CN204231301U - A kind of low temperature broadband low noise amplifier - Google Patents
A kind of low temperature broadband low noise amplifier Download PDFInfo
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- CN204231301U CN204231301U CN201420759238.8U CN201420759238U CN204231301U CN 204231301 U CN204231301 U CN 204231301U CN 201420759238 U CN201420759238 U CN 201420759238U CN 204231301 U CN204231301 U CN 204231301U
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Abstract
The utility model discloses a kind of low temperature broadband low noise amplifier, comprise: for reducing the input matching circuit of field-effect transistor FET input return loss and noise in broadband, the intervalve matching circuit for making low temperature broadband low noise amplifier produce flat-high-gain, and in broadband, export the output matching circuit of return loss for reducing FET; Wherein, described input matching circuit, intervalve matching circuit are connected successively with output matching circuit.By adopting amplifier disclosed in the utility model, not only can ensure steady operation at low ambient temperatures, and in the broadband of 3.5-8GHz, amplifier can reach the gain of 25dB, simultaneously gain flatness is less than 2dB, and ensure the noise of amplifier and return loss enough low in broadband.
Description
Technical field
The utility model relates to microwave amplifier technical field, particularly relates to a kind of low temperature broadband low noise amplifier.
Background technology
Microwave amplifier is very important part in modern radio-frequency, microwave system, and reactatron belongs to the important component part of receiving equipment front end, and its overall noise of noise inhibiting ability to receiver plays conclusive effect.
Along with the development of science and technology, reactatron also proposes requirement to wider frequency band and larger more smooth gain.Special in semiconductor-quantum-point field, especially for being measured in the experiment of quantum dot signal by chamber, require that circuit system people works under the low temperature environment of pole, simultaneously because the signal of quantum dot is very faint, at this moment just require that amplifier can restraint speckle provide enough large gain to amplify quantum dot signal as much as possible; And alter a great deal due to the resonance frequency of different cavity, just need amplifier to have bandwidth large as far as possible.
Current low noise amplifier due to power consumption excessive, can not work at low temperatures, or working band is narrow, or noise inhibiting ability can not to reach requirement, or the reason such as gain is inadequate and can not being used in quantum dot experiments of measuring.
Utility model content
The purpose of this utility model is to provide a kind of low temperature broadband low noise amplifier, can realize noise suppressed in broadband at low temperatures and signal amplifies.
The purpose of this utility model is achieved through the following technical solutions:
A kind of low temperature broadband low noise amplifier, comprising:
For reducing the input matching circuit of field-effect transistor FET input return loss and noise in broadband, the intervalve matching circuit for making low temperature broadband low noise amplifier produce flat-high-gain, and in broadband, export the output matching circuit of return loss for reducing FET;
Wherein, described input matching circuit, intervalve matching circuit are connected successively with output matching circuit.
Further, described input matching circuit comprises: input signal source, resistance R5, a lange coupler lange1 and 8 microstrip line ML6-ML13;
Wherein, described signal input sources, microstrip line ML6 connect successively with 1 port of lange coupler lange1, resistance R5, microstrip line ML7 connect successively with 2 ports of lange coupler lange1,3 ports of lange coupler lange2 are connected with microstrip line ML8,4 ports of lange coupler lange2 are connected with microstrip line ML9, microstrip line ML8, ML10 and ML11 are linked together by cross interface Cross1, and microstrip line ML9, ML12 and ML13 are linked together by Cross2.
Further, described intervalve matching circuit comprises: 6 biasing circuit T1-T6 and 6 microstrip line ML14-ML19;
Wherein, biasing circuit T1, microstrip line ML14, biasing circuit T3 connect successively with biasing circuit T5, biasing circuit T2, microstrip line ML15, biasing circuit T4 connect successively with biasing circuit T6, microstrip line ML14, ML16 and biasing circuit T3 are linked together by T-shaped interface Tee3, microstrip line ML15, ML17 and biasing circuit T4 are linked together by Tee4, microstrip line ML18, biasing circuit T3 and T5 are linked together by Tee5, and microstrip line ML19, biasing circuit T4 and T6 are linked together by Tee6.
