CN209823743U - Distributed local oscillator terahertz superheterodyne array receiver - Google Patents
Distributed local oscillator terahertz superheterodyne array receiver Download PDFInfo
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Abstract
The utility model discloses a distributing type local oscillator terahertz superheterodyne array receiver, include: receiver array, merit divide ware and synchronous signal source, every way receiver structure is the same in the array, and every way receiver all includes: the receiver antenna is used for receiving signals, the frequency mixer, the intermediate frequency processing unit and the amplification frequency multiplication link, the receiver antenna is connected with the frequency mixer, the signals received by the receiver antenna are sent to the frequency mixer after being screened, and the synchronous signal source is sent to the frequency mixer after passing through the power divider and the amplification frequency multiplication link to be subjected to difference frequency with the received signals. The high-sensitivity single chip integrated detection array system with low cost is realized by the mode, the expandable superheterodyne array is constructed, the expansibility limit caused by the limitation of the power of the traditional centralized local oscillation source is broken through, and meanwhile, a brand new distributed local oscillation amplification frequency multiplication link is combined with a synchronous signal source to realize the high-sensitivity expandable superheterodyne array receiver.
Description
Technical Field
The invention relates to a terahertz wave detection principle based on the superheterodyne of a CMOS or III-IV family material solid-state circuit, in particular to a distributed local oscillator terahertz superheterodyne array receiver.
Background
Radio technology equipment such as communication, radar, navigation, remote sensing, broadcasting, television and the like transmit information through radio waves, and the radio waves are required to be radiated and received. The receiver is an important component of the overall system and has a direct impact on system performance. The terahertz frequency band receiver has the function of dividing and moving the frequency spectrum of the high-frequency electromagnetic signal, and has the advantages of high sensitivity, high detection precision, coherent detection function and the like.
With the breakthrough of millimeter wave terahertz integrated circuits, array receivers gradually become a common means and a technological development trend for improving communication rate and radar imaging speed. The multichannel array superheterodyne receiver can acquire 0-360-degree intensity phase information below the working frequency 1THz, not only can realize 3D imaging, but also can identify substance frequency spectrum information, and has important significance on detection and characterization of material characteristics. Low cost large scale array receivers are a prerequisite for industry and commercialization.
However, the traditional terahertz superheterodyne array receiver based on silicon-based or III-V materials usually adopts a centralized local oscillator design (as shown in fig. 1), and outputs a synchronization signal to each channel through a power divider after passing through an amplification frequency multiplication chain. The method has the advantages of reducing cost and design difficulty and quickly realizing multi-channel synchronization and superheterodyne detection among arrays. However, the power of the local oscillation chain is reduced along with the increase of the number of array channels, and the noise is correspondingly increased, so that the number of array channels of the receiver cannot be linearly expanded in a large scale, and the cost of the receiver is high.
The distributed local oscillator terahertz superheterodyne array receiver moves the amplification frequency multiplication chain forward to the front of the power divider, an antenna, a frequency mixing chain and the amplification frequency multiplication chain are designed on the same single chip in the chip design of the terahertz superheterodyne array receiver made of silicon-based or III-V group materials, and a synchronous signal source is input to the amplification frequency multiplication chain of each channel after passing through the power divider to realize the signal synchronization of all the channels, so that the coherent detection of the array receiver is realized. The difficulty is that the antenna, the frequency mixing and the amplification frequency multiplication chain are designed on the same single chip, the design and simulation difficulty is increased, and the volume is increased compared with the traditional mode. But the advantage is that the super heterodyne array receiver can perform linear expansion, and the number of channels can no longer be limited by the traditional centralized design, so the cost of the array receiver will be greatly reduced while the performance of the array receiver remains stable.
Disclosure of Invention
The invention mainly solves the technical problem of how to provide a low-cost and high-sensitivity single-chip integrated detection array system, construct an expandable superheterodyne array, and emphatically break through the expansibility limitation caused by the limitation of the power of the traditional centralized local oscillation source, and simultaneously realize a high-sensitivity expandable superheterodyne array receiver by combining a brand-new distributed local oscillation amplification frequency multiplication link with a synchronous signal source.
