CN115882880A - Signal transmission circuit based on multilayer stripline and electronic equipment - Google Patents
Signal transmission circuit based on multilayer stripline and electronic equipment Download PDFInfo
- Publication number
- CN115882880A CN115882880A CN202211347755.XA CN202211347755A CN115882880A CN 115882880 A CN115882880 A CN 115882880A CN 202211347755 A CN202211347755 A CN 202211347755A CN 115882880 A CN115882880 A CN 115882880A
- Authority
- CN
- China
- Prior art keywords
- strip
- layer
- switch
- lines
- stripline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Microwave Amplifiers (AREA)
Abstract
The invention discloses a signal transmission circuit and electronic equipment based on multilayer strip lines, wherein the signal transmission circuit comprises: the multi-path amplitude limiting amplifying circuit comprises a multi-path amplitude limiting amplifying circuit, a signal routing structure and a plurality of combining switches; the signal routing structure comprises a plurality of layers of strip lines, and each layer of strip line comprises a plurality of paths of strip transmission lines; the output end of the multi-path amplitude limiting amplifying circuit is connected with the strip transmission line, and simultaneously transmitted signals are transmitted through the strip transmission lines on different layers, and signals which are not simultaneously transmitted are transmitted through the strip transmission lines on the same layer; the strip transmission lines on the same layer are connected with one combiner switch, and the strip transmission lines on different layers are connected with different combiner switches. The invention adopts a multi-path amplitude limiting amplifying circuit and a multi-layer multi-channel strip line transmission mode to realize the function of any routing among radio frequency channels; and has high isolation and high integration, and realizes the planarization, the dielectrization and the miniaturization of the radio frequency transmission network.
Description
Technical Field
The invention relates to the technical field of radio frequency signal transmission, in particular to a signal transmission circuit based on a multilayer strip line and electronic equipment.
Background
The amplitude limiting amplification switch matrix network is widely applied to the receiving front ends of wireless communication and electronic reconnaissance systems, is mainly used for controlling the transmission path of radio frequency signals, and adopts the port switching technology of the switch matrix to enable radio frequency channels to share a receiver and a frequency synthesizer system, so that the size and the redundancy of a radio frequency system circuit are reduced, and the cost of a radar communication system is reduced.
In a traditional microwave switch matrix, discrete switch modules and coaxial cables are mostly used for cross interconnection, so that the size is large; the insulator through-wall technology is suitable for double-layer radio frequency signal cross transmission, and multilayer signal cross transmission cannot be solved; and the switch matrix network circuit that adopts multilayer to mix clamp plate and activity partition wall to realize has high integrated level, but the isolation is relatively poor. Therefore, how to comprehensively realize higher isolation and miniaturization becomes a problem to be solved urgently for the switch matrix network.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a signal transmission circuit and electronic equipment based on a multilayer strip line.
In order to solve the above technical problem, the present invention provides a signal transmission circuit based on a multi-layer strip line, comprising: the device comprises a plurality of amplitude limiting amplifying circuits with the same structure and different frequencies, a first switch array, a signal routing structure, a second switch array, a plurality of combiner switches and a power supply and control circuit;
the signal routing structure comprises a plurality of layers of laminated strip lines, wherein each layer of strip line comprises a plurality of paths of strip transmission lines;
the output end of the multi-path amplitude limiting amplifying circuit is connected with the input end of the signal routing structure through the first switch array, simultaneously transmitted signals are transmitted through the strip transmission lines on different layers, and signals which are not simultaneously transmitted are transmitted through the strip transmission lines on the same layer; the output end of the signal routing structure is connected with the combining switch through a second switch array, the strip transmission lines on the same layer are connected with one combining switch, and the strip transmission lines on different layers are connected with different combining switches;
the power supply and control circuit is used for providing power supply and control for the multi-path amplitude limiting amplification circuit, the first switch array, the second switch array and the plurality of combining switches.
The beneficial effects of the invention are: the random routing function among radio frequency channels is realized by adopting a multi-channel amplitude limiting amplifying circuit and a multi-layer multi-channel strip line transmission mode; the signal routing structure combs radio-frequency signals, distributes signals transmitted at the same time on different layers of strip lines, and distributes signals transmitted at different times on the same layer of strip lines; the multilayer strip line realizes the cross transmission of microwave radio frequency signals; the more the channel paths, the more the number of layers of the strip lines, but the passive network transmitted by the multilayer strip lines is transmitted in the three-dimensional direction, only the thickness is increased, and the length and the width are not increased. The isolation is improved, the integration level is enhanced through the vertical transmission of the multilayer strip lines, and the planarization, the dielectrization and the miniaturization design of the radio frequency transmission network are realized.
On the basis of the technical scheme, the invention can be further improved as follows.
Furthermore, the signal routing structure is a cuboid structure formed by stacking a plurality of layers of strip lines, a plurality of metal blind grooves are respectively arranged on two long edges of the cuboid structure at equal intervals, the metal blind grooves vertically extend to the bottom layer strip line, a microstrip line is distributed on the upper surface of the bottom layer strip line corresponding to the metal blind grooves, all the microstrip lines on one side of the cuboid structure are used as the input ends of the signal routing structure, and all the microstrip lines on the other side are used as the output ends of the signal routing structure; the bottom layer strip line comprises a plurality of paths of strip transmission lines and also comprises a plurality of paths of strip switching lines, the microstrip line is connected with the strip transmission line or the strip switching line of the bottom layer strip line through a vertical through hole coaxial structure, and the strip switching line is connected with the strip transmission line of the non-bottom layer strip line through a vertical through hole coaxial structure.
