CN105281675A - Down-conversion module with ultra-wide and large instantaneous bandwidth and frequency conversion method thereof - Google Patents
Down-conversion module with ultra-wide and large instantaneous bandwidth and frequency conversion method thereof Download PDFInfo
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- CN105281675A CN105281675A CN201510815364.XA CN201510815364A CN105281675A CN 105281675 A CN105281675 A CN 105281675A CN 201510815364 A CN201510815364 A CN 201510815364A CN 105281675 A CN105281675 A CN 105281675A
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Abstract
The present invention discloses a down-conversion module with ultra-wide and large instantaneous bandwidth and a frequency conversion method thereof. The circuit structure of the down-conversion module with ultra-wide and large instantaneous bandwidth comprises a low-frequency stage double conversion branch, a high-frequency stage double conversion branch, a single-pole double-throw switch S1, and an intermediate-frequency amplification branch. The low-frequency stage double conversion branch and the high-frequency stage double conversion branch are symmetrical structures; one end of the low-frequency stage double conversion branch and one end of the high-frequency stage double conversion branch are configured to receive radio-frequency signals, and the other end of the low-frequency stage double conversion branch and the other end of the high-frequency stage double conversion branch are configured to connect with the single-pole double-throw switch S1; and the single-pole double-throw switch S1 is configured to select one of the low-frequency stage double conversion branch and the high-frequency stage double conversion branch to connect with the intermediate-frequency amplification branch. The down-conversion module with ultra-wide and large instantaneous bandwidth has the advantages of high integration density, light weight, small size, low cost, high reliability, good manufacturability and the like. The present invention further discloses a frequency conversion method of a down-conversion module with ultra-wide and large instantaneous bandwidth.
Description
Technical field
The present invention relates to a kind of frequency-variable module and conversion method thereof, relate to the large instant bandwidth down conversion method of ultra broadband of a kind of ultra broadband large instant bandwidth down conversion module and described ultra broadband large instant bandwidth down conversion module especially.
Background technology
Along with the development of electronic information technology, signal band is more and more wider.Broadband receiver is as the front equipment end of obtaining information, and demand is more and more stronger.Simultaneously, for simplifying system, it is desirable to carry out unified digital intermediate frequency signal process to each frequency band signals, also very strong to the demand of broadband receiver, its technical indicator and environmental suitability require also more and more higher, can say that the performance of receiver plays extremely important effect to acquisition of information.Wherein down conversion module is exactly most important part wherein.
The general bandwidth of down conversion module in normal radar is narrower, adopts packaging, printed microstrip circuit board, uses common welding or Surface Mount welding technology to carry out device assembling.Phased array radar due to unit numerous, very high to the integrated level of single passage, volume, weight demands, if adopt the frequency conversion channel that traditional surface mounting component is formed, ghost effect is large, index cannot ensure, and cannot meet high integration, the requirement that lightweight, volume is little.Therefore, the design carrying out frequency conversion channel should take into full account the factors such as integrated level, reliability, volume, weight, cost, manufacturability.
The Electronic Assembly Foundation of new generation grown up on the basis of semiconductor integrated circuit technology, hybrid-intergated-circuit technique and surface installation technique (SMT) since Micro-package technique is the nineties.Micro-package technique is on high-density multi-layered interconnect substrates, microwelding and packaging technology is adopted to assemble various microminiaturized chip components and parts and semiconductor integrated circuit chip, the technology of the advanced microelectronic assembly of formation high density, high speed, highly reliable 3-D solid structure.
Summary of the invention
The object of the present invention is to provide the large instant bandwidth down conversion method of ultra broadband of a kind of ultra broadband large instant bandwidth down conversion module and described ultra broadband large instant bandwidth down conversion module, it has high integration, lightweight, volume is little, cost is low, reliability is high and have the advantages such as good manufacturability.
