CN104092473A - 3-mm waveband receiver and application thereof - Google Patents
3-mm waveband receiver and application thereof Download PDFInfo
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- CN104092473A CN104092473A CN201410373596.XA CN201410373596A CN104092473A CN 104092473 A CN104092473 A CN 104092473A CN 201410373596 A CN201410373596 A CN 201410373596A CN 104092473 A CN104092473 A CN 104092473A
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Abstract
The invention provides a 3-mm waveband receiver and application thereof. The 3-mm waveband receiver at least comprises a receiving antenna, a low-noise amplifier, a local oscillation signal source, an orthogonal frequency mixer, an orthogonal coupler and an intermediate-frequency amplifier, wherein the receiving antenna is used for receiving radio-frequency signals; the low-noise amplifier is used for amplifying the radio-frequency signals received by the receiving antenna; the local oscillation signal source is used for generating local oscillation signals; the orthogonal frequency mixer is used for mixing the frequency of output signals of the low-noise amplifier and the frequency of the local oscillation signals generated by the local oscillation signal source, and generating and outputting two paths of orthogonal intermediate-frequency signals; the orthogonal coupler is used for performing power synthesis on the two paths of output signals of the orthogonal frequency mixer, and generating and outputting one path of single side band signals; the intermediate-frequency amplifier is used for amplifying the single side band signal outputs by the orthogonal coupler. The 3-mm waveband receiver disclosed by the invention can be used for greatly lowering the cost and the implementation difficulty and also changing the connection sequence of an I/Q output port of the orthogonal frequency mixer and two input ports of the orthogonal coupler so as to realize single side band output and well inhibit mirror image signals.
Description
Technical field
The present invention relates to millimeter-wave technology field, particularly relate to a kind of 3mm wave band receiver and application thereof.
Background technology
Millimeter wave has good atmosphere through characteristic and abundant frequency spectrum resource, in fields such as communication, guidance, radar, clinical medicine, is significant and application prospect.Wherein, 3mm wave band, as atmospheric window, has shorter wavelength and less propagation attenuation, is the focus of millimetre-wave attenuator research.As the important component part of millimeter-wave systems, reception function downconverts to intermediate-freuqncy signal by the millimeter-wave signal of high frequency so that follow-up signal is processed.Therefore, the performance of receiver (as sensitivity, noise factor, image signal suppress ability, dynamic range etc.) is good and bad has a direct impact whole 3mm wave band millimeter wave system.
Existing 3mm wave band receiver reception bandwidth is narrower, and integrated level is low and cost is higher, and beard and hair meets application demand.For example, in direct detection formula method of reseptance, receiver cannot obtain phase information, and to image signal unrestraint, thereby poor-performing; In superheterodyne method, receiver is down-converted to intermediate-freuqncy signal by frequency mixer by high-frequency signal, and it adopts fundamental wave mixing method, needs a local oscillation signal source that directly produces 3mm wave band high-frequency signal, thereby can cause millimeter-wave systems cost to increase.In addition, the structure of existing receiver is not compact, takes up room larger.
Thus, need now a kind of superperformance that has badly, can effectively suppress image signal, and compact conformation, lower-cost 3mm wave band receiver.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of 3mm wave band receiver and application thereof, performance is good, cost is low, be used for solving prior art 3mm wave band receiver performance poor, cannot suppress image signal, structure is not compact, cost is higher, cannot meet the problem of application demand.
For achieving the above object and other relevant objects, the invention provides a kind of 3mm wave band receiver, wherein, described 3mm wave band receiver at least comprises:
Reception antenna, for received RF signal;
Low noise amplifier, is connected in described reception antenna, for the radiofrequency signal that described reception antenna is received, amplifies;
Local oscillation signal source, for generation of local oscillation signal;
Orthogonal mixer, there is two input ports and I/Q output port, one of them input port is connected in described low noise amplifier, another input port is connected in described local oscillation signal source, for the local oscillation signal of the output signal of described low noise amplifier and the generation of described local oscillation signal source is carried out to mixing, produce and export the intermediate-freuqncy signal of two-way quadrature; Wherein, first via intermediate-freuqncy signal is exported by the I output port of described orthogonal mixer, and the second tunnel intermediate-freuqncy signal is exported by the Q output port of described orthogonal mixer;
Orthocoupler, there are two input ports and two output ports, two input ports are connected to the I/Q output port of described orthogonal mixer, one of them output port is also connected in a matched load, synthetic for the two-way output signal of described orthogonal mixer being carried out to power, produce and export a road single sideband singal; Wherein, described single sideband singal is exported by another output port of described orthocoupler, and the sideband of described single sideband singal is suitable for selecting with the order that is connected of the I/Q output port of described orthogonal mixer according to two of described orthocoupler input ports;
Intermediate frequency amplifier, is connected in another output port of described orthocoupler, for the single sideband singal of described orthocoupler output is amplified.
