阅读说明：本技术 面向空间通信的太赫兹实验的信号传输组件及装置 (Signal transmission assembly and device for space communication-oriented terahertz experiment ) 是由 周舒婷 陆川 王磊 于 2020-12-29 设计创作，主要内容包括：本申请提供一种面向空间通信的太赫兹实验的信号传输组件及面向空间通信的太赫兹实验装置,该信号传输组件包括：射频收发端,包括射频发射端及射频接收端；反射块,反射块远离射频收发端设置,且反射块包括第一反射面及第二反射面,第一反射面面向射频发射端设置,第二反射面面向射频接收端设置,射频发射端发射的信号经第一反射面反射至第二反射面,第二反射面将经第一反射面反射的信号反射至射频接收端。本申请能够保证在有限的空间范围内提供相应的视觉通路,继而实现太赫兹实验过程中信号的精准收发,并可提高组件的集成度,使得包括该信号传输组件的太赫兹通信装置适用于面向空间通信的太赫兹实验。(The application provides a terahertz signal transmission subassembly and towards space communication's terahertz experimental apparatus towards space communication's terahertz experiment towards space communication's terahertz, this signal transmission subassembly includes: the radio frequency transceiving end comprises a radio frequency transmitting end and a radio frequency receiving end; the reflecting block is far away from the radio frequency transceiving end and comprises a first reflecting surface and a second reflecting surface, the first reflecting surface is arranged facing the radio frequency transmitting end, the second reflecting surface is arranged facing the radio frequency receiving end, signals transmitted by the radio frequency transmitting end are reflected to the second reflecting surface through the first reflecting surface, and the second reflecting surface reflects the signals reflected by the first reflecting surface to the radio frequency receiving end. According to the terahertz signal transmission assembly, the corresponding visual access can be guaranteed to be provided in a limited space range, accurate receiving and sending of signals in the terahertz experiment process are achieved, the integration level of the assembly can be improved, and the terahertz communication device comprising the signal transmission assembly is suitable for terahertz experiment facing space communication.)

1. The utility model provides a terahertz of space communication experiment's signal transmission subassembly which characterized in that includes:

the radio frequency transceiving end comprises a radio frequency transmitting end and a radio frequency receiving end;

the reflecting block is far away from the radio frequency transceiving end and comprises a first reflecting surface and a second reflecting surface, the first reflecting surface is arranged facing the radio frequency transmitting end, the second reflecting surface is arranged facing the radio frequency receiving end, a signal transmitted by the radio frequency transmitting end is reflected to the second reflecting surface through the first reflecting surface, and the second reflecting surface reflects the signal reflected by the first reflecting surface to the radio frequency receiving end.

2. The signal transmission assembly according to claim 1, wherein a signal emitting direction of the radio frequency emitting end is parallel to a signal incident direction of the radio frequency receiving end, the first reflecting surface is perpendicular to the second reflecting surface, and a bisector of an angle between the first reflecting surface and the second reflecting surface passes through a midpoint of a perpendicular connecting line of the signal emitting direction and the signal incident direction.

3. The signal transmission assembly of claim 1, wherein the reflective block is made of metal, and the first reflective surface and the second reflective surface are polished.

4. A signal transmission assembly according to any one of claims 1 to 3, wherein the end face of the radio frequency transmitting end is parallel to and non-coplanar with the end face of the radio frequency receiving end.

5. The utility model provides a terahertz experimental apparatus towards space communication which characterized in that includes:

the shell is internally provided with an accommodating space and is provided with a bottom plate;

the signal transmission assembly according to any one of claims 1 to 4, mounted in the receiving space, wherein the radio frequency transceiver end and the reflection block are mounted on the base plate.

6. The terahertz experimental device according to claim 5, wherein the housing further comprises a first side plate perpendicularly connected to the bottom plate, the reflection block is located between the first side plate and the rf transceiving end, and the terahertz experimental device further comprises an adjusting member mounted on the first side plate and connected to the reflection block for adjusting a distance between the reflection block and the rf transceiving end.

