CN112422170A - Near-field automatic detection method for dual-band radio frequency equipment - Google Patents
Near-field automatic detection method for dual-band radio frequency equipment Download PDFInfo
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- CN112422170A CN112422170A CN202011237383.6A CN202011237383A CN112422170A CN 112422170 A CN112422170 A CN 112422170A CN 202011237383 A CN202011237383 A CN 202011237383A CN 112422170 A CN112422170 A CN 112422170A
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Abstract
The invention relates to the technical field of operation and maintenance of satellite communication equipment, and particularly discloses a near-field automatic detection method for dual-band radio frequency equipment. The invention can effectively detect the health working state of the servo system, reduce the detection time, accurately and truly simulate the running state of the satellite transponder and reduce the time of the communication joint debugging of the earth-air satellite.
Description
Technical Field
The invention relates to the technical field of operation and maintenance of satellite communication equipment, in particular to a near field automatic detection method for dual-band radio frequency equipment.
Background
The ground simulation satellite transponder is used for replacing the satellite transponder to perform low-noise amplification, filtering and frequency mixing on an uplink signal sent by the ground integrated workstation to generate a downlink signal and send the downlink signal to a ground user, and the space loss of the simulation uplink and downlink links is matched with other instruments to perform system joint debugging test, so that the interference on the normal communication service of the satellite is avoided.
With the increasing requirements for satellite communication capability, the requirements for automatic detection of ground-based analog satellite transponders have also increased. The ground simulation satellite transponder near field test and the far field test have essential difference on performance estimation of a satellite communication ground-air transmission system, and the near field test is required to avoid the problems of complex point selection of test points, limitation of sampling planes and the like so as to effectively improve the test result. Meanwhile, in the near-field test, after short waves are reflected by the primary reflecting surface, the secondary reflecting surface and other reflecting surfaces under the near-field condition, the field condition of a near-field space becomes disordered, and the test difficulty is improved.
As shown in fig. 1, which is a schematic diagram of a near-field automatic detection method of a conventional antenna servo system in the prior art, a ground workstation sends attitude control information to a work antenna, and the work antenna feeds back the control information to the ground workstation.
Disclosure of Invention
The invention aims to provide a near-field automatic detection method for a dual-band radio frequency device, which aims to solve the problems of single data comparison, low detection reliability and the like of the near-field automatic detection method for an antenna servo system in the prior art.
In order to solve the technical problem, the invention provides a near-field automatic detection method for a dual-band radio frequency device, which comprises the following steps:
s1, arranging a full-band horn antenna on the rear side of a working antenna and fixing, wherein the horn mouth of the full-band horn antenna always faces to the right upper side;
s2, the full-band horn antenna is matched with a ground simulation satellite transponder to send and receive short waves of corresponding frequency bands, and short wave data detection of full-band full postures of the working antenna is carried out through the full-band horn antenna;
s3, simultaneously comparing the detection data with the tested full-band antenna operation attitude database and the operation parameter data of the operation antenna of the ground comprehensive workstation;
and S4, judging whether the three-party comparison data is stably kept within a working standard threshold through level data obtained by testing the ground simulation satellite transponder in a single carrier working state and a forwarding working state, thereby completing automatic detection of a servo system in a satellite communication link under a near-field condition.
Preferably, in step S1, the full-band horn antenna covers Ka and Ku bands, and the working antenna is a cassegrain antenna.
Preferably, in step S2, the ground simulation satellite repeater has three operating states, namely, a beacon mode, a repeating mode and a standby mode, the ground simulation repeater provides a single carrier with a Ku band of 12.25GHz to 12.75GHz and a Ka band of 19.6GHz to 21.2GHz in the beacon mode, and the ground simulation repeater provides a Ku band repeating input frequency of 13.75GHz to 14.00GHz and a Ka band repeating input frequency of 29.4GHz to 31.0GHz in the repeating mode.
Preferably, in step S3, the method for recording the full-band antenna operation attitude database is as follows: the ground simulation satellite transponder and the full-band horn antenna are firstly arranged at the working positions of the cassegrain antenna, the ground workstation sends an instruction to gradually assign the cassegrain antenna to the corresponding attitude setting points through the servo system, the ground simulation satellite transponder respectively carries out a single carrier working state and a forwarding working state at each attitude setting point, the level data and the antenna attitude data of each attitude setting point are recorded together, and the setting point data is recorded into a full-band antenna operation attitude database.
