CN108896965A - 200GHz frequency band signals receive and dispatch measuring system - Google Patents

Abstract

The present invention provides a 200GHz frequency band signal transceiving and measuring system, comprising: a frequency source module, configured to provide a first radio frequency signal and a second radio frequency signal, and the first radio frequency signal and the second radio frequency signal are coherent signals; The transmitting front-end module is used to receive the first radio frequency signal and output the third radio frequency signal in the 200GHz frequency band; the transmitting antenna is used to transmit the third radio frequency signal; the receiving antenna is used to receive the third radio frequency signal corresponding to The reflected signal; the receiving front-end module is used to receive the reflected signal and the second radio frequency signal, and output the fourth radio frequency signal with a set frequency, and the set frequency is less than the frequency of the 200GHz frequency band; the intermediate frequency receiving module is used for receiving the fourth radio frequency signal, and outputting an I/Q demodulated signal for analysis of measurement results; wherein, the devices in the transmitting front-end module and the receiving front-end module are implemented based on the principle of solid-state electronics. The invention can realize the measurement of sending and receiving in the 200GHz frequency band based on solid-state electronics.

Description

200GHz frequency band signal transceiver measurement system

technical field

The invention relates to the technical field of electromagnetic radiation and scattering characteristic measurement of terahertz frequency band radar targets, in particular to a 200 GHz frequency band signal receiving and transmitting measurement system.

Background technique

Compared with microwave and millimeter-wave radars, terahertz frequency radar has advantages: first, the antenna system is easy to realize miniaturization and planarization; second, high spatial resolution; third, wide operating frequency band and high imaging accuracy; fourth, the system Small size, suitable for space platform applications.

In outer space, electromagnetic waves can be transmitted without loss, which can ensure long-distance detection with low power. Moreover, there is an atmospheric propagation window in the terahertz frequency band, which is convenient for improving the anti-interference ability of ground high-power radars. For the field of target recognition, the use of terahertz frequency band radar has a wider operating frequency band than microwave and millimeter wave radars, so the imaging accuracy will be greatly improved. Therefore, how to effectively obtain the scattering data of the target in the terahertz frequency band, extract the distribution of scattering centers reasonably and accurately, and conduct necessary analysis to clarify the scattering mechanism of each scattering center and the interaction between scattering centers is not only for Target modeling and recognition plays an important role, and it is also of great significance to the stealth technology of reducing the radar cross section (Radar Cross Section, RCS) of the target and the radar anti-stealth technology of enhancing the detection ability of RCS.

For the study of the target scattering center, two means of experimental measurement and theoretical calculation can be used to obtain data. Experimental measurements can be used as verification simulations for theoretical calculations, and are even the only tool for targets with extremely complex structures and materials.

However, most foreign research on terahertz frequency band radar transceiver systems is based on vacuum electronics and quasi-optical principles. Domestic research on 200GHz frequency band transceiver radar based on solid-state electronics is based on the vector Instruments such as network analyzers have slow measurement times as frequency sources, and vector network analyzers have too much mass.

Contents of the invention

The present invention provides a 200GHz frequency band signal transmitting and receiving measurement system to solve one or more of the above problems.

An embodiment of the present invention provides a 200GHz frequency band signal transceiver measurement system, including: a frequency source module, used to provide a first radio frequency signal and a second radio frequency signal, the first radio frequency signal and the second radio frequency signal are coherent signal; transmitting front-end module, used to receive the first radio frequency signal, and output the third radio frequency signal in the 200GHz frequency band; transmitting antenna, used to transmit the third radio frequency signal; receiving antenna, used to receive the third radio frequency signal A reflected signal corresponding to the signal; a receiving front-end module, configured to receive the reflected signal and the second radio frequency signal, and output a fourth radio frequency signal with a set frequency, the set frequency being less than the frequency of the 200GHz frequency band; an intermediate frequency A receiving module, configured to receive the fourth radio frequency signal, and output an I/Q demodulated signal for analysis of measurement results; wherein, the devices in the transmitting front-end module and the receiving front-end module are based on the principle of solid-state electronics accomplish.

The 200GHz frequency band signal transceiver and measurement system of the embodiment of the present invention can realize a system with only the 200GHz frequency band signal transceiver and measurement function through the frequency source module, the transmitting front-end module, the transmitting antenna, the receiving antenna, the receiving front-end module and the intermediate frequency receiving module. Not only can it meet the needs of research on the electromagnetic radiation and scattering characteristics of targets in the 200GHz frequency band, but it can also overcome the problems of complex functions and excessive weight of existing analytical instruments. Moreover, the first radio frequency signal and the second radio frequency signal are coherent signals, and the devices in the transmitting front-end module and the receiving front-end module are implemented based on the principle of solid-state electronics, so that solid-state based The 200GHz frequency band signal transmission and reception measurement based on the principle of electronics fills the gap in the 200GHz frequency band coherent system transmission and reception measurement system based on the principle of solid-state electronics.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work. In the attached picture:

Fig. 1 is the structural representation of the 200GHz frequency band signal transceiver measurement system of an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a frequency source module in an embodiment of the present invention;

3 is a schematic structural diagram of a transmitting front-end module in an embodiment of the present invention;

4 is a schematic structural diagram of a receiving front-end module in an embodiment of the present invention;

5 is a schematic structural diagram of an intermediate frequency receiving module in an embodiment of the present invention;

FIG. 6 and FIG. 7 are respectively a schematic side view and a schematic top view of the transmitting antenna in an embodiment of the present invention;

FIG. 8 and FIG. 9 are respectively a schematic side view and a schematic top view of a receiving antenna according to an embodiment of the present invention;

Figure 10 to Figure 12 are schematic diagrams of the performance data of the PA3-110 chip;

Figure 13 is a schematic diagram of the performance data of the CHA1008-99F chip;

Figure 14 and Figure 15 are schematic structural diagrams of the 3mm power amplifier at the transmitting end based on the CHA1008-99F chip.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

Aiming at the necessity of the research on the electromagnetic radiation and scattering characteristics of the target in the 200GHz frequency band and the research blank of the coherent transceiver system in the 200GHz frequency band based on the principle of solid-state electronics, the present invention provides a transceiver measurement system for signals in the 200GHz frequency band based on the principle of solid-state electronics .