The beneficial effect of adopting the further scheme is as follows: the side edge metallization blind slot processing is beneficial to reducing the ground loop path when the signal routing structure is cascaded with the first switch array and the second switch array, thereby improving the discontinuity caused by the cascade connection; all microstrip lines are arranged on the upper surface of the bottom layer strip line, the input and output ends keep the same horizontal height, impedance mismatching during cascading is favorably reduced, the microstrip lines are connected with strip transmission lines or strip switching lines in the bottom layer strip line through vertical through hole coaxial structures, the strip switching lines are connected with the strip transmission lines of the non-bottom layer strip line through the vertical through hole coaxial structures, and interconnection between the input and output ends of the signal routing structure and strip transmission channels of different layers of strip lines is realized; the vertical through hole coaxial structure realizes three-dimensional transmission of microwave radio frequency signals.
Further, the vertical through-hole type coaxial structure includes: a central signal transmitting via and a plurality of shielded vias surrounding the central signal transmitting via by a circle.
The beneficial effect of adopting the further scheme is as follows: a signal hole is formed in a common ground plane of the microstrip line and the bottom layer strip line, the interconnection of the surface microstrip line and the interlayer strip line is realized by using a metalized through hole, and the annular ground hole is formed around the central signal transmission through hole, so that the shielding effect can be achieved, the radiation loss caused by a parasitic parallel plate mode is inhibited, and meanwhile, a coaxial transmission line structure is simulated with the metalized through hole, and the effective transmission of signals is ensured.
Furthermore, two long edges of the cuboid structure are of a sawtooth structure, and the metal blind groove is formed in each sawtooth of the sawtooth structure.
The beneficial effect of adopting the further scheme is as follows: the input port and the output port are arranged to be in a zigzag shape, so that when signals are converted from the microstrip line to the strip line on different layers, the isolation degree is reduced due to the fact that partial space of the strip patch line on the same layer is leaked, metal on the inner side wall of the zigzag groove is wrapped, and good isolation of the strip patch line on the same layer is achieved in a closed space formed by a zigzag side wall metalized wall and the strip line in an upper-lower layer mode.
Further, all sides of the signal routing structure are provided with metal wrapping edges.
Adopt the beneficial effect of above-mentioned further scheme: the side edge metallization wrapping edges are simultaneously connected with the signal ground of each layer in the multilayer mixed pressing plate, and the mutual isolation of the strip lines between different layers is effectively guaranteed.
Further, the first switch array comprises a plurality of first single-pole single-throw switches, and the second switch array comprises a plurality of second single-pole single-throw switches; and a first single-pole single-throw switch is connected between each output end of the amplitude limiting amplifying circuit and the corresponding input end of the signal routing structure, and a second single-pole single-throw switch is connected between the output end of the signal routing structure and the corresponding combiner switch.
The beneficial effect of adopting the further scheme is as follows: the input end and the output end of the signal routing structure are isolated by adopting switches, the requirement of the isolation degree of the strip lines on the same layer is shared, the isolation degree of the whole signal routing structure is effectively improved, the isolation degree between any channels is more than 70dBc when the 1-channel DC-18GHz signal, the 2-channel DC-18GHz signal and the 3-channel DC-18GHz signal of the actually measured signal transmission circuit work simultaneously, and the excellent test performance proves the reasonability and the feasibility of the design; in addition, the channel spacing between the strip lines on the same layer can be reduced by adding the switches, the size of the circuit is further reduced, and the miniaturization design is realized.
Further, when one strip transmission line on the same layer is gated to transmit signals, the first single-pole single-throw switch at the input end of other strip transmission lines on the same layer is disconnected, and the second single-pole single-throw switch at the output end of other strip transmission lines on the same layer is disconnected.
The beneficial effect of adopting the further scheme is as follows: when a certain channel of the strip line on the same layer is gated to transmit signals, the switches on the input ends of other channels of the strip line on the same layer are disconnected, so that the interference of other signals on the matrix network is effectively isolated, the switches on the output ends of other channels of the strip line on the same layer are disconnected, and the signals leaked from the strip line channels on the same layer of the matrix network cannot be interfered to other channels.
Furthermore, the amplitude limiting amplifying circuit comprises an amplitude limiter, a coupler, a first low-noise amplifier, a numerical control attenuator, a filter, an equalizer, a second low-noise amplifier and a power divider which are connected in sequence.
Adopt the beneficial effect of above-mentioned further scheme: the input microwave signal is subjected to large signal amplitude limiting through an amplitude limiter, so that a post-stage amplifying circuit is protected from being burnt; introducing a self-checking signal through a coupler, and carrying out fault detection on a signal routing structure; amplifying the microwave signal by a first low noise amplifier; amplitude adjustment is carried out on the microwave signal through the numerical control attenuator to prevent a post-stage amplifying circuit from entering a saturation state when the input microwave signal is large; filtering the microwave signal through a filter to suppress out-of-band interference; the amplitude fluctuation of the microwave signal is adjusted through an equalizer, and the gain flatness is improved; performing secondary amplification on the microwave signal through a second low noise amplifier; the microwave signals are subjected to power distribution through the power divider and divided into two paths of signals to be output.
Furthermore, the power divider is connected with a plurality of first single-pole single-throw switches.
In order to solve the above technical problem, the present invention further provides an electronic device, including the signal transmission circuit based on the multilayer stripline provided in the above technical solution.