In order to solve the technical problems, the invention adopts a technical scheme that: a distributed local oscillator terahertz superheterodyne array receiver is provided, including: the device comprises a receiver array, a power divider and a synchronous signal source, wherein the synchronous signal source and the power divider are connected with each other. The power divider is connected with each receiver in the receiver array, and the synchronous signal source provides synchronous signals for each amplified frequency multiplication chain of the receiver after passing through the power divider, so that coherent detection of the array receiver is realized.
Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna for receiving and screening detection signals, a frequency mixer for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit for outputting baseband signals to a rear end signal processing part and an amplification frequency multiplication link for signal amplification frequency multiplication function, wherein the receiver antenna is connected with the frequency mixer.
The signal received by the antenna of the receiver is sent to a mixer after being screened, and the synchronous signal source is sent to the mixer after passing through a power divider and an amplification frequency multiplication link to carry out difference frequency with the received signal.
Optionally, the intermediate frequency processing unit includes an intermediate frequency link and an intermediate frequency amplifying filter, the intermediate frequency link and the intermediate frequency amplifying filter are connected to each other, the received signal is filtered and received by the receiver antenna, and is sent to the mixer, and then is subjected to difference frequency with the synchronous signal source passing through the local oscillator amplifying and frequency doubling circuit to obtain an intermediate frequency signal, and then the intermediate frequency signal is subjected to intermediate frequency amplifying and filtering to output an I/Q signal to the digital signal processing part.
Optionally, the mixer is a harmonic mixer or a fundamental wave mixer.
Optionally, the amplification frequency multiplication chain is a distributed local oscillator amplification frequency multiplication chain.
Optionally, the detection signal is a terahertz frequency band or a millimeter wave frequency band.
Optionally, the signal received by the receiver antenna is filtered and then sent to a mixer, or the signal received by the receiver antenna is filtered and then sent to the mixer after being amplified by a low noise amplifier.
Optionally, the synchronization signal source is a phase-locked loop oscillator or a frequency synthesizer.
The invention has the beneficial effects that: a low-cost high-sensitivity single chip integrated detection array system constructs an expandable superheterodyne array, emphatically breaks through the expansibility limitation brought by the limitation of the power of a traditional centralized local oscillation source, and simultaneously adopts a brand new distributed local oscillation amplification frequency multiplication link to be combined with a synchronous signal source to realize a high-sensitivity expandable superheterodyne array receiver.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
fig. 1 is a schematic diagram of a conventional centralized local oscillator superheterodyne receiving array in the prior art;
FIG. 2 is a schematic diagram of a distributed local oscillator terahertz superheterodyne array receiver according to an embodiment of the present invention;
wherein, the corresponding relation between the reference numbers and the part names in the figure is as follows: 1. an array of receivers; 2. a power divider; 3. a synchronization signal source; 11. a receiver antenna; 12. a mixer; 13. an intermediate frequency processing unit; 14. amplifying the frequency multiplication link; 131. an intermediate frequency link; 132. and an intermediate frequency amplifying filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the drawings, in one embodiment of the present invention, a distributed local oscillator terahertz superheterodyne array receiver is provided,
example 1:
a distributed local oscillator terahertz superheterodyne array receiver comprises: the device comprises a receiver array 1, a power divider 2 and a synchronous signal source 3, wherein the synchronous signal source 3 and the power divider 2 are connected with each other. The power divider 2 is connected with each receiver in the receiver array 1, and the synchronous signal source 3 provides a synchronous signal for each receiver to amplify the frequency multiplication chain after passing through the power divider 2, so that coherent detection of the array receiver is realized. Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna 11 for receiving and screening detection signals, a mixer 12 for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit 13 for outputting baseband signals to a rear end signal processing part, and an amplification frequency multiplication link 14 for signal amplification frequency multiplication function, wherein the receiver antenna 11 and the mixer 12 are connected with each other. The signal received by the antenna 11 of the receiver is filtered and sent to the mixer 12, and the synchronous signal source 3 is sent to the mixer 12 after passing through the power divider 2 and the amplified frequency multiplication link 14 to perform difference frequency with the received signal. The detection signal is a terahertz frequency band or a millimeter wave frequency band.