FIG. 1 is a schematic structural diagram of a 200 GHz frequency band signal transmitting and receiving measurement system according to an embodiment of the present invention. As shown in FIG. 1 , the 200GHz frequency band signal transceiver measurement system may include: a frequency source module 100 , a transmitting front-end module 200 , a transmitting antenna 300 , a receiving antenna 400 , a receiving front-end module 500 and an intermediate frequency receiving module 600 .

The frequency source module 100 is configured to provide a first radio frequency signal and a second radio frequency signal, where the first radio frequency signal and the second radio frequency signal are coherent signals. The frequency range of the first radio frequency signal is, for example, 12.5 Hz˜13.125 Hz, and the frequency range of the second radio frequency signal is, for example, 12.25 Hz˜12.875 Hz. The first radio frequency signal and the second radio frequency signal are coherent signals (coherent), which can be realized by using a power divider, for example.

The transmitting front-end module 200 is connected with the frequency source module 100 and configured to receive the first radio frequency signal and output a third radio frequency signal in the 200 GHz frequency band. The 200 GHz frequency band is a frequency band around 200 GHz, may be a frequency band including 200 GHz, specifically, may be 200 GHz˜210 GHz.

The transmitting antenna 300 is connected to the transmitting front-end module 200 and used for transmitting the third radio frequency signal.

The receiving antenna 400 is configured to receive a reflected signal corresponding to the third radio frequency signal. The reflected signal may have the same frequency as the third radio frequency signal, for example, the frequency range is 200GHz˜210GHz. The reflected signal may be a signal reflected by the measurement target after the third radio frequency signal reaches the measurement target, so that measurement of the measurement target, radar imaging and the like can be realized.

The receiving front-end module 500 is connected to the receiving antenna 400 and the frequency source module 100 respectively, and is used to receive the reflected signal and the second radio frequency signal, and output a fourth radio frequency signal with a set frequency. The fixed frequency is less than the frequency of the 200GHz frequency band. The set frequency can be different according to the mixer in the receiving front-end module 500 , for example, it can be 4GHz. The second radio frequency signal may be input into the receiving front-end module 500 as a local oscillator signal. The receiving front-end module 500 may output the fourth radio frequency signal after mixing the reflected signal and the second radio frequency signal.

The intermediate frequency receiving module 600 is connected with the receiving front-end module 500 and is used for receiving the fourth radio frequency signal and outputting an I/Q demodulated signal for analysis of measurement results. The I/Q demodulated signal may include a DC I signal and a DC Q signal. The I/Q demodulated signal can be further subjected to baseband sampling processing, and collected to analyze measurement results of measurement targets, such as ranging, radar imaging, and the like.

Wherein, the devices in the transmitting front-end module 200 and the receiving front-end module 500 are realized based on the principle of solid-state electronics. The transmitting front-end module and the receiving front-end module may include, for example, devices such as amplifiers, filters, frequency multipliers, etc., and these devices are implemented based on the principle of solid-state electronics. The transceiver measurement system based on solid-state electronics is fundamentally different from that based on vacuum electronics and quasi-optical principles in terms of device selection and implementation.

In this embodiment, by setting the frequency source module, transmitting front-end module, transmitting antenna, receiving antenna, receiving front-end module and intermediate frequency receiving module, it is possible to realize a system that only has the function of transmitting and receiving signals in the 200GHz frequency band, and can not only meet the target for the 200GHz frequency band It meets the needs of research on electromagnetic radiation and scattering characteristics, and can overcome the problems of complex functions and excessive weight of existing analytical instruments. Moreover, the first radio frequency signal and the second radio frequency signal are coherent signals, and the devices in the transmitting front-end module and the receiving front-end module are implemented based on the principle of solid-state electronics, so that solid-state based The 200GHz frequency band signal transmission and reception measurement based on the principle of electronics fills the gap in the 200GHz frequency band coherent system transmission and reception measurement system based on the principle of solid-state electronics.

In some embodiments, the system parameters of the 200GHz frequency band signal transceiving measurement system may include one or more of the following parameters:

The transmitting and receiving measuring system of the 200 GHz frequency band signal in this embodiment is realized based on the principle of solid-state electronics. In the frequency source module 100, by properly selecting the device type, the stepped frequency coherent system can be adopted, and it has a light-weight body and a wider The relative bandwidth, and the pulse repetition period is short.

Fig. 2 is a schematic structural diagram of a frequency source module in an embodiment of the present invention. As shown in Figure 2, the frequency source module 100 may include: a first phase-locked loop 110, a second phase-locked loop 120, a third phase-locked loop 130, a power divider 140, a first mixer 150 and the second mixer 160 .

The first phase-locked loop 110 , the second phase-locked loop 120 and the third phase-locked loop 130 are used to generate a first local oscillator signal, a second local oscillator signal and an initial radio frequency signal respectively. The first local oscillator signal may be a signal of a frequency, for example, a signal of 10.5 GHz. The second local oscillator signal may be a signal of a frequency, for example, a signal of 10.25 GHz. The initial radio frequency signal may be a signal in a frequency band, for example, a signal in a frequency range of 2-2.625 GHz. In an embodiment, in the phase-locked loop, an oscillator can be used to generate a reference signal, and then frequency synthesis can be performed through a phase detector, a low-pass filter and a voltage-controlled oscillator.

The power divider 140 is connected to the third phase-locked loop 130 and configured to divide the initial radio frequency signal into a first radio frequency signal and a second radio frequency signal. The frequency of the first radio frequency signal and the frequency of the second radio frequency signal may be completely the same, and may be consistent with the frequency of the initial radio frequency signal. The first radio frequency signal and the second radio frequency signal are obtained from the same initial radio frequency signal, so the first radio frequency signal and the second radio frequency signal are easily coherent signals. For example, the initial radio frequency signal is a signal with a frequency range of 2 GHz-2.625 GHz, and the first radio frequency signal and the second radio frequency signal obtained through the power divider 140 may both be signals of 2 GHz-2.625 GHz. In an embodiment, the parameters of the first radio frequency signal and the second radio frequency signal may be, for example: the frequency range is 2GHz-2.625GHz; the frequency step is 0.5MHz; the phase noise is 95dBc/Hz@1kHz (at 1kHz The phase noise is 95dBc/Hz); the spurious is -70dBc; the output power is 10dBm.