Additional aspects of the invention and its advantages will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a structural diagram of a signal transmission circuit based on a multilayer stripline according to an embodiment of the present invention;
FIG. 2 is a cross-sectional diagram of a signal routing structure according to an embodiment of the present invention;
FIG. 3 is a top view of a signal routing structure according to an embodiment of the present invention;
FIG. 4 is a perspective view of a vertical via-like coaxial structure provided by an embodiment of the present invention;
fig. 5 is a structural diagram of a signal transmission circuit based on a multilayer stripline according to another embodiment of the present invention.
Detailed Description
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure of the present disclosure. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without inventive step, are intended to be within the scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
As shown in fig. 1, a signal transmission circuit based on a multilayer strip line according to an embodiment of the present invention includes: the device comprises an amplitude limiting amplifying circuit, a first switch array, a signal routing structure, a second switch array, a plurality of combining switches and a power supply and control circuit, wherein the amplitude limiting amplifying circuit is of the same multi-path structure and has different frequencies. Wherein, M is the quantity of the amplitude limiting amplifying circuits, and N is the quantity of the combining switches.
As shown in fig. 2, the signal routing structure includes a plurality of stacked striplines, each of which includes an upper ground layer, an upper dielectric layer, a stripline transmission line layer, a lower dielectric layer, and a lower ground layer. The embodiment includes three layers of strip lines, and for the first layer of strip line, the first layer of strip line includes a layer 1 circuit (i.e. an upper stratum), a layer 1 medium, a layer 2 medium, a second layer circuit (a first strip transmission line layer), a layer 3 medium and a layer 3 circuit (i.e. a lower stratum). The number of dielectric layers included by the upper dielectric layer and the lower dielectric layer of each layer of strip line is determined according to actual needs. In this embodiment, a layer 4 medium is disposed between the lower strata of the first layer stripline and the upper strata of the second layer stripline. The second layer of strip lines and the third layer of strip lines share the 6 th layer of circuits and serve as a shared ground layer.
As shown in fig. 3, the strip line layer of each layer of strip lines includes a plurality of ways of strip lines. In fig. 3, solid lines represent 4 strip transmission lines of the strip lines of the first layer, dotted lines represent 4 strip transmission lines of the strip lines of the second layer, and dotted lines represent 2 strip transmission lines of the strip lines of the third layer. The third layer of strip line serves as a bottom transmission line, and the strip patch cord inside the third layer of strip line is not shown in fig. 3.
The output end of the multi-path amplitude limiting amplifying circuit is connected with the input end of the signal routing structure through the first switch array, simultaneously transmitted signals are transmitted through the strip transmission lines on different layers, and signals which are not simultaneously transmitted are transmitted through the strip transmission lines on the same layer; the output end of the signal routing structure is connected with the combiner switch through the second switch array, the strip transmission lines on the same layer are connected with one combiner switch, and the strip transmission lines on different layers are connected with different combiner switches.
The power supply and control circuit is used for providing power supply and control for the plurality of paths of the amplitude limiting amplification circuit, the first switch array, the second switch array and the plurality of combining switches.
The embodiment of the invention adopts a multi-path amplitude limiting amplifying circuit and a multi-layer multi-channel strip line transmission mode, thereby realizing the function of any routing among radio frequency channels; the signal routing structure combs the radio frequency signals, distributes the signals transmitted at the same time on different layers of strip lines, and distributes the signals transmitted at different times on the same layer of strip lines; the multilayer strip line realizes the cross transmission of microwave radio frequency signals; the more the channel paths, the more the number of layers of the strip lines, but the passive network transmitted by the multilayer strip lines is transmitted in the three-dimensional direction, only the thickness is increased, and the length and width dimensions are not increased. The isolation is improved, the integration level is enhanced through the vertical transmission of the multilayer strip lines, and the planarization, the dielectrization and the miniaturization design of the radio frequency transmission network are realized.
Optionally, the signal routing structure is a rectangular structure formed by stacking a plurality of layers of strip lines, a plurality of metal blind grooves are respectively arranged on two long sides of the rectangular structure at equal intervals, the metal blind grooves vertically extend to the bottom layer strip line, a microstrip line is distributed on the upper surface of the bottom layer strip line corresponding to each metal blind groove, all the microstrip lines on one side of the rectangular structure are used as the input ends of the signal routing structure, and all the microstrip lines on the other side are used as the output ends of the signal routing structure; the bottom layer stripline comprises a plurality of paths of striplines and a plurality of paths of striplines, the microstrip line is connected with the stripline or the stripline of the bottom layer stripline through a vertical through hole coaxial structure, and the stripline is connected with the stripline of the non-bottom layer stripline through a vertical through hole coaxial structure.
In the embodiment of the invention, the side edge of the signal routing structure is subjected to metallization blind slot processing, which is beneficial to reducing the ground loop path when the signal routing structure is cascaded with the first switch array and the second switch array, thereby improving discontinuity caused by the cascade connection; all microstrip lines are arranged on the upper surface of the bottom layer strip line, the input and output ends keep the same horizontal height, impedance mismatching during cascading is favorably reduced, the microstrip lines are connected with strip transmission lines or strip switching lines in the bottom layer strip line through vertical through hole coaxial structures, the strip switching lines are connected with the strip transmission lines of the non-bottom layer strip line through the vertical through hole coaxial structures, and interconnection between the input and output ends of the signal routing structure and strip transmission channels of different layers of strip lines is realized; the vertical through hole coaxial structure realizes three-dimensional transmission of microwave radio frequency signals.
