CN109257057A - A kind of ultra wide band Superheterodyne receiving system - Google Patents
A kind of ultra wide band Superheterodyne receiving system Download PDFInfo
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- CN109257057A CN109257057A CN201811322135.4A CN201811322135A CN109257057A CN 109257057 A CN109257057 A CN 109257057A CN 201811322135 A CN201811322135 A CN 201811322135A CN 109257057 A CN109257057 A CN 109257057A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/006—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
- H04B1/0071—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands using a common intermediate frequency for more than one band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0067—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
- H04B1/0082—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands with a common local oscillator for more than one band
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Superheterodyne Receivers (AREA)
Abstract
The invention discloses a kind of ultra wide band Superheterodyne receiving systems.The system includes receiving front-end, 0.38-2GHz receiving channel, 2-6GHz receiving channel, 6-18GHz receiving channel, 18-40GHz receiving channel, local oscillator source circuit, processing circuitry of intermediate frequency and shielding box body.The system passes through antenna for the frequency signal reception within the scope of external 0.38-40GHz to inside, by the way that in switching to each road receiving channel, then frequency mixer is moved other signal frequencies to 6-18GHz frequency range by sharing a 12GHz local vibration source in each road receiving channel；Signal is after integration in each road receiving channel, by switching to processing circuitry of intermediate frequency, completes signal processing, final output intermediate-freuqncy signal by sharing a 6-18GHz processing circuitry of intermediate frequency.The present invention has the advantages that integrated level is high, small in size, working frequency range is wide, indicator consilience is high, and application prospect is extensive.
Description
Technical field
The invention belongs to microwave technical field, especially a kind of ultra wide band Superheterodyne receiving system.
Background technique
Superheterodyne receiving system occupies in the numerous areas system such as current radar, communication, navigation, remote control and electronic warfare
Very important status.After reception system is received external electromagnetic wave frequency spectrum by antenna, signal is removed by frequency conversion
After moving on to the lower intermediate frequency of frequency, then carry out Digital Signal Processing.Superheterodyne receiving system is the critical component of reception system,
The superiority of performance plays critical effect to whole system performance, so to Superheterodyne receiving system, especially ultra wide band
The demand of Superheterodyne receiving system is increasing.
Since 0.38-40GHz band limits covers a octaves up to a hundred, need to carry out signal by switch filter group
Sorting avoids generating chaff component, and the signal after segmentation carries out repeatedly being mixed to obtain respectively with the local oscillation signal in respective channel
Intermediate-freuqncy signal.Antenna receives signal, signal is divided into five sections: 0.38-2GHz, 2-6GHz, 6-18GHz, 18-30GHz
With five receiving channels of 30-40GHz, so frequency conversion in channel needs many local vibration sources to provide local oscillation signal, not only at
Originally it is significantly increased, also can be very lengthy and tedious on spatial arrangement, it is unable to satisfy Miniaturization Design.
Summary of the invention
The purpose of the present invention is to provide a kind of integrated level height, the 0.38-40GHz ultra wide band superheterodyne reception of superior performance
System.
The technical solution for realizing the aim of the invention is as follows: a kind of ultra wide band Superheterodyne receiving system, including receiving front-end,
0.38-2GHz receiving channel, 2-6GHz receiving channel, 6-18GHz receiving channel, 18-40GHz receiving channel, local oscillator source circuit,
Processing circuitry of intermediate frequency, in which:
The receiving front-end receives the frequency signal within the scope of external 0.38-40GHz by antenna, and by received letter
Number by switching to each road receiving channel；
The local oscillator source circuit includes a 12GHz local vibration source, and exports three road signals, the three roads signal by power splitter
It is exported respectively to 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel；
The 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel, the three tunnels receiving channel
In frequency mixer by share local oscillator source circuit in 12GHz local vibration source, the signal frequency of the receiving channel is adjusted to 6-
In 18GHz frequency range；
The processing circuitry of intermediate frequency receives the signal of each road receiving channel input, the road Bing Jiangge signal using switching switch
Pass through a 6-18GHz processing circuitry of intermediate frequency, final output intermediate-freuqncy signal.
Further, which further includes shielding box body, and shielding box body includes upper layer cavity and lower layer's cavity, the reception
Front end, 0.38-2GHz receiving channel, 2-6GHz receiving channel, 6-18GHz receiving channel and the setting of 18-40GHz receiving channel exist
In the cavity of upper layer, the local oscillator source circuit and processing circuitry of intermediate frequency are placed in lower layer's cavity.
