CN105305969B - The double balanced mixer of ultra wide band intermediate frequency - Google Patents
The double balanced mixer of ultra wide band intermediate frequency Download PDFInfo
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- CN105305969B CN105305969B CN201510867073.5A CN201510867073A CN105305969B CN 105305969 B CN105305969 B CN 105305969B CN 201510867073 A CN201510867073 A CN 201510867073A CN 105305969 B CN105305969 B CN 105305969B
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- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 241000237858 Gastropoda Species 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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Abstract
The present invention relates to a kind of frequency mixers, the specially double balanced mixer of ultra wide band intermediate frequency, it is sequentially connected including the first balun, the second balun and positive and negative anodes by four diodes and forms diode bridge, 2 points of 1 point of the midpoint of first balun and another midpoint are grounded respectively, and capacitance resistance parallel resonance structure is connected between 2 points of 1 point of the midpoint of the first balun and another midpoint.The double balanced mixer of ultra wide band intermediate frequency provided by the invention, 1 point of midpoint is directly grounded, and capacitance resistance parallel resonance structure is introduced between 2 points of 1 point of midpoint and another midpoint to eliminate the influence of the prior art, the electrical property for improving frequency mixer increases the intermediate-frequency bandwidth of double balanced mixer.
Description
Technical field
The present invention relates to a kind of frequency mixers, the specially double balanced mixer of ultra wide band intermediate frequency.
Background technique
Usual double balanced mixer uses snail coupling line balun, and basic structure is as shown in Figure 1, include a pair of of balun
And diode bridge, wherein there is signal input part 1 in the first balun, 2 points of midpoint ground connection, 1 point of midpoint by one section of microstrip line with
2 points of midpoint is connected to be grounded, and the parasitic parameter that this section of microstrip line introduces can deteriorate the electrical property of frequency mixer.But if
1 point of midpoint is directly grounded without one section of transmission line, can not solve the bandwidth problem of intermediate-frequency bandwidth.
Summary of the invention
In view of the above technical problems, the present invention proposes a kind of double balanced mixer of ultra wide band intermediate frequency, in solution
The bandwidth problem of bandwidth simultaneously, solves the problems, such as that existing mixer intermediate-frequency bandwidth is not wide enough；
Specific technical solution is the double balanced mixer of ultra wide band intermediate frequency, including the first balun, the second balun and
It is sequentially connected by the positive and negative anodes of four diodes and forms diode bridge, 1 point of the midpoint of the first balun and another midpoint 2 points minutes
It is not grounded, capacitance resistance parallel resonance structure is connected between 2 points of 1 point of the midpoint of the first balun and another midpoint.
The double balanced mixer of ultra wide band intermediate frequency provided by the invention, 1 point of midpoint are directly grounded, and at midpoint 1
Capacitance resistance parallel resonance structure is introduced between 2 points of point and another midpoint to eliminate the influence of the prior art, is improved mixed
The electrical property of frequency device increases the intermediate-frequency bandwidth of double balanced mixer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the prior art；
Fig. 2 is structural schematic diagram of the invention.
Specific embodiment
A specific embodiment of the invention is described with reference to the drawings.
As shown in Fig. 2, the double balanced mixer of ultra wide band intermediate frequency, including the first balun, the second balun and by four
The positive and negative anodes of diode are sequentially connected composition diode bridge, and 1 point of the midpoint of the first balun is grounded, in 1 point of midpoint and another
Capacitance resistance parallel resonance structure is connected between 2 points of point.
The positive and negative anodes of four diodes D1, D2, D3, D4 are sequentially connected, and form a loop or diode bridge.Signal 1
It is inputted from the first balun signal input part 1, signal is divided into size is identical, difference of phase phase difference 180 degree is believed through the first balun
Number, the junction D1, D2 and the junction D3, D4 of diode bridge is added.Signal 2 is inputted from the signal input part 2 of the second balun,
Signal is divided into size is identical, differential signal of phase phase difference 180 degree through the second balun, D1, D4 that diode bridge is added connect
Connect place and the junction D2, D3.Difference frequency is drawn with frequency signal from the midpoint of the second balun.