As shown in fig. 4, it is assumed that the third layer of strip line is a bottom layer strip line, the metal blind slot extends to the upper surface of the bottom layer strip line (i.e., the third layer of strip line), a microstrip line is disposed on the upper surface of the metal blind slot, the microstrip line is connected to a third layer of strip transmission line (the shielded via hole of the vertical through hole coaxial structure is not shown in the figure) through a vertical through hole coaxial structure, and the third layer of microstrip transmission line is connected to the first layer of strip transmission line through the vertical through hole coaxial structure. The vertical through hole type coaxial structure includes: a central signal transmitting via and a plurality of shielded vias surrounding the central signal transmitting via by a circle. The central signal transmission via may be a through hole, a blind hole or a semi-blind hole depending on which layers of signals are communicated. The number of the shielding through holes in design can be 10, the number is not fixed, and the more the shielding through holes are, the better the shielding through holes are allowed by the technology and the reliability in principle. The shield holes may all be through holes, but if crossing the signal lines, blind holes or semi-blind holes are used.
In the embodiment of the invention, the signal hole is formed on the common ground plane of the microstrip line and the bottom layer strip line, the interconnection of the surface microstrip line and the interlayer strip line is realized by the metallized through hole, and the annular ground hole is arranged around the central signal transmission through hole, so that the shielding effect is achieved, the radiation loss caused by a parasitic parallel plate mode is inhibited, and meanwhile, the coaxial transmission line structure is simulated together with the metallized through hole, and the effective transmission of signals is ensured. The connection of the strip patch cord in the bottom layer strip line and the strip transmission line of the other layer strip line is the same.
Optionally, two long sides of the signal routing structure are in a zigzag structure, and the metal blind slot is arranged on each sawtooth of the zigzag structure. The embodiment of the invention sets the input and output ports of the signal routing structure to be in a zigzag shape, can effectively prevent the reduction of isolation caused by the leakage of part of the space of the strip-shaped patch cord at the same layer when the signal is converted from the microstrip line to the strip line at different layers, and realizes the good isolation of the strip patch cord at the same layer in the closed space formed by the metalized wall at the zigzag side wall and the upper layer and the lower layer of the strip line.
Optionally, all sides of the signal routing structure are provided with metal bordures. The side edge metallization wrapping is simultaneously connected with the signal ground of each layer in the multilayer mixed pressing plate, and the mutual isolation of the strip lines between different layers is effectively ensured.
Optionally, the first switch array comprises a plurality of first single pole single throw switches and the second switch array comprises a plurality of second single pole single throw switches; and a first single-pole single-throw switch is connected between each output end of the amplitude limiting amplifying circuit and the corresponding input end of the signal routing structure, and a second single-pole single-throw switch is connected between the output end of the signal routing structure and the corresponding combiner switch.
In the embodiment of the invention, the input end and the output end of the signal routing structure are isolated by adopting the switches, the requirement of the isolation degree of the strip lines on the same layer is shared, the isolation degree of the whole signal routing structure is effectively improved, the isolation degree between any channels is more than 70dBc when the actually measured signal transmission circuit works simultaneously on 1-channel DC-18GHz, 2-channel DC-18GHz and 3-channel DC-18GHz signals, and the excellent test performance proves the reasonability and feasibility of the design; in addition, the channel spacing between the strip lines on the same layer can be reduced by adding the switches, the size of the circuit is further reduced, and the miniaturization design is realized.
Optionally, when one strip transmission line of the same layer is gated to transmit signals, the first single-pole single-throw switch at the input end of other strip transmission lines of the same layer is turned off, and the second single-pole single-throw switch at the output end of other strip transmission lines of the same layer is turned off. In the embodiment of the invention, when a certain channel of the same-layer strip line is switched on to transmit signals, the switches at the input ends of other channels of the same-layer strip line are switched off, so that the interference of other signals on the matrix network is effectively isolated, and the switches at the output ends of other channels of the same-layer strip line are switched off, thereby ensuring that the signals leaked from the same-layer strip line channel of the matrix network cannot be interfered to other channels.
Optionally, the amplitude limiting amplifying circuit includes an amplitude limiter, a coupler, a first low noise amplifier, a digitally controlled attenuator, a filter, an equalizer, a second low noise amplifier, and a power divider, which are connected in sequence. The power divider is connected with a plurality of first single-pole single-throw switches.
In the embodiment of the invention, the input microwave signal is subjected to large signal amplitude limiting through the amplitude limiter, so that a post-stage amplifying circuit is protected from being burnt; introducing a self-checking signal through a coupler, and carrying out fault detection on a signal routing structure; amplifying the microwave signal by a first low noise amplifier; amplitude adjustment is carried out on the microwave signal through the numerical control attenuator to prevent a post-stage amplifying circuit from entering a saturation state when the input microwave signal is large; filtering the microwave signal through a filter to suppress out-of-band interference; the amplitude fluctuation of the microwave signal is adjusted through an equalizer, and the gain flatness is improved; performing secondary amplification on the microwave signal through a second low-noise amplifier; the microwave signals are subjected to power distribution through the power divider and divided into two paths of signals to be output.
The technical solution of the present invention is described in detail below with a specific example.
As shown in fig. 5, the signal transmission circuit based on the multi-layered strip line includes:
the embodiment of the invention adopts a mode of a four-path amplitude limiting amplifying circuit and a signal routing structure, carries out amplitude limiting, amplifying, filtering, numerical control attenuation, equalization, power division and other processing on the input four-path microwave signals and then outputs the signals, carries out signal routing through a multilayer strip line of the signal routing structure, and synthesizes one-path microwave signal output through a multi-path switch, thereby realizing the function of arbitrary routing among radio frequency channels.
The multilayer stripline-based signal transmission circuit 100 includes: the device comprises a four-way amplitude limiting amplifying circuit 1001, a routing component 1002, a combining switch array 1003 and a power supply and control circuit.