Further, the local oscillator source circuit includes sequentially connected 12GHz local vibration source, power splitter and frequency multiplier, function point
The output of device is respectively that 0.38-2GHz receiving channel, the frequency mixer in 2-6GHz receiving channel provide local oscillation signal, frequency multiplier
Output provides local oscillation signal for the frequency mixer in 18-40GHz receiving channel, adjusts for the signal frequency to receiving channel
It is whole.
Further, the receiving front-end includes sequentially connected antenna, limiter and first switch, and the antenna will be outer
Signal within the scope of portion 0.38-40GHz is received to receiving front-end, and signal is switched to after limiter clipping by first switch
Subsequent each road receiving channel.
Further, the 0.38-2GHz receiving channel includes sequentially connected 0.38-2GHz bandpass filter, first
Low-noise amplifier, 0.38-2GHz switch filter group, the first frequency mixer, 12.38-14GHz bandpass filter and the second low noise
Acoustic amplifier；
When first switch switches to 0.38-2GHz receiving channel, signal pass through respectively 0.38-2GHz bandpass filter,
First low-noise amplifier, 0.38-2GHz switch filter group, the first frequency mixer, 12.38-14GHz bandpass filter, second
Enter processing circuitry of intermediate frequency after low-noise amplifier, wherein the local oscillation signal of the first frequency mixer is by the 12GHz in local oscillator source circuit
Local vibration source generates, and the main signal that the first frequency mixer and the receiving channel are entered after power splitter is mixed, by the receiving channel
Signal frequency is adjusted to 6-18GHz frequency range.
Further, the 2-6GHz receiving channel includes sequentially connected 2-6GHz bandpass filter, third low noise
Amplifier, 2-6GHz switch filter group, the second frequency mixer, 14-18GHz bandpass filter and the 4th low-noise amplifier；
When first switch switches to 2-6GHz receiving channel, it is low that signal passes through 2-6GHz bandpass filter, third respectively
Noise amplifier, 2-6GHz switch filter group, the second frequency mixer, 14-18GHz bandpass filter, the 4th low-noise amplifier
Enter processing circuitry of intermediate frequency afterwards, wherein the local oscillation signal of the second frequency mixer is generated by the 12GHz local vibration source in local oscillator source circuit, warp
Cross after power splitter and enter the main signal of the second frequency mixer and the receiving channel and be mixed, by the signal frequency of the receiving channel adjust to
In 6-18GHz frequency range.
Further, the 6-18GHz receiving channel includes sequentially connected first 6-18GHz bandpass filter and the 5th
Low-noise amplifier；
When first switch switches to 6-18GHz receiving channel, signal pass through respectively the first 6-18GHz bandpass filter,
Enter processing circuitry of intermediate frequency after 5th low-noise amplifier.
Further, the 18-40GHz receiving channel is divided into the adjustment that two channels carry out signal frequency, a channel
It is mixed including sequentially connected 18-30GHz bandpass filter, the 6th low-noise amplifier, first filter, second switch, third
Frequency device, third switch, the 2nd 6-18GHz bandpass filter and the 7th low-noise amplifier, another channel include being sequentially connected
30-40GHz bandpass filter, the 8th low-noise amplifier, second filter, second switch, third frequency mixer, third open
Pass, 8-18GHz bandpass filter and the 9th low-noise amplifier；
When first switch switches to 18-40GHz receiving channel, signal is divided into the progress of 18-30GHz, 30-40GHz two-way
Mixing:
When second switch, third switching to mono- tunnel 18-30GHz, signal passes through 18-30GHz bandpass filtering respectively
Device, the 6th low-noise amplifier, first filter, second switch, third frequency mixer, third switch, the filter of the 2nd 6-18GHz band logical
Enter processing circuitry of intermediate frequency after wave device, the 7th low-noise amplifier, wherein the local oscillation signal of third frequency mixer is by local oscillator source circuit
In 12GHz local vibration source generate, after power splitter and frequency multiplier, the local oscillation signal of generation enters third frequency mixer and the road
Main signal mixing, by the road, signal frequency is adjusted to 6-18GHz frequency range；
When second switch, third switching to mono- tunnel 30-40GHz, signal passes through 30-40GHz bandpass filtering respectively
Device, the 8th low-noise amplifier, second filter, second switch, third frequency mixer, third switch, 8-18GHz bandpass filtering
Enter processing circuitry of intermediate frequency after device, the 9th low-noise amplifier, wherein the local oscillation signal of third frequency mixer is by local oscillator source circuit
12GHz local vibration source generate, after power splitter and frequency multiplier, the local oscillation signal of generation enters the master of third frequency mixer He the road
Signal mixing, by the road, signal frequency is adjusted to 6-18GHz frequency range.
