CN112887051A - Unmanned aerial vehicle remote control signal interference unit and use method thereof - Google Patents
Unmanned aerial vehicle remote control signal interference unit and use method thereof Download PDFInfo
- Publication number
- CN112887051A CN112887051A CN202110031171.0A CN202110031171A CN112887051A CN 112887051 A CN112887051 A CN 112887051A CN 202110031171 A CN202110031171 A CN 202110031171A CN 112887051 A CN112887051 A CN 112887051A
- Authority
- CN
- China
- Prior art keywords
- unmanned aerial
- aerial vehicle
- dds
- remote control
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/92—Jamming or countermeasure characterized by its function related to allowing or preventing remote control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
Abstract
An unmanned aerial vehicle remote control signal jammer and a using method thereof relate to the technical field of unmanned aerial vehicle interception and capture, and comprise an FPGA, a DDS, a clock input, a first local oscillator input, a second local oscillator input, a first up-conversion, a second up-conversion, a first band-pass filter and a second band-pass filter, wherein the unmanned aerial vehicle remote control signal jammer is externally connected with a power supply and a transmitting antenna, the FPGA comprises an internal control instruction, signal characteristics, data analysis, digital modulation and parameter configuration, control data and signal characteristic parameters are used as the input of the FPGA, the output end of the FPGA is connected with the DDS, the clock input is used as the other group of input of the DDS, the DDS respectively outputs two paths of intermediate frequency signals to the first up-conversion and the second up-conversion, the first up-conversion outputs 5.8-5.9 GHz radio frequency signals to the first band-pass filter, the second up-conversion outputs 2.4-2.5 GHz radio frequency signals, the problems of radiation, high power and high cost of a user in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of unmanned aerial vehicle interception and capture, in particular to an unmanned aerial vehicle remote control signal interference unit and a using method thereof.
Background
With the increasing market of unmanned aerial vehicles, the threat of the unmanned aerial vehicle target to public safety is also increasing, and at present, the most effective method for intercepting the unmanned aerial vehicle is to cut off the communication link of the unmanned aerial vehicle through an interference signal so as to enable the unmanned aerial vehicle to lose control. At present, an unmanned aerial vehicle communication link interference product on the market mainly adopts blocking interference, the blocking interference emits a white noise interference signal larger than the ISM frequency band bandwidth, and the communication link of the unmanned aerial vehicle is effectively blocked. However, the power of the blocking jamming device is limited, the white noise jamming signal only affects the signal-to-noise ratio of the communication signal, when the unmanned aerial vehicle is far away, the power attenuation of the jamming signal is serious, and the blocking jamming device cannot effectively block the communication link of the unmanned aerial vehicle at a long distance because the receiver of the unmanned aerial vehicle has the white noise resistance.
The prior art unmanned aerial vehicle remote control signal interference unit can only realize through the output who increases interference signal for promoting the working distance, because the high-power transmitter cost of unmanned aerial vehicle remote control signal interference unit is expensive and can produce the radiation to the user of closely, and power is big, with high costs, needs to improve.
Disclosure of Invention
The invention provides an unmanned aerial vehicle remote control signal interference unit and a using method thereof, and aims to solve the problems that the unmanned aerial vehicle remote control signal interference unit in the prior art generates radiation to a user, and is high in power and high in cost.
The unmanned aerial vehicle remote control signal interference unit comprises an FPGA, a DDS, a clock input, a first local oscillator input, a second local oscillator input, a first up-conversion, a second up-conversion, a first band-pass filter and a second band-pass filter, and is externally connected with a power supply and a transmitting antenna.
The FPGA comprises an internal control instruction, signal characteristics, data analysis, digital modulation and parameter configuration, the control data is input into the control instruction, a result processed by the control instruction is input into the data analysis, a result of the data analysis is output into the digital modulation, a signal characteristic parameter is input into the signal characteristics, a result generated after the signal characteristics are processed is input into the data analysis, a result of the data analysis is output into the parameter configuration, and results of the digital modulation and the parameter configuration are jointly output to the DDS for configuration.
The control data and the signal characteristic parameters are used as input of the FPGA, the output end of the FPGA is connected with the DDS, the clock input is used as the other group of input of the DDS, and the DDS respectively outputs two paths of intermediate frequency signals to the first up-conversion and the second up-conversion.
The first up-conversion is connected with the first local oscillator input, the second up-conversion is connected with the second local oscillator input, the first up-conversion outputs 5.8-5.9 GHz radio frequency signals to the first band-pass filter, the second up-conversion outputs 2.4-2.5 GHz radio frequency signals to the second band-pass filter, the first band-pass filter and the second band-pass filter are respectively output to the transmitting antenna, and the transmitting antenna transmits final output signals.
Furthermore, the control port of the FPGA is an RS232 serial port.
Further, the DDS of the selected type has the frequency resolution less than 1Hz and the capability of frequency hopping spread spectrum.
Furthermore, the two paths of intermediate frequency signals output by the DDS are both 100MHz intermediate frequency signals.
Further, the power supply adopts a 5V power supply, and the working current is 0.85A.
Further, the transmitting antenna is a directional antenna or an omni-directional antenna.
Further, DDS employs AD 9914.
The invention also provides a using method of the unmanned aerial vehicle remote control signal interference unit, which comprises the following steps:
s1, connecting the unmanned aerial vehicle remote control signal interference unit with a power supply and a transmitting antenna;
s2, powering on and starting up the equipment, and starting the equipment to work according to a preset mode;
s3, after the equipment is powered on, the FPGA loads a preset program and configures the DDS, and after the configuration is finished, the DDS outputs an intermediate frequency signal;
s4, after mixing the intermediate frequency signal with a local oscillator, converting the intermediate frequency signal into a radio frequency signal of 2.4-2.5 GHz, and transmitting the radio frequency signal by a transmitting antenna after band-pass filtering;
s5, if an unmanned aerial vehicle which needs to interfere with 5.8GHz transmits control data to the FPGA through the serial port, and the FPGA switches the radio frequency signal into a 5.8GHz frequency band. After mixing the intermediate frequency signal output by the DDS with a local oscillator, converting the intermediate frequency signal into a radio frequency signal of 5.8-5.9 GHz, and transmitting the radio frequency signal by a transmitting antenna after band-pass filtering;
so far, the interference of the unmanned aerial vehicle communication link is completed.
Furthermore, if the unmanned aerial vehicle in the designated direction needs to be interfered, the transmitting antenna selects a directional antenna, and the transmitting antenna is aligned to the target unmanned aerial vehicle after the mode is set.
Further, if need disturb all unmanned aerial vehicles in the certain limit, the transmitting antenna chooses for use omnidirectional antenna, sets for the mode after with unmanned aerial vehicle remote control signal interference ware setting in the central point that needs the interference range and puts.
The beneficial technical effects obtained by the invention are as follows:
in the prior art, a white noise signal is used as an interference signal, and a high-power transmitter is required for transmitting the white noise signal to interfere the unmanned aerial vehicle. Compared with the prior art, the technical scheme provided by the invention has the advantages of low equipment power, no need of a high-power transmitter, low cost, small volume and small radiation to users, and solves the problems in the prior art.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, and specific details such as specific system configurations, model numbers, technical parameters, etc., set forth in the following description are set forth merely to provide a better understanding of the present invention, and are not intended to limit the scope of the invention. In addition, those that should be known and understood by those skilled in the art will not be described in detail herein.
As shown in fig. 1, a specific embodiment of an unmanned aerial vehicle remote control signal jammer includes an FPGA, a DDS, a clock input, a first local oscillator input, a second local oscillator input, a first up-conversion, a second up-conversion, a first band-pass filter, a second band-pass filter, and an unmanned aerial vehicle remote control signal jammer external power supply and a transmitting antenna. The power supply in this specific embodiment adopts a 5V power supply, the working current is 0.85A, and the power consumption is low, so that the power supply using the power bank is supported, and the anode and the cathode of the power line can be led out according to actual needs, and other power supplies are used for supplying power. The transmitting antenna in this embodiment may be a directional antenna or an omnidirectional antenna, and is selected according to actual needs.