The four-way limiter amplification circuit 1001 includes in order: the device comprises a first amplitude limiting amplifying circuit A1, a second amplitude limiting amplifying circuit B2, a third amplitude limiting amplifying circuit C3 and a fourth amplitude limiting amplifying circuit D4.
The input end and the output end of the signal routing structure are isolated by adopting a single-pole single-throw switch, so that the requirement of the system on the isolation between the channels of the signal routing structure is effectively shared, and the requirement of the signal transmission circuit on high integration is realized.
The combiner switch array 1003 includes a single-pole, four-throw switch U25, a single-pole, four-throw switch V26, and a single-pole, four-throw switch W27.
Specifically, a first output end A1 of a first amplitude limiting amplifying circuit A1 is connected with an input end of a single-pole single-throw switch A5, an output end of the single-pole single-throw switch A5 is connected with an input end of a single-pole single-throw switch K15 through a first strip transmission line of a first layer of strip line, and an output end b1 of the single-pole single-throw switch K15 is connected with a first input end of a single-pole four-throw switch U25; the first output end a3 of the second amplitude limiting amplifying circuit B2 is connected with the input end of a single-pole single-throw switch C7, the output end of the single-pole single-throw switch C7 is connected with the input end of a single-pole single-throw switch L16 through a second strip transmission line of a first layer of strip line, and the output end B2 of the single-pole single-throw switch L16 is connected with the second input end of a single-pole four-throw switch U25; the first output end a6 of the first amplitude limiting amplifying circuit C3 is connected with the input end of a single-pole single-throw switch F10, the output end of the single-pole single-throw switch F10 is connected with the input end of a single-pole single-throw switch M17 through a third strip transmission line of a first layer of strip line, and the output end b3 of the single-pole single-throw switch M17 is connected with the third input end of a single-pole four-throw switch U25; a first output end a9 of the first amplitude limiting amplifying circuit D4 is connected with an input end of a single-pole single-throw switch I13, an output end of the single-pole single-throw switch I13 is connected with an input end of a single-pole single-throw switch N18 through a fourth strip transmission line of a first layer of strip line, and an output end b4 of the single-pole single-throw switch N18 is connected with a fourth input end of a single-pole four-throw switch U25; the output end of the single-pole four-throw switch U25 is the first combined signal output end of the multilayer stripline-based signal transmission circuit 100.
The second output end a2 of the first amplitude limiting amplifying circuit A1 is connected with the input end of a single-pole single-throw switch B6, the output end of the single-pole single-throw switch B6 is connected with the input end of a single-pole single-throw switch O19 through a first strip transmission line of a second layer of strip lines, and the output end B5 of the single-pole single-throw switch O19 is connected with the first input end of a single-pole four-throw switch V26; the second output end a4 of the second amplitude limiting amplifying circuit B2 is connected with the input end of a single-pole single-throw switch D8, the output end of the single-pole single-throw switch D8 is connected with the input end of a single-pole single-throw switch P20 through a second strip transmission line of a second layer of strip lines, and the output end B6 of the single-pole single-throw switch P20 is connected with the second input end of a single-pole four-throw switch V26; the second output end a7 of the first amplitude limiting amplifying circuit C3 is connected with the input end of a single-pole single-throw switch G11, the output end of the single-pole single-throw switch G11 is connected with the input end of a single-pole single-throw switch Q21 through a third strip transmission line of a second layer of strip lines, and the output end b7 of the single-pole single-throw switch Q21 is connected with the third input end of a single-pole four-throw switch V26; the second output end a10 of the first amplitude limiting amplifying circuit D4 is connected with the input end of a single-pole single-throw switch J14, the output end of the single-pole single-throw switch J14 is connected with the input end of a single-pole single-throw switch R22 through a fourth strip transmission line of a second layer of strip line, and the output end b8 of the single-pole single-throw switch R22 is connected with the fourth input end of a single-pole four-throw switch V26; the output end of the single-pole four-throw switch V26 is the second combined signal output end of the multilayer stripline-based signal transmission circuit 100.
A third output end a5 of the second amplitude limiting amplifying circuit B2 is connected with an input end of a single-pole single-throw switch E9, an output end of the single-pole single-throw switch E9 is connected with an input end of a single-pole single-throw switch S23 through a first strip transmission line of a third layer of strip line, and an output end B9 of the single-pole single-throw switch S23 is connected with a first input end of a single-pole two-throw switch W27; a third output end a8 of the third amplitude limiting amplifying circuit C3 is connected with an input end of a single-pole single-throw switch H12, an output end of the single-pole single-throw switch H12 is connected with an input end of a single-pole single-throw switch T24 through a second strip transmission line of a third layer of strip line, and an output end of the single-pole single-throw switch T24 is connected with a second input end of a single-pole double-throw switch W27; the output end of the single-pole double-throw switch W27 is a combined signal output end three of the multilayer stripline-based signal transmission circuit 100.
When the signal transmission circuit 100 based on the multilayer stripline works, a first path of externally input microwave signals firstly enter a first amplitude limiting amplification circuit A1, and the first amplitude limiting amplification circuit A1 carries out amplitude limiting, amplification, filtering, numerical control attenuation, equalization, power division and power division output on the first path of input microwave signals; a second path of externally input microwave signals enter a second amplitude limiting amplifying circuit B2, and the second amplitude limiting amplifying circuit B2 carries out amplitude limiting, amplifying, filtering, numerical control attenuation, equalization, power division and power division output on the second path of input microwave signals; the third path of microwave signal input from outside firstly enters a third amplitude limiting amplifying circuit C3, and the third amplitude limiting amplifying circuit C3 carries out amplitude limiting, amplifying, filtering, numerical control attenuation, equalization, power division and power division on the input third path of microwave signal, and power division is output; the fourth path of externally input microwave signals enter a fourth amplitude limiting amplifying circuit D4, and the fourth amplitude limiting amplifying circuit D4 carries out amplitude limiting, amplifying, filtering, numerical control attenuation, equalization, power division and power division on the input fourth path of microwave signals and outputs the power division.