The first mixer 150 is connected to the first phase-locked loop 110 and the power divider 140 respectively, and is used to mix the first radio frequency signal and the first local oscillator signal, and output the a first radio frequency signal. For example, the first radio frequency signal may be filtered by a loop filter and then transmitted from the frequency source module 100 to the transmitting front-end module 200 through a radio frequency cable. In an embodiment, the parameters of the first radio frequency signal transmitted to the transmitting front-end module 200 may be, for example: the frequency range is 12.5Hz-13.125Hz; the frequency step is 0.5MHz; the phase noise is 95dBc/Hz@1kHz; the spurious is - 70dBc; output power is 10dBm.

The second mixer 160 is connected to the second phase-locked loop 120 and the power divider 140 respectively, and is used to mix the second radio frequency signal and the second local oscillator signal, and output the second radio frequency signal. For example, the second radio frequency signal may be filtered by a loop filter and then transmitted from the frequency source module 100 to the receiving front-end module 500 through a radio frequency cable. In an embodiment, the parameters of the second radio frequency signal transmitted to the receiving front-end module 500 may be, for example: the frequency range is 12.25Hz-12.875Hz; the frequency step is 0.5MHz; the phase noise is 95dBc/Hz@1kHz; the spurious is - 70dBc; output power is 10dBm.

In this embodiment, the output of the first radio frequency signal and the second radio frequency signal can be realized based on a power divider, and the first radio frequency signal and the second radio frequency signal can be easily made to be coherent signals.

In some embodiments, in the frequency source module 100, the digital frequency generator of 2-2.625 GHz is divided into two signals after passing through a power divider, and mixed with 10.5 GHz and 10.25 GHz local oscillator signals respectively to generate 12.5-13.125 GHz and Two channels of radio frequency signals of 12.25-12.875 GHz are output to the transmitting front-end module 200 and the receiving front-end module 500 respectively, and ensure that the sending and receiving signals are coherent.

In some embodiments, the parameters of the first radio frequency signal (transmission step frequency signal source) output by the frequency source module 100 can be as follows:

In some embodiments, the parameters of the second radio frequency signal (receiving the local oscillator step frequency signal source) output by the frequency source module 100 can be as follows:

In the embodiment, the step frequency of 8 MHz and the number of frequency hopping points of 1250 can determine the distance resolution of the target measurement of the transceiver measurement system, and the distance resolution calculation formula can be: ΔR=C/(2N·Δf), where C represents the speed of light, N represents the number of frequency hopping points, and Δf represents the stepping frequency.

In some embodiments, the parameters of the initial radio frequency signal (quadrature demodulation local oscillator phase-locked frequency source) output in the frequency source module 100 can be as follows:

Frequency range: 4GHz

Spurious: <-70dBc

Output frequency reference signal power: ≥5dBm.

Fig. 3 is a schematic structural diagram of a transmitting front-end module in an embodiment of the present invention. As shown in FIG. 3 , the transmitting front-end module 200 may include: a first frequency multiplication link. The first frequency multiplication link may include a first double frequency 201, a second double frequency 202, a third double frequency 203, and a fourth double frequency 204 connected in sequence, for converting the first radio frequency signal The frequency increases to the 200GHz band. The connections among the first double frequency 201 , the second double frequency 202 , the third double frequency 203 and the fourth double frequency 204 can be direct connection or indirect connection. The first radio frequency signal is, for example, a signal with a frequency range of 12.5 Hz to 13.125 Hz. After the first double frequency 201, the frequency of the output signal is 25 Hz to 26.25 Hz. After the second double frequency 202, the frequency of the output signal is The frequency is 50Hz-52.5Hz, and after the third double frequency 203, the frequency of the output signal is 100Hz-105Hz, and after the fourth double frequency 204, the frequency of the output signal is 200Hz-210Hz. In this embodiment, the frequency of the first radio frequency signal can be increased to a required frequency through four frequency doublings. The first double frequency 201, for example, can be realized based on the HMC576 chip, the second double frequency 202, for example, can be realized based on the CHX2192 chip, the fourth double frequency 204 can be realized, for example, based on the FARRAN chip, and the chip model adopted by the third double frequency 203 You can choose according to your needs.

As shown in FIG. 3 , the transmitting front-end module 200 may further include: a third amplifier 210 . The third amplifier 210 is connected between the third doubled frequency 203 and the fourth doubled frequency 204, and is used for amplifying the power of the first radio frequency signal. The third amplifier 203 may be implemented based on the CHA1008-99F chip. In this embodiment, the power of the first radio frequency signal can be increased to the required power through the third amplifier 210, and the third amplifier 210 is arranged at the position close to the output end of the transmitting front-end module 200 (connected to the third two between the double frequency 203 and the fourth double frequency 204 ), which can reduce the loss of signal transmission in the transmitting front-end module 200 . Among them, the reason why the CHA1008-99F chip is chosen to implement the third amplifier 203 is that the inventor has learned through creative work and breaking through the limitations of the performance parameters provided by the CHA1008-99F chip manual for those skilled in the art. , the process of specific creative work will be explained in the follow-up content.

As shown in FIG. 3 , the transmitting front-end module 200 may further include: a first filter 205 , a first amplifier 206 , a second filter 207 , a second amplifier 208 and a third filter 209 . The first amplifier 206 and the second amplifier 208 may be integrated operational amplifiers.

The first filter 205 and the first amplifier 206 are connected between the first double frequency 201 and the second double frequency 202, and are used to filter the output signal of the first double frequency 201 respectively and signal amplification. The first filter 205 and the first amplifier 206 may be connected to each other, for example, the first filter 205 and the first amplifier 206 are respectively connected to the first double frequency 201 and the second double frequency 202 . According to different specific device types of the first filter 205 and the first amplifier 206 , the connection positions can be interchanged.

The second filter 207 and the second amplifier 208 are connected between the second double frequency 202 and the third double frequency 203, and are used to filter the output signal of the second double frequency 202 respectively and signal amplification. The second filter 207 and the second amplifier 208 may be connected to each other, for example, the second filter 207 and the second amplifier 208 may be connected to the second double frequency 202 and the third double frequency 203 respectively. According to different specific device types of the second filter 207 and the second amplifier 208 , the connection positions can be interchanged.

The third filter 209 is connected between the third double frequency 203 and the fourth double frequency 204 for filtering the output signal of the third double frequency 203 . The third filter 209 may be connected to the third amplifier 210, for example, the third filter 209 and the third amplifier 210 may be connected to the third double frequency 203 and the fourth double frequency 204 respectively. According to different specific component types of the third filter 209 and the above-mentioned third amplifier 210 , the connection positions can be interchanged.