7. The terahertz experimental device as claimed in claim 5, further comprising a baseband board card, wherein the baseband board card is mounted on the bottom plate, the baseband board card comprises a signal transmitting end and a signal receiving end, the signal transmitting end is in signal connection with the radio frequency transmitting end, and the signal receiving end is connected with the radio frequency receiving end.

8. The terahertz experimental device of claim 7, further comprising a heat sink sandwiched between the baseband board card and the bottom plate.

9. The terahertz experimental device according to claim 7 or 8, wherein the housing further comprises a top plate disposed opposite to the bottom plate, the terahertz experimental device further comprises a local vibration source, the local vibration source is fixed on the top plate, the local vibration source has two signal output ends, and the two signal output ends are respectively connected to the radio frequency transmitting end and the radio frequency receiving end.

10. The terahertz experimental device as claimed in claim 9, further comprising a control board card, wherein the control board card is disposed on the baseband board card and located between the local vibration source and the baseband board card, and the control board card is respectively in signal connection with the local vibration source, the baseband board card and the radio frequency transceiver.

Technical Field

The application relates to the technical field of space communication experiments, in particular to a signal transmission assembly for a terahertz experiment facing space communication and a terahertz experiment device facing space communication.

Background

In the prior art, because terahertz has a plurality of excellent characteristics such as wide band coverage and high transmission speed, the research on terahertz communication is increasing. Currently, research on terahertz communication is mainly performed on the ground. However, moisture in the atmosphere has a strong absorption effect on terahertz, so that signal transmission loss of terahertz in a ground environment is large.

Based on the special environment in the space, the signal transmission loss of the terahertz in the space environment is improved greatly in theory, so that the terahertz is more suitable for space communication. However, since the spatial communication has a high limitation on the size structure of the device, the terrestrial terahertz communication device is not suitable for the terahertz experiment facing the spatial communication.

Disclosure of Invention

An object of the embodiment of the application is to provide a signal transmission assembly and a signal transmission device for a terahertz experiment facing space communication, so as to solve the problem that a ground terahertz communication device in the prior art is not suitable for the terahertz experiment facing space communication.

The application provides a signal transmission subassembly towards terahertz experiment of space communication, includes: the radio frequency transceiving end comprises a radio frequency transmitting end and a radio frequency receiving end; the reflecting block is far away from the radio frequency transceiving end and comprises a first reflecting surface and a second reflecting surface, the first reflecting surface is arranged facing the radio frequency transmitting end, the second reflecting surface is arranged facing the radio frequency receiving end, a signal transmitted by the radio frequency transmitting end is reflected to the second reflecting surface through the first reflecting surface, and the second reflecting surface reflects the signal reflected by the first reflecting surface to the radio frequency receiving end.

The utility model provides a towards signal transmission subassembly of terahertz experiment of space communication, through setting up the reflection block that includes first plane of reflection and second plane of reflection, keep away from the radio frequency receiving and dispatching end setting with the reflection block, and first plane of reflection sets up towards the radio frequency receiving and dispatching end, the second plane of reflection sets up towards the radio frequency receiving terminal, the signal of radio frequency emission end transmission reflects to the second plane of reflection through first plane of reflection, the second plane of reflection reflects the signal of reflection through first plane of reflection to the radio frequency receiving terminal, thereby provide corresponding vision access in limited space range, then realize the accurate receiving and dispatching of terahertz in the experimental process signal, and can improve the integrated level of subassembly, make terahertz communication device including this signal transmission subassembly be applicable to the terahertz experiment towards space communication.

In one embodiment, the signal emitting direction of the radio frequency emitting end is parallel to the signal incident direction of the radio frequency receiving end, the first reflecting surface is perpendicular to the second reflecting surface, and an angle bisector of an included angle between the first reflecting surface and the second reflecting surface passes through a midpoint of a perpendicular connecting line of the signal emitting direction and the signal incident direction.