Preferably, described local oscillation signal source at least comprises:
Voltage controlled oscillator, for generation of microwave signal;
Frequency multiplier, is connected in described voltage controlled oscillator, carries out frequency multiplication, to produce local oscillation signal for the microwave signal that described voltage controlled oscillator is produced.
Preferably, described voltage controlled oscillator is low frequency voltage controlled oscillator, and described frequency multiplier is N frequency multiplier, and wherein, N is more than or equal to two natural number.
Preferably, described frequency multiplier is varactor doubler, and the frequency range of the microwave signal that described voltage controlled oscillator produces is 20GHz～27.5GHz.
Preferably, described 3mm wave band receiver also comprises: power module; Described power module at least comprises:
The first direct current source plate, is connected in described voltage controlled oscillator and described frequency multiplier, for to described voltage controlled oscillator and described frequency multiplier input direct-current voltage stabilizing supply power voltage, and to described voltage controlled oscillator input tuning voltage; Wherein, frequency and the power of the microwave signal that described voltage controlled oscillator produces are suitable for changing by changing described tuning voltage, thereby change the output signal in described local oscillation signal source;
The second direct current source plate, is connected in described low noise amplifier, for to described low noise amplifier input direct-current voltage stabilizing supply power voltage;
The 3rd direct current source plate, is connected in described orthogonal mixer, for to described orthogonal mixer input direct-current voltage stabilizing supply power voltage;
The 4th direct current source plate, is connected in described intermediate frequency amplifier, for to described intermediate frequency amplifier input direct-current voltage stabilizing supply power voltage.
Preferably, described power module also comprises:
The first DC power supply terminal, is connected in described the first direct current source plate, for powering to described the first direct current source plate;
The second DC power supply terminal, is connected in described the second direct current source plate, for powering to described the second direct current source plate;
The 3rd DC power supply terminal, is connected in described the 3rd direct current source plate, for powering to described the 3rd direct current source plate;
The 4th DC power supply terminal, is connected in described the 4th direct current source plate, for powering to described the 4th direct current source plate.
Preferably, described the first DC power supply terminal, described the second DC power supply terminal and described the 3rd DC power supply terminal are feedthrough capacitor.
Preferably, described orthogonal mixer is M th harmonic mixer, and wherein, M is more than or equal to two natural number.
Preferably, described orthogonal mixer is second harmonic frequency mixer.
The present invention also provides a kind of application of 3mm wave band receiver as above, and wherein, described 3mm wave band receiver is applied to the frequency expansion test of 3mm wave band millimeter wave signal-to-noise ratio analyzer.
As mentioned above, 3mm wave band receiver of the present invention and application thereof, have following beneficial effect:
The present invention has realized the function of 3mm wave band receiver, makes to carry out broadband high-frequency signals reception at 3mm wave band, convenient, accurate.
3mm wave band receiver of the present invention, employing can reduce the harmonic mixer of the local frequency of required local oscillation signal, 3mm wave band local oscillation signal source without high frequency, can greatly reduce costs and realize difficulty, the connection order that simultaneously changes the I/Q output port of orthogonal mixer and two input ports of orthocoupler can be realized single-side belt output, can suppress well image signal.
3mm wave band receiver of the present invention, each can be formed to device highly compact and be integrated into four interconnective modular constructions, can reduce cost and realize densification integrated, realizing broadband receives, total is independent general, compact conformation, easy to use, met the demand that 3mm wave band densification, broadband receive.
3mm wave band receiver of the present invention, can, by being connected with frequency spectrograph, carry out the receptivity test of 3mm wave band receiver; Can also be applied to the frequency expansion test of 3mm wave band millimeter wave signal-to-noise ratio analyzer, practicality is high.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation block diagram of the 3mm wave band receiver of the embodiment of the present invention.