In some embodiments, the transmitting front-end module 200 receives the 12.5-13.125 GHz radio frequency signal output by the frequency source module 100, and outputs a 200-210 GHz radio frequency signal through the frequency multiplication link of four frequency doublers and passes through a high-gain, low-sidelobe The transmitting antenna radiates directionally into space.

In some embodiments, the parameters of the transmitting front-end module 200 may be as follows:

Fig. 4 is a schematic structural diagram of a receiving front-end module in an embodiment of the present invention. As shown in FIG. 4 , the receiving front-end module 500 may include: a second frequency multiplication link. The second frequency doubling link may include a fifth doubling frequency 501 , a sixth doubling frequency 502 and a seventh doubling frequency 503 connected in sequence, for performing frequency doubling processing on the second radio frequency signal. The connection between the fifth double frequency 501 , the sixth double frequency 502 and the seventh double frequency 503 can be directly connected or indirectly connected. The second radio frequency signal (local oscillator signal) is, for example, a signal with a frequency range of 12.25 Hz to 12.875 Hz. After the fifth double frequency 501, the frequency of the output signal is 24.5 Hz to 25.75 Hz, and then after the sixth double frequency After 502, the frequency of the output signal is 49Hz-51.5Hz, and after the seventh double frequency 503, the frequency of the output signal is 98Hz-103Hz. In this embodiment, the frequency of the second radio frequency signal can be increased to a required frequency through three frequency doublings. The fifth frequency doubling 501 can be implemented based on the HMC576 chip, for example, the sixth frequency doubling 502 can be realized based on the CHX2192 chip, and the chip model used in the seventh doubling frequency 503 can be selected according to needs.

As shown in FIG. 4 again, the receiving front-end module 500 may further include: a sixth amplifier 509 . The sixth amplifier 509 is connected to the seventh double frequency 503 and is used for amplifying the power of the output signal of the seventh double frequency 503; the sixth amplifier 509 is realized based on the CHA1008-99F chip. In this embodiment, the power of the second radio frequency signal can be increased to the required power by the sixth amplifier 509, and the sixth amplifier 509 is arranged at the position close to the output end of the receiving front-end module 500 (twice as much as the seventh frequency 503 connection), which can reduce the loss of signal transmission in the receiving front-end module 500. Among them, the reason why the CHA1008-99F chip is chosen to implement the sixth amplifier 509 is that the inventor has learned through creative work and breaking through the limitations of the performance parameters provided by the CHA1008-99F chip manual for those skilled in the art. The process of creative labor will be explained in the following content.

As shown in Figure 4 again, the receiving front-end module 500 may also include: a fourth filter 504, a fourth amplifier 505, a fifth filter 506, a fifth amplifier 507, a sixth filter 508 and a third frequency mixer device 510. The fourth amplifier 505 and the fifth amplifier 507 may be integrated operational amplifiers.

The fourth filter 504 and the fourth amplifier 505 are connected between the fifth double frequency 501 and the sixth double frequency 502 for filtering and summing the output signal of the fifth double frequency 501 Signal amplification. The fourth filter 504 and the fourth amplifier 505 may be connected to each other, for example, the fourth filter 504 and the fourth amplifier 505 are respectively connected to the fifth double frequency 501 and the sixth double frequency 502 . According to the specific device selection of the fourth filter 504 and the fourth amplifier 505, the connection positions can be interchanged.

The fifth filter 506 and the fifth amplifier 507 are connected between the sixth double frequency 502 and the seventh double frequency 503 for filtering and summing the output signal of the sixth double frequency 502 Signal amplification. The fifth filter 506 and the fifth amplifier 507 may be connected to each other. For example, the fifth filter 506 and the fifth amplifier 507 may be connected to the sixth double frequency 502 and the seventh double frequency 503, respectively. According to the specific device selection of the fifth filter 506 and the fifth amplifier 507, the connection positions can be interchanged.

The sixth filter 508 is connected to the seventh double frequency 503 and configured to filter the output signal of the seventh double frequency 503 . The sixth filter 508 may be connected to a sixth amplifier 509 . The sixth filter 508 and the sixth amplifier 509 can be connected between the seventh double frequency multiplier 503 and the third mixer 510. According to the specific device selection of the sixth filter 508 and the sixth amplifier 509, the connection The positions are interchangeable.

The third mixer 510 is configured to receive the reflected signal and the output signal of the seventh double frequency 503 after filtering and power amplifying, and output the fourth radio frequency signal. The third mixer 510 may be directly connected to the sixth amplifier 509 and may be indirectly connected to the sixth filter 508 .

In some embodiments, the receiving front-end module 500 receives the 200GHz-210GHz radio frequency signal reflected back from the space, and outputs a 4GHz radio frequency signal through a harmonic mixer. The local oscillator signal of the receiving front end comes from another 12.25-12.875 GHz radio frequency signal output by the frequency source module 100, and outputs a 98-103 GHz radio frequency signal through the frequency multiplication link of three frequency doublers. Within the frequency range of the 200GHz frequency band (for example, 200GHz to 210GHz), a single frequency point test or a frequency hopping test can be performed.

In some embodiments, the parameters of the receiving front-end module 500 may be as follows:

Fig. 5 is a schematic structural diagram of an intermediate frequency receiving module in an embodiment of the present invention. As shown in FIG. 5 , the intermediate frequency receiving module 600 may include: a fourth mixer 601 and an I/Q demodulator 602 .

The fourth mixer 601 is configured to receive the fourth radio frequency signal and a third local oscillator signal, and output a fifth radio frequency signal of 100 MHz. The fourth radio frequency signal may be a 4GHz intermediate frequency signal, and the frequency input to the fourth mixer 601 may not change, that is, it is still a 4GHz intermediate frequency signal. The third local oscillator signal may be generated by a phase-locked loop PLL and amplified by the amplifier 612 to generate an output, for example, it may be a 3.9 GHz radio frequency signal. The 4GHz intermediate frequency signal and the 3.9GHz radio frequency signal can output a fifth radio frequency signal through the fourth mixer 601, for example, 100MHz can be output. The fourth mixer 601 can be implemented based on the HMC128 chip, for example.

The I/Q demodulator 602 is connected to the fourth mixer 601 and configured to receive the fifth radio frequency signal and output the I/Q demodulated signal. The fifth radio frequency signal can be input to the I/Q demodulator 602 together with a given demodulation signal (for example, 100 MHz), and then output the I/Q demodulation signal. The I/Q demodulated signal includes a DC I signal and a DC Q signal. Further, the I/Q demodulated signal can be linearly amplified for collection and analysis of measurement results. The chip type used by the I/Q demodulator 602 can be selected as required.

