CN104320090A - Improved structure of low-noise amplifier - Google Patents
Improved structure of low-noise amplifier Download PDFInfo
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- CN104320090A CN104320090A CN201410514387.2A CN201410514387A CN104320090A CN 104320090 A CN104320090 A CN 104320090A CN 201410514387 A CN201410514387 A CN 201410514387A CN 104320090 A CN104320090 A CN 104320090A
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- noise amplifier
- low noise
- low
- attenuator
- isolator
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Abstract
The invention discloses an improved structure of a low-noise amplifier. The improved structure of the low-noise amplifier comprises lightning arrestors, an input isolator, a primary low-noise amplifier, a secondary low-noise amplifier, a surface acoustic wave filter, a tertiary low-noise amplifier, a quaternary low-noise amplifier, a detector, a microprocessor and an output isolator, wherein the input isolator, the primary low-noise amplifier, the secondary low-noise amplifier, the surface acoustic wave filter and the tertiary low-noise amplifier are sequentially connected with one another; the quaternary low-noise amplifier and the output isolator are sequentially connected with each other, and a first attenuator and a second attenuator are also sequentially arranged between the tertiary low-noise amplifier and the quaternary low-noise amplifier; both the primary low-noise amplifier and the secondary low-noise amplifier are respectively connected with the lightning arrestors, and the lightning arrestors are grounded; the detector is also arranged between the quaternary low-noise amplifier and the output isolator, the detector is connected with the microprocessor, and the microprocessor is also connected with the first attenuator and the second attenuator. Through the principle, the lightning arresting function is provided, so that even when the low-noise amplifier works in the open air, the low-noise amplifier is unlikely to damage; meanwhile, the output power also can be detected, an input signal gain also can be better adjusted, and the level is controlled.
Description
Technical field
The present invention relates to amplifier region, be specifically related to the modified node method of low noise amplifier.
Background technology
The product that mobile communication technology is modern communication technology and computer technology high development and be combined with each other.Along with the extensive use of digital information technique, modern communication technology is just with unprecedented high speed development, and mobile communication is also just along the future development of multiple access communication.CDMA (code division multiple access) compares with TDMA (time division multiple access) with FDMA (frequency division multiple access), has the large and flexible configuration of power system capacity, the availability of frequency spectrum is high, soft handover, security performance are good advantage.Be widely used based on these advantage CDMA technology.The Main Function of low noise amplifier is the small-signal that amplifying antenna receives from air interface, reduces noise jamming, recalls required information data for For Solutions of Systems.Low noise amplifier determines the noise factor of receiver, is the key position of high sensitive receiver in the field such as satellite communication, radar communication, by the amplifier of ultra-low noise, thus improves the sensitivity of receiver.Existing back noise amplifier, when outside work, is easily subject to the impact of thunder and lightning and damages, being unfavorable for receiving data information, and existing low noise amplifier cannot detect power output simultaneously, is unfavorable for the adjustment in later stage.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, the modified node method of low noise amplifier is provided, this apparatus, with lightning function, even if not fragile at outside work yet, can power output be detected simultaneously, can better realize regulating input signal gain, Automatic level control.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: the modified node method of low noise amplifier, comprise lightning arrester, input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter, three grades of low noise amplifiers, level Four low noise amplifier, wave detector, microprocessor and output isolators, described input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter are connected successively with three grades of low noise amplifiers, and input signal is inputted by input isolator; Described level Four low noise amplifier is connected successively with output isolator, exports isolator output signal, between three grades of low noise amplifiers and level Four low noise amplifier, also connects the first attenuator and the second attenuator successively; Described prime low noise amplifier is all connected lightning arrester with on secondary low noise amplifier, the equal ground connection of lightning arrester; Go back tie geophone between described level Four low noise amplifier and output isolator, wave detector is connected with microprocessor, and microprocessor also connects the first attenuator and the second attenuator.