The first path of microwave signals processed by the first amplitude limiting amplifying circuit A1 passes through a single-pole single-throw switch A5 and a single-pole single-throw switch K15, the second path of microwave signals processed by the second amplitude limiting amplifying circuit B2 passes through a single-pole single-throw switch C7 and a single-pole single-throw switch L16, the third path of microwave signals processed by the third amplitude limiting amplifying circuit C3 passes through a single-pole single-throw switch F10 and a single-pole single-throw switch M17, the fourth path of microwave signals processed by the fourth amplitude limiting amplifying circuit D4 passes through a single-pole single-throw switch I13 and a single-pole single-throw switch N18, the single-pole single-throw switch improves the isolation among the channels, and finally is synthesized into one path of output through a single-pole four-throw switch U25, and the output end of the single-pole four-throw switch U25 is the first combined signal output end of the signal transmission circuit 100 based on the multilayer strip line.
The second path of microwave signals processed by the first amplitude limiting amplifying circuit A1 passes through a single-pole single-throw switch B6 and a single-pole single-throw switch O19, the second path of microwave signals processed by the second amplitude limiting amplifying circuit B2 passes through a single-pole single-throw switch D8 and a single-pole single-throw switch P20, the second path of microwave signals processed by the third amplitude limiting amplifying circuit C3 passes through a single-pole single-throw switch G11 and a single-pole single-throw switch Q21, the second path of microwave signals processed by the fourth amplitude limiting amplifying circuit D4 passes through a single-pole single-throw switch J14 and a single-pole single-throw switch R22, the single-pole single-throw switch improves the isolation among the channels, and finally the signals are combined into one path through a single-pole four-throw switch V26 and output, and the output end of the single-pole four-throw switch V26 is a second combined signal output end of the signal transmission circuit 100 based on the multilayer strip line.
The third microwave signal processed by the second amplitude limiting amplifying circuit B2 passes through a single-pole single-throw switch E9 and a single-pole single-throw switch S23, the third microwave signal processed by the third amplitude limiting amplifying circuit C3 passes through a single-pole single-throw switch H12 and a single-pole single-throw switch T24, the single-pole single-throw switch improves the isolation between the channels, and finally the third microwave signal is synthesized into one path through a single-pole two-throw switch W27 for output, and the output end of the single-pole two-throw switch W27 is the third combined signal output end of the multilayer stripline-based signal transmission circuit 100.
And then selecting the channel isolation degree of the three signals when working simultaneously for analysis.
In the DC-18GHz bandwidth range, the isolation of adjacent strip lines on the same layer is assumed to be 30dB, the isolation of adjacent strip lines on different layers is assumed to be 70dB, and the isolation of the switches A5-W27 is assumed to be 40dB. Assuming that a2-b5 channel, a3-b2 channel and a8-b10 channel are gated, at this time, the first path of microwave input signal is transmitted to the second output end of the combined signal, the second path of microwave input signal is transmitted to the first output end of the combined signal, and the third path of microwave input signal is transmitted to the third output end of the combined signal.
When a signal is input, the path of signal leakage mainly comprises transmission path leakage and space radiation leakage, 4 main isolation leakage paths are listed below, and the rest leakage paths are not listed.
1) a2, when signals are input:
isolation leakage path 1: a2 signal is output to b2 through a switch L16 (closed) by a signal routing structure (different layers of strip line isolation);
isolation degree: 70 (different layer stripline) +0 (switch L16) =70dB;
isolation of leak path 2: a1 and a2 have signals with the same size, the signal a1 passes through a switch A5 (open), a signal routing structure (isolated by the same layer of strip lines) and outputs b2 through a switch L16 (closed);
isolation degree: 40 (switch A5) +30 (same-layer stripline) +0 (switch L16) =70dB.
Isolation of leakage path 3: a1 and a2 have signals with the same size, the signal a1 is output to b1 through a switch K15 (disconnected) by a switch A5 (disconnected) and a signal routing structure (transmission of the same-layer strip line);
isolation degree: 40 (switch A5) +40 (switch K15) =80dB.
Isolation of leakage path 4: a2 signal is output to b10 through a switch T24 (closed) by a signal routing structure (different layers of strip line isolation);
isolation degree: 70 (different layer stripline) +0 (T24) =70dB;
2) a3, when signals are input:
isolation leakage path 1: a3 signal is output to b5 through a switch O19 (closed) by a signal routing structure (different layers of strip line isolation);
isolation degree: 70 (different layer stripline) +0 (switch O19) =70dB;
isolation of leak path 2: a4 and a3 have signals with the same size, the a4 signal passes through a switch D8 (open), a switch matrix (isolated by the strip lines on the same layer) and is output to b5 through a switch O19 (closed);
isolation degree: 40 (switch D8) +30 (same-layer stripline) +0 (switch O19) =70dB.
Isolation of leak path 3: a4 and a3 have signals with the same size, the a4 signal passes through a switch D8 (disconnected), a signal routing structure (transmission of the same layer of strip lines) and is output to b6 through a switch P20 (disconnected);
isolation degree: 40 (switch D8) +40 (switch P20) =80dB.