Fig. 2 is shown as the structural representation block diagram of the 3mm wave band receiver of the embodiment of the present invention.
Fig. 3 is shown as the schematic perspective view of part of module structure of the 3mm wave band receiver of the embodiment of the present invention.
Fig. 4 is shown as the floor map of part of module structure of the 3mm wave band receiver of the embodiment of the present invention.
Element numbers explanation
1 reception antenna
2 low noise amplifiers
3 local oscillation signal sources
31 voltage controlled oscillators
32 frequency multipliers
4 orthogonal mixers
5 orthocouplers
6 matched loads
7 intermediate frequency amplifiers
8 power modules
81 first direct current source plates
82 second direct current source plates
83 the 3rd direct current source plates
84 the 4th direct current source plates
85 first DC power supply terminals
86 second DC power supply terminals
87 the 3rd DC power supply terminals
88 the 4th DC power supply terminals
100 first modular constructions
101 first housings
102 local oscillation signal output ports
103 first retaining thread holes
104 connecting thread holes
105 first earthing rods
300 the 3rd modular constructions
301 the 3rd housings
302 local oscillation signal input ports
303 radio-frequency (RF) signal input end mouths
304 intermediate-freuqncy signal output ports
305 the 3rd retaining thread holes
306 second ring flange interfaces
307 the 3rd earthing rods
Embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be applied by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
Refer to Fig. 1, embodiments of the invention relate to a kind of 3mm wave band receiver.It should be noted that, the diagram providing in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy and only show with assembly relevant in the present invention in graphic but not component count, shape and size drafting while implementing according to reality, during its actual enforcement, kenel, quantity and the ratio of each assembly can be a kind of random change, and its assembly layout kenel also may be more complicated.
The 3mm wave band receiver of the present embodiment at least comprises: reception antenna 1, low noise amplifier 2, orthogonal mixer 4, orthocoupler 5 and intermediate frequency amplifier 7.Wherein:
For reception antenna 1, it is for received RF signal.This radiofrequency signal is the high-frequency signal of 3mm wave band, and it is as the input signal of low noise amplifier 2.
For low noise amplifier 2, it is connected in reception antenna 1, for the radiofrequency signal that reception antenna 1 is received, amplifies.The radiofrequency signal that reception antenna 1 receives enters subsequent device after low noise amplifier 2, the noise factor of total just remains on lower level like this, radiofrequency signal after low noise is amplified can make up the conversion loss of the output signal of follow-up orthogonal mixer 4, makes the gain of the output signal after low noise amplification and mixing remain on acceptable level.In addition, low noise amplifier 2 can be exported the output signal with higher power output, as one of them input signal of orthogonal mixer 4.
For local oscillation signal source 3, it is for generation of local oscillation signal.In the present embodiment, local oscillation signal source 3 at least comprises: voltage controlled oscillator 31 and frequency multiplier 32.Wherein, voltage controlled oscillator 31 is for generation of microwave signal, and frequency multiplier 32 is connected in voltage controlled oscillator 31, carries out frequency multiplication, to produce local oscillation signal for the microwave signal that voltage controlled oscillator 31 is produced.Voltage controlled oscillator 31 is low frequency voltage controlled oscillator 31, and frequency multiplier 32 is N frequency multiplier 32, and wherein, N is more than or equal to two natural number.The output signal of this frequency multiplier 32 is as another input signal of orthogonal mixer 4.
For orthogonal mixer 4, it has two input ports and I/Q output port, one of them input port is connected in low noise amplifier 2, another input port is connected in local oscillation signal source 3, for the local oscillation signal of the output signal of low noise amplifier 2 and 3 generations of local oscillation signal source is carried out to mixing, produce and export the intermediate-freuqncy signal of two-way quadrature; Wherein, first via intermediate-freuqncy signal is exported by the I output port of orthogonal mixer 4, and the second tunnel intermediate-freuqncy signal is exported by the Q output port of orthogonal mixer 4.In the present embodiment, orthogonal mixer 4 has first input end mouth, the second input port, I output port and Q output port, its first input end mouth is connected in low noise amplifier 2, its second input port is connected in the frequency multiplier 32 in local oscillation signal source 3, its I output port output first via intermediate-freuqncy signal, its Q output port is exported the second tunnel intermediate-freuqncy signal, wherein, first via intermediate-freuqncy signal and the second tunnel intermediate-freuqncy signal quadrature, be between them, to there is the phase difference of 90 °, and as the two-way input signal of orthocoupler 5.In the present embodiment, orthogonal mixer 4 is M th harmonic mixer, and wherein, M is more than or equal to two natural number.Because orthogonal mixer 4 can reduce the local frequency of required local oscillation signal, the local frequency of required local oscillation signal is that the 1/M of rf frequency of the radiofrequency signal of amplifying through low noise amplifier 2 low noises is (as 1/2,1/4 etc.), therefore, the tuning range of local oscillation signal is narrower, has simplified the design difficulty in local oscillation signal source 3.
