CN210075167U

CN210075167U - Microwave circuit

Info

Publication number: CN210075167U
Application number: CN201920482858.4U
Authority: CN
Inventors: 朱自谦
Original assignee: Wuxi Sien Electronic Technology Co Ltd
Current assignee: Wuxi Sien Electronic Technology Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-02-14
Anticipated expiration: 2029-04-11

Abstract

The utility model discloses a microwave circuit, including at least a set of frequency conversion passageway, each group the frequency conversion passageway includes: the initial module is used for receiving the signal source and outputting an initial signal; the shunt module receives the initial signal and divides the initial signal into at least two shunt signals; the frequency mixing module comprises at least two frequency mixing sub-modules, wherein each frequency mixing sub-module receives one shunt signal and one local oscillator signal and outputs a frequency mixing sub-signal after the shunt signal and the local oscillator signal are mixed; the frequencies of the local oscillator signals received by all the frequency mixing sub-modules are different, so that the frequencies of the frequency mixing sub-signals output by all the frequency mixing sub-modules are different; and the first-stage combining module is used for combining all the frequency mixing sub-signals to obtain a first-stage frequency mixing signal with the bandwidth larger than that of the initial signal. Because the first-stage mixing signal is divided and then mixed and then combined, the resolution ratio of the first-stage mixing signal is the same as that of the signal source, and the problem of amplitude-phase distortion is avoided.

Description

Microwave circuit

Technical Field

The utility model relates to a microwave generates the field, especially relates to a microwave circuit.

Background

With the development of frequency synthesis technology, Digital Direct frequency synthesis (DDS) becomes one of the key generation technologies for large instantaneous bandwidth signals, but the full Digital DDS structure has the defects of high spurious, high harmonic, and low upper frequency limit, and cannot meet the actual requirements for large instantaneous bandwidth signal generation.

To this end, the technician multiplies the DDS-based large instantaneous bandwidth signal to expand the signal bandwidth and increase the center frequency of the signal. However, multiple frequency doubling results in amplitude-phase distortion of the generated signal and a reduction in frequency resolution.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a microwave circuit.

The utility model discloses a microwave circuit, include at least a set of frequency conversion passageway, each group the frequency conversion passageway includes:

the initial module is used for receiving the signal source and outputting an initial signal;

the shunt module receives the initial signal and divides the initial signal into at least two shunt signals;

the frequency mixing module comprises at least two frequency mixing sub-modules, wherein each frequency mixing sub-module receives one shunt signal and one local oscillator signal and outputs a frequency mixing sub-signal after the shunt signal and the local oscillator signal are mixed; the frequencies of the local oscillator signals received by all the frequency mixing sub-modules are different, so that the frequencies of the frequency mixing sub-signals output by all the frequency mixing sub-modules are different;

and the first-stage combining module is used for combining all the frequency mixing sub-signals to obtain a first-stage frequency mixing signal with the bandwidth larger than that of the initial signal.

In the microwave circuit, the initialization module includes a signal source port, an initial local oscillator signal port and an initial mixer, the signal source port is used for receiving a signal source, the initial local oscillator signal port is used for receiving an initial local oscillator signal, and the initial mixer is used for mixing the signal source and the initial local oscillator signal and outputting the initial signal.

In the microwave circuit, in the initial module, the number of the initial mixers is at least two and the initial mixers are sequentially arranged in series, each of the initial mixers outputs an initial sub-signal, and the number of the initial local oscillator signal ports is at least two and the initial local oscillator signal ports are respectively connected to at least two of the initial mixers; the frequency of the signal source, the at least two initial sub-signals and the initial signal increases from the signal source to the splitting module.

In the microwave circuit, the output end of each initial mixer is connected with a filter; and/or the initial mixer is a subtractive mixer; and/or the initial local oscillator signal port is a radio frequency connector.