Example 2:
a distributed local oscillator terahertz superheterodyne array receiver comprises: the device comprises a receiver array 1, a power divider 2 and a synchronous signal source 3, wherein the synchronous signal source 3 and the power divider 2 are connected with each other. The power divider 2 is connected with each receiver in the receiver array 1, and the synchronous signal source 3 provides a synchronous signal for each receiver to amplify the frequency multiplication chain after passing through the power divider 2, so that coherent detection of the array receiver is realized. Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna 11 for receiving and screening detection signals, a mixer 12 for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit 13 for outputting baseband signals to a rear end signal processing part, and an amplification frequency multiplication link 14 for signal amplification frequency multiplication function, wherein the receiver antenna 11 and the mixer 12 are connected with each other. The signal received by the antenna 11 of the receiver is filtered and sent to the mixer 12, and the synchronous signal source 3 is sent to the mixer 12 after passing through the power divider 2, the amplified frequency multiplication link 14 and the intermediate frequency processing unit 13. The detection signal is a terahertz frequency band or a millimeter wave frequency band. The intermediate frequency processing unit 13 comprises an intermediate frequency link 131 and an intermediate frequency amplifying filter 132, the intermediate frequency link 131 and the intermediate frequency amplifying filter 132 are connected with each other, a received signal is screened and received by the receiver antenna 11, is sent to the mixer 12, is mixed with the synchronous signal source 3 passing through the local oscillation amplifying and frequency doubling circuit to obtain an intermediate frequency signal, and then is amplified and filtered by the intermediate frequency to output an I/Q signal to the digital signal processing part.
Example 3:
a distributed local oscillator terahertz superheterodyne array receiver comprises: the device comprises a receiver array 1, a power divider 2 and a synchronous signal source 3, wherein the synchronous signal source 3 and the power divider 2 are connected with each other. The power divider 2 is connected with each receiver in the receiver array 1, and the synchronous signal source 3 provides a synchronous signal for each receiver to amplify the frequency multiplication chain after passing through the power divider 2, so that coherent detection of the array receiver is realized. Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna 11 for receiving and screening detection signals, a mixer 12 for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit 13 for outputting baseband signals to a rear end signal processing part, and an amplification frequency multiplication link 14 for signal amplification frequency multiplication function, wherein the receiver antenna 11 and the mixer 12 are connected with each other. The signal received by the antenna 11 of the receiver is filtered and sent to the mixer 12, and the synchronous signal source 3 is sent to the mixer 12 after passing through the power divider 2 and the amplified frequency multiplication link 14 to perform difference frequency with the received signal.
The detection signal is a terahertz frequency band or a millimeter wave frequency band. The intermediate frequency processing unit 13 comprises an intermediate frequency link 131 and an intermediate frequency amplifying filter 132, the intermediate frequency link 131 and the intermediate frequency amplifying filter 132 are connected with each other, a received signal is screened and received by the receiver antenna 11, is sent to the mixer 12, is mixed with the synchronous signal source 3 passing through the local oscillation amplifying and frequency doubling circuit to obtain an intermediate frequency signal, and then is amplified and filtered by the intermediate frequency to output an I/Q signal to the digital signal processing part. The mixer 12 is a harmonic mixer or a fundamental wave mixer, and the amplification and frequency multiplication chain 14 is a distributed local oscillation amplification and frequency multiplication chain.
Example 4:
a distributed local oscillator terahertz superheterodyne array receiver comprises: the device comprises a receiver array 1, a power divider 2 and a synchronous signal source 3, wherein the synchronous signal source 3 and the power divider 2 are connected with each other. The power divider 2 is connected with each receiver in the receiver array 1, and the synchronous signal source 3 provides a synchronous signal for each receiver to amplify the frequency multiplication chain after passing through the power divider 2, so that coherent detection of the array receiver is realized. Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna 11 for receiving and screening detection signals, a mixer 12 for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit 13 for outputting baseband signals to a rear end signal processing part, and an amplification frequency multiplication link 14 for signal amplification frequency multiplication function, wherein the receiver antenna 11 and the mixer 12 are connected with each other. The signal received by the antenna 11 of the receiver is filtered and sent to the mixer 12, and the synchronous signal source 3 is sent to the mixer 12 after passing through the power divider 2 and the amplified frequency multiplication link 14 to perform difference frequency with the received signal.