Preferably, orthogonal mixer 4 is second harmonic frequency mixer, and because radiofrequency signal is 3mm wave band high-frequency signal, its frequency range is 80GHz～110GHz, and the local frequency of so required local oscillation signal is 40GHz～55GHz, i.e. U wave band millimeter wave signal; Frequency multiplier 32 is preferably varactor doubler 32, and the frequency expansion of the microwave signal that voltage controlled oscillator 31 can be produced is twice, and therefore, the microwave signal that voltage controlled oscillator 31 produces is only required to be the low frequency microwave signal in 20GHz～27.5GHz frequency range.With respect to needing in prior art, directly produce high-frequency 3mm wave band local oscillation signal, the tuning range of the local oscillation signal of the present embodiment is narrower, is easier to Design and implementation, and cost is lower.In addition, also will consider required intermediate-freuqncy signal, for example, the IF-FRE of required intermediate-freuqncy signal is 1GHz, and the rf frequency of radiofrequency signal is 91GHz, and the local frequency of so required local oscillation signal is (91GHz-1GHz)/2=45GHz.
Certainly, in other embodiment, orthogonal mixer 4 can also be selected other secondary harmonic mixers, same, and frequency multiplier 32 also can be selected other secondary frequency multipliers 32, so the frequency range of the microwave signal of low frequency voltage controlled oscillator 31 generations can be less.
For orthocoupler 5, it has two input ports and two output ports, two input ports are connected to the I/Q output port of orthogonal mixer 4, one of them output port is also connected in a matched load 6, synthetic for the two-way output signal of orthogonal mixer 4 being carried out to power, produce and export a road single sideband singal; Wherein, single sideband singal is exported by another output port of orthocoupler 5, and the sideband of single sideband singal is suitable for selecting with the order that is connected of the I/Q output port of orthogonal mixer 4 according to two of orthocoupler 5 input ports.In the present embodiment, an output port of orthocoupler 5 is isolated port, and it connects a good matched load 6, effectively realizes the isolation to the signal by this port.Another output port of orthocoupler 5 is coupling port, two input ports of orthocoupler 5 have the phase difference of 90 ° in the output of this coupling port, thereby make the intermediate-freuqncy signal of two-way quadrature by the rear output of orthocoupler 5 coupling single sideband singal, as the input signal of intermediate frequency amplifier 7.Between two input ports of orthocoupler 5 and the I output port of orthogonal mixer 4 and Q output port, adopt different connected modes, can realize the inhibition to input signal LSB (lower sideband) or USB (upper sideband), and then effectively suppress image signal, thereby can realize signal, receive more accurately.
For intermediate frequency amplifier 7, it is connected in another output port of orthocoupler 5, for the single sideband singal of orthocoupler 5 outputs is amplified.In the present embodiment, intermediate frequency amplifier 7 is connected in the coupling port of orthocoupler 5, after the output signal of the coupling port of 7 pairs of orthocouplers 5 of intermediate frequency amplifier is carried out power amplification, can be connected by coaxial fitting the receptivity of carrying out 3mm wave band receiver with connecting line with frequency spectrograph and test, the high-frequency signal of having realized in broadband range receives.
The present embodiment has been realized the function of 3mm wave band receiver, makes to carry out broadband high-frequency signals reception at 3mm wave band, convenient, accurate.
In other embodiment, between orthogonal mixer 4 and orthocoupler 5, can also, by connecting filter, by unwanted signal filtering in the output signal of orthogonal mixer 4, and select required signal.
It is pointed out that as shown in Figure 2, except above-mentioned basic device, the 3mm wave band receiver of the present embodiment also comprises: power module 8; Power module 8 at least comprises: the first direct current source plate 81, the second direct current source plate 82, the 3rd direct current source plate 83 and the 4th direct current source plate 84.Wherein:
For the first direct current source plate 81, it is connected in voltage controlled oscillator 31 and frequency multiplier 32, for to voltage controlled oscillator 31 and frequency multiplier 32 input direct-current voltage stabilizing supply power voltages, and to voltage controlled oscillator 31 input tuning voltage.Wherein, DC voltage-stabilizing supply power voltage can guarantee the normal steady operation of low noise amplifier 2, voltage controlled oscillator 31 and frequency multiplier 32.And the frequency of the microwave signal that voltage controlled oscillator 31 produces and power are suitable for changing by changing tuning voltage, after frequency multiplier 32, can change the output signal in local oscillation signal source 3.
For the second direct current source plate 82, it is connected in low noise amplifier 2, for to low noise amplifier 2 input direct-current voltage stabilizing supply power voltages.Wherein, DC voltage-stabilizing supply power voltage can guarantee the normal steady operation of low noise amplifier 2.
For the 3rd direct current source plate 83, it is connected in orthogonal mixer 4, for to orthogonal mixer 4 input direct-current voltage stabilizing supply power voltages.Wherein, DC voltage-stabilizing supply power voltage can guarantee the normal steady operation of orthogonal mixer 4.
For the 4th direct current source plate 84, it is connected in intermediate frequency amplifier 7, for to intermediate frequency amplifier 7 input direct-current voltage stabilizing supply power voltages.Wherein, DC voltage-stabilizing supply power voltage can guarantee the normal steady operation of intermediate frequency amplifier 7.
In addition, power module 8 also comprises: the first DC power supply terminal 85, the second DC power supply terminal 86, the 3rd DC power supply terminal 87 and the 4th DC power supply terminal 88.Wherein:
For the first DC power supply terminal 85, it is connected in the first direct current source plate 81, for powering to the first direct current source plate 81.
For the second DC power supply terminal 86, it is connected in the second direct current source plate 82, for powering to the second direct current source plate 82.
For the 3rd DC power supply terminal 87, it is connected in the 3rd direct current source plate 83, for powering to the 3rd direct current source plate 83.
For the 4th DC power supply terminal 88, it is connected in the 4th direct current source plate 84, for powering to the 4th direct current source plate 84.
Preferably, the first DC power supply terminal 85, the second DC power supply terminal 86 and the 3rd DC power supply terminal 87 are feedthrough capacitor.Feedthrough capacitor can directly be connected on the metal covering of direct current source plate, so its grounded inductor is less, almost there is no the impact of lead-in inductance; In addition, its input/output terminal is isolated by metal covering, has eliminated high-frequency coupling, has the filter effect that approaches ideal capacitance.
It is worth mentioning that, in the present embodiment, each can be formed to device highly compact and be integrated into four interconnective modular constructions, thereby make total independent general, compact conformation, easy to use, met the demand that 3mm wave band densification, broadband receive.
Be respectively as shown in Figure 3 and Figure 4 schematic perspective view and the floor map of part of module structure in the 3mm band signal source of the present embodiment.Wherein, by voltage controlled oscillator 31, frequency multiplier 32, the first direct current source plate 81 and the first DC power supply terminal 85 are integrated in the first modular construction 100, by reception antenna 1, low noise amplifier 2, the second direct current source plate 82 and the second DC power supply terminal 86 are integrated in the second modular construction (all not shown in Fig. 3 and Fig. 4), by orthogonal mixer 4, the 3rd direct current source plate 83 and the 3rd DC power supply terminal 87 are integrated in the 3rd modular construction 300, by orthocoupler 5, intermediate frequency amplifier 7, the 4th direct current source plate 84 and the 4th DC power supply terminal 88 are integrated in four module structure (all not shown in Fig. 3 and Fig. 4).
For the first modular construction 100, it comprises: the first housing 101, be arranged on the local oscillation signal output port 102 of the first housing 101 1 sides, be arranged on the first DC power supply terminal 85 outside the first housing 101, and be arranged on local oscillator Waveguide-microbelt transition structure, voltage controlled oscillator 31, frequency multiplier 32 and the first direct current source plate 81 in the first housing 101.