In the above microwave circuit, the number of the frequency conversion channels is at least two, and the microwave circuit further includes:

and the second-stage combining module is connected with the at least two first-stage combining modules so as to receive the at least two first-stage mixing signals and combine the first-stage mixing signals to output second-stage mixing signals.

In the microwave circuit, the frequencies of the local oscillator signals received by all the frequency mixing submodules in each frequency conversion channel form an arithmetic progression, the frequencies of the local oscillator signals received by all the frequency mixing submodules in all the frequency conversion channels form the arithmetic progression, and the arithmetic progression is equal to the bandwidth of the signal source or the initial signal.

In the microwave circuit, the bandwidth of the signal source or the initial signal is 0.5 to 2 GHz.

In the microwave circuit, the bandwidth of the signal source or the initial signal is 1 GHz; the number of the frequency mixing sub-modules in each frequency mixing module is 3, and the bandwidth of the first-stage frequency mixing signal is 3 GHz; the number of the frequency conversion channels is 2, and the bandwidth of the second mixing signal is 6 GHz.

In the microwave circuit, each of the frequency mixing sub-modules includes a first input terminal, a second input terminal, an output terminal, and a sub-mixer, the first input terminal is connected to one output terminal of the branch module, the second input terminal is configured to receive a local oscillation signal, and the sub-mixer mixes the branch signal with the local oscillation signal and outputs a mixing sub-signal.

In the microwave circuit, the output end of each sub-mixer is connected with a filter; the sub-mixer is a subtraction mixer; the second input end is a radio frequency connector.

The utility model discloses a microwave circuit carries out the mixing after shunting received initial signal, obtains the different mixing sub-signal of frequency after, closes two at least mixing sub-signals, obtains the first order mixing signal that the bandwidth is greater than initial signal. Because the first-stage mixing signal is divided and then mixed and then combined, the resolution ratio of the first-stage mixing signal is the same as that of the signal source, and the problem of amplitude-phase distortion is avoided.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a block diagram of a microwave circuit according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a microwave circuit according to an embodiment of the present invention;

FIG. 3 is a schematic circuit diagram of an initial block of the multiple frequency conversion channels of FIG. 1 sharing a signal source port;

fig. 4 is a schematic circuit diagram of the branching module, the mixing module and the first-stage combining module in the frequency conversion channel (1) in fig. 1;

fig. 5 is a schematic circuit diagram of the branching module, the mixing module and the first-stage combining module in the frequency conversion channel (2) in fig. 1;

fig. 6 is a schematic circuit diagram of the second-stage combining module in fig. 1.

Reference numerals:

100-a microwave circuit; 10-frequency conversion channel; 11-an initial module; 12-a splitting module; 13-a frequency mixing module; 14-a first-stage combining module; 20-a second stage combining module.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a microwave circuit 100, including at least a set of frequency conversion passageway 10. Each set of frequency conversion channels 10 may comprise: the device comprises an initial module 11, a splitting module 12, a mixing module 13 and a first-stage combining module 14.

The initial module 11 is used for receiving a signal source and outputting an initial signal. The splitting module 12 receives the initial signal and splits the initial signal into at least two split signals. The splitter module 12 may be a splitter. The frequency mixing module 13 includes at least two frequency mixing sub-modules, and each frequency mixing module 13 receives the branch signal and the local oscillator signal, mixes the two signals, and outputs a frequency mixing sub-signal. In the same group of frequency conversion channels 10, the frequencies of the local oscillator signals received by all the frequency mixing sub-modules are different, so that the frequencies of the frequency mixing sub-signals output by all the frequency mixing sub-modules are different. The first-stage combining module 14 combines all the mixing sub-signals to obtain a first-stage mixing signal with a bandwidth greater than that of the initial signal.

Therefore, the microwave circuit 100 of the embodiment of the present invention obtains the first-stage mixing signal with a larger bandwidth from the signal source with a small bandwidth. In addition, the microwave circuit 100 is first branched, then mixed and then combined, so that the resolution of the first-stage mixed signal is the same as that of the signal source, and the problems of amplitude-phase distortion and resolution reduction are avoided.