Isolation of leakage path 4: a3 signal is output to b10 through a switch T24 (closed) by a switch matrix (different layers of strip line isolation);
isolation degree: 70 (different layer stripline) +0 (switch T24) =70dB;
isolation of leakage path 5: a5 and a3 have signals with the same size, the signal a5 is output to b9 through a switch E9 (disconnected) and a signal routing structure (transmission of the same layer of strip lines) via a switch S23 (disconnected);
isolation degree: 40 (switch D8) +40 (switch S23) =80dB.
3) a8, when the signal is input, the signal is output,
isolation leakage path 1: a8 signal passes through a signal routing structure (different layers of strip lines are isolated) and is output to b2 through a switch L16 (closed);
isolation degree: 70 (different layer stripline) +0 (switch L16) =70dB;
isolation of leak path 2: a8 and a6 have signals with the same size, the signal a6 passes through a switch F10 (open), a signal routing structure (isolated by the same layer of strip lines), and b2 is output through a switch L16 (closed);
isolation degree: 40 (switch F10) +30 (stripline on the same layer) +0 (switch L16) =70dB.
Isolation of leakage path 3: a8 and a6 have signals with the same size, the signal a6 is output to b1 through a switch M17 (disconnected) by a switch F10 (disconnected) and a signal routing structure (transmission of the same-layer strip line);
isolation degree: 40 (switch F10) +40 (switch M17) =80dB.
Isolation of leakage path 4: a8 signal is output to b5 through a switch O19 (closed) by a signal routing structure (different layers of strip line isolation);
isolation degree: 70 (different layer stripline) +0 (switch O19) =70dB;
isolation of leak path 5: a8 and a7 have signals with the same size, the signal a7 passes through a switch G11 (open), the signal routing structure is isolated from the strip line at the same layer, and the signal routing structure is output to b5 through a switch O19 (closed);
isolation degree: 40 (switch D8) +30 (same-layer stripline) +0 (switch O19) =70dB.
Isolation of the leak path 6: a8 and a7 have signals with the same size, the signal a7 is transmitted by a strip line on the same layer of the signal routing structure through a switch G11 (disconnected), and is output to b6 through a switch Q21 (disconnected);
isolation degree: 40 (switch G11) +40 (switch Q21) =80dB.
The following can be obtained by the analysis calculation: the channels which are transmitted simultaneously are distributed on different layers of strip lines, the isolation degree of a transmission circuit mainly depends on the isolation degrees of the strip lines on different layers, and the isolation degree of the strip lines on the same layer can improve the isolation degree of a matrix network by adding switches. The electric field distribution of different layers of strip lines is sealed in the sealed space of the upper layer, the lower layer and the metal wrapping edges at two sides, and the isolation can be designed to be very high. And the strip line in the same layer can be used for cascading a plurality of switches according to the isolation requirement to reduce the pressure of crosstalk between channels.
The signal transmission circuit 100 based on the multilayer strip line of the embodiment of the invention adopts a mode of a four-path amplitude limiting amplifying circuit and a signal routing structure, switches and outputs four paths of input microwave signal power dividing switches, distributes simultaneously transmitted signals on different layers of strip lines with high completely shielding isolation, and distributes the signals transmitted at different times on the strip line at the same layer, thereby realizing any routing function among radio frequency channels; and the input end and the output end of the signal routing structure are isolated by adopting a single-pole single-throw switch, so that the requirement of the system on the isolation between the matrix network circuit channels is effectively shared, the isolation between any channels is more than 70dBc when the 1-channel, 2-channel and 3-channel DC-18GHz signals of the signal routing structure are simultaneously operated in an actual measurement manner, and the design rationality and feasibility are proved by excellent test performance. The transmission of radio frequency signals in the three-dimensional direction is realized by the multilayer strip lines, the channel spacing between the strip lines on the same layer can be reduced by adding the switches, the volume is reduced to 1/3 of that of a conventional assembly, high isolation is realized, and the planarization, dielectrization and miniaturization design is realized.
The embodiment of the invention also provides electronic equipment which comprises the signal transmission circuit based on the multilayer strip line provided by the technical scheme.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multilayer stripline-based signal transmission circuit, comprising: the device comprises a plurality of amplitude limiting amplifying circuits with the same structure and different frequencies, a first switch array, a signal routing structure, a second switch array, a plurality of combiner switches and a power supply and control circuit;
the signal routing structure comprises a plurality of layers of laminated strip lines, wherein each layer of strip line comprises a plurality of paths of strip transmission lines;
the output ends of the plurality of paths of amplitude limiting amplifying circuits are connected with the input end of the signal routing structure through a first switch array, simultaneously transmitted signals are transmitted through strip transmission lines on different layers, and simultaneously transmitted signals are transmitted through strip transmission lines on the same layer; the output end of the signal routing structure is connected with the combiner switch through the second switch array, the strip transmission lines on the same layer are connected with one combiner switch, and the strip transmission lines on different layers are connected with different combiner switches;
the power supply and control circuit is used for providing power supply and control for the plurality of paths of the amplitude limiting amplification circuit, the first switch array, the second switch array and the plurality of combining switches.
2. The signal transmission circuit based on the multilayer striplines as claimed in claim 1, wherein the signal routing structure is a rectangular parallelepiped structure formed by stacking the multilayer striplines, a plurality of metal blind slots are respectively arranged on two long sides of the rectangular parallelepiped structure at equal intervals, the metal blind slots vertically extend to the bottom striplines, a microstrip line is arranged on the upper surface of the bottom striplines corresponding to the metal blind slots, all the microstrip lines on one side of the rectangular parallelepiped structure are used as input ends of the signal routing structure, and all the microstrip lines on the other side are used as output ends of the signal routing structure;
the bottom layer stripline comprises a plurality of paths of striplines and a plurality of paths of striplines, the microstrip line is connected with the stripline or the stripline of the bottom layer stripline through a vertical through hole coaxial structure, and the stripline is connected with the stripline of the non-bottom layer stripline through a vertical through hole coaxial structure.
