CN109861653A - A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect - Google Patents
A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect Download PDFInfo
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- CN109861653A CN109861653A CN201811627967.7A CN201811627967A CN109861653A CN 109861653 A CN109861653 A CN 109861653A CN 201811627967 A CN201811627967 A CN 201811627967A CN 109861653 A CN109861653 A CN 109861653A
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- 230000000694 effects Effects 0.000 title claims abstract description 22
- 230000002093 peripheral effect Effects 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 8
- 229910052573 porcelain Inorganic materials 0.000 claims description 3
- 230000003068 static effect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000005421 electrostatic potential Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000004706 metal oxides Chemical group 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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Abstract
The invention discloses a kind of circuits for improving antenna-feeder system pre-low-noise amplifier antistatic effect, which includes product input port, low-noise amplifier and single order high-pass filter, and the low-noise amplifier includes input port and peripheral circuit；The single order high-pass filter is connected between the product input port and the input port of the low-noise amplifier.The present invention can effectively improve antenna-feeder system pre-low-noise amplifier antistatic effect by single order high-pass filter of connecting between product input port and the input port of low-noise amplifier.
Description
Technical field
The invention belongs to electrostatic process field more particularly to a kind of raising antenna-feeder system pre-low-noise amplifier are anti-
The circuit of electrostatic capacity.
Background technique
Electrostatic is a kind of charge to remain static or perhaps immobilising charge.When accumulation is in some object
It is formed electrostatic when upper or surface, and charge is divided into positive charge and two kinds of negative electrical charge, that is to say, that electrostatic phenomenon is also classified into two
Kind is positive electrostatic and negative electrostatic.It is formed positive electrostatic when positive charge is gathered on some object, when negative electrical charge is gathered in some
Negative electrostatic is formed when object is upper.When static discharge occurs, static discharge current is the rising edge for being less than 10ns,
The energy of static discharge is concentrated mainly on tens megahertzs to several hundred megahertzs, and to filter out rising edge can use ESD (Electro-
Static discharge, Electro-static Driven Comb) protection device, it is also possible to filter is realized filtering out the energy of frequency band with this quiet
Electricity protection.
TVS pipe, also known as transient voltage eliminate pipe, are a kind of solid-state diodes, and P/N junction area is larger, have very strong height
Ability to bear is pressed, can handle high transient current caused by lightning and ESD, junction capacity is usually in several pico farads of zero point to tens skins
Method.
Zener diode, also known as zener diode can protect ESD sensitivity using the reverse breakdown characteristics of Zener diode
Device, but its junction capacity is usually tens pico farads.
Varistor, also known as multiple layer metal oxide structure device (MLV) can also carry out effective instantaneous high pressure impact suppression
System, this device are suitable for electrostatic or the surge of the route and device less sensitive to voltage to protect, are commonly used in power supply
Circuit.
Filter network can do electrostatic protection with RC circuit for low frequency signal, such as ADC, audio input, for high frequency
Signal, which filters out ESD main energetic with high-pass filtering method, can also achieve the purpose that electrostatic protection.
Low-noise amplifier is one in the application such as Modern wireless communication, radar, electronic countermeasure and remote measuring and controlling reception system
A very important part is usually used in the rear class of receiving antenna, receives the front end of system, it is desirable that noise coefficient is small, believes in amplification
Number while inhibit noise jamming, improve system sensitivity.It provides there is an urgent need to those skilled in the art and is effectively promoted at present
The method of low-noise amplifier antistatic effect.
Summary of the invention
Technical problem solved by the present invention is the embodiment of the invention provides a kind of preposition low noises of raising antenna-feeder system to put
The circuit of big device antistatic effect, passes through single order of connecting between product input port and the input port of the low-noise amplifier
High-pass filter series connection, can promote the antistatic effect of low-noise amplifier.
In order to solve the above-mentioned technical problem, the invention discloses a kind of raising antenna-feeder system pre-low-noise amplifier resist it is quiet
The circuit of electric energy power, comprising: product input port, low-noise amplifier and single order high-pass filter, the low-noise amplifier
Including input port and peripheral circuit；The single order high-pass filter is connected on the product input port and puts with the low noise
Between the input port of big device.
