CN205584140U - High out -band inhibition's amplifier - Google Patents
High out -band inhibition's amplifier Download PDFInfo
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- CN205584140U CN205584140U CN201620435319.1U CN201620435319U CN205584140U CN 205584140 U CN205584140 U CN 205584140U CN 201620435319 U CN201620435319 U CN 201620435319U CN 205584140 U CN205584140 U CN 205584140U
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- interface
- amplifier
- double
- noise amplifier
- radio frequency
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Abstract
The utility model discloses a high out -band inhibition's amplifier, including input interface, output interface, box body and wave filter, low -noise amplifier, radio frequency double -pole double -throw, the battery of setting in the box body, input interface, output interface setting are on the box body, and the input interface is connected with the input of wave filter through communication cable, and the output of wave filter is connected with radio frequency double -pole double -throw, and radio frequency double -pole double -throw is connected with low -noise amplifier's input, and low -noise amplifier's output is connected with radio frequency double -pole double -throw, and radio frequency double -pole double -throw is connected with the output interface through communication cable, the battery is connected with low -noise amplifier. The utility model discloses a built -in high wave filter that restraines, built -in radio frequency double -pole double -throw can select low -noise amplifier's expert or break to satisfy the demand of more radio test, provide more testing capabilities, can support the continuous field work of amplifier through built -in battery.
Description
Technical field
This utility model relates to amplifier technique field, particularly to the amplifier of a kind of high out-of-side rejection.
Background technology
In recent years, the utilization of radio art is more and more extensive, from 1997 the world radio conference (WRC-97) be wind profile radar delineation of activities, using wind profile radar as after radio location service, occur in that large quantities of wind profile radar, wind profile radar is the electromagnetic beam by launching different directions to high-altitude, receives and processes the information that these electromagnetic beams return because atmospheric vertical structure is uneven and carry out a kind of remote sensing equipment of high-altitude Wind measurement.But the amplifier but level suitable with wind profile radar is uneven, more test functions of wind profile radar cannot be met, also the situation that field cannot use continuously is occurred frequently in, one-time detection needs band multiple stage amplifier, and not Portable belt, not having the wave filter of built-in high out-of-side rejection, make radio monitoring aspect more complicated, equipment is more varied.
Utility model content
This utility model is to solve above-mentioned technical problem to provide a kind of meet more testing requirement, amplifier of high out-of-side rejection that is that can use the most in the wild, solves cannot to use continuously in the wild, one-time detection needs the technical problem of band multiple stage amplifier.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
The amplifier of a kind of high out-of-side rejection, including input interface, output interface, box body and the wave filter being arranged in box body, low noise amplifier, radio frequency double-point double-throw switch, battery；Described input interface, output interface are arranged on box body, described input interface is connected with the input of wave filter by communication cable, the outfan of described wave filter is connected with the first interface of radio frequency double-point double-throw switch, second interface of described radio frequency double-point double-throw switch is connected with the input of low noise amplifier, the outfan of described low noise amplifier is connected with the 3rd interface of radio frequency double-point double-throw switch, and the 4th interface of described radio frequency double-point double-throw switch is connected with output interface by communication cable；Described battery is connected with low noise amplifier.
This utility model provides the benefit that: by the interior wave filter setting high suppression, filters other interference signals, and suppression spurious level obtains the power supply signal of a characteristic frequency；The on-off of low noise amplifier can be selected, to meet the demand of more testing radio, it is provided that more test functions by built-in radio frequency double-point double-throw switch；The continuous field work of amplifier can be supported by internal battery；It is applied to the measurement of Wind profile radar signal, improves dynamic range and the receiving sensitivity of spectrum analyzer.
As a kind of preferred structure of the present utility model, cannot the on-off problem of manual switching low noise amplifier in order to improve, the amplifier of described high out-of-side rejection also includes the shift knob being arranged on box body, described shift knob connects and controls radio frequency double-point double-throw switch, described first interface and the 4th normally closed setting of interface, described first interface and the normally opened setting of the second interface, described second interface and the 3rd normally closed setting of interface, described 3rd interface and the 4th normally opened setting of interface.So, the shift knob by being arranged on box body gets final product the on-off of manual switching low noise amplifier.
As a kind of preferred structure of the present utility model, filtering and the problem of buffering is cannot be carried out in order to improve low noise amplifier, described low noise amplifier includes gain stage, filtering stage and buffer stage, the input of described low noise amplifier is connected with gain stage, described gain stage is connected with filtering stage, described filtering stage is connected with buffer stage, and described buffer stage is connected with the outfan of low noise amplifier.So, amplified the signal of low noise amplifier input by fixing or variable gain, be filtered amplifying signal by filtering stage, by buffer stage, filtering signal buffered, and output signal.
As a kind of preferred structure of the present utility model, described gain stage includes the first NPN type field-effect transistor, the source ground of described first NPN type field-effect transistor, and grid is connected with the input of low noise amplifier, and drain electrode is connected with filtering stage；Described filtering stage includes inducer, the first capacitor, the second capacitor, described buffer stage includes the second NPN type field-effect transistor, one end of described inducer is connected with the drain electrode of the first NPN type field-effect transistor, the other end of inducer and the source electrode of the second NPN type field-effect transistor are connected, described first capacitor is in parallel with inducer, one end of described second capacitor is connected with the drain electrode of the first NPN type field-effect transistor, the other end ground connection of the second capacitor；The grid of described second NPN type field-effect transistor is connected with external bias, and the drain electrode of the second NPN type field-effect transistor is connected with the outfan of low noise amplifier.
As a kind of preferred structure of the present utility model, in order to improve the problem not limiting Out-of-band rejection condition, the operating frequency of described wave filter is 1.23GHz to 1.415GHz.So, the Out-of-band rejection operating frequency of the wave filter of high suppression is reached.
Accompanying drawing explanation
Fig. 1 is the structural representation of the amplifier of this utility model high out-of-side rejection；
Fig. 2 is the internal circuit diagram of the amplifier of this utility model high out-of-side rejection；
Fig. 3 is the low noise amplifier block diagram of the amplifier of this utility model high out-of-side rejection；
Fig. 4 is the low-noise amplifier circuit figure of the amplifier embodiment of this utility model high out-of-side rejection.
Label declaration:
1, input interface；2, output interface；3, box body；4, shift knob；
31, wave filter；32, low noise amplifier；33, radio frequency double-point double-throw switch；34, battery；
35, communication cable；
301, gain stage；302, filtering stage；303, buffer stage.
Detailed description of the invention
By describing technology contents of the present utility model, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Please with reference to Fig. 1, Fig. 2, understand as shown in the figure, the amplifier of this utility model high out-of-side rejection includes input interface 1, output interface 2, box body 3, input interface 1, output interface 2 is arranged on the end face of box body 3, it is additionally provided with power interface on box body 3, shift knob 4, power interface is connected with battery, for charging the battery, wave filter 31 it is provided with in box body, low noise amplifier 32, radio frequency double-point double-throw switch 33, battery 34, communication cable 35, input interface 1 is connected by the input of communication cable 35 with wave filter 31, the outfan of wave filter 31 is connected with the first interface of radio frequency double-point double-throw switch 33, second interface of radio frequency double-point double-throw switch 33 is connected with the input of low noise amplifier 32；The outfan of low noise amplifier 32 is connected with the 3rd interface of radio frequency double-point double-throw switch 33, and the 4th interface of radio frequency double-point double-throw switch 33 is connected with output interface 2 by communication cable 35.Battery 34 is connected with low noise amplifier 32, radio frequency double-point double-throw switch 33, and powers to low noise amplifier 32, radio frequency double-point double-throw switch 33.
In the present embodiment, shift knob 4 connects and controls radio frequency double-point double-throw switch 33, described first interface and the 4th normally closed setting of interface, described first interface and the normally opened setting of the second interface under normality, described second interface and the 3rd normally closed setting of interface, described 3rd interface and the 4th normally opened setting of interface.Shift knob 4 is by being exactly first interface and the 4th interface is normally closed is connected, and the second interface and the 3rd interface is normally closed is connected, it is exactly first interface and the second interface is normally closed is connected that shift knob 4 presses down, the 3rd interface and the 4th interface is normally closed is connected.The break-make of low noise amplifier 32 can be switched by radio frequency double-point double-throw switch 33, meet the demand of more radio detection, set out according to actual, use convenient.Input interface 1, output interface 2 are radio frequency interface, and front panel exports；Battery is the built-in lithium battery of DC15V, 3A, can work continuously 5 hours；Work of the present utility model as temperature range be 0～+45 DEG C, weight be 2.5kg；The size (W × H × D) of box body 3 is 160 × 89 × 230mm；Communication cable 35 is the cable assembly of model TC18-03-03-1000.The band filter that wave filter 31 is selected, operating frequency between 1.23GHz to 1.415GHz, has been segmented range of application of the present utility model, has been suppressed spurious level.
As shown in Figure 3, in the present embodiment, low noise amplifier 32 includes gain stage 301, filtering stage 302, buffer stage 303, and gain stage 301 receives LNA input signal from the input of low noise amplifier 32, amplify described LNA input signal with fixing or variable gain, and amplification signal is provided.Filtering stage 302 is responded by wave filter and is filtered described amplified signal and provides filtered signal.Described filtered signal is buffered and provides for LNA output signal by buffer stage 303.