Again as shown in Fig. 5, described intermediate frequency receiving module 600 can also comprise: filter 603, amplifier 604, numerical control attenuator 605, amplifier 606, numerical control attenuator 607, amplifier 608, amplifier 609, the first linear amplifier 610 and the second Linear amplifier 620. Amplifier 604, amplifier 606, amplifier 608, and amplifier 609 may be integrated operational amplifiers, which may perform signal amplification on signals.

In some embodiments, the intermediate frequency receiving module 600 amplifies the 4GHz signal output by the receiving front-end module, mixes with the 3.9GHz local oscillator signal to output a 100MHz signal, and then demodulates the output 100MHz signal with the 100MHz to output DC I and Q signals and performs Linear amplification for acquisition. The signal acquisition can be a 100kHz multi-channel acquisition card, which converts I and Q signals into digital signals.

In some embodiments, the parameters of the intermediate frequency receiving module 600 can be as follows:

In some embodiments, the waveguides in the transmitting antenna 300 and the receiving antenna 400 are both WR4 waveguides. The applicable frequency range of WR4 waveguide is 170GHz-260GHz, which can meet the frequency band requirements of the transceiver measurement system. The waveguide may refer to a waveguide located at one end port of the transmitting antenna 300 and the receiving antenna 400 . FIG. 6 and FIG. 7 are respectively a schematic side view and a schematic top view of the transmitting antenna in an embodiment of the present invention. The size and shape of the transmitting antenna 300 may be as shown in FIGS. 6 and 7 . In addition, the parameters of the transmitting antenna 300 may include: WR4: 1.0922*0.5461mm; gain: 23.06dBi (center frequency); full-band standing wave: ≤1.1; sidelobe level: -17.5dB; 3dB lobe width: 14° . FIG. 8 and FIG. 9 are respectively a schematic side view and a schematic top view of a receiving antenna according to an embodiment of the present invention. The size and shape of the receiving antenna 400 may be as shown in FIGS. 8 and 9 . In addition, the parameters of the receiving antenna 400 may include: WR4: 1.0922*0.5461mm; gain: 25.1dBi (center frequency); full-band standing wave: ≤1.1; sidelobe level: -22dB; 3dB lobe width: 12°.

In some embodiments, the transmitting antenna 300 and the receiving antenna 400 may adopt high-gain and low-sidelobe antennas. The technical indicators of the transmitting antenna 300 and the receiving antenna 400 can be as follows:

The present invention will be illustrated with a specific embodiment below:

The 200GHz frequency band signal transceiver measurement system includes the following parts:

System launch front end;

System receiving front end;

System chassis, including system frequency source part and intermediate frequency receiving part;

System RF cables;

Transmitting and receiving antennas;

PCI acquisition card and system control frequency hopping acquisition software.

(1) The 200GHz frequency band signal transceiver measurement system adopts the step frequency system, and the parameters are as follows:

(2) The technical indicators of the launch front end are as follows:

The transmitting front-end receives the 12.5-13.125GHz radio frequency signal output by the control system, outputs the 200-210GHz radio frequency signal through the frequency multiplication link of 4 frequency doublers, and radiates to the space through the high-gain, low-side lobe antenna. The functional block diagram can be shown in Figure 3.

(3) The technical indicators of the receiving front end are as follows:

The receiving front end receives the 200-210GHz radio frequency signal reflected from the space, and outputs a 4GHz radio frequency signal through the harmonic mixer. The local oscillator signal of the receiving front end comes from another 12.25-12.875GHz radio frequency signal output by the control system, and outputs a 98-103GHz radio frequency signal through the frequency multiplication link of three frequency doublers. The principle block diagram is shown in Figure 4.

(4) The technical indicators of the frequency source are as follows:

In the frequency source part, the 2-2.625GHz digital frequency generator is mixed with the 10.5GHz and 10.25GHz local oscillator signals respectively after passing through the power divider to generate two RF signals of 12.5-13.125GHz and 12.25-12.875GHz, which are respectively output To the transmitting front end and the receiving front end, and ensure that the sending and receiving signals are coherent. The principle block diagram is shown in Figure 2.

——Transmit step frequency signal source

——Receive local oscillator step frequency signal source

——Quadrature demodulation local oscillator phase-locked frequency source

(5) The technical indicators of the intermediate frequency receiving part are as follows:

The intermediate frequency receiver amplifies the 4GHz signal output by the receiving front end, mixes it with the 3.9GHz local oscillator signal to output a 100MHz signal, and then demodulates it with 100MHz to output DC I, Q signals and linearly amplifies them for collection. The signal acquisition is a 100kHz multi-channel acquisition card, which converts I and Q signals into digital signals. The principle block diagram is shown in Figure 5.

(5) The technical specifications of the transmitting antenna and receiving antenna are as follows:

The horn antenna with high gain and low side lobe is adopted, and the technical indicators are shown in Figure 6 to Figure 9.

In some embodiments, the size of the transmitting front end of the 200GHz frequency band transceiver system is 239mm×100mm×58.8mm, and the mass is 2.047kg; the size of the receiving front end of the system is 160.1mm×80mm×80mm, and the mass is 0.945kg; It is 7.95kg.

In the above embodiment, the reason why the third amplifier 210 and the sixth amplifier 509 can be based on the CHA1008-99F chip is that the inventor has done creative work, and the analysis is as follows:

As shown in FIG. 3 , the final stage amplifier (the third amplifier 210) of the transmitting front-end module 200 amplifies the 100GHz～105GHz signal, and the signal power needs to reach about +14dBm to meet the requirements of the double frequency doubler (the fourth stage) of the FARRAN company. The typical input power requirement of double frequency 204 ), so as to ensure that a 200GHz-210GHz signal can be obtained at the output end of the transmitting front-end module 200 and the power is greater than 10mW. As shown in Figure 4, the final amplifier of the receiving front-end module 500 amplifies the power of the 98-103GHz signal to +10dBm, in order to meet the requirements of the subsequent FARRAN harmonic mixer (the third mixer 510) for driving the local oscillator .

Therefore, in the 98-105GHz frequency band, a power amplifier needs to be specially designed to ensure that it can output +10-+15dBm power when receiving -20dBm input power.