Optionally, the single order high-pass filter includes: the first inductance, the second inductance, third inductance and capacitor；Institute
It states capacitor and second inductance is connected between the product input port and the input port of the low noise amplifier
On access, first inductance and the third inductance are parallel to ground.
Optionally, the capacitor is high frequency porcelain Jie chip capacitor.
Optionally, first inductance, second inductance and the third inductance are high-frequency line around inductance.
Optionally, when electrostatic is from the product input port feed-in, it is quiet that the electrostatic successively passes through first inductance
Electricity releases, inhibits by the second inductance electrostatic, enters the low noise amplification after the third inductance electrostatic leakage
The input port of device.
The invention has the following advantages that
The embodiment of the invention discloses a kind of circuit for improving antenna-feeder system pre-low-noise amplifier antistatic effect, packets
Include: product input port, low-noise amplifier and single order high-pass filter, low-noise amplifier include input port and periphery electricity
Road；Single order high-pass filter is connected between the product input port and the input port of low-noise amplifier, can be effective
Promote antenna-feeder system pre-low-noise amplifier antistatic effect.
Detailed description of the invention
Fig. 1 is a kind of electricity of raising antenna-feeder system pre-low-noise amplifier antistatic effect described in the embodiment of the present invention
The schematic diagram on road.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to disclosed by the invention
Embodiment is described in further detail.
The circuit provided in an embodiment of the present invention for improving antenna-feeder system pre-low-noise amplifier antistatic effect, in low noise
Acoustic amplifier input port increases single order high-pass filter.Low-noise amplifier is electrostatic sensitivity device, ESD Machine
Model is 60V or so.For the low-noise amplifier in antenna-feeder system, because antenna is directly connected with low-noise amplifier, in life
If it is improper with electrostatic protection in use process to produce, discharge when electrostatic potential passes through antenna house, electrostatic potential can pass through antenna sense
Low-noise amplifier should be caused to damage or damage to low-noise amplifier input port.
In the embodiment of the present invention, increase single order high-pass filter in the input port of antenna-feeder system pre-low-noise amplifier
Afterwards, through emulating, antistatic effect is 8000V or so；Apply ± 3 electrostatic electricity in the input port of single order high-pass filter
Pressure, experiment proves that, antistatic effect is 8500V or so.It is again right while improving low-noise amplifier antistatic effect
The input port standing wave of product is matched.The spies such as the circuit is wide, small in size, at low cost with working frequency range, is widely used
Point.
Referring to Fig.1, show a kind of raising antenna-feeder system pre-low-noise amplifier described in the embodiment of the present invention resist it is quiet
The schematic diagram of the circuit of electric energy power.
In the present embodiment, which includes: product input port P1, low-noise amplifier and single order high-pass filter
(part that circle is enclosed in Fig. 1 be single order high-pass filter), low-noise amplifier include input port A1 and peripheral circuit,
Furthermore low-noise amplifier further includes output port P2.
Single order high-pass filter is connected between product input port P1 and the input port A1 of low-noise amplifier.
In a preferred embodiment of the present invention, single order high-pass filter includes: the first inductance L1, the second inductance L2, third
Inductance L3 and capacitor C1；Capacitor C1 and the second inductance L2 is connected on the product input port P1 and low noise amplifier
On access between input port A1, the first inductance L1 and third inductance L3 are parallel to ground.C2 and C3 is coupled capacitor, remaining
Device is the peripheral circuit of low-noise amplifier.Kind improves in the circuit of antenna-feeder system pre-low-noise amplifier antistatic effect
Inductance and capacitor in choosing value, the first inductance L1, third inductance L3 inductance should be as small as possible, capacitor C1, second electricity
When feeling L2 and generating the resonance frequency for being greater than 100MHz, the value of capacitor C1 should be minimized and increase the inductance of the second inductance L2
Value.
In a preferred embodiment of the present invention, capacitor C1 is high frequency porcelain Jie chip capacitor, the first inductance L1, the second electricity
Feeling L2 and third inductance L3 is high-frequency line around inductance.High-frequency line small, at low cost and high reliablity around inductance Insertion Loss.
For radiofrequency signal, if doing electrostatic protection with capacitive devices such as TVS pipe, varistors, can significantly damage
Lose radiofrequency signal.Because the energy frequency spectrum of static discharge is wider, but be concentrated mainly on 100MHz or so, allowed according to high-pass filter
Frequency higher than a certain cut-off frequency passes through, and removes unnecessary low-frequency disturbance characteristic in signal, so high-pass filter can inhibit
The energy of static discharge.
In this preferred embodiment raising antenna-feeder system pre-low-noise amplifier antistatic effect circuit, when electrostatic from
When product input port P1 feed-in, electrostatic successively passes through the first inductance L1 electrostatic leakage, inhibits by the second inductance L2 electrostatic, warp
It crosses after third inductance L3 electrostatic leakage and enters the input port of the low-noise amplifier.When static discharge occurs by antenna
When, the first inductance L1 that electrostatic potential first passes through high-pass filter carries out part energy of releasing, and then passes through the second inductance L2
Inhibit part energy, then released by third inductance L3, finally considerably reduces static discharge to low noise amplification
The energy of device input port plays the role of protecting low-noise amplifier.
Below with reference to experimental data, raising antenna-feeder system pre-low-noise amplifier provided in an embodiment of the present invention is resisted quiet
The performance of the circuit of electric energy power is illustrated.
It is defeated in coupled capacitor C2 after single order high-pass filter is released in the pulse voltage of the port P1 application+8000V
It is 50V or so that exit port, which detects output voltage,.In the pulse voltage of the port P1 application -8000V, let out by single order high-pass filter
It is -50V or so in coupled capacitor output port detection output voltage after putting.
Table 1 is circuit of high pass filter actual-structure measurement table
It can be seen that insertion loss of the single order high-pass filter in 1000MHz~3000MHz by above-mentioned experimental data
Less than 0.4dB, input, output standing wave are less than 1.5.
The purpose of the present invention is right for low-noise amplifier front end energy based on TVS pipe, cavity body filter, dielectric filter
On the basis of amplifier plays electrostatic protection, comprehensive all kinds of devices are excellent, disadvantage, in amplifier front-end without considering that interference signal presses down
The single order high-pass filter that the present invention recommends can be used to realize amplifier in system, and the occasion for requiring noise coefficient low
The electrostatic protection of mouth.Single order high-pass filter of the invention, L1, L3 can value 10nH, L2 can value 68nH, C1 can value
2.7pF, for working frequency in 1000MHz~3000MHz, insertion loss is less than 0.3dB, and antistatic effect is greater than 8000V.According to
Different use occasions can increase L2 inductance, reduce C1 capacitance, or by increasing high pass by reducing L1, L3 inductance
The order of filter, to improve the electrostatic rejection ability of antenna-feeder system pre-low-noise amplifier.
The circuit provided in an embodiment of the present invention for improving antenna-feeder system pre-low-noise amplifier antistatic effect, passes through one
The inductance over the ground (L1, L3) of rank high-pass filter carries out electrostatic leakage, after L2 inhibits electrostatic, low-noise amplifier noise coefficient
Only deteriorate 0.4dB, low-noise amplifier input port electrostatic sensitive voltage class is reduced to 3 grades from 1 grade, can effectively improve low noise
The antistatic effect and its environmental suitability of amplifier in mouth.
The circuit provided by the invention for improving antenna-feeder system pre-low-noise amplifier antistatic effect, compared to directly existing
The input port of system connects low-noise amplifier, reduces the probability that amplifier fails in production and use process；Compared to
In input port connection cavity filter, dielectric filter and the electrostatic leakage diode of low-noise amplifier, reduce costs,
Volume is reduced, printed board fabric swatch is more flexible.
The circuit provided in an embodiment of the present invention for improving antenna-feeder system pre-low-noise amplifier antistatic effect can be applied
In working frequency 1000MHz~3000MHz low-noise amplifier, for improve rf inputs mouth anti-static-discharge capability,
Single order high-pass filter in the settable embodiment of the present invention.Single order high-pass filter insertion loss is less than 0.4dB, through emulating
And verification experimental verification, low-noise amplifier electrostatic sensitive voltage class can be reduced to by 1 grade (1V~1999V) 3 grades (4000V~
15999V)。
The above, optimal specific embodiment only of the invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.
Claims (5)
1. a kind of circuit for improving antenna-feeder system pre-low-noise amplifier antistatic effect characterized by comprising product is defeated
Inbound port, low-noise amplifier and single order high-pass filter, the low-noise amplifier include input port and peripheral circuit；
The single order high-pass filter is connected between the product input port and the input port of the low-noise amplifier.