Further, described biasing circuit comprises: 4 resistance R1-R4,8 electric capacity C1-C8, inductance L 1, back bias voltage voltage source, positive bias voltage source, 5 microstrip line ML1-ML5, and HJ-FET transistor;
Wherein, described back bias voltage voltage source, resistance R1 and R2 connect successively, and electric capacity C1, microstrip line ML1 connect successively with the G pole of HJ-FET transistor; One end of resistance R3 is connected between resistance R1 and R2, and the other end is connected with the Tee1 between electric capacity C1 and microstrip line ML1; HJ-FET transistor D pole, microstrip line ML2 connect successively with electric capacity C2, resistance R4, microstrip line ML3, inductance L 1 are connected successively, inductance L 1 is also connected with the Tee2 between microstrip line ML2 with electric capacity C2, electric capacity C5, C6, C7, C8 and positive bias voltage source earth successively, electric capacity C3 and C4 is connected in parallel between resistance R4 and microstrip line ML3, and ground connection; Microstrip line ML4 and ML5 is in parallel, one end ground connection, the S pole of another termination HJ-FET.
Further, described output matching circuit comprises: signal output part, resistance R6, lange coupler lange2,2 fan-shaped offset of microstrip line Stu1-Stu2, and 6 microstrip line ML20-ML25;
Wherein, described fan-shaped offset of microstrip line Stu1, microstrip line ML20 and ML22 are linked together by Cross3, and microstrip line ML22 also connects with 1 port of lange coupler lange2; Fan-shaped offset of microstrip line Stu2, microstrip line ML21 and ML23 are linked together by Cross3, and microstrip line ML23 also connects with 2 ports of lange coupler lange2; 3 ports, the microstrip line ML24 of lange coupler lange2 connect successively with resistance R6, and 4 ports, the microstrip line ML25 of lange coupler lange2 connect successively with signal output part.
Further, signal input sources and signal output part all adopt sub-miniature A connector.
The technical scheme provided as can be seen from above-mentioned the utility model, this programme comprises input matching circuit, intervalve matching circuit and output matching circuit; Wherein, input matching circuit employing lange coupler and microstrip circuit coupling, energy is restraint speckle and reduction return loss fully; Intervalve matching circuit passes through selection and the inter-stage microstrip line coupling of HJ-FET working point, makes the gain that amplifier is large and smooth in broadband, and controls power consumption, can work at low temperatures; Output matching circuit adopts lange coupler and microstrip circuit coupling, can effectively reduce return loss.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
The circuit diagram of a kind of low temperature broadband low noise amplifier that Fig. 1 provides for the utility model embodiment;
The circuit diagram of a kind of biasing circuit that Fig. 2 provides for the utility model embodiment;
The experiment measuring figure of the amplifier amplifying power that Fig. 3 provides for the utility model embodiment;
The experiment measuring figure of the signal input sources return loss degree that Fig. 4 provides for the utility model embodiment;
The experiment measuring figure of the signal output part return loss degree that Fig. 5 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to protection range of the present utility model.
Embodiment
The circuit diagram of a kind of low temperature broadband low noise amplifier that Fig. 1 provides for the utility model embodiment.As shown in Figure 1, this amplifier mainly comprises:
For reducing the input matching circuit of field-effect transistor FET input return loss and noise in broadband, the intervalve matching circuit for making low temperature broadband low noise amplifier produce flat-high-gain, and in broadband, export the output matching circuit of return loss for reducing FET;
Wherein, described input matching circuit, intervalve matching circuit are connected successively with output matching circuit.
Further, described input matching circuit comprises: input signal source, resistance R5, a lange coupler lange1 and 8 microstrip line ML6-ML13;
Wherein, described signal input sources, microstrip line ML6 connect successively with 1 port of lange coupler lange1, resistance R5, microstrip line ML7 connect successively with 2 ports of lange coupler lange1,3 ports of lange coupler lange2 are connected with microstrip line ML8,4 ports of lange coupler lange2 are connected with microstrip line ML9, microstrip line ML8, ML10 and ML11 are linked together by Cross1 (cross interface), and microstrip line ML9, ML12 and ML13 are linked together by Cross2.