The detection signal is a terahertz frequency band or a millimeter wave frequency band. The intermediate frequency processing unit 13 comprises an intermediate frequency link 131 and an intermediate frequency amplifying filter 132, the intermediate frequency link 131 and the intermediate frequency amplifying filter 132 are connected with each other, a received signal is screened and received by the receiver antenna 11, is sent to the mixer 12, is mixed with the synchronous signal source 3 passing through the local oscillation amplifying and frequency doubling circuit to obtain an intermediate frequency signal, and then is amplified and filtered by the intermediate frequency to output an I/Q signal to the digital signal processing part. The mixer 12 is a harmonic mixer or a fundamental wave mixer, and the amplification and frequency multiplication chain 14 is a distributed local oscillation amplification and frequency multiplication chain. Each receiver in the receiver array 1 is provided with a common antenna.
Example 5:
a distributed local oscillator terahertz superheterodyne array receiver comprises: the device comprises a receiver array 1, a power divider 2 and a synchronous signal source 3, wherein the synchronous signal source 3 and the power divider 2 are connected with each other. The power divider 2 is connected with each receiver in the receiver array 1, and the synchronous signal source 3 provides a synchronous signal for each receiver to amplify the frequency multiplication chain after passing through the power divider 2, so that coherent detection of the array receiver is realized. Each receiver in the array has the same structure, and each receiver comprises: the system comprises a receiver antenna 11 for receiving and screening detection signals, a mixer 12 for realizing the function of difference frequency between received signals and local oscillation signals, an intermediate frequency processing unit 13 for outputting baseband signals to a rear end signal processing part, and an amplification frequency multiplication link 14 for signal amplification frequency multiplication function, wherein the receiver antenna 11 and the mixer 12 are connected with each other. The signal received by the antenna 11 of the receiver is filtered and sent to the mixer 12, and the synchronous signal source 3 is sent to the mixer 12 after passing through the power divider 2 and the amplified frequency multiplication link 14 to perform difference frequency with the received signal.
The detection signal is a terahertz frequency band or a millimeter wave frequency band. The intermediate frequency processing unit 13 comprises an intermediate frequency link 131 and an intermediate frequency amplifying filter 132, the intermediate frequency link 131 and the intermediate frequency amplifying filter 132 are connected with each other, a received signal is screened and received by the receiver antenna 11, is sent to the mixer 12, is mixed with the synchronous signal source 3 passing through the local oscillation amplifying and frequency doubling circuit to obtain an intermediate frequency signal, and then is amplified and filtered by the intermediate frequency to output an I/Q signal to the digital signal processing part. The mixer 12 is a harmonic mixer or a fundamental wave mixer, and the amplification and frequency multiplication chain 14 is a distributed local oscillation amplification and frequency multiplication chain. Each receiver in the receiver array 1 is provided with an independent antenna.
Example 6:
a distributed local oscillator terahertz superheterodyne array receiver comprises a receiver antenna 11, a frequency mixer 12, a distributed local oscillator amplification frequency multiplication link 14, an intermediate frequency link 131 and a synchronous signal source 3; the received signal is screened and received by the antenna 11 of the receiver and is sent to the mixer 12 to be mixed with the synchronous signal source 3 passing through the local oscillator amplification frequency doubling circuit to obtain an intermediate frequency signal, and the intermediate frequency signal is amplified and filtered to output an I/Q signal to the digital signal processing part. Each receiver in the array is provided with an independent amplification frequency multiplication chain, so that the signal amplification frequency multiplication function is realized, and finally the signal is input into the mixer 12 to realize heterodyne detection. The array adopts a uniform synchronous signal source 3 to provide a synchronous signal for each receiver amplification frequency multiplication chain after passing through a power divider 2, thereby realizing array receiver coherent detection.
Each receiver in the array is provided with an independent harmonic mixer 12 for realizing the difference frequency function of the received signal and the local oscillator signal. Each receiver in the array is provided with an independent if processing unit 13 for outputting baseband signals to the back-end signal processing section. Each receiver in the array is provided with an independent receiving antenna for screening and receiving received signals.
In a specific implementation process, a distributed local oscillator terahertz superheterodyne array receiver includes a receiver antenna 11, a mixer 12, a distributed local oscillator amplification frequency multiplication link 14, an intermediate frequency link 131, and a synchronous signal source 3; the received signal is screened and received by the antenna, and is sent to the mixer 12 to be mixed with the synchronous signal source 3 passing through the local oscillator amplification frequency doubling circuit to obtain an intermediate frequency signal, and then the intermediate frequency signal is amplified and filtered to output an I/Q signal to the digital signal processing part.