Further, the processing circuitry of intermediate frequency include it is sequentially connected 4th switch, 6-18GHz switch filter group and
6-18GHz processing circuitry of intermediate frequency, the signal of each road receiving channel output enter 6-18GHz switch filter after the 4th switching
Wave device group, 6-18GHz processing circuitry of intermediate frequency, final output intermediate-freuqncy signal.
Further, the receiving front-end, local oscillator source circuit are all made of integrated multifunction chip, and multifunction chip
For the mmic chip of GaAs technique.
Compared with prior art, the present invention having following remarkable advantage: (1) realizing 0.38-40GHz ultra-wideband microwave letter
Number receive capabilities use integrated multifunction chip in system, have the characteristics that bandwidth, consistency of performance are good；(2) each road
Frequency mixer in receiving channel is uniformly moved signal frequency to 6-18GHz frequency range by sharing a 12GHz local vibration source, respectively
Road receiving channel realizes signal processing by sharing a processing circuitry of intermediate frequency, reduces local vibration source quantity, simplifies circuit,
It is at low cost, integrated level is high；(3) all circuits are all made of advanced micro-group dress hybrid integration technology and carry out production assembly, reduce
Circuit size has the characteristics that working frequency range is wide, small in size, performance is stable, indicator consilience is high, detects suitable for radar, electronics
Examine in all kinds of microwave systems such as electronic countermeasure.
Detailed description of the invention
Fig. 1 is the electrical block diagram of ultra wide band Superheterodyne receiving system of the present invention.
Figure label: 1, antenna；2, limiter；3, first switch；4,0.38-2GHz bandpass filter；5, the first low noise
Acoustic amplifier；6,0.38-2GHz switch filter group；7, the first frequency mixer；8,12.38-14GHz bandpass filter；9, second
Low-noise amplifier；10,2-6GHz bandpass filter；11, third low-noise amplifier；12,2-6GHz switch filter group；
13, the second frequency mixer；14,14-18GHz bandpass filter；15, the 4th low-noise amplifier；16, the first 6-18GHz band logical is filtered
Wave device；17, the 5th low-noise amplifier；18,18-30GHz bandpass filter；19, the 6th low-noise amplifier；20, the first filter
Wave device；21, second switch；22, third frequency mixer；23, third switchs；24, the 2nd 6-18GHz bandpass filter；25, the 7th is low
Noise amplifier；26,30-40GHz bandpass filter；27, the 8th low-noise amplifier；28, second filter；29,8-18GHz
Bandpass filter；30, the 9th low-noise amplifier；31,12GHz local vibration source；32, power splitter；33, frequency multiplier；34, it the 4th opens
It closes；35,6-18GHz switch filter group；36,6-18GHz processing circuitry of intermediate frequency.
Specific embodiment
Ultra wide band Superheterodyne receiving system of the present invention, including receiving front-end, 0.38-2GHz receiving channel, 2-6GHz are received
Channel, 6-18GHz receiving channel, 18-40GHz receiving channel, local oscillator source circuit, processing circuitry of intermediate frequency, in which:
The receiving front-end receives the frequency signal within the scope of external 0.38-40GHz by antenna, and by received letter
Number by switching to each road receiving channel；
The local oscillator source circuit includes a 12GHz local vibration source, and exports three road signals, the three roads signal by power splitter
It is exported respectively to 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel；
The 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel, the three tunnels receiving channel
In frequency mixer by share local oscillator source circuit in 12GHz local vibration source, the signal frequency of the receiving channel is adjusted to 6-
In 18GHz frequency range；
The processing circuitry of intermediate frequency receives the signal of each road receiving channel input, the road Bing Jiangge signal using switching switch
Pass through a 6-18GHz processing circuitry of intermediate frequency, final output intermediate-freuqncy signal.
Further, which further includes shielding box body, and shielding box body includes upper layer cavity and lower layer's cavity, the reception
Front end, 0.38-2GHz receiving channel, 2-6GHz receiving channel, 6-18GHz receiving channel and the setting of 18-40GHz receiving channel exist
In the cavity of upper layer, the local oscillator source circuit and processing circuitry of intermediate frequency are placed in lower layer's cavity.
Further, the local oscillator source circuit includes sequentially connected 12GHz local vibration source 31, power splitter 32 and frequency multiplier
33, the output of power splitter 32 is respectively that 0.38-2GHz receiving channel, the frequency mixer in 2-6GHz receiving channel provide local oscillator letter
Number, the output of frequency multiplier 33 provides local oscillation signal for the frequency mixer in 18-40GHz receiving channel, for the letter to receiving channel
Number frequency is adjusted.
Further, the receiving front-end includes sequentially connected antenna 1, limiter 2 and first switch 3, the antenna 1
Signal within the scope of external 0.38-40GHz is received to receiving front-end, signal passes through first switch 3 after 2 clipping of limiter
Switch to subsequent each road receiving channel.
Further, the 0.38-2GHz receiving channel includes sequentially connected 0.38-2GHz bandpass filter 4, first
Low-noise amplifier 5,0.38-2GHz switch filter group 6, the first frequency mixer 7,12.38-14GHz bandpass filter 8 and second
Low-noise amplifier 9；
When first switch 3 switches to 0.38-2GHz receiving channel, signal passes through 0.38-2GHz bandpass filter respectively
4, the first low-noise amplifier 5,0.38-2GHz switch filter group 6, the first frequency mixer 7,12.38-14GHz bandpass filter
8, enter processing circuitry of intermediate frequency after the second low-noise amplifier 9, wherein the local oscillation signal of the first frequency mixer 7 is by local oscillator source circuit
12GHz local vibration source 31 generate, the main signal that the first frequency mixer 7 and the receiving channel are entered after power splitter 32 is mixed, will
The signal frequency of the receiving channel is adjusted to 6-18GHz frequency range.
Further, the 2-6GHz receiving channel includes sequentially connected 2-6GHz bandpass filter 10, third low noise
Acoustic amplifier 11,2-6GHz switch filter group 12, the second frequency mixer 13,14-18GHz bandpass filter 14 and the 4th low noise
Amplifier 15；
When first switch 3 switches to 2-6GHz receiving channel, signal passes through 2-6GHz bandpass filter 10, third respectively
Low-noise amplifier 11,2-6GHz switch filter group 12, the second frequency mixer 13,14-18GHz bandpass filter the 14, the 4th are low
Enter processing circuitry of intermediate frequency after noise amplifier 15, wherein the local oscillation signal of the second frequency mixer 13 is by local oscillator source circuit
12GHz local vibration source 31 generates, and the main signal that the second frequency mixer 13 and the receiving channel are entered after power splitter 32 is mixed, by this
The signal frequency of receiving channel is adjusted to 6-18GHz frequency range.
Further, the 6-18GHz receiving channel includes sequentially connected first 6-18GHz bandpass filter 16 and
Five low-noise amplifiers 17；
When first switch 3 switches to 6-18GHz receiving channel, signal passes through the first 6-18GHz bandpass filter respectively
16, enter processing circuitry of intermediate frequency after the 5th low-noise amplifier 17.
Further, the 18-40GHz receiving channel is divided into the adjustment that two channels carry out signal frequency, a channel
Including sequentially connected 18-30GHz bandpass filter 18, the 6th low-noise amplifier 19, first filter 20, second switch
21, third frequency mixer 22, third switch 23, the 2nd 6-18GHz bandpass filter 24 and the 7th low-noise amplifier 25, another
Channel includes sequentially connected 30-40GHz bandpass filter 26, the 8th low-noise amplifier 27, second filter 28, second opens
Close 21, third frequency mixer 22, third switch 23,8-18GHz bandpass filter 29 and the 9th low-noise amplifier 30；
When first switch 3 switches to 18-40GHz receiving channel, signal is divided into the progress of 18-30GHz, 30-40GHz two-way
Mixing:
When second switch 21, third switch 23 switch to mono- tunnel 18-30GHz, signal passes through 18-30GHz band logical respectively
Filter 18, the 6th low-noise amplifier 19, first filter 20, second switch 21, third frequency mixer 22, third switch 23,
Enter processing circuitry of intermediate frequency after 2nd 6-18GHz bandpass filter 24, the 7th low-noise amplifier 25, wherein third frequency mixer 22
Local oscillation signal generated by the 12GHz local vibration source 31 in local oscillator source circuit, after power splitter 32 and frequency multiplier 33, the sheet of generation
Vibration signal enters third frequency mixer 22 and the main signal on the road is mixed, and by the road, signal frequency is adjusted to 6-18GHz frequency range；
When second switch 21, third switch 23 switch to mono- tunnel 30-40GHz, signal passes through 30-40GHz band logical respectively
Filter 26, the 8th low-noise amplifier 27, second filter 28, second switch 21, third frequency mixer 22, third switch 23,
Enter processing circuitry of intermediate frequency after 8-18GHz bandpass filter 29, the 9th low-noise amplifier 30, wherein the sheet of third frequency mixer 22
Vibration signal is generated by the 12GHz local vibration source 31 in local oscillator source circuit, and after power splitter 32 and frequency multiplier 33, the local oscillator of generation is believed
The main signal for number entering third frequency mixer 22 and the road is mixed, and by the road, signal frequency is adjusted to 6-18GHz frequency range.
Further, the processing circuitry of intermediate frequency includes sequentially connected 4th switch 34,6-18GHz switch filter group
The signal of 35 and 6-18GHz processing circuitry of intermediate frequency 36, each road receiving channel output enters 6- after the switching of the 4th switch 34
18GHz switch filter group 35,6-18GHz processing circuitry of intermediate frequency 36, final output intermediate-freuqncy signal.
Further, the receiving front-end, local oscillator source circuit are all made of integrated multifunction chip, and multifunction chip
For the mmic chip of GaAs technique.
Embodiment
Technical solution of the present invention is described in further detail below in conjunction with Figure of description.
In conjunction with Fig. 1, ultra wide band Superheterodyne receiving system of the present invention, including receiving front-end, 0.38-2GHz receiving channel, 2-
6GHz receiving channel, 6-18GHz receiving channel, 18-40GHz receiving channel, local oscillator source circuit, processing circuitry of intermediate frequency and shielding box
Body；
The receiving front-end includes sequentially connected antenna 1, limiter 2 and first switch 3；The 0.38-2GHz is received
Channel includes sequentially connected 0.38-2GHz bandpass filter 4, the first low-noise amplifier 5,0.38-2GHz switch filter
The 6, first frequency mixer 7 of group, 12.38-14GHz bandpass filter 8 and the second low-noise amplifier 9；The 2-6GHz receiving channel
Including sequentially connected 2-6GHz bandpass filter 10, third low-noise amplifier 11,2-6GHz switch filter group 12, second
Frequency mixer 13,14-18GHz bandpass filter 14 and the 4th low-noise amplifier 15；The 6-18GHz receiving channel include according to
First 6-18GHz bandpass filter 16 of secondary connection and the 5th low-noise amplifier 17；The 18-40GHz receiving channel is divided into
Two channels carry out moving for signal frequency, and a channel includes that sequentially connected 18-30GHz bandpass filter the 18, the 6th is low
Noise amplifier 19, first filter 20, second switch 21, third frequency mixer 22, third switch 23, the 2nd 6-18GHz band logical
Filter 24 and the 7th low-noise amplifier 25, another channel include sequentially connected 30-40GHz bandpass filter 26,
Eight low-noise amplifiers 27, second filter 28, second switch 21, third frequency mixer 22, third switch 23,8-18GHz band logical
Filter 29 and the 9th low-noise amplifier 30；The local oscillator source circuit includes sequentially connected 12GHz local vibration source 31, power splitter
32 and frequency multiplier 33；The processing circuitry of intermediate frequency includes sequentially connected 4th switch 34,35 and of 6-18GHz switch filter group
6-18GHz processing circuitry of intermediate frequency 36；