3. The multilayer stripline-based signal transmission circuit of claim 2, wherein the vertical via-like coaxial structure comprises: the circuit comprises a central signal transmission through hole and a plurality of shielding through holes surrounding the central signal transmission through hole in a circle.
4. The multilayer stripline-based signal transmission circuit as recited in claim 2, wherein the two long sides of the rectangular parallelepiped structure are saw-toothed structures, and the metal blind slot is disposed on each saw tooth of the saw-toothed structures.
5. The multilayer stripline-based signal transmission circuit of claim 2, wherein all sides of the signal routing structure are provided with a metal border.
6. The multi-layer stripline-based signal transmission circuit as recited in any of claims 1-5, wherein the first switch array comprises a plurality of first single-pole single-throw switches, and the second switch array comprises a plurality of second single-pole single-throw switches; the first single-pole single-throw switch is connected between each output end of the amplitude limiting amplification circuit and the corresponding input end of the signal routing structure, and the second single-pole single-throw switch is connected between the output end of the signal routing structure and the corresponding combiner switch.
7. The multi-layer strip line based signal transmission circuit as claimed in claim 6, wherein when one strip line of the same layer is gated to transmit signals, the first single-pole single-throw switch at the input end of the other strip line of the same layer is turned off, and the second single-pole single-throw switch at the output end of the other strip line of the same layer is turned off.
8. The multi-layer strip line based signal transmission circuit of claim 6, wherein the amplitude limiting amplification circuit comprises an amplitude limiter, a coupler, a first low noise amplifier, a numerical control attenuator, a filter, an equalizer, a second low noise amplifier and a power divider, which are connected in sequence.
9. The multi-layer stripline-based signal transmission circuit of claim 8, wherein the power splitter is connected to a plurality of the first single-pole single-throw switches.
10. An electronic device comprising the multilayer stripline-based signal transmission circuit as recited in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211347755.XA CN115882880A (en) | 2022-10-31 | 2022-10-31 | Signal transmission circuit based on multilayer stripline and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211347755.XA CN115882880A (en) | 2022-10-31 | 2022-10-31 | Signal transmission circuit based on multilayer stripline and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115882880A true CN115882880A (en) | 2023-03-31 |
Family
ID=85759201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211347755.XA Pending CN115882880A (en) | 2022-10-31 | 2022-10-31 | Signal transmission circuit based on multilayer stripline and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115882880A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116827321A (en) * | 2023-08-28 | 2023-09-29 | 中国电子科技集团公司第二十九研究所 | Switch and resistor-based switch routing circuit and application method thereof |
-
2022
- 2022-10-31 CN CN202211347755.XA patent/CN115882880A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116827321A (en) * | 2023-08-28 | 2023-09-29 | 中国电子科技集团公司第二十九研究所 | Switch and resistor-based switch routing circuit and application method thereof |
| CN116827321B (en) * | 2023-08-28 | 2023-12-05 | 中国电子科技集团公司第二十九研究所 | Switch and resistor-based switch routing circuit and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11228921B2 (en) | Apparatus and methods for radio frequency signal boosters | |
| WO2022001746A1 (en) | Radio frequency circuit and electronic device | |
| CN105846019B (en) | Double-layer cavity common-port combiner | |
| AU2020332428B2 (en) | Radio frequency front-end circuit and mobile terminal | |
| US11211967B2 (en) | Full-duplex single-panel antenna system for satellite and telecommunicaiton systems | |
| EP2698865A1 (en) | Switching ferrite circulator with an electronically selectable operating frequency band | |
| US20090058556A1 (en) | Antenna end filter arrangement | |
| CN115882880A (en) | Signal transmission circuit based on multilayer stripline and electronic equipment | |
| CN111327345B (en) | Antenna isolation method, time delay network and equipment thereof | |
| Cruickshank | Implementing full duplexing for 5G | |
| CN212677159U (en) | Novel 16 passageway X wave band receiving and dispatching subassembly | |
| US10200078B2 (en) | Multiplexer and mobile communication device comprising a multiplexer | |
| JP2006514461A (en) | Front-end circuit | |
| RU2707987C1 (en) | Multichannel power distributor | |
| EP1819061A2 (en) | Frequency converter for receiving satellite broadcast | |
| CN111261985A (en) | Miniaturized multi-channel radio frequency large dynamic attenuation circuit structure and corresponding shielding device | |
| RU2694117C1 (en) | Module for switching low-power microwave signals and a method of switching microwave signals in a decoupling device | |
| CN210956939U (en) | L wave band signal divides combiner | |
| Xiao et al. | Four-port MIMO Filtenna Based on Multi-layer Suspended Coplanar Waveguide | |
| JP2017510204A (en) | Radio frequency signal path with nearly constant phase shift over a wide frequency band | |
| CN115441899A (en) | Delay network, analog cancellation module comprising delay network and electronic equipment | |
| CN114678701A (en) | Millimeter wave switchable MIMO antenna unit and antenna array | |
| CN114024567A (en) | Multi-tap delay circuit and design method thereof | |
| CN114006179A (en) | 64-unit mixed beam forming active antenna array | |
| CN115051960A (en) | HTCC-based switching network module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |