CN204375900U - A kind of balance/imbalance impedance transducer - Google Patents
A kind of balance/imbalance impedance transducer Download PDFInfo
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- CN204375900U CN204375900U CN201520082508.0U CN201520082508U CN204375900U CN 204375900 U CN204375900 U CN 204375900U CN 201520082508 U CN201520082508 U CN 201520082508U CN 204375900 U CN204375900 U CN 204375900U
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Abstract
A kind of balance/imbalance impedance transducer, it comprises the nickel-zinc ferrite soft magnetic bodies magnet ring (1) that a specification is race diameter 31mm × inner ring diameter 18mm × thickness 7mm, three sizes are diameter 1.2mm high strength enamelled wire (2), described three high strength enamelled wires (2) of described nickel-zinc ferrite soft magnetic bodies magnet ring (1) upper winding side by side 5 circle, described three high strength enamelled wires (2) are respectively a, b, c line, their coiling top correspondence is respectively A, B, C holds, coiling end correspondence is respectively A1, B1, C1 holds, C end is many around Liang Quan along its direction of winding, A1 end is many around Liang Quan along its direction of winding, and C end is held weld together with A1, A end, C1 end connect the balance end that impedance is 600 Ω, and B end, B1 termination impedance are the imbalance end of 50 Ω.The utility model has the advantage of: frequency of utilization scope is very wide; Opposite band is roomy; Volume little makings is simple.
Description
Technical field
The utility model relates to balance/imbalance impedance transducer.
Background technology
Intermediate waves feeder form is varied, and except indivedual low-powered transmitter adopts coaxial feed, major part is all adopt built on stilts parallel wire or its distortion feed, is that is all generally adopt balanced feeder line.But the testing equipment of the overwhelming majority such as vector network analyzer all adopts coaxial interface to test.The characteristic impedance of most of feeder is all 300 Ω in addition, and tester is all the characteristic impedance of 50 Ω.Therefore just need a balance/imbalance impedance transducer when measuring and adjust antenna, conversion and coupling will be completed simultaneously in the 10 frequency multiplication broadbands of 3MHz-30MHz.According to actual needs, the development of balance/imbalance impedance transducer is carried out.
Balance/imbalance impedance converter circuit generally has high frequency Method and Open, line transformer and high frequency transformer these three kinds.
The first is high frequency Method and Open, adds the sleeve of λ/4 wavelength at the crust of transmission cable screen.The radiation current of former crust can be offset like this.The reactance X of access, the impedance flexible due to λ/4 is infinitely great, is considered as open circuit, on this frequency without impact, achieves the conversion of balance/imbalance.But this method bandwidth of operation is very narrow, when frequency is low, wavelength sleeve in λ/4 just seems oversize, applies when being only suitable for the conversion of high-power arrowband.
The second is line transformer.Line transformer is made up of on magnetic core transmission line (twisted pair, three lines or coaxial line etc.), thus can be considered as is the product that lumped parameter transformer and distributed constant transmission line impedance converter combine, it had both absorbed distributed constant line transformer in the strong point of high-frequency work, can maintain again the feature that lumped parameter transformer size is little, opposite band is roomy.Therefore line transformer has following three features:
1. frequency of utilization scope is very wide, and lower frequency limit is at tens below kHz, and upper limiting frequency is relevant with concrete variation, reaches as high as a few GHz.
2. opposite band is roomy, is typically about 9 frequencys multiplication.
3. volume little makings is simple.
Because line transformer frequency band is wide especially, therefore wide band transformer can be used as, the double effect doing impedance transformation and balance/imbalance conversion.But line transformer also has following shortcoming:
1. the impedance transformation of the general only suitable Low ESR (below hundreds of ohms) of line transformer.Because high impedance conversion requires to adopt the coiling of high-impedance behavior transmission line, and high characteristic impedance transmission line will bring many troubles, such as size is large, frequency band is narrow, upper limiting frequency is low.
2. line transformer can give full play to the strong point of its bandwidth for the conversion that impedance ratio is integer duplicate ratio, and more difficult for the conversion ratio of non-integer duplicate ratio.