The antenna 1 receives the signal within the scope of external 0.38-40GHz to receiving front-end, and signal is limited by limiter 2
Subsequent each road receiving channel is switched to by first switch 3 after width；When first switch 3 switches to 0.38-2GHz receiving channel
When, signal pass through respectively 0.38-2GHz bandpass filter 4, the first low-noise amplifier 5,0.38-2GHz switch filter group 6,
Enter processing circuitry of intermediate frequency after first frequency mixer 7,12.38-14GHz bandpass filter 8, the second low-noise amplifier 9, wherein the
The local oscillation signal of one frequency mixer 7 is generated by the 12GHz local vibration source 31 in local oscillator source circuit, and it is mixed that first is entered after power splitter 32
Frequency device 7 and main signal mixing；When first switch 3 switches to 2-6GHz receiving channel, signal passes through the filter of 2-6GHz band logical respectively
Wave device 10, third low-noise amplifier 11,2-6GHz switch filter group 12, the second frequency mixer 13,14-18GHz bandpass filtering
Enter processing circuitry of intermediate frequency after device 14, the 4th low-noise amplifier 15, wherein the local oscillation signal of the second frequency mixer 13 is by local vibration source
12GHz local vibration source 31 in circuit generates, and the second frequency mixer 13 is entered after power splitter 32 and main signal is mixed；It opens when first
When pass 3 switches to 6-18GHz receiving channel, signal passes through the first 6-18GHz bandpass filter 16, the 5th low noise amplification respectively
Enter processing circuitry of intermediate frequency after device 17；When first switch 3 switches to 18-40GHz receiving channel, signal, which is divided into two-way, to be mixed
Frequently: wherein all the way signal pass through respectively 18-30GHz bandpass filter 18, the 6th low-noise amplifier 19, first filter 20,
Second switch 21, third frequency mixer 22, third switch 23, the 2nd 6-18GHz bandpass filter 24, the 7th low-noise amplifier 25
Enter processing circuitry of intermediate frequency afterwards, in addition signal passes through 30-40GHz bandpass filter 26, the 8th low-noise amplifier respectively all the way
27, second filter 28, second switch 21, third frequency mixer 22, third switch 23,8-18GHz bandpass filter the 29, the 9th are low
Enter processing circuitry of intermediate frequency after noise amplifier 30, wherein the local oscillation signal of third frequency mixer 22 is by local oscillator source circuit
12GHz local vibration source 31 generates, and after power splitter 32 and frequency multiplier 33, generates high-frequency local oscillation signal and enters third frequency mixer 22
It is mixed with main signal；The signal of each road receiving channel output enters processing circuitry of intermediate frequency, enters after the switching of the 4th switch 34
6-18GHz switch filter group 35,6-18GHz processing circuitry of intermediate frequency 36, final output intermediate-freuqncy signal.
As a kind of specific example, the shielding box body is provided with upper layer cavity and lower layer's cavity, before the reception
End, 0.38-2GHz receiving channel, 2-6GHz receiving channel, 6-18GHz receiving channel and 18-40GHz receiving channel are placed on
In layer cavity, the local oscillator source circuit and processing circuitry of intermediate frequency are placed in lower layer's cavity.
As a kind of specific example, the antenna 1, limiter 2, first switch 3 are integrated multifunction chip
1,12GHz local vibration source 31, power splitter 32, frequency multiplier 33 are integrated multifunction chip 2；Multifunction chip 1 and multi-functional
Chip 2 is the mmic chip of GaAs technique, for realizing the amplitude coincidence and phase equalization of radiofrequency signal, is inputted defeated
Impedance is 50 ohm out, does not need additional Circuit Matching.
As a kind of specific example, the 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz are received
The local oscillation signal of the first frequency mixer (7), the second frequency mixer (13) and third frequency mixer (22) in channel is by local oscillator source circuit
It provides.The frequency conversion needs of above-mentioned several receiving channels are only just able to satisfy in system by a 12GHz local vibration source 31, are not only reduced
Cost, and meet the requirement of system compact.
As a kind of specific example, the 0.38-2GHz receiving channel, 2-6GHz receiving channel and 18-40GHz are received
Signal is after mixing in channel, and signal frequency is moved in 6-18GHz frequency range and 6-18GHz receiving channel is received
Signal is switched in processing circuitry of intermediate frequency by the 4th switch 34, final output intermediate-freuqncy signal.Only pass through a 6- in system
18GHz processing circuitry of intermediate frequency 36 can complete IF signal processing, not only simplify circuit, and meet system compact
It is required that.