Wherein, because voltage controlled oscillator 31, frequency multiplier 32 are all planar circuits, local oscillator Waveguide-microbelt transition structure can be converted into planar circuit by microwave signal Waveguide interface, has realized the transition of microwave signal from waveguide to micro-band.Local oscillation signal output port 102, for exporting local oscillation signal, as one of them input signal of orthogonal mixer 4.
In addition, the first modular construction 100 also comprises the first retaining thread hole 103, connecting thread hole and the ring flange interface being arranged on the first housing 101, and wherein, ring flange interface and local oscillation signal output port 102 are positioned at the same side of the first housing 101.In the present embodiment, can adopt the bolt suitable with the first retaining thread hole 103 by the fixing assembling of the first housing 101; The input/output end port of each modular construction all carries out flange connection by ring flange interface.In other embodiment, connecting thread hole is used for connecting other devices, for the first modular construction is carried out to Function Extension.
For the second modular construction, it comprises: the second housing, be arranged on the radiofrequency signal output port of the second housing one side, be arranged on the second DC power supply terminal 86 outside the second housing, and be arranged on radio-frequency plumbing microstrip transition structure, reception antenna 1, low noise amplifier 2 and the second direct current source plate 82 in the second housing.
Wherein, because low noise amplifier 2 is planar circuits, radio-frequency plumbing microstrip transition structure can be converted into planar circuit by radiofrequency signal Waveguide interface, has realized the transition of radiofrequency signal from waveguide to micro-band.Radiofrequency signal output port, for exporting the radiofrequency signal of amplifying through low noise amplifier 2 low noises, as another input signal of orthogonal mixer 4.
In addition, the second modular construction has the structure similar to the first modular construction 100, and therefore not to repeat here.
For the 3rd modular construction 300, it comprises: the 3rd housing 301, be arranged on the local oscillation signal input port 302 of the 3rd housing 301 1 sides, be arranged on the radio-frequency (RF) signal input end mouth 303 relative with local oscillation signal input port 302 of the 3rd housing 301 opposite sides, be arranged on two intermediate-freuqncy signal output ports 304 of the 3rd housing 302 bottoms, be arranged on the 3rd DC power supply terminal 87 outside the 3rd housing 301, be arranged on 3mm wave band Waveguide-microbelt transition structure, orthogonal mixer 4 and the 3rd direct current source plate 83 in the 3rd housing 301.
Wherein, because orthogonal mixer 4 is planar circuits, 3mm wave band Waveguide-microbelt transition structure can be converted into planar circuit by 3mm band signal Waveguide interface, has realized the transition of 3mm band signal from waveguide to micro-band.Local oscillation signal input port 302, for receiving from the signal of local oscillation signal output port 102 outputs.Radio-frequency (RF) signal input end mouth 303, for receiving from the signal of radiofrequency signal output port output.304, one of two intermediate-freuqncy signal output ports are for exporting from the first via intermediate-freuqncy signal of the I output port output of orthogonal mixer 4, and another is for exporting from the second tunnel intermediate-freuqncy signal of the Q output port output of orthogonal mixer 4.
In addition, the 3rd modular construction 300 also comprises the 3rd retaining thread hole 305 being arranged on the 3rd housing 301, two ring flange interfaces and SMA coaxial cable interfaces.One of them ring flange interface and local oscillation signal input port 302 are positioned at the same side of the 3rd housing 301, and the first modular construction 100 and the 3rd modular construction 300 are carried out flange connection by this ring flange interface.Second ring flange interface 306 and radiofrequency signal are defeated is positioned at the same side of the 3rd housing 301 as port 303, and the second modular construction and the 3rd modular construction 300 are carried out flange connection by second ring flange interface 306.Between the 3rd modular construction 300 and four module structure, by SMA coaxial cable interface, be connected with SMA coaxial cable.In addition, can adopt the bolt suitable with the 3rd retaining thread hole 305 by the fixing assembling of the 3rd housing 301.
For four module structure, it comprises: the 4th housing, be arranged on two signal input end of intermediate frequency mouths of the 4th housing one side, be arranged on intermediate frequency amplifying signal output port and the matched load 6 of the 4th housing opposite side, be arranged on the 4th DC power supply terminal 88 outside the 4th housing, and be arranged on orthocoupler 5, intermediate frequency amplifier 7 and the 4th direct current source plate 84 in the 4th housing.