There are two types of power amplifier chips with working frequency up to 105GHz, namely PA3-110 chip of HRL company and CHA1008-99F chip of UMS company. The data of the PA3-110 chip is shown in Figure 10, Figure 11 and Figure 12, and the data of the CHA1008-99F chip is shown in Figure 13. From the data of the two chips, it can be seen that the saturated output of the PA3-110 chip The power reaches 13dBm, the gain is about 13dB, while the output 1dB compression point power of the CHA1008-99F chip is +5dBm, the gain is about 16dBm, and its data sheet does not give a saturated output power value. Due to the high requirement for output power, according to the published chip performance information, those skilled in the art usually tend to choose the PA3-110 die instead of the CHA1008-99F chip.

However, in the actual test process, the inventor found that the gain and output power of the PA3-110 chip dropped very seriously at 105GHz, and the measured saturated output power was about +3dBm (at 105GHz), which was far from reaching the requirements of the present invention. It is easy to generate self-excitation in the process, resulting in abnormal working status. Moreover, in response to the above-mentioned problems, even if adjustments and debugging are made from various aspects, including cavity optimization design, addition of 96-110GHz bandpass filters, microstrip line impedance matching debugging, chip micro-assembly technology optimization, and DC power supply optimization, also could not be resolved.

In this case, the inventor tested the CHA1008-99F chip, and the test results are shown in Table 1 and Table 2.

Frequency (GHz) 96 97 98 99 100 101 102 103 104 105 106 Input power(dBm) -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 -20 Output power(dBm) -4.8 -4.7 -5 -5 -5 -5.2 -5.2 -5.5 -5.1 -5.1 -5.3 Gain(dB) 15.2 15.3 15 15 15 14.8 14.8 14.5 14.9 14.9 14.7

Table 1 Small signal test results of CHA1008-99F chip

Frequency (GHz) 96 97 98 99 100 101 102 103 104 105 106 Input power(dBm) -4 -4 -4 -4 -4 -4 -4 -4 -4 -4 -4 Output power(dBm) 10.2 10.5 10 10 10.3 10.2 10.1 9.8 9.8 9.6 9.7 Gain(dB) 14.2 14.5 14 14 14.3 14.2 14.1 13.8 13.8 13.6 13.7

Table 2 Large signal test results of CHA1008-99F chip

According to the initial test results of the CHA1008-99F chip, the inventors found that the measured small signal gain is about 15dB, and when the gain is compressed by 2dB, the output power can reach 10dBm, which is much higher than the output 1dB compression given in the data sheet point. Based on this discovery, in the embodiment, the receiving end 3mm power amplifier (and the sixth amplifier 509 ) designed based on the CHA1008-99F chip can be shown in FIG. 14 and FIG. 15 . As shown in Figure 14, the 3mm frequency band signal generated after multiple times of frequency doubling, filtering, and amplification is amplified by the first-stage amplifier of the CHA1008-99F chip, and then the power is distributed through the four-way splitter. After the four CHA1008-99F chips perform secondary amplification, a 3mm output signal of +15dBm is obtained through power synthesis, which can promote FARRAN double frequency work. As shown in Figure 15, the 3mm frequency band signal generated after multiple times of frequency doubling, filtering, and amplification is directly amplified twice through the CHA1008-99F chip, and a 3mm receiving local oscillator signal that meets the requirements can be obtained, which can promote FARRAN harmonic mixer at work. Test the 3mm power amplifier at the receiving end shown in Figure 14 and Figure 15, and the test results are shown in Table 3. It can be seen from Table 3 that the power amplifier designed based on the CHA1008-99F chip can meet the power requirements in the transceiver measurement system. Similarly, the 3mm power amplifier at the transmitting end (the third amplifier 210) can be designed based on the CHA1008-99F chip. When the power requirements of the receiving end and the transmitting end are consistent, the design of the 3mm power amplifier at the transmitting end can be the same as that of the 3mm power amplifier at the receiving end. As shown in Figure 14 and Figure 15, the test results of the 3mm power amplifier at the transmitting end designed in this way can be shown in Table 3.

Frequency (GHz) 96 97 98 99 100 101 102 103 104 105 106 Input power(dBm) -15 -15 -15 -15 -15 -15 -15 -15 -15 -15 -15 Output power(dBm) 11.3 12.1 12 11 11.2 10.9 10.8 11 10.7 10.9 10.9

Table 3 Preliminary test results of the 3mm power amplifier at the receiving end

The use steps of the 200GHz frequency band transceiver measurement system of an embodiment:

1. Before using the 200GHz frequency band transceiver measurement system of the above-mentioned embodiment to carry out target measurement, each part in the system can be tested respectively, and the specific process is as follows:

(1) Receive front-end input local oscillator signal test

Technical index requirements:

Output frequency (to the fifth double frequency 501): 12.25～12.875GHz;

Output power (to the fifth double frequency 501): 12±1dBm;

Stray: ≤-60dBc;

Phase noise: ≤-85dBc/Hz@1kHz.

Test steps: The frequency source module uses the signal source to input the 4GHz signal of the local oscillator, and the spectrum analyzer is connected to the frequency source to output to the receiving front-end part, and the corresponding output power, spurious and phase noise of the output frequency point are monitored, and the test results need to meet the requirements of technical indicators .

(2) Test the RF signal output by the transmitting front end

Technical index requirements:

Output frequency (to the fourth double frequency 204): 12.5 ~ 13.125GHz;

Output power (to the fourth double frequency 204): 12±1dBm;

Stray: ≤-60dBc;

Phase noise: ≤-85dBc/Hz@1kHz.

Test steps: The frequency source module uses the signal source to input 4GHz signals, the spectrum analyzer is connected to the frequency source to output to the front-end part of the transmitter, and the corresponding output power, spurious and phase noise of the output frequency point are monitored. The test results need to meet the requirements of technical indicators.

(3) Test the output power of the receiving front-end 3mm module (to the third mixer 510)

Technical index requirements:

The output of the receiving front-end 3mm module is used as the local oscillator of the 200GHz harmonic mixer. According to the requirements of the harmonic mixer product manual, the local oscillator power should be within the range of 8-10dBm, not greater than 12dBm.

Test steps: The frequency source module part uses the signal source to input 12.25-12.875GHz signal, the power is 12±1dBm, the power meter is connected to the part of the receiving front-end outputting 98-103GHz signal, and the corresponding output power of the monitoring output frequency point needs to meet the technical index requirements.