The distributed local oscillator terahertz superheterodyne array receiver can be designed by adopting a silicon substrate or III-IV materials. Each channel of the distributed local oscillator terahertz superheterodyne array receiver can be designed to be a shared antenna or an independent antenna. The distributed local oscillator terahertz superheterodyne array receiver can be built by adopting a single chip design or an independent device. The distributed local oscillator terahertz superheterodyne array receiver can work in a normal-temperature or low-temperature environment, and can work in a terahertz frequency band or a millimeter wave frequency band. The receiving signals of the receiver antenna are screened and then sent into a frequency mixer, or the receiving signals of the receiver antenna are screened and then sent into the frequency mixer after being amplified by a low noise amplifier, and a synchronous signal source is a phase-locked loop oscillator or a frequency synthesizer.
Therefore, the invention has the following advantages: a low-cost high-sensitivity single chip integrated detection array system constructs an expandable superheterodyne array, emphatically breaks through the expansibility limitation brought by the limitation of the power of a traditional centralized local oscillation source, and simultaneously adopts a brand new distributed local oscillation amplification frequency multiplication link to be combined with a synchronous signal source to realize the high-sensitivity expandable superheterodyne array receiver system.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A distributed local oscillator terahertz superheterodyne array receiver comprises: receiver array (1), merit divide ware (2) and synchronous signal source (3), synchronous signal source (3) and merit divide the ware (2) between interconnect, merit divide ware (2) and each way receiver in receiver array (1) to be connected respectively, synchronous signal source (3) pass through behind merit divide ware (2) for each way receiver amplification frequency multiplication chain provide synchronous signal to realize array receiver coherent detection, its characterized in that, each way receiver structure is the same in the array, and each way receiver all includes: the receiver comprises a receiver antenna (11) for receiving and screening detection signals, a frequency mixer (12) for realizing the difference frequency function between the received signals and local oscillation signals, an intermediate frequency processing unit (13) for outputting baseband signals to a rear end signal processing part and an amplification frequency multiplication link (14) for amplifying and frequency multiplication functions of the signals, wherein the receiver antenna (11) and the frequency mixer (12) are connected with each other, the signals received by the receiver antenna (11) are sent to the frequency mixer (12) after being screened, and a synchronous signal source (3) passes through a power divider (2) and then is sent to the frequency mixer (12) to carry out difference frequency with the received signals after passing through the amplification frequency multiplication link (14).
2. The distributed local oscillator terahertz superheterodyne array receiver according to claim 1, wherein the intermediate frequency processing unit (13) includes an intermediate frequency link (131) and an intermediate frequency amplification filter (132), the intermediate frequency link (131) and the intermediate frequency amplification filter (132) are connected to each other, a received signal is screened and received by a receiver antenna (11), then is sent to a mixer (12) and is mixed with a synchronous signal source (3) passing through a local oscillator amplification frequency doubling circuit to obtain an intermediate frequency signal, and then is subjected to intermediate frequency amplification and filtering to output an I/Q signal to the digital signal processing part.
3. The distributed local oscillator terahertz superheterodyne array receiver of claim 2, wherein the mixer (12) is a harmonic mixer or a fundamental mixer.
4. The distributed local oscillator terahertz superheterodyne array receiver of claim 1, wherein the amplification and frequency multiplication link (14) is a distributed local oscillator amplification and frequency multiplication link.
5. The distributed local oscillator terahertz superheterodyne array receiver of claim 1, wherein the detection signal is a terahertz frequency band or a millimeter wave frequency band.
6. The distributed local oscillator terahertz superheterodyne array receiver of claim 1, wherein the synchronization signal source (3) is a phase-locked loop oscillator or a frequency synthesizer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110190864A (en) * | 2019-07-04 | 2019-08-30 | 苏州特拉芯光电技术有限公司 | A kind of distribution local oscillator Terahertz superhet array acceptor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110190864A (en) * | 2019-07-04 | 2019-08-30 | 苏州特拉芯光电技术有限公司 | A kind of distribution local oscillator Terahertz superhet array acceptor |
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