The utility model provides a signal transmission subassembly towards terahertz experiment of space communication through making the signal outgoing direction of radio frequency transmitting terminal and the signal incoming direction of radio frequency receiving terminal parallel, first plane of reflection is perpendicular with the second plane of reflection, and the angular bisector of the contained angle between first plane of reflection and the second plane of reflection passes through the midpoint of the perpendicular line of signal outgoing direction and signal incoming direction, can guarantee that the signal of terahertz communication experiment receives and dispatches through transmission path.

In one embodiment, the reflection block is made of metal, and the first reflection surface and the second reflection surface are polished.

The utility model provides a signal transmission subassembly towards terahertz experiment of space communication, through the reflection piece that adopts the metal material, and first plane of reflection and second plane of reflection are through the processing of polishing, can reduce the diffuse reflection, reduce signal loss.

In one embodiment, the end surface of the rf transmitting end is parallel to and not coplanar with the end surface of the rf receiving end.

The signal transmission assembly for the terahertz experiment facing the space communication, provided by the application, has the advantages that the length of a signal transmission path can be increased to a certain extent by enabling the end face of the radio frequency transmitting end to be parallel to and not coplanar with the end face of the radio frequency receiving end, and the terahertz experiment facing the space communication is favorably developed.

The application also provides a terahertz experimental apparatus towards space communication, includes: the shell is internally provided with an accommodating space and is provided with a bottom plate; the signal transmission assembly is arranged in the accommodating space, and the radio frequency transceiving end and the reflection block are both arranged on the bottom plate.

In an embodiment, the housing further includes a first side plate perpendicularly connected to the bottom plate, the reflection block is located between the first side plate and the rf transceiving end, and the terahertz experimental apparatus further includes an adjusting piece, the adjusting piece is mounted on the first side plate and connected to the reflection block, and is configured to adjust a distance between the reflection block and the rf transceiving end.

The utility model provides a terahertz experimental apparatus towards space communication, reflection piece set up between first curb plate and radio frequency receiving and dispatching end, and the regulating part is installed on first curb plate and is connected to the reflection piece for adjust the distance between reflection piece and the radio frequency receiving and dispatching end, make the user can adjust the signal transmission distance of terahertz communication experiment according to the experiment needs, develop the terahertz experiment of different signal transmission distances.

In an embodiment, the terahertz experimental device further comprises a baseband board card, the baseband board card is installed on the bottom plate, the baseband board card comprises a signal transmitting end and a signal receiving end, the signal transmitting end is in signal connection with the radio frequency transmitting end, and the signal receiving end is connected with the radio frequency receiving end.

In an embodiment, the terahertz experimental device further comprises a heat sink, and the heat sink is clamped between the baseband board card and the bottom plate.

The terahertz experimental device for space communication provided by the application is convenient for radiating the baseband board card by arranging the radiating fin between the baseband board card and the bottom plate.

In an embodiment, the housing further includes a top plate disposed opposite to the bottom plate, the terahertz experimental apparatus further includes a local vibration source, the local vibration source is fixed on the top plate, the local vibration source has two signal output ends, and the two signal output ends are respectively connected to the radio frequency transmitting end and the radio frequency receiving end.

In an embodiment, the terahertz experimental device further includes a control board card, the control board card is disposed on the baseband board card and located between the local vibration source and the baseband board card, and the control board card is in signal connection with the local vibration source, the baseband board card and the radio frequency transceiving end respectively.

The details of one or more embodiments of the application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the application will be apparent from the description and drawings, and from the claims.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a signal transmission assembly for a terahertz experiment for spatial communication according to an embodiment of the present application.

Fig. 2 is a side perspective view of a terahertz experimental apparatus facing space communication provided in an embodiment of the present application.

Fig. 3 is a top perspective view of a terahertz experimental apparatus facing space communication according to an embodiment of the present application.

Icon: a signal transmission assembly 10; a radio frequency transceiving terminal 11; a reflection block 13; a radio frequency transmitting terminal 111; a radio frequency receiving terminal 113; a transmit antenna 1111; a first radio frequency body 1113; a receiving antenna 1131; a second radio frequency body 1133; a first reflective surface 131; a second reflective surface 133; a housing 20; a bottom plate 21; a first side panel 22; an adjusting member 101; a second side plate 23; a baseband board card 30; a heat sink 31; a top plate 24; the vibration source 40.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Referring to fig. 1, an embodiment of the present application provides a signal transmission assembly 10 for terahertz experiment for spatial communication. The signal transmission module 10 includes a radio frequency transceiver terminal 11 and a reflection block 13.

The radio transceiver end 11 includes a radio transmitter end 111 and a radio receiver end 113. In the embodiment shown in fig. 1, the rf transmitting end 111 is disposed on the rf receiving end 113.

The radio frequency transmitting terminal 111 is used for transmitting terahertz waves. In this embodiment, the rf transmitting end 111 includes a transmitting antenna 1111 and a first rf body 1113. The first rf body 1113 is coupled (e.g., fixedly coupled, removably coupled, etc.) to the transmit antenna 1111. The transmit antenna 1111 is located between the first rf body 1113 and the reflector block 13. In this embodiment, the first rf main body 1113 may have a terahertz subharmonic mixer built therein, and is configured to perform frequency doubling processing on the received communication signal. The transmitting antenna 1111 may be a terahertz antenna. The transmitting antenna 1111 is configured to receive the terahertz wave after frequency doubling processing by the first radio frequency main body 1113, and transmit the received terahertz wave.

The rf receiving end 113 is configured to receive the terahertz wave transmitted by the rf transmitting end 111. The rf receiving end 113 includes a receiving antenna 1131 and a second rf body 1133. The receive antenna 1131 is coupled (e.g., fixedly coupled, removably coupled, etc.) to the second radio frequency body 1133. The receiving antenna 1131 is located between the second radio frequency body 1133 and the reflection block 13. In this embodiment, a terahertz sub-harmonic mixer may be built in the second rf main body 1133, and is used to down-convert the communication signal. The receiving antenna 1131 may be a terahertz antenna. The receiving antenna 1131 is configured to receive the terahertz wave transmitted by the transmitting antenna 1111 and send the received terahertz wave to the second radio frequency body 1133.

In this embodiment, the transmitting antenna 1111 is disposed on the receiving antenna 1131, a central axis of the transmitting antenna 1111 is parallel to a central axis of the receiving antenna 1131, and the central axis of the transmitting antenna 1111 and the central axis of the receiving antenna 1131 are on the same plane. Thus, the signal emitting direction of the radio frequency emitting end 111 corresponds to the central axis of the emitting antenna 1111, and the signal incident direction of the radio frequency receiving end 113 corresponds to the central axis of the receiving antenna 1131, so that the signal emitting direction of the radio frequency emitting end 111 and the signal incident direction of the radio frequency receiving end 113 are parallel to each other; meanwhile, the structural integration level of the signal transmission assembly 10 can be effectively improved, so that the radio frequency transceiving end 11 is convenient to manufacture, position and install.

Optionally, the end face of the rf transmitting end 111 is parallel to and not coplanar with the end face of the rf receiving end 113. The end face of the radio frequency transmitting end 111 is parallel to and not coplanar with the end face of the radio frequency receiving end 113, so that the length of a signal transmission path can be increased to a certain extent, and the development of a terahertz experiment facing space communication is facilitated. In this embodiment, the end surface of the rf transmitting end 111 refers to an end surface of the transmitting antenna 1111 away from the first rf body 1113. The end face of the rf receiving end 113 refers to the end face of the receiving antenna 1131 at the end away from the second rf body 1133.

The reflection block 13 is disposed away from the rf transceiving end 11.

In this embodiment, the reflection block 13 includes a first reflection surface 131 and a second reflection surface 133. The first reflective surface 131 is disposed facing the rf transmitting end 111, and the first reflective surface 131 is located in a signal emitting direction of the rf transmitting end 111. The second reflecting surface 133 is disposed facing the rf receiving end 113, and is located on a reverse extension line of the signal incidence direction of the rf receiving end 113. The signal transmitted by the rf transmitting end 111 is reflected by the first reflecting surface 131 to the second reflecting surface 133. The second reflecting surface 133 reflects the signal reflected by the first reflecting surface 131 to the rf receiving end 113.

