CN110061700A - A kind of frequency mixer - Google Patents
A kind of frequency mixer Download PDFInfo
- Publication number
- CN110061700A CN110061700A CN201910317534.XA CN201910317534A CN110061700A CN 110061700 A CN110061700 A CN 110061700A CN 201910317534 A CN201910317534 A CN 201910317534A CN 110061700 A CN110061700 A CN 110061700A
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- China
- Prior art keywords
- frequency mixer
- frequency
- power splitter
- output
- combiner
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- 230000010355 oscillation Effects 0.000 claims abstract description 13
- 230000002265 prevention Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
Abstract
The invention discloses a kind of frequency mixers, belong to IC design field, including the first frequency mixer, the second frequency mixer, the first power splitter for inputting local oscillation signal, the second power splitter for inputting intermediate-freuqncy signal and the combiner for exporting radiofrequency signal；Two output ends of the first power splitter are connect with the local oscillator end at the local oscillator end of the first frequency mixer and the second frequency mixer respectively, two output ends of the second power splitter are connect with the intermediate frequency end at the intermediate frequency end of the first frequency mixer and the second frequency mixer respectively, the input terminal connection of the RF output end and combiner of the RF output end of the first frequency mixer and the second frequency mixer.Local oscillation signal leaks into the prevention at radio-frequency port of frequency mixer after power splitter paraphase, is 180 ° of difference in phase, after offsetting a part in amplitude, exports using 0 ° of combiner, reduces local oscillator leakage signals amplitude.
Description
Technical field
The present invention relates to IC design technical field, in particular to a kind of frequency mixer.
Background technique
Currently, in microwave regime, frequency mixer is a kind of very widely used microwave device, be let us say that, as long as
It is microwave component, it is most of to need mixting circuit, then frequency mixer is exactly one of essential component.
In recent years, with the extensive use of frequency mixer, function and index request to frequency mixer are also increasingly stringenter, in the past
The leakage of common frequency mixer all unavoidable local oscillation signal in use.Corresponding solution is usually after mixting circuit
Add filter circuit, not only increase design cost, and also brings very big pressure in space layout.
Summary of the invention
The purpose of the present invention is to provide a kind of frequency mixers, to reduce local oscillator leakage signals amplitude.
In order to achieve the above object, using a kind of frequency mixer, comprising: the first frequency mixer, the second frequency mixer, for inputting local oscillator
First power splitter of signal, the second power splitter for inputting intermediate-freuqncy signal and the combiner for exporting radiofrequency signal；
Two output ends of the first power splitter are connect with the local oscillator end at the local oscillator end of the first frequency mixer and the second frequency mixer respectively, and second
Two output ends of power splitter are connect with the intermediate frequency end at the intermediate frequency end of the first frequency mixer and the second frequency mixer respectively, the first frequency mixer
The input terminal of the RF output end and combiner of RF output end and the second frequency mixer connects.
Further, first power splitter and the second power splitter are 0 °/180 ° power splitters.
Further, the combiner is 0 ° of power splitter.
Further, the local oscillator end of 0 ° of output second frequency mixer of termination of first power splitter, the first power splitter
The local oscillator end of 180 ° of output first frequency mixers of termination；
The intermediate frequency end of 0 ° of output second frequency mixer of termination of second power splitter, 180 ° of outputs termination first of the second power splitter
The intermediate frequency end of frequency mixer.
Compared with prior art, there are following technical effects by the present invention: the present invention, which utilizes, uses centimetre two-way phase phase difference
Two power splitters of 180 ° of signals, two power splitters are respectively used to input local oscillation signal and intermediate-freuqncy signal, and the two of two power splitters
Road output end connects the first frequency mixer and the second frequency mixer respectively, is then exported the first frequency mixer using one 0 ° of combiner
Mixed frequency signal and mixed batch of signal synthesis of the second frequency mixer output signal exports all the way.Local oscillation signal, intermediate-freuqncy signal pass through respectively
After crossing two power splitters, local oscillator, intermediate-freuqncy signal are distinguished 180 ° of paraphase and are mixed again, the radio frequency that the power splitter after being mixed in this way through 0 ° exports
Signal is same phase in phase with the intermediate-freuqncy signal before paraphase, but local oscillation signal leaks into frequency mixer after power splitter paraphase
Prevention at radio-frequency port is 180 ° of difference in phase, after offsetting a part in amplitude, exports using 0 ° of combiner, reduces local oscillator
Leakage signal amplitude.
Detailed description of the invention
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail:
Fig. 1 is a kind of structural schematic diagram of frequency mixer.
Specific embodiment
In order to further explain feature of the invention, reference should be made to the following detailed description and accompanying drawings of the present invention.Institute
Attached drawing is only for reference and purposes of discussion, is not used to limit protection scope of the present invention.
As shown in Figure 1, present embodiment discloses a kind of frequency mixers, comprising: the first frequency mixer 11, is used second frequency mixer 12
In the first power splitter 21 of input local oscillation signal, the second power splitter 22 for inputting intermediate-freuqncy signal and for exporting radio frequency letter
Number combiner 23；
Two output ends of the first power splitter 21 connect with the local oscillator end of the first frequency mixer 11 and the local oscillator end of the second frequency mixer 12 respectively
It connects, two output ends of the second power splitter 22 connect with the intermediate frequency end of the first frequency mixer 11 and the intermediate frequency end of the second frequency mixer 12 respectively
It connects, the RF output end of the RF output end of the first frequency mixer 11 and the second frequency mixer 12 is connect with the input terminal of combiner 23.