Preferably, the level data includes frequency, signal strength, and signal attenuation, and the antenna attitude data includes an antenna azimuth angle, an antenna elevation angle, a polarization deck angle, and a cross deck angle.
Preferably, in step S4, the test procedure of the terrestrial analog repeater in the single carrier operating state is as follows: the ground workstation sets working parameters of the working antenna, adjusts the working antenna to a certain attitude set point, then the ground workstation sends a Ka/Ku frequency band single carrier transmission information setting command to the ground simulation satellite transponder through the Ethernet, the ground simulation satellite transponder generates the Ka/Ku frequency band single carrier according to the designated command and records the transmission information, the single carrier is received by the working antenna after the single carrier is sent by the Ka/Ku full-frequency band horn antenna, the single carrier is transmitted back to the ground workstation through the Ethernet after the working antenna receives the single carrier information, meanwhile, the ground simulation satellite transponder also transmits the transmission information back to the ground workstation, the ground workstation compares the received level data with the full-frequency band antenna operation attitude database to perform standard threshold data comparison, and completes a fixed attitude set point near-field automatic test process of the servo system facing the ground simulation satellite transponder, and changing an attitude setting point to repeat the operation, wherein the level change and the parameter change of the detection working antenna servo system meet the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the automatic test of the ground simulation satellite transponder near field.
Preferably, in step S4, the test procedure of the ground-based simulation repeater in the forwarding operation state is as follows: the ground workstation sets working parameters of the working antenna first, adjusts the working antenna to a certain attitude setting point, the ground workstation sends a command for setting Ka/Ku frequency band single carrier information to the working antenna, the working antenna sends Ka/Ku frequency band single carrier after receiving the command, the ground simulation satellite transponder receives the Ka/Ku frequency band single carrier through the Ka/Ku full-frequency band horn antenna, the ground workstation sends a command for setting Ka/Ku frequency band single carrier forwarding to the ground simulation satellite transponder, the ground simulation satellite transponder receives the command, then forwards the Ka/Ku frequency band single carrier information and records forwarding level data, the forwarded Ka/Ku frequency band information is sent through the Ka/Ku full-frequency band horn antenna, the sent Ka/Ku frequency band information after forwarding is received by the working antenna, the working antenna transmits received forwarded single-carrier level data back to the ground workstation, meanwhile, the ground simulation satellite transponder transmits forwarding information back to the ground workstation, the ground workstation compares the received level information with standard threshold data of a full-band antenna operation attitude database, a fixed attitude setting point near-field automatic test process of the servo system facing the ground simulation satellite transponder is completed, the attitude setting point is changed to repeat the operation, the level change and the detection of the parameter change of the working antenna servo system accord with the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the near-field automatic test of the ground simulation satellite transponder.
Compared with a far field test method of a ground simulation satellite transponder, the near field automatic detection method of the dual-band radio frequency equipment avoids the problems of difficult point selection of far field test points and the like, improves the flexibility of satellite joint debugging test without considering the problem of plane selection, realizes a novel near field test method of automatic detection of satellite communication equipment within a standard threshold by detecting and comparing short wave data of full-band full postures of a working antenna through a fixed full-band horn antenna under the condition that a Cassegrain antenna has a near field electromagnetic wave environment with multiple reflecting surfaces and complex and changeable complex fields, more effectively detects the healthy working state of a servo system, reduces the detection time of the servo system, more accurately and truly simulates the running state of the satellite transponder, reduces the ground-air satellite communication joint debugging time, effective guarantee is added for the operation and maintenance of the satellite communication equipment.