(4) Test the output power of the 3mm module at the front end of the transmitter (to the fourth double frequency 204)

Technical index requirements:

The output of the 3mm module at the front end of the transmitter is used as the driving signal of the 200GHz frequency multiplier. According to the requirements of the frequency multiplier product manual, the driving power should not be less than 14dBm.

Test steps: The frequency source module part uses the signal source to input 12.5~13.125GHz signal, the power is 12±1dBm (±1 means the fluctuation range is 1, for example, the power range is 11dBm~13dBm), and the power meter is connected to the receiving front end to output 100~ For the part of the 105GHz signal, the corresponding output power of the monitoring output frequency must meet the requirements of the technical indicators.

(5) IF module gain and attenuation test

Technical index requirements:

The design requirement for the maximum gain of the IF module is not less than 60dB, and the design requirement for the maximum attenuation of the IF module is not less than 60dB, with a step of 1dB.

Test steps: connect the 4GHz local oscillator signal to the intermediate frequency module of the system, connect the spectrum analyzer to the rear end of the mixer module, and monitor the maximum gain, The maximum attenuation and step size need to meet the technical specification requirements.

(6) IQ demodulation module technical index test

Technical index requirements:

The design requirement of the IQ demodulation module is to output I and Q two-way DC signals under the condition that the radio frequency signal is 100MHz, the power is 10dBm and the local oscillator signal is 100MHz, and the power is 0dBm. The level is not less than ±1V (guaranteed by the DC amplifier).

Test steps: Connect the radio frequency signal and local oscillator signal 100MHz to the IQ demodulation module of the system. The power must meet the requirements of the technical indicators. The oscilloscope is connected to the output IQ signal part to detect the output signal amplitude and orthogonality.

2. Before using the 200GHz frequency band transceiver measurement system of the above-mentioned embodiment to perform target measurement, the system can be installed and tested, and the process is as follows:

After the above-mentioned key components are tested and passed, the system test is carried out.

(1) Use three radio frequency cables to connect the receiving, transmitting and local oscillator parts of the transceiver module and the chassis.

(2) Use the J30J21ZKP interface cable to connect with the RS485 to USB cable, the J30J21ZKP interface cable is connected to the control acquisition part of the chassis, and the USB is connected to the computer USB port.

(3) Use the J1 connector of the acquisition card to connect to two SMA coaxial cables, the coaxial cables are connected to the I/Q demodulation signal of the chassis for collecting I/Q output signals, and the J1 connector is connected to the PCI acquisition card.

(4) Use the J30J9ZKP interface cable to connect the transceiver module and the host to supply power to the transmitter module and the receiver module.

(5) Place the transceiver antenna at a distance of 1.5m, and measure the S21 signal amplitude when the main lobe of the antenna is not aligned. It is necessary to ensure that the IQ signal collected during the frequency sweep is greater than ±4V.

3. Use the 200GHz frequency band transceiver measurement system of the above-mentioned embodiment to carry out the target imaging test, the process is as follows:

(1) Connect the transceiver module and the control chassis, and ensure that the transceiver antennas are strictly placed in the same polarization form, connect the control chassis and the computer, and initialize the parameters of the control module;

(2) Initialize the turntable, adjust the turntable to the initial position, or select a suitable position as the initial position;

(3) Perform frequency sweep test on the background, measure and obtain the background S21 data, and save the background data;

(4) Under the condition that the test environment remains unchanged, place the calibration ball in the center of the turntable, perform a frequency sweep test on the calibration ball, and obtain the S21 data of the calibration ball;

(5) Under the condition that other conditions remain unchanged, replace the calibration ball with the target to be measured and place it in the center of the turntable;

(6) Adjust the turntable to the starting position, and carry out the corner frequency sweep test on the target, that is, every certain corner, the computer collects the S21 data of the target once by controlling the chassis and saves it in the computer;

(7) One-dimensional imaging data processing, a group of data at a certain angle can be selected from the target corner frequency sweep test data for one-dimensional imaging processing, and one-dimensional graphics (the relationship between RCS and distance) can also be displayed Perform frequency sweep test directly without rotation to complete one-dimensional imaging.

In order to solve the lower frequency band of 200 GHz, this embodiment provides a 200 GHz transceiver measurement system based on solid-state electronics. Using this 200GHz frequency band transceiver measurement system can provide an effective and feasible test system for the research of 200GHz frequency band target electromagnetic radiation and scattering characteristics. Through the investigation of the existing terahertz transceiver measurement system, this embodiment proposes a solid-state electronics wideband high-resolution transceiver measurement system based on the principle of stepped frequency radar in the 200 GHz frequency band. Through the design and development of the 200GHz frequency band transceiver measurement system and the one-dimensional distance imaging test, the availability of the system is confirmed. In this way, an effective and feasible test system can be provided for the measurement of electromagnetic radiation and scattering of targets in the terahertz frequency band. The system can cooperate with the compact field measurement system to complete the indoor target electromagnetic scattering simulation measurement, and can also cooperate with the two-dimensional turntable to complete the target ISAR (Inverse Synthetic Aperture Radar, Inverse Synthetic Aperture Radar) two-dimensional scattering center imaging.

The application example of the measurement system of the embodiment of the present invention is as follows:

(1) Imaging system RCS accuracy test

Use a calibration sphere with a diameter of 20cm (RCS=-15dBsm) to determine the RCS of a metal ball with a diameter of 11cm, and compare the RCS of the calibration sphere with a diameter of 11cm obtained from the test with the theoretical value (RCS=-20dBsm).

The experimental results show that the RCS test value of the metal ball with a diameter of 11cm is relatively close to the theory. The RCS value of the metal ball is -18.83dBsm, and the error is about 1dB compared with -20dBsm, which shows that the experimental system is reliable, the imaging algorithm is correct, and the software programming is correct.

However, since the isolation between the transceiver antennas can only be solved by adjusting the distance and angle between the transceiver antennas, it is normal for the error to be within 1dB.

(2) Longitudinal resolution test of system one-dimensional imaging

The actual resolution achievable by the system was tested using two trihedral reflectors. The experiment was carried out twice, and the front and rear distances of the two corner reflectors were 4cm and 6cm, respectively.

The experimental results show that the test system can clearly distinguish the two corner reflectors when the distance between the two corner reflectors is 6cm. In actual measurement, the distinction is not obvious enough when the distance is 4cm.

