signal exports the input of described local oscillator driving amplifier to by the first described T-shaped resistance decrement network.
4. a kind of up-converter circuits as claimed in claim 3, is characterized in that, described low pass filter is oval filtering low pass filter.
5. a kind of up-converter circuits as described in claim 1 to 4 any one, is characterized in that, between the output of described frequency mixer and the input of described radio frequency driver amplifier, is in series with the second T-shaped resistance decrement network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889952.4U CN203708198U (en) | 2013-12-31 | 2013-12-31 | Up-frequency-converter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889952.4U CN203708198U (en) | 2013-12-31 | 2013-12-31 | Up-frequency-converter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203708198U true CN203708198U (en) | 2014-07-09 |
Family
ID=51058575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320889952.4U Expired - Lifetime CN203708198U (en) | 2013-12-31 | 2013-12-31 | Up-frequency-converter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203708198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150214A (en) * | 2018-10-12 | 2019-01-04 | 南京屹信航天科技有限公司 | A kind of miniaturization ODU transmission channel circuit |
-
2013
- 2013-12-31 CN CN201320889952.4U patent/CN203708198U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150214A (en) * | 2018-10-12 | 2019-01-04 | 南京屹信航天科技有限公司 | A kind of miniaturization ODU transmission channel circuit |
| CN109150214B (en) * | 2018-10-12 | 2024-05-28 | 南京屹信航天科技有限公司 | Miniaturized ODU emission channel circuit |
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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: 20140709 |
|
| CX01 | Expiry of patent term |