The initialization block 11 may include a signal source port, an initial local oscillator signal port, and an initial mixer. The signal source port is used for receiving a signal source, the initial local oscillator signal port is used for receiving an initial local oscillator signal, and the initial mixer mixes the signal element and the initial local oscillator signal and outputs the initial signal.

The initial block 11 may comprise only one initial local oscillator signal port and one initial mixer. However, in order to avoid aliasing distortion of the initial signal output from the signal source after passing through the initial module 11 as much as possible, the initial module 11 may include at least two initial mixers and at least two initial local oscillator signal ports. At least two initial mixers are connected in series in sequence, and each initial mixer is connected with an initial local oscillator signal port and outputs an initial sub-signal. The frequency of the signal source, the at least two initial sub-signals and the initial signal increases from the signal source to the splitting module 12.

The frequency of the first stage mixed signal is related to the frequency of the signal source, the initial local oscillator signal, the combined type of the local oscillator signal and the mixer. The frequency of the second stage mixing signal is related to the frequency of all of the first stage mixing signals. The signal source may be a baseband signal produced by the DDS, and the frequency of the signal source may be 0.1 to 1.1GHz, but may also be other frequency intervals.

The initial module 11 may further include an amplifier disposed between the signal source port and the initial mixer to amplify the signal source. In particular, the amplifier may be a radio frequency amplifier or other type of amplifier. As a variation, the signal source ports of the multiple groups of frequency conversion channels 10 may be shared, the multiple groups of frequency conversion channels 10 have one signal source port, and the amplifier may be a splitting amplifier to split the amplified signal into at least two initial mixers.

In the initialization module 11, the initialization sub-signal output by the initialization mixer closest to the branch module 12 is the initialization signal output by the initialization module 11.

In order to reduce the amplitude-phase distortion of the mixed initial signals, a filter is connected to the output end of each initial mixer. So that the initial sub-signal is filtered and then enters the next initial mixer for mixing or enters the splitting module 12 for splitting.

Of course, the number of initial mixers in the initial block 11 may also be 3, 4, etc.

The initial mixer is a subtractive mixer. Of course, as a modification, an addition mixer or a mixer of another combination system may be used. The initial local oscillator signal port may be a radio frequency connector, and of course, may also be other connectors capable of receiving the local oscillator signal, which is not described in detail. Correspondingly, the mixed sub-signal, the first-stage mixed signal and the second-stage mixed signal are output as radio-frequency signals.

The embodiment of the present invention provides a microwave circuit 100, and the number of the frequency conversion channels 10 is at least two sets. The microwave circuit 100 further includes a second-stage combining module 20, which is connected to the output ends of the at least two first-stage combining modules 14 to receive the at least two first-stage mixing signals and combine them to output a second-stage mixing signal.

Of course, the number of the frequency conversion channels 10 of the microwave circuit 100 may be two, three, etc. The second combining module 20 combines all the first-stage mixing signals and outputs the combined first-stage mixing signals to the second-stage mixing module 13.

The frequencies of the local oscillator signals received by all the frequency mixing submodules in each frequency conversion channel 10 form an arithmetic progression, the frequencies of the local oscillator signals received by all the frequency mixing submodules in all the frequency conversion channels 10 form the same arithmetic progression, and the arithmetic progression is equal to the bandwidth of the signal source or the initial signal.

The bandwidth of the signal source or initial signal may be 0.5 to 2GHz, for example 1 GHz. When the number of the mixing submodules in each mixing module 13 is 3, the bandwidth of the first-stage mixing signal is 3 GHz; when the number of frequency conversion channels 10 is 2, the bandwidth of the second, i.e. mixing, signal is 6 GHz.