The present invention is achieved through the following technical solutions: the large instant bandwidth down conversion module of a kind of ultra broadband, and on circuit structure, it comprises low-frequency range double conversion branch road, high band double conversion branch road, single-pole double-throw switch (SPDT) S1, intermediate frequency amplification branch road; Described low-frequency range double conversion branch road and described high band double conversion branch road are symmetrical structure, the equal received RF signal in one end of two double conversion branch roads, the other end of two double conversion branch roads all connects single-pole double-throw switch (SPDT) S1, selects one of them double conversion branch road to be connected to described intermediate frequency amplify branch road by single-pole double-throw switch (SPDT) S1.
As the further improvement of such scheme, described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1; One end of amplifier A1 is as the input of described radiofrequency signal, and the other end of amplifier A1 connects single-pole double-throw switch (SPDT) S1 via standing wave device N1, frequency converter M1, standing wave device N2, amplifier A2, filter Z1, standing wave device N3, frequency converter M2, standing wave device N4 successively; One end of amplifier A3 is as the input of the local oscillation signal of frequency converter M1, and the other end of amplifier A3 connects frequency converter M1 via standing wave device N5; One end of amplifier A4 is as the input of the local oscillation signal of frequency converter M2, and the other end of amplifier A4 connects frequency converter M2 via standing wave device N6.
As the further improvement of such scheme, described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; One end of amplifier A5 connects single-pole double-throw switch (SPDT) S1, the other end of amplifier A5 connects one end of filter Z3 successively via filter Z2, amplifier A6, standing wave device N7, amplifier A7, the other end of filter Z3 amplifies the signal output part of branch road as described intermediate frequency.
As the further improvement of such scheme, in mechanical structure, the cavity of the large instant bandwidth down conversion module of described ultra broadband adopts the mode in point chamber to be up and down divided into epicoele, cavity of resorption, adopts insulator to wearing connection between epicoele, cavity of resorption.
Further, described epicoele arranges inner cover plate, outer cover plate from inside to outside, and described outer cover plate sealing adopts Laser seal welding, and uses Al-alloy casing to shield and sealing.
Preferably, described epicoele is provided with power supply, insulator, microwave signal line, control and power interface, connection between described power supply and described insulator uses gold ball bonding to carry out bonding, described microwave signal line adopts spun gold wedge bonding to carry out bonding, and described control and power interface are connected with micro-band plate of described cavity of resorption by J30J.
The present invention also provides the large instant bandwidth down conversion method of ultra broadband of above-mentioned ultra broadband large instant bandwidth down conversion module, on circuit, be high band and low-frequency range by the frequency partition of radiofrequency signal, a road intermediate-freuqncy signal is exported by single-pole double-throw switch (SPDT) S1 after double conversion, wherein, low-frequency range double conversion be described radiofrequency signal after the double conversion of low-frequency range double conversion branch road, then amplify the process of branch road by single-pole double-throw switch (SPDT) S1 to intermediate frequency; High band double conversion be described radiofrequency signal after the double conversion of high band double conversion branch road, then amplified the process of branch road to described intermediate frequency by single-pole double-throw switch (SPDT) S1; It is the process of intermediate-freuqncy signal being carried out filter and amplification that described intermediate frequency amplifies branch road; The signal transmission direction that described intermediate frequency amplifies branch road is contrary with the signal transmission direction of two double conversion branch roads.
As the further improvement of such scheme, described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1, described radiofrequency signal is amplified through amplifier A1, enter standing wave device N1 to deliver to frequency converter M1 carry out frequency conversion through improving stationary wave characteristic, local oscillation signal needed for frequency converter M1 amplifies through amplifier A3, frequency converter M1 is reached after the adjustment of standing wave device N5 standing wave, downconvert to an intermediate frequency, then stationary wave characteristic is adjusted through standing wave device N2, amplify through amplifier A2, again after band pass filter Z1 filtering interfering, stationary wave characteristic is improved through standing wave device N3, enter frequency converter M2 and carry out frequency conversion, the local oscillation signal of frequency converter M2 amplifies through amplifier A4, frequency converter M2 is reached after the adjustment of standing wave device N6 standing wave, after being converted to two intermediate frequencies, improve standing wave through standing wave device N4 and enter single-pole double-throw switch (SPDT) S1, enter described intermediate frequency and amplify branch road.