Further, first power splitter 21 and the second power splitter 22 are 0 °/180 ° power splitters.That is the first power splitter
12 and second power splitter 22 for being divided into 180 ° of signals of two-way phase phase difference.
Further, the combiner is 0 ° of combiner.
Further, the local oscillator end of 0 ° of output second frequency mixer of termination of first power splitter, the first power splitter
The local oscillator end of 180 ° of output first frequency mixers of termination；The intermediate frequency end of 0 ° of output second frequency mixer of termination of second power splitter,
The intermediate frequency end of 180 ° of output first frequency mixers of termination of the second power splitter.
It should be noted that microwave local oscillation (LO) signal inputs the first power splitter 21；Microwave intermediate frequency (IF) signal input the
Two power splitters 22；The combiner 23 of microwave radio (IF) the signal input of first frequency mixer 11 and the output of the second frequency mixer 12.
Microwave local signal is inputted from the first power splitter 21, exports 180 ° of roads respectively to 0 ° of the first frequency mixer 11, output road
To the second frequency mixer 12；Microwave intermediate-freuqncy signal is inputted from the second power splitter 22, exports 180 ° of roads respectively to the first frequency mixer 11, defeated
0 ° of road exports after being mixed in the second frequency mixer 12 to 0 ° of road of 12. local oscillation signal of the second frequency mixer and 0 ° of road of intermediate-freuqncy signal out
0 ° of radiofrequency signal, 180 ° of roads of local oscillation signal and 180 ° of roads of intermediate-freuqncy signal export 360 ° after being mixed in the first frequency mixer 11
Radiofrequency signal (export 0 ° of radiofrequency signal)；Two-way radiofrequency signal after combiner 23, the radiofrequency signal of final output with
The intermediate-freuqncy signal inputted before is consistent in phase.But for local oscillation signal, leaks into and penetrate by the first frequency mixer 11
Frequency road is 180 ° of signal, and leak into radio frequency road by the second frequency mixer 12 is 0 ° of signal, the sheet of two frequency mixers output
It shakes leakage signal opposite in phase (differing 180 °), after the synthesis of combiner 23, the local oscillation signal of the prevention at radio-frequency port of leakage, amplitude
On can offset a part, compared with conventional frequency mixer, greatly optimized in amplitude, optimal value about 20dB.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of frequency mixer characterized by comprising the first frequency mixer, the second frequency mixer, first for inputting local oscillation signal
Power splitter, the second power splitter for inputting intermediate-freuqncy signal and the combiner for exporting radiofrequency signal；
Two output ends of the first power splitter are connect with the local oscillator end at the local oscillator end of the first frequency mixer and the second frequency mixer respectively, and second
Two output ends of power splitter are connect with the intermediate frequency end at the intermediate frequency end of the first frequency mixer and the second frequency mixer respectively, the first frequency mixer
The input terminal of the RF output end and combiner of RF output end and the second frequency mixer connects.
2. frequency mixer as described in claim 1, which is characterized in that first power splitter and the second power splitter be 0 °/
180 ° of power splitters.
3. frequency mixer as claimed in claim 2, which is characterized in that the combiner is 0 ° of power splitter.
4. frequency mixer as claimed in claim 3, which is characterized in that 0 ° of output of first power splitter terminates the second frequency mixer
Local oscillator end, the local oscillator end of 180 ° of the first power splitter output the first frequency mixers of termination；
The intermediate frequency end of 0 ° of output second frequency mixer of termination of second power splitter, 180 ° of outputs termination first of the second power splitter
The intermediate frequency end of frequency mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317534.XA CN110061700A (en) | 2019-04-19 | 2019-04-19 | A kind of frequency mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317534.XA CN110061700A (en) | 2019-04-19 | 2019-04-19 | A kind of frequency mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110061700A true CN110061700A (en) | 2019-07-26 |
Family
ID=67319596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910317534.XA Pending CN110061700A (en) | 2019-04-19 | 2019-04-19 | A kind of frequency mixer |
Country Status (1)
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| CN (1) | CN110061700A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547177A (en) * | 2009-04-14 | 2009-09-30 | 中国科学技术大学 | Ultra-wideband two phase PSK transmitter with balance structure and method |
| CN205509978U (en) * | 2016-03-28 | 2016-08-24 | 合肥星波通信股份有限公司 | Can reduce transmission up -conversion in -band combination heterogeneous mixer circuit |
| CN106301231A (en) * | 2015-05-12 | 2017-01-04 | 中国计量科学研究院 | A kind of local oscillator noise counteracting method and circuit |
| CN209823714U (en) * | 2019-04-19 | 2019-12-20 | 合肥星波通信技术有限公司 | Frequency mixer |
-
2019
- 2019-04-19 CN CN201910317534.XA patent/CN110061700A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101547177A (en) * | 2009-04-14 | 2009-09-30 | 中国科学技术大学 | Ultra-wideband two phase PSK transmitter with balance structure and method |
| CN106301231A (en) * | 2015-05-12 | 2017-01-04 | 中国计量科学研究院 | A kind of local oscillator noise counteracting method and circuit |
| CN205509978U (en) * | 2016-03-28 | 2016-08-24 | 合肥星波通信股份有限公司 | Can reduce transmission up -conversion in -band combination heterogeneous mixer circuit |
| CN209823714U (en) * | 2019-04-19 | 2019-12-20 | 合肥星波通信技术有限公司 | Frequency mixer |
Non-Patent Citations (1)
| Title |
|---|
| 张琼: "60GHz毫米波短距通信的若干问题研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》, 15 January 2011 (2011-01-15), pages 4 - 4 * |
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