2. circuit according to claim 1, which is characterized in that the single order high-pass filter includes: the first inductance, second
Inductance, third inductance and capacitor；
The capacitor and second inductance are connected on the input port of the product input port and the low noise amplifier
Between access on, first inductance and the third inductance are parallel to ground.
3. circuit according to claim 2, which is characterized in that the capacitor is high frequency porcelain Jie chip capacitor.
4. circuit according to claim 2, which is characterized in that first inductance, second inductance and described
Three inductance are high-frequency line around inductance.
5. circuit according to claim 2, which is characterized in that described when electrostatic is from the product input port feed-in
Electrostatic successively inhibits by the first inductance electrostatic leakage, by the second inductance electrostatic, is quiet by the third inductance
Electricity enters the input port of the low-noise amplifier after releasing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627967.7A CN109861653A (en) | 2018-12-28 | 2018-12-28 | A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627967.7A CN109861653A (en) | 2018-12-28 | 2018-12-28 | A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect |
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| Publication Number | Publication Date |
|---|---|
| CN109861653A true CN109861653A (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811627967.7A Pending CN109861653A (en) | 2018-12-28 | 2018-12-28 | A kind of circuit improving antenna-feeder system pre-low-noise amplifier antistatic effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332677A (en) * | 2020-11-25 | 2021-02-05 | 成都燎原星光电子有限责任公司 | High-voltage discharge circuit and control method thereof |
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| CN1607738A (en) * | 2003-10-14 | 2005-04-20 | 富士通媒体部品株式会社 | High-frequency switch module |
| CN1756454A (en) * | 2004-09-29 | 2006-04-05 | 华为技术有限公司 | Electrostatic discharge protection circuit with filtering device |
| CN201708794U (en) * | 2010-03-17 | 2011-01-12 | 宇龙计算机通信科技(深圳)有限公司 | Antenna radio-frequency front end circuit and mobile terminal |
| CN202282776U (en) * | 2011-10-28 | 2012-06-20 | 京信通信系统（中国）有限公司 | Receiver and base station system |
| JP2012186773A (en) * | 2011-03-08 | 2012-09-27 | Alps Electric Co Ltd | High-frequency filter circuit |
| CN203574804U (en) * | 2013-11-28 | 2014-04-30 | 深圳市能力科技有限公司 | Set-top box and signal processing circuit thereof |
| CN104883200A (en) * | 2015-06-05 | 2015-09-02 | 无锡中普微电子有限公司 | Improved duplexer applicable to dual-frequency transmitting and receiving system |
| CN205792464U (en) * | 2016-05-25 | 2016-12-07 | 广东机电职业技术学院 | A kind of low-noise amplifier |
-
2018
- 2018-12-28 CN CN201811627967.7A patent/CN109861653A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607738A (en) * | 2003-10-14 | 2005-04-20 | 富士通媒体部品株式会社 | High-frequency switch module |
| CN1756454A (en) * | 2004-09-29 | 2006-04-05 | 华为技术有限公司 | Electrostatic discharge protection circuit with filtering device |
| CN201708794U (en) * | 2010-03-17 | 2011-01-12 | 宇龙计算机通信科技(深圳)有限公司 | Antenna radio-frequency front end circuit and mobile terminal |
| JP2012186773A (en) * | 2011-03-08 | 2012-09-27 | Alps Electric Co Ltd | High-frequency filter circuit |
| CN202282776U (en) * | 2011-10-28 | 2012-06-20 | 京信通信系统（中国）有限公司 | Receiver and base station system |
| CN203574804U (en) * | 2013-11-28 | 2014-04-30 | 深圳市能力科技有限公司 | Set-top box and signal processing circuit thereof |
| CN104883200A (en) * | 2015-06-05 | 2015-09-02 | 无锡中普微电子有限公司 | Improved duplexer applicable to dual-frequency transmitting and receiving system |
| CN205792464U (en) * | 2016-05-25 | 2016-12-07 | 广东机电职业技术学院 | A kind of low-noise amplifier |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332677A (en) * | 2020-11-25 | 2021-02-05 | 成都燎原星光电子有限责任公司 | High-voltage discharge circuit and control method thereof |
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