Drawings
FIG. 1 is a schematic diagram of a conventional antenna servo system near-field automatic detection method in the prior art;
fig. 2 is a schematic diagram of a near-field automatic detection method for a dual-band rf device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an operating state of an automatic test of an operating antenna according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an automatic testing process of a single carrier operating state of a satellite transponder facing the ground in the servo system according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating an automated testing of the forwarding operation status of the satellite transponder facing the ground in the servo system according to an embodiment of the present invention;
FIG. 6 is a comparison chart of data detection of antenna azimuth angles in an embodiment of the present invention;
FIG. 7 is a comparison diagram of data detection of the pitch angle of the antenna in an embodiment of the present invention;
FIG. 8 is a comparison graph of data detection of polarized reticle angles in an embodiment of the present invention;
FIG. 9 is a comparison graph of data detection of intersecting deck corners in an embodiment of the invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 2, the method for automatically detecting a near field of a dual-band rf device in this embodiment includes the following steps:
s1, arranging a full-band horn antenna at the rear side of a working antenna and fixing, wherein the horn mouth of the full-band horn antenna always faces to the right upper side, as shown in a figure 3; the full-band horn antenna covers the Ka frequency band and the Ku frequency band, and the working antenna is a Cassegrain antenna.
S2, the full-band horn antenna is matched with a ground simulation satellite transponder to transmit and receive short waves of corresponding frequency bands, and in a near-field electromagnetic wave environment with a multiple reflecting surface and a complex and changeable complex field, the full-band horn antenna is used for detecting the short wave data of the full-band full attitude of the working antenna; the ground simulation satellite transponder is provided with three working states of a beacon mode, a forwarding mode and a standby mode, the ground simulation transponder provides a single carrier with Ku wave band ranges from 12.25GHz to 12.75GHz and Ka wave band ranges from 19.6GHz to 21.2GHz in the beacon mode, and the ground simulation transponder provides Ku frequency band forwarding input frequency ranges from 13.75GHz to 14.00GHz and Ka frequency band forwarding input frequency ranges from 29.4GHz to 31.0GHz in the forwarding mode.
S3, simultaneously comparing the detection data with the tested full-band antenna operation attitude database and the operation parameter data of the operation antenna of the ground comprehensive workstation;
the recording method of the full-band antenna operation attitude database comprises the following steps: the ground simulation satellite transponder and the full-band horn antenna are firstly arranged at the working positions of the Cassegrain antenna, the ground workstation sends an instruction to gradually assign corresponding attitude setting points to the Cassegrain antenna through a servo system, the ground simulation satellite transponder respectively carries out a single carrier working state and a forwarding working state at each attitude setting point, level data and antenna attitude data of each attitude setting point are jointly recorded, the setting point data are recorded into a full-band antenna operation attitude database, the level data comprise frequency, signal intensity, signal attenuation and the like, and the antenna attitude data comprise an antenna direction angle, an antenna pitch angle, a polarized deck angle, a crossed deck angle and the like.
S4, level data obtained by testing the ground simulation satellite transponder in a single carrier working state and a forwarding working state is used for judging whether three-party comparison data are stably kept within a working standard threshold or not, and after the three-party comparison data are changed from one posture to another posture, the level data change accords with database change data, the detection method system judges that the posture change is correct, so that the automatic detection of a servo system in a satellite communication link is completed under the near field condition;
level data information such as frequency, signal intensity, signal attenuation and the like is obtained through testing of a ground simulation satellite transponder in a single carrier working state and a forwarding working state, so that data support is made for changes of an antenna servo system, and a servo system parameter change angle is judged;
as shown in fig. 4, the test flow of the terrestrial analog repeater in the single carrier operating state is as follows: the ground workstation sets working parameters of the working antenna, adjusts the working antenna to a certain attitude set point, then the ground workstation sends a Ka/Ku frequency band single carrier transmission information setting command to the ground simulation satellite transponder through the Ethernet, the ground simulation satellite transponder generates the Ka/Ku frequency band single carrier according to the designated command and records the transmission information, the single carrier is received by the working antenna after the single carrier is sent by the Ka/Ku full-frequency band horn antenna, the single carrier is transmitted back to the ground workstation through the Ethernet after the working antenna receives the single carrier information, meanwhile, the ground simulation satellite transponder also transmits the transmission information back to the ground workstation, the ground workstation compares the received level data with the full-frequency band antenna operation attitude database to perform standard threshold data comparison, and completes a fixed attitude set point near-field automatic test process of the servo system facing the ground simulation satellite transponder, and changing an attitude setting point to repeat the operation, wherein the level change and the parameter change of the detection working antenna servo system meet the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the automatic test of the ground simulation satellite transponder near field.
