CN105403898B - A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation - Google Patents
A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation Download PDFInfo
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- CN105403898B CN105403898B CN201510875380.8A CN201510875380A CN105403898B CN 105403898 B CN105403898 B CN 105403898B CN 201510875380 A CN201510875380 A CN 201510875380A CN 105403898 B CN105403898 B CN 105403898B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
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- General Physics & Mathematics (AREA)
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Abstract
The present invention relates to a kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation and method.The amplification of this radio frequency reception channel circuit integrated low-noise, mixing, filter function, radiofrequency signal first passes through LNA filter circuit after entering, low noise amplification is carried out by amplifier N1, rf filtering is carried out by wave filter Z1 again, low noise amplification is carried out by amplifier N3 again, then rf filtering is carried out by wave filter Z2；Then signal enters lower frequency changer circuit, intermediate-freuqncy signal is first down-converted to by frequency mixer N4, it is filtered by the wave filter being made up of inductance L3, electric capacity C24 and inductance L4, then signal enters intermediate frequency filtering and amplifying circuit, intermediate frequency amplification is carried out by amplifier N6 again, intermediate frequency filtering is carried out by wave filter N7, is then fed into digital anti-jamming circuit processing；The 1dB of amplifiers at different levels compresses the sufficiently large of point selection so that jamming-to-signal ratio is 70dB big interference signal energy Linear Amplifer, makes signal effectively and enters next stage circuit without distortion.
Description
Technical field
The present invention relates to a kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation.
Background technology
Radio frequency reception channel circuit is a part essential in anti-interference antenna of satellite navigation, and index request is high, both
Meet the requirement of sensitivity, adapt to jamproof demand again.Original radio frequency reception channel circuit reception signal scope is small,
Maximum can receive the interference signal that jamming-to-signal ratio is 65dB, and complicated, and component is various, debugging trouble, and noise coefficient is big
In 2, the noise of introducing is larger, influences the signal quality of complete machine.
The content of the invention
In view of the shortcomings of the prior art, simple in construction the anti-interference day of satellite navigation is realized the invention provides a kind of
The radio frequency reception channel circuit of line.The circuit can receive -133dBm weak satellite signal, can also receive jamming-to-signal ratio and be
70dB big interference signal, make signal effectively and enter next stage circuit without distortion.
The present invention to achieve the above object, is adopted the technical scheme that：A kind of anti-interference antenna of satellite navigation realized
Radio frequency reception channel circuit, it is characterised in that：Including LNA filter circuit, lower frequency changer circuit, intermediate frequency filtering and amplifying circuit, electricity
Source circuit, the LNA filter circuit are connected by lower frequency changer circuit with intermediate frequency filtering and amplifying circuit, power circuit respectively with
LNA filter circuit, lower frequency changer circuit, the connection of intermediate frequency filtering and amplifying circuit；
Power circuit is connected as：Voltage-stablizer N2 1 pin connect electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 one end and
Voltage-stablizer N2 3 pin and external power source+5V, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 other end ground connection, voltage-stablizer
N2 2 pin ground connection, 4 pin connect electric capacity C9 one end, and the electric capacity C9 other end meets voltage-stablizer N2 5 pin, electric capacity C7, electric capacity C8 respectively
One end, electric capacity C7, electric capacity C8 the other end ground connection；
Voltage-stablizer N5 1 pin connect electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 one end and voltage-stablizer N5 3 pin and
External power source+5V, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 other end ground connection, voltage-stablizer N5 2 pin ground connection, 4 pin
Electric capacity C18 one end is connect, the electric capacity C18 other end connects voltage-stablizer N5 5 pin, electric capacity C16, electric capacity C17 one end, electric capacity respectively
C16, electric capacity C17 other end ground connection；
LNA filter circuit is connected as：Amplifier N1 1 pin as signal input part, 2 pin connect electric capacity C1 one end and
Power circuit voltage-stablizer N2 5 pin, electric capacity C1 other end ground connection, amplifier N1 3 pin connect wave filter Z1 2 pin, N1 4 pin
Ground connection,
Wave filter Z1 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin connect amplifier N3 3 pin by electric capacity C2, amplifier N3's
1 pin, 4 pin ground connection, 2 pin connect inductance L1, electric capacity C3 one end respectively, and the inductance L1 other end connects electric capacity C4, electric capacity C5, electricity respectively
Hold C6 one end and power input+5V, electric capacity C4, electric capacity C5, electric capacity C6 other ends ground connection,
Electric capacity C3 another termination wave filter Z2 2 pin, wave filter Z2 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin and interface