In conclusion ultra wide band Superheterodyne receiving system of the present invention, realizes 0.38-40GHz ultra-wideband microwave signal and connects
Receive function.Integrated multifunction chip is used in the present invention, has the characteristics that bandwidth, consistency of performance are good.All electricity
Road is all made of advanced micro-group dress hybrid integration technology and carries out production assembly, reduces circuit size.In each road receiving channel
Frequency mixer is uniformly moved signal frequency to 6-18GHz frequency range by sharing a 12GHz local vibration source, greatly reduces local oscillator
Source quantity, reduces costs, and improves integrated level.Each road receiving channel realizes signal by sharing a processing circuitry of intermediate frequency
Processing, simplifies circuit.The present invention has the characteristics that working frequency range is wide, small in size, performance is stable, indicator consilience is high, is applicable in
In all kinds of microwave systems such as radar, electronic reconnaissance and electronic countermeasure, application prospect is very extensive.
Claims (10)
1. a kind of ultra wide band Superheterodyne receiving system, which is characterized in that including receiving front-end, 0.38-2GHz receiving channel, 2-
6GHz receiving channel, 6-18GHz receiving channel, 18-40GHz receiving channel, local oscillator source circuit, processing circuitry of intermediate frequency, in which:
The receiving front-end receives the frequency signal within the scope of external 0.38-40GHz by antenna, and received signal is led to
It crosses in switching to each road receiving channel；
The local oscillator source circuit includes a 12GHz local vibration source, and exports three road signals, three roads signal difference by power splitter
It exports to 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel；
The 0.38-2GHz receiving channel, 2-6GHz receiving channel, 18-40GHz receiving channel, in the three tunnels receiving channel
Frequency mixer is adjusted the signal frequency of the receiving channel to 6-18GHz frequency by sharing the 12GHz local vibration source in local oscillator source circuit
In section；
The processing circuitry of intermediate frequency, the signal of each road receiving channel input is received using switching switch, and the road Bing Jiangge signal passes through
One 6-18GHz processing circuitry of intermediate frequency, final output intermediate-freuqncy signal.
2. ultra wide band Superheterodyne receiving system according to claim 1, which is characterized in that the system further includes shielding box
Body, shielding box body include upper layer cavity and lower layer's cavity, and the receiving front-end, 0.38-2GHz receiving channel, 2-6GHz receive logical
Road, 6-18GHz receiving channel and 18-40GHz receiving channel are arranged in the cavity of upper layer, the local oscillator source circuit and IF process
Circuit is placed in lower layer's cavity.
3. ultra wide band Superheterodyne receiving system according to claim 2, which is characterized in that the local oscillator source circuit include according to
12GHz local vibration source (31), power splitter (32) and the frequency multiplier (33) of secondary connection, the output of power splitter (32) is respectively 0.38-
Frequency mixer in 2GHz receiving channel, 2-6GHz receiving channel provides local oscillation signal, and the output of frequency multiplier (33) is 18-40GHz
Frequency mixer in receiving channel provides local oscillation signal, is adjusted for the signal frequency to receiving channel.
4. ultra wide band Superheterodyne receiving system according to claim 3, which is characterized in that the receiving front-end includes successively
Antenna (1), limiter (2) and the first switch (3) of connection, the antenna (1) is by the signal within the scope of external 0.38-40GHz
It receives to receiving front-end, signal is switched to subsequent each road and received after limiter (2) clipping by first switch (3) to be led to
Road.
5. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the 0.38-2GHz receives logical
Road includes sequentially connected 0.38-2GHz bandpass filter (4), the first low-noise amplifier (5), 0.38-2GHz switch filtering
Device group (6), the first frequency mixer (7), 12.38-14GHz bandpass filter (8) and the second low-noise amplifier (9)；
When first switch (3) switches to 0.38-2GHz receiving channel, signal passes through 0.38-2GHz bandpass filter respectively
(4), the first low-noise amplifier (5), 0.38-2GHz switch filter group (6), the first frequency mixer (7), 12.38-14GHz band
Bandpass filter (8), the second low-noise amplifier (9) enter processing circuitry of intermediate frequency afterwards, wherein the local oscillation signal of the first frequency mixer (7)
It is generated by the 12GHz local vibration source (31) in local oscillator source circuit, the first frequency mixer (7) and the reception is entered after power splitter (32)
The main signal in channel is mixed, and the signal frequency of the receiving channel is adjusted to 6-18GHz frequency range.
6. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the 2-6GHz receiving channel packet
Include sequentially connected 2-6GHz bandpass filter (10), third low-noise amplifier (11), 2-6GHz switch filter group (12),
Second frequency mixer (13), 14-18GHz bandpass filter (14) and the 4th low-noise amplifier (15)；
When first switch (3) switches to 2-6GHz receiving channel, signal passes through 2-6GHz bandpass filter (10), third respectively
Low-noise amplifier (11), 2-6GHz switch filter group (12), the second frequency mixer (13), 14-18GHz bandpass filter
(14), the 4th low-noise amplifier (15) enters processing circuitry of intermediate frequency afterwards, wherein the local oscillation signal of the second frequency mixer (13) is by this
12GHz local vibration source (31) in vibration source circuit generates, and the second frequency mixer (13) are entered after power splitter (32) and the reception is logical
The main signal in road is mixed, and the signal frequency of the receiving channel is adjusted to 6-18GHz frequency range.
7. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the 6-18GHz receiving channel
Including sequentially connected first 6-18GHz bandpass filter (16) and the 5th low-noise amplifier (17)；
When first switch (3) switches to 6-18GHz receiving channel, signal passes through the first 6-18GHz bandpass filter respectively
(16), the 5th low-noise amplifier (17) enters processing circuitry of intermediate frequency afterwards.
8. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the 18-40GHz receiving channel
Be divided into the adjustment that two channels carry out signal frequency, a channel include sequentially connected 18-30GHz bandpass filter (18),
6th low-noise amplifier (19), first filter (20), second switch (21), third frequency mixer (22), third switch (23),
2nd 6-18GHz bandpass filter (24) and the 7th low-noise amplifier (25), another channel include sequentially connected 30-
40GHz bandpass filter (26), the 8th low-noise amplifier (27), second filter (28), second switch (21), third mixing
Device (22), third switch (23), 8-18GHz bandpass filter (29) and the 9th low-noise amplifier (30)；
When first switch (3) switches to 18-40GHz receiving channel, signal, which is divided into 18-30GHz, 30-40GHz two-way, to be mixed
Frequently:
When second switch (21), third switch (23) switch to mono- tunnel 18-30GHz, signal passes through 18-30GHz band logical respectively
Filter (18), the 6th low-noise amplifier (19), first filter (20), second switch (21), third frequency mixer (22),
Three switches (23), the 2nd 6-18GHz bandpass filter (24), the 7th low-noise amplifier (25) enter processing circuitry of intermediate frequency afterwards,
Wherein the local oscillation signal of third frequency mixer (22) is generated by the 12GHz local vibration source (31) in local oscillator source circuit, by power splitter
(32) and after frequency multiplier (33), the local oscillation signal of generation enters third frequency mixer (22) and the main signal mixing on the road, by the road
Signal frequency is adjusted to 6-18GHz frequency range；
When second switch (21), third switch (23) switch to mono- tunnel 30-40GHz, signal passes through 30-40GHz band logical respectively
Filter (26), the 8th low-noise amplifier (27), second filter (28), second switch (21), third frequency mixer (22),
Three switches (23), 8-18GHz bandpass filter (29), the 9th low-noise amplifier (30) enter processing circuitry of intermediate frequency afterwards, wherein
The local oscillation signal of third frequency mixer (22) is generated by the 12GHz local vibration source (31) in local oscillator source circuit, by power splitter (32) and
After frequency multiplier (33), the local oscillation signal of generation enters third frequency mixer (22) and the main signal mixing on the road, by the road signal frequency
Rate is adjusted to 6-18GHz frequency range.
9. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the processing circuitry of intermediate frequency includes
Sequentially connected 4th switch (34), 6-18GHz switch filter group (35) and 6-18GHz processing circuitry of intermediate frequency (36), each road
The signal of receiving channel output is after the 4th switch (34) switching into 6-18GHz switch filter group (35), in 6-18GHz
Frequency processing circuit (36), final output intermediate-freuqncy signal.
10. ultra wide band Superheterodyne receiving system according to claim 4, which is characterized in that the receiving front-end, local vibration source
Circuit is all made of integrated multifunction chip, and multifunction chip is the mmic chip of GaAs technique.
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| CN114614839A (en) * | 2022-03-04 | 2022-06-10 | 电子科技大学 | Multichannel Ka wave band front end subassembly |
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