As the further improvement of such scheme, described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; Two intermediate-freuqncy signals from low-frequency range frequency conversion branch road and high band frequency conversion branch road enter intermediate frequency amplification branch road through single-pole double-throw switch (SPDT) S1, amplify through amplifier A5, again after low pass filter Z2 filtering local oscillator and high frequency intermodulation, enter amplifier A6 to amplify, improve stationary wave characteristic through standing wave device N7 to deliver to amplifier A7 and amplify, export intermediate-freuqncy signal through band pass filter Z3.
As the further improvement of such scheme, in structural manufacturing process, adopting the mode in point chamber to be up and down divided into epicoele, cavity of resorption the cavity of large for described ultra broadband instant bandwidth down conversion module, between epicoele, cavity of resorption, adopting insulator to wearing connection; Described epicoele arranges inner cover plate, outer cover plate from inside to outside, and described outer cover plate sealing adopts Laser seal welding, and uses Al-alloy casing to shield and sealing; Described epicoele is provided with power supply, insulator, microwave signal line, control and power interface, connection between described power supply and described insulator uses gold ball bonding to carry out bonding, described microwave signal line adopts spun gold wedge bonding to carry out bonding, and described control and power interface are connected with micro-band plate of described cavity of resorption by J30J.
The present invention compared with prior art, has following apparent outstanding substantive distinguishing features and remarkable advantage:
1. ultra broadband, large instant bandwidth, applied widely, all working frequency is within 0.8GHz ~ 18GHz, and the frequency conversion channel of instant bandwidth within 1.2GHz all can use this module;
2. adopt segmentation frequency conversion, make the frequency after a mixing be unlikely to too high, reduce difficulty of processing, develop skill index;
3. adopt the design of narrow cavity configuration, avoid cavity effect to produce self-excitation;
4. technique adopts MCM multi-chip high density packaging technique, Laser seal welding technology, insulator solder technology, gold ball bonding, pressure welding bonding techniques.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of the large instant bandwidth down conversion module of ultra broadband of the present invention.
Fig. 2 is the mechanical structure cutaway view of the large instant bandwidth down conversion module of ultra broadband of the present invention.
Fig. 3 is the test chart of the large instant bandwidth down conversion module of ultra broadband of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
The present invention adopts the novel Micro-package technique under background technology, carries out innovative design to down conversion module, further reduced volume and weight, reduces components and parts number kind, reduces costs, thus meet the needs of broadband DBF receiver.The double conversion module designed thus, can be widely used in, in military, communication bandwidth receiver system, having wide range of application.Two aspects are the present invention relates to: the improvement in radio-frequency receiving system in the circuit form of frequency conversion channel and structural manufacturing process.The present invention can be used in the double conversion passage in radio-frequency receiving system, embody rule, at military aspect, can be applicable in the double conversion passage of the broadband receivers such as electronic warfare reconnaissance, SAR, phased array radar, in civilian, can be applicable in the double conversion passage of commerical radar, wide-band communication system.
Design of the present invention is as follows.
On circuit: be high band and low-frequency range by frequency partition, exporting a road intermediate-freuqncy signal by single-pole double-throw switch (SPDT) after double conversion, is high band and low-frequency range by frequency partition, makes the frequency after a mixing be unlikely to too high, reduce difficulty of processing, develop skill index; Adopt narrow cavity configuration, avoid cavity effect to produce self-excitation; Box body adopts and divides the method in chamber up and down, and utilize insulator to wearing connection between two-layer up and down, RF isolation and SMP employing airtight construction, ensure that the air-tightness of epicoele.Adopt J30J socket, solve the problem of to be connected with system feed and control; In addition, design down conversion module all selects broadband device, and all working frequency is within 0.8GHz ~ 18GHz, and the frequency conversion channel of instant bandwidth within 1.2GHz all can use this module.
In structural manufacturing process: module divides upper and lower chamber, epicoele has inner cover plate, outer cover plate, outer cover plate sealing adopts Laser seal welding, use Al-alloy casing shielding and sealing, weld between substrate with Al-alloy casing and adopt large-area brazing technology, multiple 5880 substrates carry out integrated design, multiple substrate uses multi-chip high density packaging technique, control signal and power supply are connected with insulator and use gold ball bonding to carry out bonding, microwave signal adopts spun gold wedge bonding to carry out bonding, and control and power interface are connected with the micro-band plate of cavity of resorption by J30J.