In an embodiment of the present invention, each mixing submodule includes a first input terminal, a second input terminal, an output terminal, and a sub-mixer. The first input end is connected to an output end of the branch module 12, the second input end is used for receiving the local oscillator signal, and the sub-mixer outputs the mixed sub-signal from the output end after mixing the branch signal and the local oscillator signal.

The output end of each sub-mixer is connected with a filter. The sub-mixer may be a subtraction mixer, but may be an addition mixer or a mixer of another combination system as a modification. The second input terminal may be a radio frequency connector, and of course, may also be other connectors capable of receiving the local oscillator signal, which is not described in detail.

The embodiment of the utility model provides an in, still be provided with the wave filter between first order combination module 14 and second level combination module 20. Compare and filter together after combining six mixing sub-signals on two passageways, the embodiment of the utility model provides a first order mixing signal that will obtain respectively on two passageways carries out the filtering respectively, is about to three mixing sub-signal and combines the post-filter on the first passageway, and three mixing sub-signal on the second passageway combines the post-filter, can get rid of mixed frequency on every passageway more effectively.

In the same way, in initial module 11, compare and directly adopt an initial mixer and a wave filter, the embodiment of the utility model provides a set up a plurality of initial mixers and a plurality of wave filters that correspond, can get rid of the miscellaneous frequency of skew frequency center more effectively.

The following specifically describes an embodiment of a microwave generating circuit for splitting an initial signal into three split signals by using two sets of frequency conversion channels in a microwave circuit, and splitting modules in each set of frequency conversion channels, and generating a 6GHz instantaneous bandwidth signal crossing a Ku band.

Fig. 2 is a schematic block diagram of a microwave circuit in this embodiment, which includes a frequency conversion channel (1) and a frequency conversion channel (2). The frequency conversion channel (1) comprises a radio frequency amplifier (3), a mixer (4), a filter (5), a mixer (6), a filter (7), a splitter (8), a mixer (9), a mixer (10), a mixer (11), a filter (12), a filter (13), a filter (14), a combiner (15), a filter (16), a combiner (17) and a radio frequency amplifier (18). The frequency conversion channel (2) comprises a radio frequency amplifier (19), a mixer (20), a filter (21), a mixer (22), a filter (23), a splitter (24), a mixer (25), a mixer (26), a mixer (27), a filter (28), a filter (29), a filter (30), a combiner (31) and a filter (32).

In a frequency conversion channel (1), a baseband signal 0.1-1.1GHz generated by a DDS is amplified by a radio frequency amplifier (3), then is subjected to frequency mixing with a 3.6GHz local oscillation signal by a frequency mixer (4), then is subjected to frequency mixing by a filter (5) to obtain a 2.5-3.5 GHz radio frequency signal, then is subjected to frequency mixing by the frequency mixer (6) and a 21GHz local oscillation signal, and then is subjected to filter (7) to obtain a 23.5-24.5 GHz radio frequency signal. The 23.5-24.5 GHz radio frequency signal is divided into three paths by a splitter (8): one path of the radio frequency signal is subjected to frequency mixing with a 37.5GHz local oscillator signal through a frequency mixer (10) and then is subjected to filter (13) to obtain a 13-14 GHz radio frequency signal, the other path of the radio frequency signal is subjected to frequency mixing with a 38.5GHz local oscillator signal through a frequency mixer (9) and then is subjected to filter (12) to obtain a 14-15 GHz radio frequency signal, and the other path of the radio frequency signal is subjected to frequency mixing with a 36.5GHz local oscillator signal through a frequency mixer (11) and then is subjected to filter (14) to obtain a 12-. The 13-14 GHz radio frequency signals output by the filter (13), the 14-15 GHz radio frequency signals output by the filter (12) and the 12-13 GHz radio frequency signals output by the filter (14) are filtered by the combiner (15) and the filter (16) to generate 12-15 GHz radio frequency signals.