Further, described intervalve matching circuit comprises: 6 biasing circuit T1-T6 and 6 microstrip line ML14-ML19;
Wherein, biasing circuit T1, microstrip line ML14, biasing circuit T3 connect successively with biasing circuit T5, biasing circuit T2, microstrip line ML15, biasing circuit T4 connect successively with biasing circuit T6, microstrip line ML14, ML16 and biasing circuit T3 are linked together by Tee3 (T-shaped interface), microstrip line ML15, ML17 and biasing circuit T4 are linked together by Tee4, microstrip line ML18, biasing circuit T3 and T5 are linked together by Tee5, and microstrip line ML19, biasing circuit T4 and T6 are linked together by Tee6.
Further, described biasing circuit is for making transistor on enough low power consumption interval also can normally work at low temperatures.
Further, as shown in Figure 2, described biasing circuit mainly comprises: 4 resistance R1-R4,8 electric capacity C1-C8, inductance L 1, back bias voltage voltage source, positive bias voltage source, 5 microstrip line ML1-ML5, and heterogeneous joint field-effect transistor (HJ-FET);
Wherein, described back bias voltage voltage source, resistance R1 and R2 connect successively, and electric capacity C1, microstrip line ML1 connect successively with the G pole of HJ-FET transistor; One end of resistance R3 is connected between resistance R1 and R2, and the other end is connected with the Tee1 between electric capacity C1 and microstrip line ML1; HJ-FET transistor D pole, microstrip line ML2 connect successively with electric capacity C2, resistance R4, microstrip line ML3, inductance L 1 are connected successively, inductance L 1 is also connected with the Tee2 between microstrip line ML2 with electric capacity C2, electric capacity C5, C6, C7, C8 and positive bias voltage source earth successively, electric capacity C3 and C4 is connected in parallel between resistance R4 and microstrip line ML3, and ground connection; Microstrip line ML4 and ML5 is in parallel, one end ground connection, the S pole of another termination HJ-FET.
Further, described output matching circuit comprises: signal output part, resistance R6, lange coupler lange2,2 fan-shaped offset of microstrip line Stu1-Stu2, and 6 microstrip line ML20-ML25;
Wherein, described fan-shaped offset of microstrip line Stu1, microstrip line ML20 and ML22 are linked together by Cross3, and microstrip line ML22 also connects with 1 port of lange coupler lange2; Fan-shaped offset of microstrip line Stu2, microstrip line ML21 and ML23 are linked together by Cross3, and microstrip line ML23 also connects with 2 ports of lange coupler lange2; 3 ports, the microstrip line ML24 of lange coupler lange2 connect successively with resistance R6, and 4 ports, the microstrip line ML25 of lange coupler lange2 connect successively with signal output part.
In the low temperature broadband low noise amplifier that the utility model embodiment provides, the model of internal component can be selected according to actual conditions.Exemplary, described HJ-FET can select NE3503M04 model; Capacity cell and inductance element can select the element of the corresponding parameter of Murata company 0402 standard packaging; Resistive element can select the metalfilmresistor of the corresponding parameter of Yageo company 0402 standard packaging; HJ-FET, capacity cell, inductance element and resistive element can adopt SMT (surface installation technique) technique to be fixedly welded on dielectric-slab, dielectric-slab board selection RT6002 model, and dielectric-slab is of a size of 54.8*40.7mm; Meanwhile, described signal input sources and signal output part all adopt sub-miniature A connector.
The low temperature broadband low noise amplifier design work interval that this embodiment provides can be the S parameter of 3.5-8GHZ, device: Fig. 3 is shown in by the measured value of S21, and Fig. 4 is shown in by the measured value of S11, and Fig. 5 is shown in by the measured value of S22.Wherein S21 represents the amplifying power of amplifier, S11 and S22 represents the signal input sources of amplifier and the return loss degree of signal output part respectively, S11 and S22 is all stabilized in below-10dB, and S21 is stabilized in more than 25dB, meets design requirement.
The above; be only the utility model preferably embodiment; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claims.
Claims (6)
1. a low temperature broadband low noise amplifier, is characterized in that, comprising:
For reducing the input matching circuit of field-effect transistor FET input return loss and noise in broadband, the intervalve matching circuit for making low temperature broadband low noise amplifier produce flat-high-gain, and in broadband, export the output matching circuit of return loss for reducing FET;
Wherein, described input matching circuit, intervalve matching circuit are connected successively with output matching circuit.