T1 connections；
Lower frequency changer circuit is connected as：Frequency mixer N4 1 pin meets the interface T1 of LNA filter circuit by electric capacity C14, and 2
Pin, 4 pin, 5 pin ground connection, 3 pin connect outside source by electric capacity C15, and 6 pin connect electric capacity C25, electric capacity C26, electric capacity by inductance L2
C27 one end and power circuit voltage-stablizer N5 5 pin, electric capacity C25, electric capacity C26, electric capacity C27 other end ground connection,
Frequency mixer N4 8 pin connect electric capacity C24 and inductance L4 one end, electric capacity C24 other ends ground connection, inductance by inductance L3
L4 another termination capacitor C23 one end；
Intermediate frequency filtering and amplifying circuit is connected as：Amplifier N6 1 pin connects the lower frequency changer circuit electric capacity C23 other end, 2 pin,
4 pin are grounded, and 3 pin connect inductance L5, electric capacity C32 one end, and the inductance L5 other end connects electric capacity C28, electric capacity C29, electric capacity respectively
C30, electric capacity C31 and resistance R1 one end, resistance R1 another termination power input+5V, electric capacity C28, electric capacity C29, electric capacity
C30, electric capacity C31 other end ground connection, electric capacity C32 another terminating resistor R2 and resistance R3 one end, the resistance R2 other end
Ground connection, resistance R3 another terminating resistor R4 and electric capacity C33 one end, resistance R4 other end ground connection, the electric capacity C33 other end
Connect wave filter N7 1 pin, wave filter N7 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin, 9 pin, 10 pin, 11 pin, 12 pin ground connection, 2 pin
Signal output part is connect by electric capacity C34；Amplifier N1 model WHM14-3020BE, wave filter Z1, Z2 model
SF2186E, amplifier N3 model PSA4-5043+, frequency mixer N4 model ADL5350ACPZ-R7, amplifier N6 models
AG303-86, wave filter N7 models WPSWB46M52-20.
It is characteristic of the invention that：Solves the radio frequency reception channel circuit applied in anti-interference antenna of satellite navigation, both
The requirement of sensitivity can be met, and can adapts to jamproof demand.The radio frequency reception channel circuit have can receive from -133dBm
Weak satellite signal to the ability for the big interference signal that jamming-to-signal ratio is 70dB, low noise is carried out to satellite-signal and interference signal
Sound amplification, filtering, Frequency mixing processing, then send signal into digital anti-jamming circuit.Circuit components are less, and debugging is simple, and
Noise coefficient is less than or equal to 1.5, the noise very little of introducing.
Brief description of the drawings
Fig. 1 is that circuit of the present invention connects block diagram；
Fig. 2 is power circuit diagram of the present invention；
Fig. 3 is LNA filter circuit figure of the present invention；
Fig. 4 is lower frequency changer circuit figure of the present invention；
Fig. 5 is intermediate frequency filtering and amplifying circuit figure of the present invention.
Embodiment
As shown in Figures 1 to 5, the radio frequency reception channel circuit of anti-interference antenna of satellite navigation, including LNA filter are realized
Wave circuit, lower frequency changer circuit, intermediate frequency filtering and amplifying circuit, power circuit, LNA filter circuit is by lower frequency changer circuit with
Frequency filtering and amplifying circuit connects, and power circuit connects with LNA filter circuit, lower frequency changer circuit, intermediate frequency filtering and amplifying circuit respectively
Connect.
Power circuit is connected as：Voltage-stablizer N2 1 pin connect electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 one end and
Voltage-stablizer N2 3 pin and external power source+5V, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 other end ground connection, voltage-stablizer
N2 2 pin ground connection, 4 pin connect electric capacity C9 one end, and the electric capacity C9 other end meets voltage-stablizer N2 5 pin, electric capacity C7, electric capacity C8 respectively
One end, electric capacity C7, electric capacity C8 the other end ground connection.
Voltage-stablizer N5 1 pin connect electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 one end and voltage-stablizer N5 3 pin and
External power source+5V, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 other end ground connection, voltage-stablizer N5 2 pin ground connection, 4 pin
Electric capacity C18 one end is connect, the electric capacity C18 other end connects voltage-stablizer N5 5 pin, electric capacity C16, electric capacity C17 one end, electric capacity respectively
C16, electric capacity C17 other end ground connection.
LNA filter circuit is connected as：Amplifier N1 1 pin as signal input part, 2 pin connect electric capacity C1 one end and
Power circuit voltage-stablizer N2 5 pin, electric capacity C1 other end ground connection, amplifier N1 3 pin connect wave filter Z1 2 pin, N1 4 pin
Ground connection, wave filter Z1 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin connect amplifier N3 3 pin by electric capacity C2, and the 1 of amplifier N3
Pin, 4 pin ground connection, 2 pin connect inductance L1, electric capacity C3 one end respectively, and the inductance L1 other end connects electric capacity C4, electric capacity C5, electricity respectively
Hold C6 one end and power input+5V, electric capacity C4, electric capacity C5, electric capacity C6 other ends ground connection, electric capacity C3 another termination filtering
Device Z2 2 pin, wave filter Z2 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin are connected with interface T1.