The formation of the large instant bandwidth down conversion module of ultra broadband:
◆ divide from circuit function, comprising:
Low-frequency range double conversion branch road;
High band double conversion branch road;
Intermediate frequency amplifies branch road;
Power board;
◆ divide from structural manufacturing process, comprising:
The chip components and parts such as bare chip, Surface Mount IC;
5880 substrates;
4003 substrates;
Al-alloy casing;
Inner cover plate, upper cover plate, lower cover.
Described down conversion module operating frequency 0.8GHz ~ 18GHz, instant bandwidth 1.2GHz, ultra broadband, large instant bandwidth, intermodulation suppresses to be greater than 50dB, and rising and falling in band is less than 3dB.Be high band and low-frequency range by frequency partition, after double conversion, export a road intermediate-freuqncy signal by single-pole double-throw switch (SPDT); Adopt narrow cavity configuration, ensure that the isolation of signal.Adopt SMP and sintering insulated son, ensure that the air-tightness of radio system.
Refer to Fig. 1, the large instant bandwidth down conversion module of ultra broadband of the present embodiment, on circuit structure, it comprises low-frequency range double conversion branch road, high band double conversion branch road, single-pole double-throw switch (SPDT) S1, intermediate frequency amplification branch road.Described low-frequency range double conversion branch road and described high band double conversion branch road are symmetrical structure, the equal received RF signal in one end of two double conversion branch roads, the other end of two double conversion branch roads all connects single-pole double-throw switch (SPDT) S1, selects one of them double conversion branch road to be connected to described intermediate frequency amplify branch road by single-pole double-throw switch (SPDT) S1.
On circuit, be high band and low-frequency range by the frequency partition of radiofrequency signal, a road intermediate-freuqncy signal is exported by single-pole double-throw switch (SPDT) S1 after double conversion, wherein, low-frequency range double conversion be described radiofrequency signal after the double conversion of low-frequency range double conversion branch road, then amplify the process of branch road by single-pole double-throw switch (SPDT) S1 to intermediate frequency; High band double conversion be described radiofrequency signal after the double conversion of high band double conversion branch road, then amplified the process of branch road to described intermediate frequency by single-pole double-throw switch (SPDT) S1; It is the process of intermediate-freuqncy signal being carried out filter and amplification that described intermediate frequency amplifies branch road; The signal transmission direction that described intermediate frequency amplifies branch road is contrary with the signal transmission direction of two double conversion branch roads.
That is, Fig. 1 is ultra broadband of the present invention large instant bandwidth down conversion module theory diagram, is the theory diagram of institute's foundation when the present invention designs; Adopt segmentation frequency conversion, low-frequency range is 0.8GHz ~ 6GHz, and high band is 6GHz ~ 18GHz; Low-frequency range double conversion is radiofrequency signal amplifies branch road to intermediate frequency by single-pole double-throw switch (SPDT) process through double conversion, and high band double conversion is radiofrequency signal amplifies branch road to intermediate frequency by single-pole double-throw switch (SPDT) process through double conversion; It is the process of intermediate-freuqncy signal being carried out filter and amplification that intermediate frequency amplifies branch road.High band double conversion branch road and low-frequency range double conversion branch road are symmetrical structures, and therefore, two kinds of frequency mixers of double conversion need select the frequency mixer of symmetrical structure; In order to reduce size, cost-saving, the signal transmission direction that intermediate frequency amplifies branch road is contrary with the transmission direction of double conversion branch road, and the gain that public passage (intermediate frequency amplification branch road) distributes is higher.