In a frequency conversion channel (2), a baseband signal 0.1-1.1GHz generated by a DDS is amplified by a radio frequency amplifier (19), then is subjected to frequency mixing by a frequency mixer (20) and a 3.6GHz local oscillation signal, then is subjected to frequency mixing by a filter (21) to obtain a 2.5-3.5 GHz radio frequency signal, then is subjected to frequency mixing by a frequency mixer (22) and a 21GHz local oscillation signal, and then is subjected to filter (23) to obtain a 23.5-24.5 GHz radio frequency signal. The 23.5-24.5 GHz radio frequency signal is divided into three paths by a splitter (24): one path of the radio frequency signal is subjected to frequency mixing with a 40.5GHz local oscillator signal through a frequency mixer (26) and then is subjected to filter (29) to obtain a 16-17 GHz radio frequency signal, the other path of the radio frequency signal is subjected to frequency mixing with a 39.5GHz local oscillator signal through a frequency mixer (25) and then is subjected to filter (28) to obtain a 15-16 GHz radio frequency signal, and the other path of the radio frequency signal is subjected to frequency mixing with a 41.5GHz local oscillator signal and then is subjected to filter (30) to obtain a 17-18 GHz radio frequency signal. 16-17 GHz radio frequency signals output by the filter (29), 15-16 GHz radio frequency signals output by the filter (28) and 17-18 GHz radio frequency signals output by the filter (30) pass through a combiner (31) and are filtered by a filter (32) to obtain 15-18 GHz radio frequency signals.

The 12-15 GHz radio frequency signals and the 15-18 GHz radio frequency signals are synthesized through a combiner (17) and amplified through a radio frequency amplifier (18) to obtain 12-18 GHz radio frequency signals with the instantaneous bandwidth of 6 GHz.

Fig. 3 is a schematic circuit diagram of a 6GHz instantaneous bandwidth signal microwave generating circuit spanning a Ku band, that is, a schematic circuit diagram of an initial module in which multiple groups of frequency conversion channels share a signal source port, including radio frequency connectors P1, P2, P3, dc blocking capacitors C1, C5, C6, C7, C8, C9, decoupling capacitors C2, C3, C4, C10, C11, C12, choke inductors L1, L2, filters U2, U3, U5, U9, U10, balun U4 of models TRS2-252+, balun U7 of models TC1.33-282+, a two-way radio frequency amplifier U6 of models PHA-22+, and mixers U1, U8 of model HMC213BMS 8E. Wherein C2, C3, C4, C10, C11, C12, L1 and L2 are the decoupling capacitance of the +5V power supply of the dual-channel rf amplifier U6 and the choke inductance of the rf signal, respectively, and C5, C6, C7 and C9 are the stage blocking capacitance of the dual-channel rf amplifier U6. A baseband signal 0.1-1.1GHz generated by a DDS with a power level of 0dBm is filtered by a radio frequency connector P3 and a low-pass filter U5 to remove higher harmonics, and then enters a double-path radio frequency amplifier U6 through a 50-ohm to 100-ohm matching circuit formed by a balun U4 and a U7 to carry out power amplification and two-path output: one path of output baseband signals enter a frequency mixer U1 through a filter U2 and are mixed with a 3.6GHz local oscillation signal with the power level of 13dBm entering the frequency mixer U1 through a radio frequency connector P1 and a blocking capacitor C1, then the 3.6GHz local oscillation signal with the power level of about-3 dBm 2.5-3.5 GHz OUT1 is obtained through a filter U3, the other path of output baseband signals enter a frequency mixer U8 through a filter U9 and enter the 3.6GHz local oscillation signal with the power level of 13dBm entering the frequency mixer U8 through a radio frequency connector P2 and a blocking capacitor C8, and then the 3.5-3.5 GHz radio frequency signal OUT2 with the power level of about-3 dBm is obtained through a filter U10.