When the characteristic of four diodes D1, D2, D3, D4 are identical, Compositional balance electric bridge connects D1, D2 of electric bridge
The signal of place and the junction D3, D4 will not occur in the junction D1, D4 and the junction D2, D3.Similarly for the junction D1, D4 and
The signal of the junction D2, D3 will not occur in the junction D1, D2 and the junction D3, D4.Therefore double balanced mixer has itself
Isolation with higher.Simultaneously as the nonlinear characteristic of diode, work of two groups of differential signals in ring diode electric bridge
Less clutter component, the odd harmonic point of the odd harmonic component ± signal 2 for only having signal 1 of output can be obtained under
Amount, to complete the processing of the difference or sum for two signal frequencies under the premise of causing less spuious.
For balun circuit used in frequency mixer, realized in the form of coupled microstrip line.This kind of mode is by balun
Single-ended coil and difference coil realize the single-ended transfer difference of microwave signal in the form that same plane couples.In the process of realization
In, in order to guarantee that the phase difference of output signal provides the neutral earthing of difference coil to output signal close to 180 degree
One reference zero.
Claims (1)
1. the double balanced mixer of ultra wide band intermediate frequency, including the first balun, the second balun and by the positive and negative of four diodes
Pole is sequentially connected composition diode bridge, which is characterized in that and 2 points of 1 point of the midpoint of the first balun and another midpoint are grounded respectively,
Capacitance resistance parallel resonance structure is connected between 2 points of 1 point of the midpoint of first balun and another midpoint；
The positive and negative anodes of four diodes D1, D2, D3, D4 are sequentially connected, and form a loop or diode bridge；Signal 1 is from
Signal, is divided into that size is identical, differential signal of phase phase difference 180 degree through the first balun by the input of one balun signal input part 1, is added
Enter the junction D1, D2 and the junction D3, D4 of diode bridge；Signal 2 is inputted from the signal input part 2 of the second balun, through the
Signal is divided into that size is identical, differential signal of phase phase difference 180 degree by two baluns, and the junction D1, D4 of diode bridge is added
And the junction D2, D3；Difference frequency is drawn with frequency signal from the midpoint of the second balun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510867073.5A CN105305969B (en) | 2015-12-01 | 2015-12-01 | The double balanced mixer of ultra wide band intermediate frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510867073.5A CN105305969B (en) | 2015-12-01 | 2015-12-01 | The double balanced mixer of ultra wide band intermediate frequency |
Publications (2)
| Publication Number | Publication Date |
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| CN105305969A CN105305969A (en) | 2016-02-03 |
| CN105305969B true CN105305969B (en) | 2019-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510867073.5A Active CN105305969B (en) | 2015-12-01 | 2015-12-01 | The double balanced mixer of ultra wide band intermediate frequency |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508557A (en) * | 2017-08-24 | 2017-12-22 | 中国电子科技集团公司第四十研究所 | One kind is based on the passive double balanced mixer of multilayer microstrip balun |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286815A (en) * | 1997-11-18 | 2001-03-07 | 艾利森公司 | Compact antenna feed circuits |
| CN201430202Y (en) * | 2009-01-20 | 2010-03-24 | 深圳市麦捷微电子科技股份有限公司 | Laminated sheet type Balun band-pass filter |
| CN102163954A (en) * | 2011-01-30 | 2011-08-24 | 东南大学 | Low-voltage low-noise wideband mixer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8498604B2 (en) * | 2010-06-22 | 2013-07-30 | Hittite Microwave Corporation | Double balanced mixer |
-
2015
- 2015-12-01 CN CN201510867073.5A patent/CN105305969B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1286815A (en) * | 1997-11-18 | 2001-03-07 | 艾利森公司 | Compact antenna feed circuits |
| CN201430202Y (en) * | 2009-01-20 | 2010-03-24 | 深圳市麦捷微电子科技股份有限公司 | Laminated sheet type Balun band-pass filter |
| CN102163954A (en) * | 2011-01-30 | 2011-08-24 | 东南大学 | Low-voltage low-noise wideband mixer |
Non-Patent Citations (1)
| Title |
|---|
| 《毫米波收发前端的研制》;杨定胜;《中国优秀硕士学位论文全文数据库》;20090430(第04期);第30页 |
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| CN105305969A (en) | 2016-02-03 |
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Effective date of registration: 20200420 Address after: 610051, No. two, section 4, Jianshe North Road, Chengdu, Sichuan, No. 1, No. 2, unit 3, No. 3, No. 2, Chenghua District Co-patentee after: Lu Jianguo Patentee after: Wang Lei Co-patentee after: Zhan Mingzhou Address before: 610051, No. two, section 4, Jianshe North Road, Chengdu, Sichuan, No. 1, No. 2, unit 3, No. 3, No. 2, Chenghua District Patentee before: Wang Lei |
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