Operating frequency 0.8GHz ~ the 18GHz of described module, instant bandwidth 1.2GHz, all working frequency is within 0.8GHz ~ 18GHz, and the frequency conversion channel of instant bandwidth within 1.2GHz all can use this module.Low-frequency range double conversion circuit form in described module, low-frequency range radiofrequency signal, through amplification, a mixing, stationary wave characteristic adjustment, filtering, secondary mixing, forms low-frequency range two intermediate-freuqncy signal.High band double conversion circuit form in described module, high band radiofrequency signal, through amplification, a mixing, stationary wave characteristic adjustment, filtering, secondary mixing, forms high band two intermediate-freuqncy signal.Describedly in module, use the high and low frequency range frequency conversion function of MCM technology settling signal, export a road intermediate-freuqncy signal by single-pole double-throw switch (SPDT) after double conversion and enter intermediate frequency and amplify branch road.Described module internal intermediate frequency amplifying circuit form, amplifies the intermediate-freuqncy signal of single-pole double-throw switch (SPDT) incision, after standing wave adjustment and filtering, then to amplify, enter cavity of resorption, after filtering, export intermediate-freuqncy signal by RF isolation.
Described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1; One end of amplifier A1 is as the input of described radiofrequency signal, and the other end of amplifier A1 connects single-pole double-throw switch (SPDT) S1 via standing wave device N1, frequency converter M1, standing wave device N2, amplifier A2, filter Z1, standing wave device N3, frequency converter M2, standing wave device N4 successively; One end of amplifier A3 is as the input of the local oscillation signal of frequency converter M1, and the other end of amplifier A3 connects frequency converter M1 via standing wave device N5; One end of amplifier A4 is as the input of the local oscillation signal of frequency converter M2, and the other end of amplifier A4 connects frequency converter M2 via standing wave device N6.
Described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1, described radiofrequency signal is amplified through amplifier A1, enter standing wave device N1 to deliver to frequency converter M1 carry out frequency conversion through improving stationary wave characteristic, local oscillation signal needed for frequency converter M1 amplifies through amplifier A3, frequency converter M1 is reached after the adjustment of standing wave device N5 standing wave, downconvert to an intermediate frequency, then stationary wave characteristic is adjusted through standing wave device N2, amplify through amplifier A2, again after band pass filter Z1 filtering interfering, stationary wave characteristic is improved through standing wave device N3, enter frequency converter M2 and carry out frequency conversion, the local oscillation signal of frequency converter M2 amplifies through amplifier A4, frequency converter M2 is reached after the adjustment of standing wave device N6 standing wave, after being converted to two intermediate frequencies, improve standing wave through standing wave device N4 and enter single-pole double-throw switch (SPDT) S1, enter described intermediate frequency and amplify branch road.
Due to low-frequency range double conversion branch road and high band double conversion branch structure symmetry, therefore high band double conversion branch road: from switch filter group high band radiofrequency signal through filtering spuious and interference after, enter down conversion module inside, amplify through A8, enter N8 to deliver to frequency converter M3 carry out frequency conversion through improving stationary wave characteristic, needed for M3, local oscillation signal is sent into by outside, reaches local oscillator level needed for frequency mixer after A10, N12.Downconvert to an intermediate frequency, then stationary wave characteristic is adjusted through N9, amplify through A9, again after band pass filter Z4 filtering interfering, improve stationary wave characteristic through N10, enter double down converter M4 and carry out down-conversion, the local oscillation signal of M4 is sent into by outside, amplify through A11, after the adjustment of N13 standing wave, reach local oscillator level needed for frequency mixer.After being converted to two intermediate frequencies, improving standing wave through N11 and enter single-pole double-throw switch (SPDT), enter common branch (intermediate frequency amplification branch road).
Described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; One end of amplifier A5 connects single-pole double-throw switch (SPDT) S1, the other end of amplifier A5 connects one end of filter Z3 successively via filter Z2, amplifier A6, standing wave device N7, amplifier A7, the other end of filter Z3 amplifies the signal output part of branch road as described intermediate frequency.
Described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; Two intermediate-freuqncy signals from low-frequency range frequency conversion branch road and high band frequency conversion branch road enter intermediate frequency amplification branch road through single-pole double-throw switch (SPDT) S1, amplify through amplifier A5, again after low pass filter Z2 filtering local oscillator and high frequency intermodulation, enter amplifier A6 to amplify, improve stationary wave characteristic through standing wave device N7 to deliver to amplifier A7 and amplify, export intermediate-freuqncy signal through band pass filter Z3.