Lower frequency changer circuit is connected as：Frequency mixer N4 1 pin meets the interface T1 of LNA filter circuit by electric capacity C14, and 2
Pin, 4 pin, 5 pin ground connection, 3 pin connect outside source by electric capacity C15, and 6 pin connect electric capacity C25, electric capacity C26, electric capacity by inductance L2
C27 one end and power circuit voltage-stablizer N5 5 pin, electric capacity C25, electric capacity C26, electric capacity C27 other end ground connection,
Frequency mixer N4 8 pin connect electric capacity C24 and inductance L4 one end, electric capacity C24 other ends ground connection, inductance by inductance L3
L4 another termination capacitor C23 one end.
Intermediate frequency filtering and amplifying circuit is connected as：Amplifier N6 1 pin connects the lower frequency changer circuit electric capacity C23 other end, 2 pin,
4 pin are grounded, and 3 pin connect inductance L5, electric capacity C32 one end, and the inductance L5 other end connects electric capacity C28, electric capacity C29, electric capacity respectively
C30, electric capacity C31 and resistance R1 one end, resistance R1 another termination power input+5V, electric capacity C28, electric capacity C29, electric capacity
C30, electric capacity C31 other end ground connection, electric capacity C32 another terminating resistor R2 and resistance R3 one end, the resistance R2 other end
Ground connection, resistance R3 another terminating resistor R4 and electric capacity C33 one end, resistance R4 other end ground connection, the electric capacity C33 other end
Connect wave filter N7 1 pin, wave filter N7 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin, 9 pin, 10 pin, 11 pin, 12 pin ground connection, 2 pin
Signal output part is connect by electric capacity C34；Amplifier N1 model WHM14-3020BE, wave filter Z1, Z2 model
SF2186E, amplifier N3 model PSA4-5043+, frequency mixer N4 model ADL5350ACPZ-R7, amplifier N6 models
AG303-86, wave filter N7 model WPSWB46M52-20, it is a kind of LC wave filters formed by inductance and capacitor combination, by
He Xun Electronics Co., Ltd.s of Shenzhen produce.
A kind of method for the radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation, implementation method are as follows：Originally penetrate
The amplification of frequency receiving channel circuit integrated low-noise, mixing, filter function, radiofrequency signal first pass through LNA filtered electrical after entering
Road, low noise amplification is carried out by amplifier N1, amplifier N1 noise coefficient is 0.5dB, then carries out radio frequency filter by wave filter Z1
Ripple, then low noise amplification is carried out by amplifier N3, amplifier N3 noise coefficient is 0.75dB, then carries out radio frequency by wave filter Z2
Filtering；Because system noise factor is mainly determined by circuit front-end, it is seen that the noise very little that this radio frequency reception channel circuit introduces,
All add wave filter after per first stage amplifier, ensure filter effect；Then signal enters lower frequency changer circuit, first by frequency mixer N4
Intermediate-freuqncy signal is down-converted to, is filtered by the wave filter being made up of inductance L3, electric capacity C24 and inductance L4, then signal enters
Enter intermediate frequency filtering and amplifying circuit, then intermediate frequency amplification is carried out by amplifier N6, intermediate frequency filtering is carried out by wave filter N7, is then fed into number
The processing of word anti-jamming circuit；The 1dB of amplifiers at different levels compresses the sufficiently large of point selection so that the big interference that jamming-to-signal ratio is 70dB is believed
Number can Linear Amplifer so that satellite-signal is undistorted.
The technical indicator that this circuit reaches is as follows：
Conversion gain：55dB±1dB
Channel width：25MHz±5MHz
Noise coefficient：≤1.5
Export P1dB：>10dBm @50MHz
Out-of-band rejection：At f0 ± 23MHz >=55dB
Third order intermodulation IMD3：>=55dBc@passages export two -8dBm tone signal.