Input arranges input isolator, arranges output isolator at output signal end, can obtain good input and output standing-wave ratio.The setting of SAW (Surface Acoustic Wave) filter, the various spurious signals outside inhibition zone, improve low noise amplifier Out-of-band rejection performance, can filter steeper filter bag, frequency selectivity is better.Prime low noise amplifier and secondary low noise amplifier all arrange lightning arrester, when this amplifier is arranged on outdoor, when amplifying antenna is from aerial reception small-signal, avoids thunder and lightning weather to the damage of amplifier, better transmission of information.At the output also tie geophone of level Four low noise amplifier, realize power output and detect, then pass to microprocessor, information feed back is given the first attenuator and the second attenuator by microprocessor again, better realizes the adjustment of gain and the control of level.
Described first attenuator is numerical-control attenuator, and the second attenuator is sub-controlling attenuation device.An adjustable gain joint achieving input signal above, after the control achieving power output.
The model of described microprocessor is MSP430.The operation principle of this processor and the course of work are all same as the prior art, and 16 low-power scms that MSP430 series monolithic is a kind of super low-power consumption, functional integration is higher, are specially adapted to require occasion low in energy consumption.
Described lightning arrester model is DXH06-FA.This kind of lightning arrester modularization is installed, and long service life, without leaky, coefficient of safety is high.
Compared with prior art, the invention has the beneficial effects as follows:
1, the setting of SAW (Surface Acoustic Wave) filter, the various spurious signals outside inhibition zone, improve low noise amplifier Out-of-band rejection performance, can filter steeper filter bag, frequency selectivity is better.
2, the setting of lightning arrester, can avoid thunder and lightning weather to the damage of amplifier at the receiving terminal of signal, even if also can work preferably in outdoor, and better transmission of information.
3, at the output also tie geophone of level Four low noise amplifier, realize power output to detect, then pass to microprocessor, information feed back is given the first attenuator and the second attenuator by microprocessor again, better realizes the adjustment of gain and the control of level.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited thereto.
Embodiment 1:
As shown in fig. 1, the present invention includes the modified node method of low noise amplifier, comprise lightning arrester, input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter, three grades of low noise amplifiers, level Four low noise amplifier, wave detector, microprocessor and output isolators, described input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter are connected successively with three grades of low noise amplifiers, and input signal is inputted by input isolator; Described level Four low noise amplifier is connected successively with output isolator, exports isolator output signal, between three grades of low noise amplifiers and level Four low noise amplifier, also connects the first attenuator and the second attenuator successively; Described prime low noise amplifier is all connected lightning arrester with on secondary low noise amplifier, the equal ground connection of lightning arrester; Go back tie geophone between described level Four low noise amplifier and output isolator, wave detector is connected with microprocessor, and microprocessor also connects the first attenuator and the second attenuator.
First, input signal first realizes good input vswr performance by input isolator; Then then input signal amplifies through prime low noise amplifier, secondary low noise amplifier two-stage, then through SAW (Surface Acoustic Wave) filter, out of band signal is suppressed, again through three grades of low noise amplifiers through the third level amplify after, through realizing the numerical-control attenuator of adjustable gain joint, through realizing auto level control voltage-controlled attenuator, the fourth stage again through level Four low noise amplifier amplifies, realize power output with time-division part energy to wave detector to detect, main signal exports finally by output isolator.Input arranges input isolator, arranges output isolator at output signal end, can obtain good input and output standing-wave ratio.The setting of SAW (Surface Acoustic Wave) filter, the various spurious signals outside inhibition zone, improve low noise amplifier Out-of-band rejection performance, can filter steeper filter bag, frequency selectivity is better.Prime low noise amplifier and secondary low noise amplifier all arrange lightning arrester, when this amplifier is arranged on outdoor, when amplifying antenna is from aerial reception small-signal, avoids thunder and lightning weather to the damage of amplifier, better transmission of information.At the output also tie geophone of level Four low noise amplifier, realize power output and detect, then pass to microprocessor, information feed back is given the first attenuator and the second attenuator by microprocessor again, better realizes the adjustment of gain and the control of level.
Embodiment 2:
The present embodiment preferred concrete structure on the basis of embodiment 1 is as follows: described first attenuator is numerical-control attenuator, and the second attenuator is sub-controlling attenuation device.The former achieves the adjustable gain joint of input signal.The latter achieves the automatic control of power output.
The model of described microprocessor is MSP430.The operation principle of this processor and the course of work are all same as the prior art, and 16 low-power scms that MSP430 series monolithic is a kind of super low-power consumption, functional integration is higher, are specially adapted to require occasion low in energy consumption.
Described lightning arrester model is DXH06-FA.This kind of lightning arrester modularization is installed, and long service life, without leaky, coefficient of safety is high.
Just this invention can be realized as mentioned above.
Claims (4)
1. the modified node method of low noise amplifier, it is characterized in that: comprise lightning arrester, input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter, three grades of low noise amplifiers, level Four low noise amplifier, wave detector, microprocessor and output isolators, described input isolator, prime low noise amplifier, secondary low noise amplifier, SAW (Surface Acoustic Wave) filter are connected successively with three grades of low noise amplifiers, and input signal is inputted by input isolator; Described level Four low noise amplifier is connected successively with output isolator, exports isolator output signal, between three grades of low noise amplifiers and level Four low noise amplifier, also connects the first attenuator and the second attenuator successively; Described prime low noise amplifier is all connected lightning arrester with on secondary low noise amplifier, the equal ground connection of lightning arrester; Go back tie geophone between described level Four low noise amplifier and output isolator, wave detector is connected with microprocessor, and microprocessor also connects the first attenuator and the second attenuator.
2. the modified node method of low noise amplifier according to claim 1, is characterized in that: described first attenuator is numerical-control attenuator, and the second attenuator is sub-controlling attenuation device.
3. the modified node method of low noise amplifier according to claim 1, is characterized in that: the model of described microprocessor is MSP430.
4. the modified node method of low noise amplifier according to claim 1, is characterized in that: described lightning arrester model is DXH06-FA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410514387.2A CN104320090A (en) | 2014-09-30 | 2014-09-30 | Improved structure of low-noise amplifier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410514387.2A CN104320090A (en) | 2014-09-30 | 2014-09-30 | Improved structure of low-noise amplifier |
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| CN104320090A true CN104320090A (en) | 2015-01-28 |
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| CN201410514387.2A Pending CN104320090A (en) | 2014-09-30 | 2014-09-30 | Improved structure of low-noise amplifier |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306078A (en) * | 2015-11-09 | 2016-02-03 | 天津七一二通信广播有限公司 | High gain amplifier for radio frequency direct sampling receiver and realization method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201414112Y (en) * | 2009-06-17 | 2010-02-24 | 泉州市协高微波电子有限公司 | Low-noise amplifier used at mobile communication repeater |
| CN204156818U (en) * | 2014-09-30 | 2015-02-11 | 绵阳雷迪创微电子科技有限公司 | Improved low-noise amplifier |
-
2014
- 2014-09-30 CN CN201410514387.2A patent/CN104320090A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201414112Y (en) * | 2009-06-17 | 2010-02-24 | 泉州市协高微波电子有限公司 | Low-noise amplifier used at mobile communication repeater |
| CN204156818U (en) * | 2014-09-30 | 2015-02-11 | 绵阳雷迪创微电子科技有限公司 | Improved low-noise amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 何海龙等: "CMDA低噪声放大器的研究与设计", 《科学技术与工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105306078A (en) * | 2015-11-09 | 2016-02-03 | 天津七一二通信广播有限公司 | High gain amplifier for radio frequency direct sampling receiver and realization method thereof |
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