Wherein, intermediate frequency amplifying signal output port, for exporting the intermediate frequency amplifying signal amplifying through intermediate frequency amplifier 7.According to different needs, can process accordingly the signal of intermediate frequency amplifying signal output port output.
In addition, four module structure has the structure similar to the first modular construction 100, and therefore not to repeat here.
In addition, in each modular construction, be equipped with the earthing rod for ground connection, as shown in Figure 3 and Figure 4, the 3rd housing 301 that the first housing 101 of the first modular construction 100 is provided with for the first earthing rod 105, the three modular constructions 300 of ground connection is provided with the 3rd earthing rod 307 for ground connection.
Another embodiment of the present invention relates to the application of the 3mm wave band receiver of an embodiment, and 3mm band signal source can be connected with frequency spectrograph with connecting line by coaxial fitting, carries out the receptivity test of 3mm wave band receiver; Can also be applied to the frequency expansion test of 3mm wave band millimeter wave signal-to-noise ratio analyzer.
To sum up, 3mm wave band receiver of the present invention, employing can reduce the harmonic mixer of the local frequency of required local oscillation signal, 3mm wave band local oscillation signal source without high frequency, can greatly reduce costs and realize difficulty, the connection order that simultaneously changes the I/Q output port of orthogonal mixer and two input ports of orthocoupler can be realized single-side belt output, can suppress well image signal.
3mm wave band receiver of the present invention, each can be formed to device highly compact and be integrated into four interconnective modular constructions, can reduce cost and realize densification integrated, realizing broadband receives, total is independent general, compact conformation, easy to use, met the demand that 3mm wave band densification, broadband receive.
3mm wave band receiver of the present invention, can, by being connected with frequency spectrograph, carry out the receptivity test of 3mm wave band receiver; Can also be applied to the frequency expansion test of 3mm wave band millimeter wave signal-to-noise ratio analyzer, practicality is high.
So the present invention has effectively overcome various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (10)
1. a 3mm wave band receiver, is characterized in that, described 3mm wave band receiver at least comprises:
Reception antenna, for received RF signal;
Low noise amplifier, is connected in described reception antenna, for the radiofrequency signal that described reception antenna is received, amplifies;
Local oscillation signal source, for generation of local oscillation signal;
Orthogonal mixer, there is two input ports and I/Q output port, one of them input port is connected in described low noise amplifier, another input port is connected in described local oscillation signal source, for the local oscillation signal of the output signal of described low noise amplifier and the generation of described local oscillation signal source is carried out to mixing, produce and export the intermediate-freuqncy signal of two-way quadrature; Wherein, first via intermediate-freuqncy signal is exported by the I output port of described orthogonal mixer, and the second tunnel intermediate-freuqncy signal is exported by the Q output port of described orthogonal mixer;
Orthocoupler, there are two input ports and two output ports, two input ports are connected to the I/Q output port of described orthogonal mixer, one of them output port is also connected in a matched load, synthetic for the two-way output signal of described orthogonal mixer being carried out to power, produce and export a road single sideband singal; Wherein, described single sideband singal is exported by another output port of described orthocoupler, and the sideband of described single sideband singal is suitable for selecting with the order that is connected of the I/Q output port of described orthogonal mixer according to two of described orthocoupler input ports;
Intermediate frequency amplifier, is connected in another output port of described orthocoupler, for the single sideband singal of described orthocoupler output is amplified.
2. 3mm wave band receiver according to claim 1, is characterized in that, described local oscillation signal source at least comprises:
Voltage controlled oscillator, for generation of microwave signal;
Frequency multiplier, is connected in described voltage controlled oscillator, carries out frequency multiplication, to produce local oscillation signal for the microwave signal that described voltage controlled oscillator is produced.
3. 3mm wave band receiver according to claim 2, is characterized in that, described voltage controlled oscillator is low frequency voltage controlled oscillator, and described frequency multiplier is N frequency multiplier, and wherein, N is more than or equal to two natural number.
4. 3mm wave band receiver according to claim 3, is characterized in that, described frequency multiplier is varactor doubler, and the frequency range of the microwave signal that described voltage controlled oscillator produces is 20GHz～27.5GHz.