Incorporated by reference to Fig. 2, in structural manufacturing process, the cavity of the large instant bandwidth down conversion module of described ultra broadband adopts the mode in point chamber to be up and down divided into epicoele, cavity of resorption, adopts insulator to wearing connection between epicoele, cavity of resorption; Described epicoele arranges inner cover plate, outer cover plate from inside to outside, and described outer cover plate sealing adopts Laser seal welding, and uses Al-alloy casing to shield and sealing; Described epicoele is provided with power supply, insulator, microwave signal line, control and power interface, connection between described power supply and described insulator uses gold ball bonding to carry out bonding, described microwave signal line adopts spun gold wedge bonding to carry out bonding, and described control and power interface are connected with micro-band plate of described cavity of resorption by J30J.
In Fig. 2, interface frequently: RF1, RF2,1LO1,1LO2,2LO1,2LO2, IF.(note: RF1 is low-frequency range rf input port, RF2 is high band rf input port, 1LO1 is low-frequency range one local oscillator, 1LO2 is low-frequency range two local oscillator, 2LO1 is high band one local oscillator, 2LO2 is high band two local oscillator, and IF is intermediate frequency delivery outlet), 9 core Energy control interfaces :+5V, TTL ,-5V, GND.
Refer to Fig. 3, combined circuit combines and mechanical structure, and each large feature of the present invention is as follows:
1. frequency partition is high band and low-frequency range by building block technique feature: operating frequency 0.8GHz ~ 18GHz, instant bandwidth 1.2GHz, exports a road intermediate-freuqncy signal after double conversion by single-pole double-throw switch (SPDT);
2. modular structure feature: bare chip and surface mounting component mixed contact structure; Narrow cavity configuration; Al-alloy casing, welds between substrate with Al-alloy casing and adopts large-area welding; Divide chamber up and down, sintering insulated sub-connection is used in centre;
3. module process feature: eutectic weldering, pricker soldering, Reflow Soldering, spun gold wedge bonding, gold ball bonding, Laser Welding, conducting resinl electrical connection, insulating cement are fixed.
Wherein, described modular structure form: divide chamber up and down, middle connected with insulator; Epicoele radio frequency part adopts narrow cavity configuration.
Described modular structure feature: surface is installed, Al-alloy casing, size: 100 × 80 × 20mm
3; Power supply is externally connected by 9 core sockets with control signal; Low-band signal is externally connected by the blind mouth that connects of SMP with high frequency band signal; All the other microwave signals are connected with the external world with radio frequency connector by RF isolation.
Described module process form: eutectic weldering, pricker soldering, Reflow Soldering, spun gold wedge bonding, gold ball bonding, Laser Welding, conducting resinl electrical connection, insulating cement are fixed.
Described module process feature: adopt eutectic to weld between bare chip and molybdenum copper substrate; The soldering of large area pricker is adopted between the micro-band plate of RO5880 and Al-alloy casing; Surface Mount components and parts adopt Reflow Soldering; Radio-frequency transmission line and bare chip electrical connection adopt spun gold wedge bonding; Gold ball bonding is adopted between the electricity supply and control of bare chip and insulator; Be bonded on Al-alloy casing by conducting resinl after bare chip and the welding of molybdenum copper substrate; Fixedly the needing of some components and parts is fixed with insulating cement; Al-alloy casing adopts Laser Welding airtight to guarantee.
In sum, the large instant bandwidth down conversion module of Novel ultra wide band disclosed by the invention, operating frequency 0.8GHz ~ 18GHz, instant bandwidth 1.2GHz.Electricity principle comprises: low-frequency range double conversion branch road, high band double conversion branch road, enter intermediate frequency by single-pole double-throw switch (SPDT) and amplify branch road; Structure comprises: narrow cavity configuration, bare chip and surface mounting component mixed contact structure, the micro-band plate of RO5880, the micro-band plate of RO4003 and Al-alloy casing; Technique comprises: eutectic weldering, pricker soldering, Reflow Soldering, spun gold wedge bonding, gold ball bonding, Laser Welding, conducting resinl electrical connection, insulating cement are fixed; It is characterized in that: ultra broadband, large instant bandwidth, intermodulation suppresses to be greater than 50dB, and rising and falling in band is less than 3dB.
Point upper and lower two chambeies in described ultra broadband large instant bandwidth down conversion module structure, radio frequency part is positioned at epicoele, and control and power unit are positioned at cavity of resorption; Technique adopts multi-chip high density packaging technique, large-area brazing technology, laser welding techniques, insulator solder technology, gold ball bonding, spun gold pressure welding bonding techniques; Adopt a point chamber technology in circuit structure, improve the isolation between each signal, take into full account Electro Magnetic Compatibility and signal integrity.
The technology of the present invention bright spot is: applicability is strong, ultra broadband (0.8GHz ~ 18GHz), large instant bandwidth (1.2GHz), all working frequency is within 0.8GHz ~ 18GHz, and the frequency conversion channel of instant bandwidth within 1.2GHz all can use this module; Be high band and low-frequency range by frequency partition, make the frequency after a mixing be unlikely to too high, reduce difficulty of processing, develop skill index; Adopt narrow cavity configuration, avoid cavity effect to produce self-excitation; Box body adopts and divides the method in chamber up and down, utilizing insulator to wearing connection, ensure that epicoele air-tightness between two-layer up and down; Employing radio frequency SMP is blind to be joined, and both ensure that air-tightness, and solves again the connectivity problem with Head switches bank of filters, save cable, reduce volume; Adopt equalizing circuit, solve the fluctuating problem in band, and improve the consistency between multichannel.In structure, the dimensional requirement of coupling system makes full use of space, intermediate-frequency filter (LC filter) is placed in cavity of resorption, is interconnected by insulator and epicoele.In technique, adopt many substrates large-area welding technology, demountable airproof encapsulation technology, improve the reliability of module, maintenanceability.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the large instant bandwidth down conversion module of ultra broadband, is characterized in that: on circuit structure, and it comprises low-frequency range double conversion branch road, high band double conversion branch road, single-pole double-throw switch (SPDT) S1, intermediate frequency amplification branch road; Described low-frequency range double conversion branch road and described high band double conversion branch road are symmetrical structure, the equal received RF signal in one end of two double conversion branch roads, the other end of two double conversion branch roads all connects single-pole double-throw switch (SPDT) S1, selects one of them double conversion branch road to be connected to described intermediate frequency amplify branch road by single-pole double-throw switch (SPDT) S1.
2. the large instant bandwidth down conversion module of ultra broadband as claimed in claim 1, is characterized in that: described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1; One end of amplifier A1 is as the input of described radiofrequency signal, and the other end of amplifier A1 connects single-pole double-throw switch (SPDT) S1 via standing wave device N1, frequency converter M1, standing wave device N2, amplifier A2, filter Z1, standing wave device N3, frequency converter M2, standing wave device N4 successively; One end of amplifier A3 is as the input of the local oscillation signal of frequency converter M1, and the other end of amplifier A3 connects frequency converter M1 via standing wave device N5; One end of amplifier A4 is as the input of the local oscillation signal of frequency converter M2, and the other end of amplifier A4 connects frequency converter M2 via standing wave device N6.
3. the large instant bandwidth down conversion module of ultra broadband as claimed in claim 1, is characterized in that: described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; One end of amplifier A5 connects single-pole double-throw switch (SPDT) S1, the other end of amplifier A5 connects one end of filter Z3 successively via filter Z2, amplifier A6, standing wave device N7, amplifier A7, the other end of filter Z3 amplifies the signal output part of branch road as described intermediate frequency.
4. the large instant bandwidth down conversion module of ultra broadband as claimed in claim 1, it is characterized in that: in mechanical structure, the cavity of the large instant bandwidth down conversion module of described ultra broadband adopts the mode in point chamber to be up and down divided into epicoele, cavity of resorption, adopts insulator to wearing connection between epicoele, cavity of resorption.
5. the large instant bandwidth down conversion module of ultra broadband as claimed in claim 4, is characterized in that: described epicoele arranges inner cover plate, outer cover plate from inside to outside, and described outer cover plate sealing adopts Laser seal welding, and uses Al-alloy casing to shield and sealing.