Specifically, the first reflecting surface 131 is disposed facing the transmitting antenna 1111, and the second reflecting surface 133 is disposed facing the receiving antenna 1131. The signal transmitted by the first rf body 1113 is transmitted by the transmitting antenna 1111 and then reflected by the first reflecting surface 131 to the second reflecting surface 133. The second reflecting surface 133 reflects the signal reflected by the first reflecting surface 131 to the rf receiving end 113 to be received by the receiving antenna 1131, and then sends the signal to the second rf body 1133.

Optionally, the reflective block 13 is made of metal, and the first reflective surface 131 and the second reflective surface 133 are polished. Since the reflective block 13 is made of a metal material, the first reflective surface 131 and the second reflective surface 133 are polished, so that diffuse reflection can be reduced, and signal loss can be reduced.

In this embodiment, as shown in fig. 1, the first reflective surface 131 is perpendicular to the second reflective surface 133. An angular bisector of an included angle between the first reflective surface 131 and the second reflective surface 133 passes through a midpoint of a vertical connecting line between the signal emitting direction of the rf transmitting end 111 and the signal incident direction of the rf receiving end 113. In other words, an included angle α formed between the signal emitting direction of the rf transmitting terminal 111 and the first reflecting surface 131 and an included angle β formed between the reverse extension line of the signal incident direction of the rf receiving terminal 113 and the second reflecting surface 133 are equal, and a perpendicular distance between a bisector of the included angle between the first reflecting surface 131 and the second reflecting surface 133 and the signal emitting direction of the rf transmitting terminal 111 is equal to a perpendicular distance between the bisector and the reverse extension line of the signal incident direction of the rf receiving terminal 113. In this embodiment, the central axis of the transmitting antenna 1111 extends towards the first reflecting surface 131 to form an included angle α with the first reflecting surface 131, and the central axis of the receiving antenna 1131 extends towards the second reflecting surface 133 to form an included angle β with the second reflecting surface 133, where the included angle α is opposite to the included angle β, and both the included angle α and the included angle β are 135 °. Therefore, signals of the terahertz communication experiment can be guaranteed to be transmitted and received through the transmission path.

Optionally, the first reflective surface 131 intersects the second reflective surface 133.

Alternatively, the signal emitting direction of the rf transmitting terminal 111 passes through the center of the first reflecting surface 131, and the opposite extension line of the signal incident direction of the rf receiving terminal 113 passes through the center of the second reflecting surface 133.

Optionally, in a direction perpendicular to the drawing in fig. 1, the width of the reflection block 13 is greater than the width of the rf transceiver end 11, and an absolute value of a difference between the two is smaller than the predetermined value. The preset value is less than 5 cm. The arrangement is convenient for realizing the alignment between the reflection block 13 and the radio frequency transceiving end 11 when the signal transmission assembly 10 is installed.

The signal transmission assembly for the terahertz experiment facing the space communication, provided by the embodiment of the application, is characterized in that the reflection block comprising the first reflection surface and the second reflection surface is arranged, the reflection block is far away from the radio frequency transceiving end, the first reflection surface is arranged facing the radio frequency transceiving end, the second reflection surface is arranged facing the radio frequency receiving end, a signal transmitted by the radio frequency transmitting end is reflected to the second reflection surface through the first reflection surface, the second reflection surface reflects the signal reflected by the first reflection surface to the radio frequency receiving end, the signal in the terahertz experiment process can be transmitted and received in a limited space range, and therefore the integration level of the assembly is improved, and the terahertz communication device comprising the signal transmission assembly is suitable for the terahertz experiment facing the space communication.

Referring to fig. 2 and fig. 3, based on the same inventive concept, an embodiment of the present application further provides a terahertz experimental apparatus 100 for space-oriented communication. The terahertz experimental device 100 includes a housing 20 and the signal transmission assembly 10. The housing 20 has a receiving space formed therein. The signal transmission assembly 10 is installed in the receiving space.