2. low temperature broadband low noise amplifier according to claim 1, it is characterized in that, described input matching circuit comprises: input signal source, resistance R5, a lange coupler lange1 and 8 microstrip line ML6-ML13;
Wherein, described signal input sources, microstrip line ML6 connect successively with 1 port of lange coupler lange1, resistance R5, microstrip line ML7 connect successively with 2 ports of lange coupler lange1,3 ports of lange coupler lange2 are connected with microstrip line ML8,4 ports of lange coupler lange2 are connected with microstrip line ML9, microstrip line ML8, ML10 and ML11 are linked together by cross interface Cross1, and microstrip line ML9, ML12 and ML13 are linked together by Cross2.
3. low temperature broadband low noise amplifier according to claim 1, it is characterized in that, described intervalve matching circuit comprises: 6 biasing circuit T1-T6 and 6 microstrip line ML14-ML19;
Wherein, biasing circuit T1, microstrip line ML14, biasing circuit T3 connect successively with biasing circuit T5, biasing circuit T2, microstrip line ML15, biasing circuit T4 connect successively with biasing circuit T6, microstrip line ML14, ML16 and biasing circuit T3 are linked together by T-shaped interface Tee3, microstrip line ML15, ML17 and biasing circuit T4 are linked together by Tee4, microstrip line ML18, biasing circuit T3 and T5 are linked together by Tee5, and microstrip line ML19, biasing circuit T4 and T6 are linked together by Tee6.
4. low temperature broadband low noise amplifier according to claim 3, it is characterized in that, described biasing circuit comprises: 4 resistance R1-R4,8 electric capacity C1-C8, inductance L 1, back bias voltage voltage source, positive bias voltage source, 5 microstrip line ML1-ML5, and HJ-FET transistor;
Wherein, described back bias voltage voltage source, resistance R1 and R2 connect successively, and electric capacity C1, microstrip line ML1 connect successively with the G pole of HJ-FET transistor; One end of resistance R3 is connected between resistance R1 and R2, and the other end is connected with the Tee1 between electric capacity C1 and microstrip line ML1; HJ-FET transistor D pole, microstrip line ML2 connect successively with electric capacity C2, resistance R4, microstrip line ML3, inductance L 1 are connected successively, inductance L 1 is also connected with the Tee2 between microstrip line ML2 with electric capacity C2, electric capacity C5, C6, C7, C8 and positive bias voltage source earth successively, electric capacity C3 and C4 is connected in parallel between resistance R4 and microstrip line ML3, and ground connection; Microstrip line ML4 and ML5 is in parallel, one end ground connection, the S pole of another termination HJ-FET.
5. low temperature broadband low noise amplifier according to claim 1, it is characterized in that, described output matching circuit comprises: signal output part, resistance R6, lange coupler lange2,2 fan-shaped offset of microstrip line Stu1-Stu2, and 6 microstrip line ML20-ML25;
Wherein, described fan-shaped offset of microstrip line Stu1, microstrip line ML20 and ML22 are linked together by Cross3, and microstrip line ML22 also connects with 1 port of lange coupler lange2; Fan-shaped offset of microstrip line Stu2, microstrip line ML21 and ML23 are linked together by Cross3, and microstrip line ML23 also connects with 2 ports of lange coupler lange2; 3 ports, the microstrip line ML24 of lange coupler lange2 connect successively with resistance R6, and 4 ports, the microstrip line ML25 of lange coupler lange2 connect successively with signal output part.
6. the low temperature broadband low noise amplifier according to claim 2 or 5, it is characterized in that, signal input sources and signal output part all adopt sub-miniature A connector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420759238.8U CN204231301U (en) | 2014-12-04 | 2014-12-04 | A kind of low temperature broadband low noise amplifier |
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| CN201420759238.8U CN204231301U (en) | 2014-12-04 | 2014-12-04 | A kind of low temperature broadband low noise amplifier |
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| CN204231301U true CN204231301U (en) | 2015-03-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787598A (en) * | 2021-01-29 | 2021-05-11 | 河北雄安太芯电子科技有限公司 | W-band ultra-wideband low-noise amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787598A (en) * | 2021-01-29 | 2021-05-11 | 河北雄安太芯电子科技有限公司 | W-band ultra-wideband low-noise amplifier |
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