Claims (1)
- A kind of 1. radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation, it is characterised in that：Filtered including LNA Circuit, lower frequency changer circuit, intermediate frequency filtering and amplifying circuit, power circuit, the LNA filter circuit by lower frequency changer circuit with Intermediate frequency filtering and amplifying circuit connect, power circuit respectively with LNA filter circuit, lower frequency changer circuit, intermediate frequency filtering and amplifying circuit Connection；Power circuit is connected as：Voltage-stablizer N2 1 pin connects electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 one end and voltage stabilizing Device N2 3 pin and external power source+5V, electric capacity C10, electric capacity C11, electric capacity C12, electric capacity C13 other end ground connection, voltage-stablizer N2's 2 pin are grounded, and 4 pin connect electric capacity C9 one end, and the electric capacity C9 other end meets voltage-stablizer N2 5 pin, electric capacity C7, the one of electric capacity C8 respectively End, electric capacity C7, electric capacity C8 other end ground connection；Voltage-stablizer N5 1 pin connects electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 one end and voltage-stablizer N5 3 pin and outside Power supply+5V, electric capacity C19, electric capacity C20, electric capacity C21, electric capacity C22 other end ground connection, voltage-stablizer N5 2 pin ground connection, 4 pin connect electricity Holding C18 one end, the electric capacity C18 other end connects voltage-stablizer N5 5 pin, electric capacity C16, electric capacity C17 one end respectively, electric capacity C16, Electric capacity C17 other end ground connection；LNA filter circuit is connected as：For amplifier N1 1 pin as signal input part, 2 pin connect electric capacity C1 one end and power supply Circuit voltage stabilizer N2 5 pin, electric capacity C1 other end ground connection, amplifier N1 3 pin connect wave filter Z1 2 pin, and N1 4 pin connect Ground, wave filter Z1 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin connect amplifier N3 3 pin, amplifier N3 1 pin, 4 by electric capacity C2 Pin is grounded, and 2 pin connect inductance L1, electric capacity C3 one end respectively, and the inductance L1 other end meets electric capacity C4, electric capacity C5, electric capacity C6 respectively One end and power input+5V, electric capacity C4, electric capacity C5, electric capacity C6 other ends ground connection, electric capacity C3 another termination wave filter Z2 2 pin, wave filter Z2 1 pin, 3 pin, 4 pin, 6 pin ground connection, 5 pin are connected with interface T1；Lower frequency changer circuit is connected as：Frequency mixer N4 1 pin connects the interface T1 of LNA filter circuit, 2 pin, 4 by electric capacity C14 Pin, 5 pin ground connection, 3 pin connect outside source by electric capacity C15, and 6 pin meet electric capacity C25, electric capacity C26, electric capacity C27 by inductance L2 One end and power circuit voltage-stablizer N5 5 pin, electric capacity C25, electric capacity C26, electric capacity C27 the other end ground connection, the 8 of frequency mixer N4 Pin meets electric capacity C24 and inductance L4 one end, electric capacity C24 other ends ground connection, inductance L4 another termination capacitor C23 by inductance L3 One end；Intermediate frequency filtering and amplifying circuit is connected as：Amplifier N6 1 pin connects the lower frequency changer circuit electric capacity C23 other end, 2 pin, 4 pin Ground connection, 3 pin connect inductance L5, electric capacity C32 one end, and the inductance L5 other end connects electric capacity C28, electric capacity C29, electric capacity C30, electricity respectively Hold C31 and resistance R1 one end, resistance R1 another termination power input+5V, electric capacity C28, electric capacity C29, electric capacity C30, electricity Hold C31 other end ground connection, electric capacity C32 another terminating resistor R2 and resistance R3 one end, resistance R2 other end ground connection, electricity Hinder R3 another terminating resistor R4 and electric capacity C33 one end, resistance R4 other end ground connection, electric capacity C33 another termination filtering Device N7 1 pin, wave filter N7 3 pin, 4 pin, 5 pin, 6 pin, 7 pin, 8 pin, 9 pin, 10 pin, 11 pin, 12 pin ground connection, 2 pin pass through electricity Hold C34 and connect signal output part；Amplifier N1 model WHM14-3020BE, wave filter Z1, Z2 model SF2186E, put Big device N3 model PSA4-5043+, frequency mixer N4 model ADL5350ACPZ-R7, amplifier N6 model AG303-86, filter Ripple device N7 models WPSWB46M52-20.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510875380.8A CN105403898B (en) | 2015-12-03 | 2015-12-03 | A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation |
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| CN201510875380.8A CN105403898B (en) | 2015-12-03 | 2015-12-03 | A kind of radio frequency reception channel circuit for realizing anti-interference antenna of satellite navigation |
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| CN105403898B true CN105403898B (en) | 2017-12-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107181538A (en) * | 2017-06-22 | 2017-09-19 | 天津七六四通信导航技术有限公司 | A kind of intermediate-freuqncy signal power-sensing circuit and detection method |
| CN107124180B (en) * | 2017-06-22 | 2023-12-29 | 天津七六四通信导航技术有限公司 | Improved frequency synthesis circuit implementation method for generating dual-frequency signals |
| CN108254765A (en) * | 2018-04-02 | 2018-07-06 | 成都维星科技有限公司 | A kind of microminiature aviation type GPS anti-interference antennas |
| CN113541771B (en) * | 2021-07-15 | 2022-10-28 | 广西金网通电子科技有限公司 | Satellite down converter for receiving Beidou signal for households |
| CN113992224A (en) * | 2021-10-18 | 2022-01-28 | 安徽蓝讯通信技术有限公司 | Sub-6G-LTCC radio frequency front end microsystem module |
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