Line transformer has two kinds of basic structures substantially, one be transmission line around on magnetic core, another kind be by magnetic core cover on the transmission line.For front a kind of structure, self distributed capacitance and the port electric capacity of transmission line winding still exist, therefore upper limiting frequency is restricted.Then plant and have certain difficulty in making.
The third is high frequency transformer.For ideal transformer, the pass of input impedance and output impedance is R
1/ R
2=(N
1/ N
2)
2, by regulating the primary and secondary number of turns than just realizing specific impedance transformation.High frequency transformer is generally divided into core transformers and air-core transformer.Air-core transformer leakage field is comparatively large, and coupling pine, owing to not having core loss, can be operated in higher frequency.Core transformers coupling is tight, and leakage field is few, and coupling coefficient is similar to 1, and volume is also little.But along with the rising of operating frequency, core loss strengthens, distributed constant and port electric capacity increase, and circuit becomes inductance capacitance coupling from inductance coupling high.
The relation of at this moment input impedance and output impedance not only with the primary and secondary number of turns than relevant, also with distributed capacitance C
0relevant.Select the magnetic core of suitable number of turns ratio and high magnetic permeability to ensure the coupling of low-frequency range during actual fabrication, then reach coupling requirement with wire diameter and winding method to control distributed constant at high band.
In sum, due to the balance/imbalance impedance transducer operating frequency low (3-30MHz) that will develop, power little (apparatus measures use), working band wide (10 frequency multiplication), have the functions such as impedance transformation concurrently, be therefore applicable to adopting high frequency transformer or line transformer.What adopt in the utility model is high frequency transformer.
In addition, current ferroxcube mainly contains manganese-zinc ferrite and nickel-zinc ferrite two kinds.Wherein to have magnetic permeability high for manganese-zinc ferrite, and the characteristics such as quality factor are good, belong to spinel structure.Manganese-zinc ferrite frequency of utilization is generally at below 2MHz.Manganese-zinc ferrite has power-type and height to lead dividing of ferrite.Nickel-zinc ferrite has spinel structure.In low-frequency range performance not as manganese-zinc ferrite, the initial permeability of nickel-zinc ferrite is less than MnZn ferrite, but is greatly better than manganese-zinc ferrite in its performance of high band.It can thus be appreciated that NiZn ferrite should be adopted as the magnetic core of balance/imbalance impedance transducer.
Summary of the invention
The purpose of this utility model is exactly will for the defect existed in prior art, a kind of balance/imbalance impedance transducer is provided, it can realize providing a balance/imbalance impedance transducer equipment when measuring and adjust antenna, will complete conversion and coupling in the 10 frequency multiplication broadbands of 3MHz-30MHz simultaneously.
For achieving the above object, technical solutions of the utility model are as follows: a kind of balance/imbalance impedance transducer, described transducer comprises the nickel-zinc ferrite soft magnetic bodies magnet ring 1 that a specification is race diameter 31mm × inner ring diameter 18mm × thickness 7mm, three sizes are diameter 1.2mm high strength enamelled wire 2, described nickel-zinc ferrite soft magnetic bodies magnet ring 1 is wound around 5 circle described three high strength enamelled wires 2 side by side, described three high strength enamelled wires 2 are respectively a, b, c line, their coiling top correspondence is respectively A, B, C holds, coiling end correspondence is respectively A1, B1, C1 holds, C end is many around Liang Quan along its direction of winding, A1 end is many around Liang Quan along its direction of winding, and C end is held weld together with A1, A end, C1 end connect the balance end that impedance is 600 Ω, and B end, B1 termination impedance are the imbalance end of 50 Ω.
The utility model has the advantage of: frequency of utilization scope is very wide, lower frequency limit is at tens below kHz, and upper limiting frequency is relevant with concrete variation, reaches as high as a few GHz; Opposite band is roomy; Volume little makings is simple.