6. the large instant bandwidth down conversion module of ultra broadband as claimed in claim 5, it is characterized in that: described epicoele is provided with power supply, insulator, microwave signal line, control and power interface, connection between described power supply and described insulator uses gold ball bonding to carry out bonding, described microwave signal line adopts spun gold wedge bonding to carry out bonding, and described control and power interface are connected with micro-band plate of described cavity of resorption by J30J.
7. the large instant bandwidth down conversion method of ultra broadband of a ultra broadband as claimed in claim 1 large instant bandwidth down conversion module, it is characterized in that: on circuit, be high band and low-frequency range by the frequency partition of radiofrequency signal, a road intermediate-freuqncy signal is exported by single-pole double-throw switch (SPDT) S1 after double conversion, wherein, low-frequency range double conversion be described radiofrequency signal after the double conversion of low-frequency range double conversion branch road, then amplify the process of branch road by single-pole double-throw switch (SPDT) S1 to intermediate frequency; High band double conversion be described radiofrequency signal after the double conversion of high band double conversion branch road, then amplified the process of branch road to described intermediate frequency by single-pole double-throw switch (SPDT) S1; It is the process of intermediate-freuqncy signal being carried out filter and amplification that described intermediate frequency amplifies branch road; The signal transmission direction that described intermediate frequency amplifies branch road is contrary with the signal transmission direction of two double conversion branch roads.
8. the large instant bandwidth down conversion method of ultra broadband as claimed in claim 7, is characterized in that: described low-frequency range double conversion branch road comprises amplifier A1 ~ A4, standing wave device N1 ~ N6, frequency converter M1 ~ M2, filter Z1, described radiofrequency signal is amplified through amplifier A1, enter standing wave device N1 to deliver to frequency converter M1 carry out frequency conversion through improving stationary wave characteristic, local oscillation signal needed for frequency converter M1 amplifies through amplifier A3, frequency converter M1 is reached after the adjustment of standing wave device N5 standing wave, downconvert to an intermediate frequency, then stationary wave characteristic is adjusted through standing wave device N2, amplify through amplifier A2, again after band pass filter Z1 filtering interfering, stationary wave characteristic is improved through standing wave device N3, enter frequency converter M2 and carry out frequency conversion, the local oscillation signal of frequency converter M2 amplifies through amplifier A4, frequency converter M2 is reached after the adjustment of standing wave device N6 standing wave, after being converted to two intermediate frequencies, improve standing wave through standing wave device N4 and enter single-pole double-throw switch (SPDT) S1, enter described intermediate frequency and amplify branch road.
9. the large instant bandwidth down conversion method of ultra broadband as claimed in claim 7, is characterized in that: described intermediate frequency amplifies branch road and comprises amplifier A5 ~ A7, standing wave device N7, filter Z2 ~ Z3; Two intermediate-freuqncy signals from low-frequency range frequency conversion branch road and high band frequency conversion branch road enter intermediate frequency amplification branch road through single-pole double-throw switch (SPDT) S1, amplify through amplifier A5, again after low pass filter Z2 filtering local oscillator and high frequency intermodulation, enter amplifier A6 to amplify, improve stationary wave characteristic through standing wave device N7 to deliver to amplifier A7 and amplify, export intermediate-freuqncy signal through band pass filter Z3.
10. the large instant bandwidth down conversion method of ultra broadband as claimed in claim 7, it is characterized in that: in structural manufacturing process, adopting the mode in point chamber to be up and down divided into epicoele, cavity of resorption the cavity of large for described ultra broadband instant bandwidth down conversion module, between epicoele, cavity of resorption, adopting insulator to wearing connection; Described epicoele arranges inner cover plate, outer cover plate from inside to outside, and described outer cover plate sealing adopts Laser seal welding, and uses Al-alloy casing to shield and sealing; Described epicoele is provided with power supply, insulator, microwave signal line, control and power interface, connection between described power supply and described insulator uses gold ball bonding to carry out bonding, described microwave signal line adopts spun gold wedge bonding to carry out bonding, and described control and power interface are connected with micro-band plate of described cavity of resorption by J30J.
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