In summary, the 200GHz frequency band signal transceiver measurement system of the embodiment of the present invention can realize only 200GHz frequency band signal transceiver by setting the frequency source module, transmitting front-end module, transmitting antenna, receiving antenna, receiving front-end module and intermediate frequency receiving module. The system with measurement function can not only meet the needs of research on the electromagnetic radiation and scattering characteristics of targets in the 200GHz frequency band, but also overcome the problems of complex functions and excessive weight of existing analytical instruments. Moreover, the first radio frequency signal and the second radio frequency signal are coherent signals, and the devices in the transmitting front-end module and the receiving front-end module are implemented based on the principle of solid-state electronics, so that solid-state based The 200GHz frequency band signal transceiver measurement based on the principle of electronics fills the gap in the 200GHz frequency band coherent system transceiver measurement system based on the principle of solid-state electronics, and can adopt the step frequency coherent system, which has miniaturization, light weight and wider relative Bandwidth, and the advantages of short pulse repetition period.

In the description of this specification, descriptions referring to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "examples", "specific examples", or "some examples" etc. mean It means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. The sequence of steps involved in each embodiment is used to schematically illustrate the implementation of the present invention, and the sequence of steps therein is not limited and can be appropriately adjusted as required.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. a kind of 200GHz frequency band signals receive and dispatch measuring system, which is characterized in that including：

Frequency source module, for providing the first radiofrequency signal and the second radiofrequency signal, first radiofrequency signal and described second Radiofrequency signal is coherent signal；

Transmitting front-end module is connect with the frequency source module, for receiving first radiofrequency signal, and exports 200GHz frequency The third radiofrequency signal of section；

Transmitting antenna is connect with the transmitting front-end module, for emitting the third radiofrequency signal；

Receiving antenna, for receiving the corresponding reflection signal of the third radiofrequency signal；

Receiving front-end module is connect with the receiving antenna and the frequency source module respectively, for receiving the reflection signal With second radiofrequency signal, and the 4th radiofrequency signal of setpoint frequency is exported, the setpoint frequency is less than the 200GHz frequency The frequency of section；

Medium frequency reception module is connect with the receiving front-end module, for receiving the 4th radiofrequency signal, and exports I/Q solution Signal is adjusted, to measure interpretation of result；

Wherein, the device in the transmitting front-end module and the receiving front-end module is realized based on solidstate electronics principle.

2. 200GHz frequency band signals as described in claim 1 receive and dispatch measuring system, which is characterized in that the frequency source module packet It includes：

First phase-locked loop, the second phase-locked loop and third phase-locked loop, for generating the first local oscillation signal, the second local oscillator respectively Signal and initial radio frequency signal；

Power splitter is connect with the third phase-locked loop, for the initial radio frequency signal to be assigned as first via radiofrequency signal With the second tunnel radiofrequency signal；

First frequency mixer is connect with first phase-locked loop and the power splitter respectively, for believing the first via radio frequency Number and the first local oscillation signal be mixed, export first radiofrequency signal；

Second frequency mixer is connect with second phase-locked loop and the power splitter respectively, for believing second road radio frequency Number and the second local oscillation signal be mixed, export second radiofrequency signal.

3. 200GHz frequency band signals as described in claim 1 receive and dispatch measuring system, which is characterized in that the front end of emission mould Block, including：

First frequency multiplication link, include sequentially connected one or two frequency multiplication, the two or two frequency multiplication, the three or two frequency multiplication and the four or two frequency multiplication, For the frequency of first radiofrequency signal to be increased to the 200GHz frequency range.

4. 200GHz frequency band signals as claimed in claim 3 receive and dispatch measuring system, which is characterized in that the front end of emission mould Block further includes：

Third amplifier is connected between the three or two frequency multiplication and the four or two frequency multiplication, for believing first radio frequency Number carry out power amplification；The third amplifier is realized based on CHA1008-99F chip.

5. 200GHz frequency band signals as claimed in claim 4 receive and dispatch measuring system, which is characterized in that the front end of emission mould Block further includes：

First filter and the first amplifier are connected between the one or two frequency multiplication and the two or two frequency multiplication, are respectively used to The output signal of one or two frequency multiplication is filtered and signal amplifies；

Second filter and the second amplifier are connected between the two or two frequency multiplication and the three or two frequency multiplication, are respectively used to The output signal of two or two frequency multiplication is filtered and signal amplifies；

Third filter is connected between the three or two frequency multiplication and the four or two frequency multiplication, for the three or two frequency multiplication Output signal be filtered.

6. 200GHz frequency band signals as described in claim 1 receive and dispatch measuring system, which is characterized in that the receiving front-end mould Block, including：

Second frequency multiplication link includes sequentially connected five or two frequency multiplication, the six or two frequency multiplication and the seven or two frequency multiplication, for described the Two radiofrequency signals carry out process of frequency multiplication.

7. 200GHz frequency band signals as claimed in claim 6 receive and dispatch measuring system, which is characterized in that the receiving front-end mould Block further includes：

6th amplifier is connect with the seven or two frequency multiplication, is carried out power for the output signal to the seven or two frequency multiplication and is put Greatly；6th amplifier is realized based on CHA1008-99F chip.

8. 200GHz frequency band signals as claimed in claim 7 receive and dispatch measuring system, which is characterized in that the receiving front-end mould Block further includes：

4th filter and the 4th amplifier are connected between the five or two frequency multiplication and the six or two frequency multiplication, for institute The output signal for stating the five or two frequency multiplication is filtered amplifies with signal；

5th filter and the 5th amplifier are connected between the six or two frequency multiplication and the seven or two frequency multiplication, for institute The output signal for stating the six or two frequency multiplication is filtered amplifies with signal；

6th filter is connect with the seven or two frequency multiplication, is filtered for the output signal to the seven or two frequency multiplication；

Third frequency mixer, for receive it is described reflection signal and the seven or two frequency multiplication after filtering and power amplification it is defeated Signal out, and export the 4th radiofrequency signal.

9. 200GHz frequency band signals as described in claim 1 receive and dispatch measuring system, which is characterized in that the medium frequency reception mould Block, including：

4th frequency mixer for receiving the 4th radiofrequency signal and a third local oscillation signal, and exports the 5th of 100MHz and penetrates Frequency signal；

I/q demodulator is connect with the 4th frequency mixer, for receiving the 5th radiofrequency signal, and exports the I/Q demodulation Signal.

10. 200GHz frequency band signals as described in claim 1 receive and dispatch measuring system, which is characterized in that the transmitting antenna and Waveguide in the receiving antenna is WR4 waveguide.