As shown in Figure 4, in the present embodiment, described gain stage 301 includes the first NPN type field-effect transistor, the source ground of described first NPN type field-effect transistor, and grid is connected with the input of low noise amplifier 32, and drain electrode is connected with filtering stage 302；Described filtering stage 302 includes inducer, the first capacitor, the second capacitor, described buffer stage 303 includes the second NPN type field-effect transistor, one end of described inducer is connected with the drain electrode of the first NPN type field-effect transistor, the other end of inducer and the source electrode of the second NPN type field-effect transistor are connected, described first capacitor is in parallel with inducer, one end of described second capacitor is connected with the drain electrode of the first NPN type field-effect transistor, the other end ground connection of the second capacitor；The grid of described second NPN type field-effect transistor is connected with external bias, and the drain electrode of the second NPN type field-effect transistor is connected with the outfan of low noise amplifier 32.External bias can be provided by feedback circuit, it is also possible to adding resistance for power supply provides, thus forms autobias and fixed-bias transistor circuit, can arrange according to the actual requirements.Battery 43 provides supply voltage.Second capacitor provides high impedance under desired signal frequency and provides Low ESR under the altofrequency higher than desired signal frequency.Inducer and the first capacitor and the second capacitor can be designed to obtain the wanted low-pass characteristic of wanted signal and the wanted stopband characteristic of interference signal.
During use, wave filter 31, low noise amplifier 32, radio frequency double-point double-throw switch 33, battery 34 are set, mix up desired parameters, this utility model is arranged between antenna and wind profile radar, for the measurement of Wind profile radar signal, improve dynamic range and the receiving sensitivity of spectrum analyzer.According to practical situation, radio frequency double-point double-throw switch may select the on/off of amplifier, to provide more test function.Internal battery 34 can support the continuous field work of amplifier more than 5 hours.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent shapes utilizing this utility model description and accompanying drawing content to be made or reconfiguration; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in scope of patent protection of the present utility model.
Claims (5)
1. the amplifier of a high out-of-side rejection, it is characterised in that: include input interface, output interface, box
Body and the wave filter being arranged in box body, low noise amplifier, radio frequency double-point double-throw switch, battery；
Described input interface, output interface are arranged on box body, and described input interface passes through communication cable and filter
The input of ripple device is connected, the first interface phase of the outfan of described wave filter and radio frequency double-point double-throw switch
Connecting, the second interface of described radio frequency double-point double-throw switch is connected with the input of low noise amplifier, described
The outfan of low noise amplifier is connected with the 3rd interface of radio frequency double-point double-throw switch, and described radio frequency double-pole is double
4th interface of throw switch is connected with output interface by communication cable；
Described battery is connected with low noise amplifier.
The amplifier of high out-of-side rejection the most according to claim 1, it is characterised in that: outside described high-band
The amplifier of suppression also includes the shift knob being arranged on box body, and described shift knob connects and controls radio frequency
Double-point double-throw switch, described first interface and the 4th normally closed setting of interface, described first interface and the second interface
Normally opened setting, described second interface and the 3rd normally closed setting of interface, described 3rd interface and the 4th interface are normally opened
Arrange.
The amplifier of high out-of-side rejection the most according to claim 1, it is characterised in that: described LNA
Big device includes that gain stage, filtering stage and buffer stage, the input of described low noise amplifier are connected with gain stage
Connecing, described gain stage is connected with filtering stage, and described filtering stage is connected with buffer stage, described buffer stage with
The outfan of low noise amplifier is connected.
The amplifier of high out-of-side rejection the most according to claim 3, it is characterised in that: described gain stage
Including the first NPN type field-effect transistor, the source ground of described first NPN type field-effect transistor,
Grid is connected with the input of low noise amplifier, and drain electrode is connected with filtering stage；
Described filtering stage includes inducer, the first capacitor, the second capacitor, and described buffer stage includes second
NPN type field-effect transistor, the drain electrode phase of one end of described inducer and the first NPN type field-effect transistor
Connecting, the other end of inducer and the source electrode of the second NPN type field-effect transistor are connected, described first electricity
Container is in parallel with inducer, one end of described second capacitor and the leakage of the first NPN type field-effect transistor
Pole is connected, the other end ground connection of the second capacitor；
The grid of described second NPN type field-effect transistor is connected with external bias, the second NPN type field
The drain electrode of effect transistor is connected with the outfan of low noise amplifier.
The amplifier of high out-of-side rejection the most according to claim 1, it is characterised in that: described wave filter
Operating frequency be 1.23GHz to 1.415GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620435319.1U CN205584140U (en) | 2016-05-13 | 2016-05-13 | High out -band inhibition's amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620435319.1U CN205584140U (en) | 2016-05-13 | 2016-05-13 | High out -band inhibition's amplifier |
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| Publication Number | Publication Date |
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| CN205584140U true CN205584140U (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620435319.1U Active CN205584140U (en) | 2016-05-13 | 2016-05-13 | High out -band inhibition's amplifier |
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| CN (1) | CN205584140U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541328A (en) * | 2019-01-14 | 2019-03-29 | 深圳市巴伦技术股份有限公司 | Low noise amplifier and electromagnetic compatibility test device |
-
2016
- 2016-05-13 CN CN201620435319.1U patent/CN205584140U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541328A (en) * | 2019-01-14 | 2019-03-29 | 深圳市巴伦技术股份有限公司 | Low noise amplifier and electromagnetic compatibility test device |
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