As shown in fig. 5, the testing procedure of the ground-based analog repeater in the repeating operating state is as follows: the ground workstation sets working parameters of the working antenna first, adjusts the working antenna to a certain attitude setting point, the ground workstation sends a command for setting Ka/Ku frequency band single carrier information to the working antenna, the working antenna sends Ka/Ku frequency band single carrier after receiving the command, the ground simulation satellite transponder receives the Ka/Ku frequency band single carrier through the Ka/Ku full-frequency band horn antenna, the ground workstation sends a command for setting Ka/Ku frequency band single carrier forwarding to the ground simulation satellite transponder, the ground simulation satellite transponder receives the command, then forwards the Ka/Ku frequency band single carrier information and records forwarding level data, the forwarded Ka/Ku frequency band information is sent through the Ka/Ku full-frequency band horn antenna, the sent Ka/Ku frequency band information after forwarding is received by the working antenna, the working antenna transmits received forwarded single-carrier level data back to the ground workstation, meanwhile, the ground simulation satellite transponder transmits forwarding information back to the ground workstation, the ground workstation compares the received level information with standard threshold data of a full-band antenna operation attitude database, a fixed attitude setting point near-field automatic test process of the servo system facing the ground simulation satellite transponder is completed, the attitude setting point is changed to repeat the operation, the level change and the detection of the parameter change of the working antenna servo system accord with the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the near-field automatic test of the ground simulation satellite transponder.
As shown in fig. 6 to 9, the antenna attitude data (antenna direction angle, antenna pitch angle, polarized deck angle, and crossed deck angle) at each attitude setting point is compared with the level data to determine whether the servo system is within the antenna attitude change criterion threshold, and thus to determine the health condition of the antenna servo system.
The near-field automatic detection method for the dual-band radio frequency equipment in the embodiment takes a Ka/Ku dual-band Cassegrain antenna as an example, and carries out near-field automatic test on a servo system in satellite communication.
Compared with a far field test method of a ground simulation satellite transponder, the near field automatic detection method of the dual-band radio frequency equipment avoids the problems of difficult point selection of far field test points and the like, improves the flexibility of satellite joint debugging test without considering the problem of plane selection, realizes a novel near field test method of automatic detection of satellite communication equipment within a standard threshold by detecting and comparing short wave data of full-band full postures of a working antenna through a fixed full-band horn antenna under the condition that a Cassegrain antenna has a near field electromagnetic wave environment with multiple reflecting surfaces and complex and changeable complex fields, more effectively detects the healthy working state of a servo system, reduces the detection time of the servo system, more accurately and truly simulates the running state of the satellite transponder, reduces the ground-air satellite communication joint debugging time, effective guarantee is added for the operation and maintenance of the satellite communication equipment.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. A near-field automatic detection method for a dual-band radio frequency device is characterized by comprising the following steps:
s1, arranging a full-band horn antenna on the rear side of a working antenna and fixing, wherein the horn mouth of the full-band horn antenna always faces to the right upper side;
s2, the full-band horn antenna is matched with a ground simulation satellite transponder to send and receive short waves of corresponding frequency bands, and short wave data detection of full-band full postures of the working antenna is carried out through the full-band horn antenna;
s3, simultaneously comparing the detection data with the tested full-band antenna operation attitude database and the operation parameter data of the operation antenna of the ground comprehensive workstation;
and S4, judging whether the three-party comparison data is stably kept within a working standard threshold through level data obtained by testing the ground simulation satellite transponder in a single carrier working state and a forwarding working state, thereby completing automatic detection of a servo system in a satellite communication link under a near-field condition.
2. The near-field automatic detection method for the dual-band radio frequency device according to claim 1, wherein in step S1, the full-band horn antenna covers Ka band and Ku band, and the working antenna is a cassegrain antenna.
3. The near-field automatic detection method for the dual-band radio frequency device according to claim 2, wherein in step S2, the terrestrial analog satellite transponder has three operating states, namely, a beacon mode, a forwarding mode and a standby mode, the terrestrial analog transponder provides a single carrier with a Ku band of 12.25 GHz-12.75 GHz and a Ka band of 19.6 GHz-21.2 GHz in the beacon mode, and the terrestrial analog transponder provides a Ku band forwarding input frequency of 13.75 GHz-14.00 GHz and a Ka band forwarding input frequency of 29.4 GHz-31.0 GHz in the forwarding mode.