Fig. 4 is a schematic diagram of a 12-15 GHz rf signal generating circuit of a 6GHz instantaneous bandwidth signal microwave generating circuit crossing a Ku band, that is, a schematic diagram of a branching module, a mixing module and a first-stage combining module in a frequency conversion channel (1), including radio frequency connectors P4, P5, P6, P7, dc blocking chip capacitors C13, C16, C17, C18, C19, C24, C27, C28, decoupling capacitors C28, filters U28, C28, a model number of a low noise attenuator of a low noise bare chip model number, a low noise attenuator, a low BW, a selectable model number of an aldb noise attenuator, a low noise attenuator, a high noise amplifier model number of a high noise attenuator, a high bandwidth signal, a high noise amplifier, a high bandwidth signal, a, U26, model ML1-1644LCH-2 mixer die U12, U22, U27, model BW1600 three-way power splitter die U24. Wherein C20 and C22 are +5V power supply decoupling chip capacitances of the mixer die U16, C25 and C26 are +5V power supply decoupling chip capacitances of the low noise amplifier die U19, C14 and C15 are +5V power supply decoupling chip capacitances of the low noise amplifier die U11, C21 and C23 are +5V power supply decoupling chip capacitances of the low noise amplifier die U15, and C33 and C34 are +5V power supply decoupling chip capacitances of the low noise amplifier die U26. 2.5-3.5 GHz radio frequency signals OUT1 with power level of-3 dBm enter a bare chip U16 of the frequency mixer through a blocking chip capacitor C27, and are mixed with 21GHz local oscillation signals with power level of 0dBm entering a bare chip U16 of the frequency mixer through a radio frequency connector P6 and the blocking chip capacitor C24, and then the mixed signals are filtered by a filter U18 to obtain radio frequency signals of 23.5-24.5 GHz. The 23.5-24.5 GHz radio frequency signal is amplified by a blocking chip capacitor C29, an optional attenuator bare chip U17 and a low noise amplifier bare chip U19, and then is divided into three radio frequency signals by a three-way splitter consisting of a chip resistor R1 and a four-way splitter bare chip U20: a first path of radio frequency signal enters a frequency mixer bare chip U12 through a filter U13 and a blocking chip capacitor C17, and is mixed with a 36.5GHz local oscillation signal with a power level of 0dBm entering the frequency mixer bare chip U12 through a radio frequency connector P4, a blocking chip capacitor C13, a low noise amplifier bare chip U11 and a blocking chip capacitor C16, and then is filtered through the blocking chip capacitor C18 and a filter U14 to obtain a 12-13 GHz radio frequency signal; the second path of radio frequency signal enters a frequency mixer bare chip U22 through a filter U21 and a blocking chip capacitor C30, and is mixed with a 37.5GHz local oscillation signal with the power level of 0dBm entering the frequency mixer bare chip U22 through a radio frequency connector P5, a blocking chip capacitor C19, a low noise amplifier bare chip U23 and a blocking chip capacitor C28, and then is filtered through the blocking chip capacitor C31 and a filter U23 to obtain a 13-14 GHz radio frequency signal; the third radio frequency signal enters a mixer bare chip U27 through a filter U28 and a blocking chip capacitor C36, is mixed with a 38.5GHz local oscillation signal with the power level of 0dBm entering the mixer bare chip U27 through a radio frequency connector P7, a blocking chip capacitor C32, a low noise amplifier bare chip U26 and a blocking chip capacitor C35, and is filtered through the blocking chip capacitor C37 and a filter U29 to obtain a 14-15 GHz radio frequency signal. The 12-13 GHz radio frequency signals, the 13-14 GHz radio frequency signals and the 14-15 GHz radio frequency signals are synthesized by a three-way power divider bare chip U24, and then the 12-15 GHz radio frequency signals OUT3 with the power level of-24 dBm are obtained by custom filtering U25.