In this embodiment, the housing 20 may be a closed rectangular parallelepiped structure formed by enclosing a plurality of plate bodies. The housing 20 has a bottom plate 21. The radio frequency transceiver terminal 11 and the reflection block 13 are mounted on the bottom plate 21.

In this embodiment, the housing 20 further includes a first side plate 22 perpendicularly connected to the bottom plate 21. The reflection block 13 is located between the first side board 22 and the rf transceiving end 11. The terahertz experimental device 100 further comprises a regulating part 101. The adjusting member 101 is mounted on the first side plate 22 and connected to the reflection block 13 for adjusting a distance between the reflection block 13 and the rf transceiving end 11. Through regulating part 101, the signal transmission distance of terahertz communication experiment can be adjusted according to the experiment needs to the user, develops terahertz experiment of different signal transmission distances.

Alternatively, the adjustment member 101 may be a screw. The extension direction of the screw portion of the screw is parallel to the bisector of the angle between the first and second reflecting surfaces 131 and 133. The first side plate 22 may be provided with a through hole, and correspondingly, a mounting hole may be formed in a side of the reflection block 13 opposite to the first emitting surface 131 and the second emitting surface 133, and the distance between the reflection block 13 and the rf transceiver end 11 is adjusted by adjusting a distance that a screw penetrates through the through hole and then extends into the mounting hole. It is understood that the number of the adjusting members 101 may be plural to avoid the deflection of the reflection block 13 during the adjustment. In addition, the adjusting member 101 can also function to fix the reflection block 13 to some extent.

In this embodiment, the housing 20 further includes a second side plate 23 vertically connected to the bottom plate 21 and the first side plate 22. The radio frequency transceiving end 11 and the reflection block 13 are both installed on the bottom plate 21 and are both disposed close to the second side plate 23. With this arrangement, when the signal transmission module 10 is installed in the accommodating space, the second side plate 23 can assist in aligning the rf transceiver end 11 and the reflection block 13.

In this embodiment, the terahertz experimental apparatus 100 further includes a baseband board card 30. The baseband board card 30 is installed on the bottom board 21 and is spaced in parallel with the signal transmission assembly 10.

Alternatively, the base plate 21 may be provided with a plurality of posts (not shown) on which the baseband board 30 is mounted. For example, mounting holes are provided on the baseband board 30 corresponding to the plurality of posts, and the mounting of the baseband board 30 to the bottom plate 21 is realized by inserting the posts into the corresponding mounting holes.

The baseband board 30 includes a signal transmitting end and a signal receiving end (not shown). The signal transmitting end may include a DAC (digital-to-analog conversion) chip. The signal receiving end may include an ADC (analog-to-digital conversion) chip. The signal transmitting end is in signal connection with the radio frequency transmitting end 111, and the signal receiving end is in signal connection with the radio frequency receiving end 113. Specifically, the signal transmitting end is in signal connection with the first rf body 1113, and the signal receiving end is in signal connection with the second rf body 1133. It can be understood that, as long as the signal connection between the signal transmitting end and the radio frequency transmitting end 111 and the signal connection between the signal receiving end and the radio frequency receiving end 113 can be achieved, the specific manner of achieving the signal connection is not limited in the present application, and for example, the signal connection may be achieved through a data line.

Optionally, the terahertz experimental device 100 further includes a heat sink 31. The heat sink 31 is interposed between the baseband board card 30 and the chassis 21. The heat sink 31 is interposed between the baseband board 30 and the bottom plate 21, so that the baseband board can be conveniently cooled, and the heat generated by the baseband board 30 is conducted to the outside through the heat sink 31 and the bottom plate 21.

Alternatively, the heat sink 31 may be a heat sink copper sheet, and the shape of the heat sink 31 may be circular.

Optionally, the heat sink 31 has a plurality of through holes corresponding to the plurality of pillars. The support posts are inserted into the corresponding mounting holes on the baseband board card 30 after passing through the corresponding through holes on the heat sink 31, so that the heat sink is clamped between the baseband board card 30 and the bottom plate 21. It will be appreciated that the studs on the base plate 21 may be replaced by screws.