4. The near-field automatic detection method for the dual-band radio frequency device according to claim 3, wherein in the step S3, the entry method for the operation attitude database of the full-band antenna is as follows: the ground simulation satellite transponder and the full-band horn antenna are firstly arranged at the working positions of the cassegrain antenna, the ground workstation sends an instruction to gradually assign the cassegrain antenna to the corresponding attitude setting points through the servo system, the ground simulation satellite transponder respectively carries out a single carrier working state and a forwarding working state at each attitude setting point, the level data and the antenna attitude data of each attitude setting point are recorded together, and the setting point data is recorded into a full-band antenna operation attitude database.
5. The near-field automatic detection method for dual-band radio frequency devices of claim 4, wherein the level data comprises frequency, signal strength and signal attenuation, and the antenna attitude data comprises antenna azimuth angle, antenna elevation angle, polarized deck angle and cross deck angle.
6. The near-field automatic detection method for dual-band radio frequency devices according to claim 5, wherein in step S4, the test procedure of the terrestrial analog repeater in the single-carrier operating state is as follows: the ground workstation sets working parameters of the working antenna, adjusts the working antenna to a certain attitude set point, then the ground workstation sends a Ka/Ku frequency band single carrier transmission information setting command to the ground simulation satellite transponder through the Ethernet, the ground simulation satellite transponder generates the Ka/Ku frequency band single carrier according to the designated command and records the transmission information, the single carrier is received by the working antenna after the single carrier is sent by the Ka/Ku full-frequency band horn antenna, the single carrier is transmitted back to the ground workstation through the Ethernet after the working antenna receives the single carrier information, meanwhile, the ground simulation satellite transponder also transmits the transmission information back to the ground workstation, the ground workstation compares the received level data with the full-frequency band antenna operation attitude database to perform standard threshold data comparison, and completes a fixed attitude set point near-field automatic test process of the servo system facing the ground simulation satellite transponder, and changing an attitude setting point to repeat the operation, wherein the level change and the parameter change of the detection working antenna servo system meet the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the automatic test of the ground simulation satellite transponder near field.
7. The near field automatic detection method for dual band rf devices of claim 5, wherein in step S4, the test procedure of the terrestrial analog repeater in the repeating operation state is as follows: the ground workstation sets working parameters of the working antenna first, adjusts the working antenna to a certain attitude setting point, the ground workstation sends a command for setting Ka/Ku frequency band single carrier information to the working antenna, the working antenna sends Ka/Ku frequency band single carrier after receiving the command, the ground simulation satellite transponder receives the Ka/Ku frequency band single carrier through the Ka/Ku full-frequency band horn antenna, the ground workstation sends a command for setting Ka/Ku frequency band single carrier forwarding to the ground simulation satellite transponder, the ground simulation satellite transponder receives the command, then forwards the Ka/Ku frequency band single carrier information and records forwarding level data, the forwarded Ka/Ku frequency band information is sent through the Ka/Ku full-frequency band horn antenna, the sent Ka/Ku frequency band information after forwarding is received by the working antenna, the working antenna transmits received forwarded single-carrier level data back to the ground workstation, meanwhile, the ground simulation satellite transponder transmits forwarding information back to the ground workstation, the ground workstation compares the received level information with standard threshold data of a full-band antenna operation attitude database, a fixed attitude setting point near-field automatic test process of the servo system facing the ground simulation satellite transponder is completed, the attitude setting point is changed to repeat the operation, the level change and the detection of the parameter change of the working antenna servo system accord with the change range in the standard threshold of the full-band antenna operation attitude database, and the servo system is determined to finish the near-field automatic test of the ground simulation satellite transponder.
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| CN115037347A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Dual-band satellite communication simulation transponder |
| CN115037349A (en) * | 2022-05-11 | 2022-09-09 | 中国人民解放军陆军装甲兵学院 | Wireless dual-band satellite communication simulation transponder |
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