5. 3mm wave band receiver according to claim 2, is characterized in that, described 3mm wave band receiver also comprises: power module; Described power module at least comprises:
The first direct current source plate, is connected in described voltage controlled oscillator and described frequency multiplier, for to described voltage controlled oscillator and described frequency multiplier input direct-current voltage stabilizing supply power voltage, and to described voltage controlled oscillator input tuning voltage; Wherein, frequency and the power of the microwave signal that described voltage controlled oscillator produces are suitable for changing by changing described tuning voltage, thereby change the output signal in described local oscillation signal source;
The second direct current source plate, is connected in described low noise amplifier, for to described low noise amplifier input direct-current voltage stabilizing supply power voltage;
The 3rd direct current source plate, is connected in described orthogonal mixer, for to described orthogonal mixer input direct-current voltage stabilizing supply power voltage;
The 4th direct current source plate, is connected in described intermediate frequency amplifier, for to described intermediate frequency amplifier input direct-current voltage stabilizing supply power voltage.
6. 3mm wave band receiver according to claim 5, is characterized in that, described power module also comprises:
The first DC power supply terminal, is connected in described the first direct current source plate, for powering to described the first direct current source plate;
The second DC power supply terminal, is connected in described the second direct current source plate, for powering to described the second direct current source plate;
The 3rd DC power supply terminal, is connected in described the 3rd direct current source plate, for powering to described the 3rd direct current source plate;
The 4th DC power supply terminal, is connected in described the 4th direct current source plate, for powering to described the 4th direct current source plate.
7. 3mm wave band receiver according to claim 6, is characterized in that, described the first DC power supply terminal, described the second DC power supply terminal and described the 3rd DC power supply terminal are feedthrough capacitor.
8. 3mm wave band receiver according to claim 1, is characterized in that, described orthogonal mixer is M th harmonic mixer, and wherein, M is more than or equal to two natural number.
9. 3mm wave band receiver according to claim 8, is characterized in that, described orthogonal mixer is second harmonic frequency mixer.
10. an application for the 3mm wave band receiver as described in claim 1-9 any one, is characterized in that, described 3mm wave band receiver is applied to the frequency expansion test of 3mm wave band millimeter wave signal-to-noise ratio analyzer.
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| CN104833955A (en) * | 2015-03-09 | 2015-08-12 | 中国科学院上海微系统与信息技术研究所 | 3mm-waveband small detector front-end |
| CN109274386A (en) * | 2018-11-22 | 2019-01-25 | 安徽芯核防务装备技术股份有限公司 | A kind of millimeter wave receiver |
| CN111342855A (en) * | 2020-03-19 | 2020-06-26 | 复旦大学 | Low-power-consumption receiver for remote backscattering communication system |
| WO2022111308A1 (en) * | 2020-11-24 | 2022-06-02 | 华为技术有限公司 | Frequency-division multiplexing unit, apparatus and method |
| CN115037251A (en) * | 2022-08-11 | 2022-09-09 | 壹新信通科技(成都)有限公司 | Two-way output terahertz frequency doubler, communication transmitting terminal and system |
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| CN103209147A (en) * | 2013-03-25 | 2013-07-17 | 电子科技大学 | Multi-band millimeter wave receiver and multi-band millimeter wave receiving method |
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| US20050117664A1 (en) * | 2003-10-31 | 2005-06-02 | Sharp Kabushiki Kaisha | Frequency conversion circuit, radio frequency wave receiver, and radio frequency transceiver |
| CN102255626A (en) * | 2011-06-30 | 2011-11-23 | 清华大学 | Pi-network-based millimeter wave frequency band receiver with electrostatic discharge protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104833955A (en) * | 2015-03-09 | 2015-08-12 | 中国科学院上海微系统与信息技术研究所 | 3mm-waveband small detector front-end |
| CN109274386A (en) * | 2018-11-22 | 2019-01-25 | 安徽芯核防务装备技术股份有限公司 | A kind of millimeter wave receiver |
| CN111342855A (en) * | 2020-03-19 | 2020-06-26 | 复旦大学 | Low-power-consumption receiver for remote backscattering communication system |
| WO2022111308A1 (en) * | 2020-11-24 | 2022-06-02 | 华为技术有限公司 | Frequency-division multiplexing unit, apparatus and method |
| CN115037251A (en) * | 2022-08-11 | 2022-09-09 | 壹新信通科技(成都)有限公司 | Two-way output terahertz frequency doubler, communication transmitting terminal and system |
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Application publication date: 20141008 |