Accompanying drawing explanation
Fig. 1 is the structural representation of balance/imbalance impedance transducer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, a kind of balance/imbalance impedance transducer, described transducer comprises the nickel-zinc ferrite soft magnetic bodies magnet ring 1 that a specification is race diameter 31mm × inner ring diameter 18mm × thickness 7mm, three sizes are diameter 1.2mm high strength enamelled wire 2, described nickel-zinc ferrite soft magnetic bodies magnet ring 1 is wound around 5 circle described three high strength enamelled wires 2 side by side, described three high strength enamelled wires 2 are respectively a, b, c line, their coiling top correspondence is respectively A, B, C holds, coiling end correspondence is respectively A1, B1, C1 holds, C end is many around Liang Quan along its direction of winding, A1 end is many around Liang Quan along its direction of winding, and C end is held weld together with A1, A end, C1 end connect the balance end that impedance is 600 Ω, and B end, B1 termination impedance are the imbalance end of 50 Ω.
The utility model is when reality uses, can adopt and carry out wiring with the following method, A, C1 termination balanced signal equipment, B, B1 hold the heart yearn end of one end earth terminal, another terminated cable, are achieved the bi-directional conversion of balanced signal and unbalanced signal by this balance/imbalance impedance transducer.
This balance/imbalance impedance transducer of the present utility model be for adjustment test days feeder line time and instrument connect use, the advantage of said structure is adopted to be that its frequency of utilization scope is very wide, lower frequency limit is at tens below kHz, and upper limiting frequency is relevant with concrete variation, reaches as high as a few GHz; Opposite band is roomy; Volume little makings is simple.
Claims (1)
1. a balance/imbalance impedance transducer, it is characterized in that: described transducer comprises the nickel-zinc ferrite soft magnetic bodies magnet ring (1) that a specification is race diameter 31mm × inner ring diameter 18mm × thickness 7mm, three sizes are diameter 1.2mm high strength enamelled wire (2), described three high strength enamelled wires (2) of described nickel-zinc ferrite soft magnetic bodies magnet ring (1) upper winding side by side 5 circle, described three high strength enamelled wires (2) are respectively a, b, c line, their coiling top correspondence is respectively A, B, C holds, coiling end correspondence is respectively A1, B1, C1 holds, C end is many around Liang Quan along its direction of winding, A1 end is many around Liang Quan along its direction of winding, and C end is held weld together with A1, A end, C1 end connect the balance end that impedance is 600 Ω, and B end, B1 termination impedance are the imbalance end of 50 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082508.0U CN204375900U (en) | 2015-02-05 | 2015-02-05 | A kind of balance/imbalance impedance transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520082508.0U CN204375900U (en) | 2015-02-05 | 2015-02-05 | A kind of balance/imbalance impedance transducer |
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| Publication Number | Publication Date |
|---|---|
| CN204375900U true CN204375900U (en) | 2015-06-03 |
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ID=53332090
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520082508.0U Expired - Fee Related CN204375900U (en) | 2015-02-05 | 2015-02-05 | A kind of balance/imbalance impedance transducer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938931A (en) * | 2016-02-29 | 2016-09-14 | 中国电力科学研究院 | Balanced unbalanced transformer and design method thereof |
| CN109494967A (en) * | 2018-12-12 | 2019-03-19 | 上海埃德电子股份有限公司 | Unbalanced-balanced conversion device and balanced-unbalanced transformer |
| CN113381155A (en) * | 2021-06-23 | 2021-09-10 | 中国电子科技集团公司第九研究所 | Wide-temperature broadband low-resistance conversion surface-mounted power synthesizer |
-
2015
- 2015-02-05 CN CN201520082508.0U patent/CN204375900U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938931A (en) * | 2016-02-29 | 2016-09-14 | 中国电力科学研究院 | Balanced unbalanced transformer and design method thereof |
| CN109494967A (en) * | 2018-12-12 | 2019-03-19 | 上海埃德电子股份有限公司 | Unbalanced-balanced conversion device and balanced-unbalanced transformer |
| CN109494967B (en) * | 2018-12-12 | 2021-03-05 | 上海埃德电子股份有限公司 | Unbalanced-balanced converter and balanced-unbalanced converter |
| CN113381155A (en) * | 2021-06-23 | 2021-09-10 | 中国电子科技集团公司第九研究所 | Wide-temperature broadband low-resistance conversion surface-mounted power synthesizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20150603 Termination date: 20160205 |