Optionally, the size of the heat sink 31 is smaller than the size of the baseband board card 30.

In this embodiment, the housing 20 further includes a top plate 24 disposed opposite the bottom plate 21. The terahertz experimental device 100 further comprises a local vibration source 40. The present vibration source 40 is fixed to the top plate 24. Illustratively, the top plate 24 may be provided with a plurality of posts on which the local vibration source 40 is mounted. The specific implementation manner of the vibration source 40 mounted on the plurality of pillars of the top plate 24 is similar to the specific implementation manner of the baseband board card 30 mounted on the plurality of pillars of the bottom plate 21, and is not described herein again.

Optionally, the vertical projection of the local vibration source 40 to the bottom plate 21 partially or completely coincides with the vertical projection of the baseband board card 30 to the bottom plate 21, thereby contributing to reducing the structural size of the terahertz experimental device 100.

The local oscillator 40 has two signal outputs (not shown). The two signal output ends are respectively connected with the rf transmitting end 111 and the rf receiving end 113. Specifically, the two signal output terminals are respectively connected to the first rf body 1113 and the second rf body 1133. It can be understood that, as long as signal connection between the two signal output ends of the local oscillator 40 and the rf transmitting end 111 and the rf receiving end 113 can be achieved, the present application does not limit the specific manner of achieving signal connection, for example, signal connection may be achieved through a data line.

In this embodiment, the terahertz experimental apparatus 100 further includes a control board (not shown). The control board card is used for controlling the overall work of the terahertz experimental device. The control board card is arranged on the baseband board card 30 and is located between the local vibration source 40 and the baseband board card 30. The control board card is respectively connected with the local vibration source 40, the baseband board card 30 and the radio frequency transceiving end 13 through signals. Optionally, the vertical projection of the control board to the bottom plate 21 coincides with the vertical projection of the baseband board 30 to the bottom plate 21, thereby contributing to reducing the structural size of the terahertz experimental device 100.

It can be understood that the terahertz experimental apparatus 100 further includes a power supply module (not shown). The power module is in signal connection with the control board card. The control board is used for converting the electric energy provided by the power module into the rated voltage required by the corresponding component according to the rated voltage of each electric component (for example, the local vibration source 40, the baseband board 30, the radio frequency transceiver 13, etc.), and providing the electric energy to the corresponding component.

Next, the operation of the terahertz experimental apparatus 100 will be briefly described.

The control board drives the signal transmitting end of the baseband board 30 to transmit a communication signal to the first radio frequency main body 1113, the signal output end of the local vibration source 40 in signal connection with the first radio frequency main body 1113 outputs a high frequency signal to carry out frequency doubling on the communication signal, an experimental signal is generated, the experimental signal is transmitted through the transmitting antenna 1111, is reflected by the first reflecting surface 1331 and the second reflecting surface 1333 in sequence, is received by the receiving antenna 1131, and returns to the baseband board 30 through the second radio frequency main body 1133 and the signal receiving end in signal connection with the second radio frequency main body 1133, and the communication experiment is completed.

Specifically, the baseband board 30 performs algorithm processing such as encoding and modulation on data information under the driving of the control board, converts the data information into an analog signal (i.e., a communication signal) through a DAC (digital-to-analog conversion) chip at the signal transmitting end, and outputs the analog signal to the first radio frequency main body 1113. The first radio frequency body 1113 up-converts the analog signal to a terahertz frequency band by using a terahertz subharmonic mixer based on a high-frequency signal of a local vibration source to form terahertz waves, and then emits the terahertz waves through the transmitting antenna 1111. The terahertz waves are reflected by the first reflecting surface 1331 and the second reflecting surface 1333, received by the receiving antenna 1131, input to the second radio frequency main body 1133, down-converted to an intermediate frequency by the terahertz sub-harmonic mixer at the position, and the communication signals after down-conversion are sampled by an ADC chip at the signal receiving end of the baseband board 30, decoded, demodulated and the like by the baseband board 30, and recovered to an original data sequence, and the error rate of the whole sequence is verified.

In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.