FIG. 5 is a schematic diagram of a 15-18 GHz signal generating circuit of a 6GHz instantaneous bandwidth signal microwave generating circuit crossing Ku band, that is, a schematic diagram of a frequency conversion channel (2) branching module, a frequency mixing module and a first-stage branching module, including a radio frequency connector P8, P9, P10, P11, a blocking chip capacitor C38, C41, C42, C43, C44, C49, a decoupling chip capacitor C49, a chip resistor R49 of type BW, a filter U49, C49, a low noise attenuator of a low noise bare chip of a model number 49, HMU 49, a low noise attenuator of a noise bare chip 49, a noise attenuator of a filter U49, a low noise attenuator of a filter U49, a SAW 72, a low noise attenuator of a SAW 72, a SAW, mixer die U31, U37, U46 of model ML1-1644LCH-2, three-way power splitter die U43 of model BW 1600. Wherein C45 and C47 are +5V power supply decoupling chip capacitances of the mixer die U35, C50 and C51 are +5V power supply decoupling chip capacitances of the low noise amplifier die U39, C39 and C40 are +5V power supply decoupling chip capacitances of the low noise amplifier die U30, C46 and C48 are +5V power supply decoupling chip capacitances of the low noise amplifier die U34, and C58 and C59 are +5V power supply decoupling chip capacitances of the low noise amplifier die U45. 2.5-3.5 GHz radio frequency signals OUT2 with power level of-3 dBm enter a bare chip U35 of the frequency mixer through a blocking chip capacitor C52 and are mixed with 21GHz local oscillation signals with power level of 0dBm entering a bare chip U35 of the frequency mixer through a radio frequency connector P10 and the blocking chip capacitor C49, and then the signals are filtered by a filter U38 to obtain 23.5-24.5 GHz radio frequency signals. The 23.5-24.5 GHz radio frequency signal is amplified by a DC blocking chip capacitor C54, an optional attenuator bare chip U36 and a low noise amplifier bare chip U39, and then is divided into three radio frequency signals by a three-way splitter consisting of a chip resistor R2 and a four-way splitter bare chip U40: a first path of radio frequency signal enters a frequency mixer bare chip U31 through a filter U32 and a blocking chip capacitor C42, and is mixed with a 39.5GHz local oscillation signal with the power level of 0dBm entering the frequency mixer bare chip U31 through a radio frequency connector P8, a blocking chip capacitor C38, a low noise amplifier bare chip U30 and a blocking chip capacitor C41, and then is filtered through a blocking chip capacitor C43 and a filter U33 to obtain a 15-16 GHz radio frequency signal; the second path of radio frequency signal enters a frequency mixer bare chip U37 through a filter U41 and a blocking chip capacitor C55, and is mixed with a 40.5GHz local oscillation signal with the power level of 0dBm entering the frequency mixer bare chip U37 through a radio frequency connector P9, a blocking chip capacitor C44, a low noise amplifier bare chip U34 and a blocking chip capacitor C53, and then is filtered through the blocking chip capacitor C56 and a filter U42 to obtain a 16-17 GHz radio frequency signal; the third radio frequency signal enters a mixer bare chip U46 through a filter U47 and a blocking chip capacitor C61, is mixed with a 41.5GHz local oscillator with the power level of 0dBm entering the mixer bare chip U46 through a radio frequency connector P11, a blocking chip capacitor C57, a low noise amplifier bare chip U45 and a blocking chip capacitor C60, and is filtered through the blocking chip capacitor C62 and a filter U48 to obtain a 17-18 GHz radio frequency signal. The 15-16 GHz radio frequency signal output by the filter U33, the 16-17 GHz radio frequency signal output by the filter U42 and the 17-18 GHz radio frequency signal output by the filter U48 are combined in a three-way power divider bare chip U43, and then the 15-18 GHz radio frequency signal OUT4 of-24 dBm is obtained through the customized filtering U44.

Fig. 6 is an output circuit schematic diagram of a 6GHz instantaneous bandwidth signal microwave generating circuit crossing Ku band, that is, a circuit schematic diagram of a second-stage combining module, including dc blocking chip capacitors C67, C68, C69, C70, decoupling chip capacitors C63, C64, C65, C66, selectable attenuator dies U49 and U50 of model BW095, a power splitter die U51 of model BW506, a low noise amplifier die U52 of model BW283, a low noise amplifier die U54 of model BW302, and monolithic integrated amplitude equalizers U53 and U55 of model BWAES-6/18-6. The 12-15 GHz radio frequency signal OUT3 and the 15-18 GHz radio frequency signal OUT4 are combined into a 12-18 GHz radio frequency signal through a power divider bare chip U51. The 12-18 GHz radio frequency signal is subjected to broadband amplification through a DC blocking chip capacitor C67, an optional attenuator bare chip U49, a low noise amplifier bare chip U52 and a DC blocking chip capacitor C68, and then compensation is carried out on amplification gain through a single-chip integrated amplitude equalizer U53. The compensated 12-18 GHz radio frequency signals are subjected to broadband amplification through a selectable attenuator bare chip U50, a low noise amplifier bare chip U54 and a blocking chip capacitor C69, and then amplification gain is compensated through a single-chip integrated amplitude equalizer U55 and the blocking chip capacitor C70, so that 6GHz instantaneous bandwidth signals with the power level of 0dBm can be obtained.

In addition, compare the multichannel parallel synthesis technique based on quadrature modulation method, the utility model discloses microwave circuit can solve the defect that non-strict quadrature, amplitude are inconsistent and the carrier is revealed.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A microwave circuit comprising at least one set of frequency conversion channels, each set of frequency conversion channels comprising:

2. The microwave circuit of claim 1, wherein the initialization module comprises a signal source port configured to receive a signal source, an initial local oscillator signal port configured to receive an initial local oscillator signal, and an initial mixer configured to mix the signal source and the initial local oscillator signal and output an initial signal.

3. The microwave circuit according to claim 2, wherein in the initial module, the number of the initial mixers is at least two and are sequentially arranged in series, each of the initial mixers outputs an initial sub-signal, the number of the initial local oscillator signal ports is at least two, and the initial local oscillator signal ports are respectively connected to at least two of the initial mixers; the frequency of the signal source, the at least two initial sub-signals and the initial signal increases from the signal source to the splitting module.

4. A microwave circuit according to claim 3, wherein a filter is connected to the output of each initial mixer; and/or the initial mixer is a subtractive mixer; and/or the initial local oscillator signal port is a radio frequency connector.

5. A microwave circuit in accordance with claim 1, wherein the number of frequency conversion channels is at least two, the microwave circuit further comprising:

6. The microwave circuit according to claim 5, wherein the frequencies of the local oscillator signals received by all the frequency mixing submodules in each of the frequency conversion channels constitute an arithmetic sequence, the frequencies of the local oscillator signals received by all the frequency mixing submodules in all the frequency conversion channels constitute the arithmetic sequence, and the arithmetic value of the arithmetic sequence is equal to the bandwidth of the signal source or the initial signal.

7. A microwave circuit according to claim 6, wherein the bandwidth of the signal source or the initial signal is 0.5 to 2 GHz.

8. A microwave circuit according to claim 7, wherein the bandwidth of the signal source or the initial signal is 1 GHz; the number of the frequency mixing sub-modules in each frequency mixing module is 3, and the bandwidth of the first-stage frequency mixing signal is 3 GHz; the number of the frequency conversion channels is 2, and the bandwidth of the second-stage mixing signal is 6 GHz.

9. The microwave circuit of claim 1, wherein each of the mixing sub-modules comprises a first input terminal coupled to an output terminal of the splitting module, a second input terminal for receiving a local oscillator signal, an output terminal, and a sub-mixer for mixing the split signal and the local oscillator signal and outputting a mixed sub-signal.

10. A microwave circuit according to claim 9, wherein a filter is connected to the output of each sub-mixer; the sub-mixer is a subtraction mixer; the second input end is a radio frequency connector.