The FPGA comprises an internal control instruction, signal characteristics, data analysis, digital modulation and parameter configuration, the control data is input into the control instruction, a result processed by the control instruction is input into the data analysis, a result of the data analysis is output into the digital modulation, a signal characteristic parameter is input into the signal characteristics, a result generated after the signal characteristics are processed is input into the data analysis, a result of the data analysis is output into the parameter configuration, and results of the digital modulation and the parameter configuration are jointly output to the DDS for configuration.
The inherent flexibility of the FPGA enables the FPGA to flexibly design an internal configurable logic module according to index requirements, and when the built-in function needs to be changed, parameter binding can be carried out through an upper computer to change the function. In this embodiment, the control port of the FPGA is an RS232 serial port.
In this embodiment, the DDS is AD9914, it should be noted that other types may be used as long as the DDS with the type selection has a frequency resolution smaller than 1Hz and a frequency hopping spectrum spreading capability. Its purpose is in order to simulate unmanned aerial vehicle control signal and control cost.
The control data and the signal characteristic parameters are used as the input of the FPGA, the output end of the FPGA is connected with the DDS, the clock input is used as the other group of input of the DDS, the DDS respectively outputs two paths of intermediate frequency signals to the first up-conversion and the second up-conversion, in the embodiment, the two paths of intermediate frequency signals output by the DDS are both 100MHz intermediate frequency signals,
the first up-conversion is connected with the first local oscillator input, and the second up-conversion is connected with the second local oscillator input. The first up-conversion outputs 5.8-5.9 GHz radio frequency signals to a first band-pass filter, the second up-conversion outputs 2.4-2.5 GHz radio frequency signals to a second band-pass filter, the first band-pass filter and the second band-pass filter are respectively output to a transmitting antenna, and the transmitting antenna transmits final output signals.
The specific embodiment is carried out according to the following steps when in use:
and S1, connecting the unmanned aerial vehicle remote control signal interference unit with a power supply and a transmitting antenna.
And S2, powering on and starting the device to work according to the preset mode.
And S3, after the equipment is powered on, the FPGA loads a preset program and configures the DDS, and after the configuration is finished, the DDS outputs an intermediate frequency signal.
And S4, after mixing the intermediate frequency signal with the local oscillator, converting the intermediate frequency signal into a radio frequency signal of 2.4-2.5 GHz, and transmitting the radio frequency signal by a transmitting antenna after band-pass filtering.
S5, if an unmanned aerial vehicle which needs to interfere with 5.8GHz transmits control data to the FPGA through the serial port, and the FPGA switches the radio frequency signal into a 5.8GHz frequency band. After mixing the intermediate frequency signal output by the DDS with the local oscillator, the intermediate frequency signal is changed into a radio frequency signal of 5.8-5.9 GHz, and the radio frequency signal is transmitted by a transmitting antenna after being subjected to band-pass filtering.
So far, the interference of the unmanned aerial vehicle communication link is completed.
If need interfere the unmanned aerial vehicle of appointed direction, directional antenna is selected for use to the transmitting antenna, and it can to aim at target unmanned aerial vehicle with the transmitting antenna after setting for the mode. At the moment, the interference distance of the unmanned aerial vehicle remote control signal interference unit is long, but the coverage area of interference signals is narrow, so that the unmanned aerial vehicle remote control signal interference unit is suitable for occasions with definite targets.
If need disturb all unmanned aerial vehicles in the certain limit, the transmitting antenna chooses for use omnidirectional antenna, set for the mode after with unmanned aerial vehicle remote control signal interference ware setting need disturb the central point of scope put can. At the moment, the interference distance of the unmanned aerial vehicle remote control signal interference device is short, but the full coverage of the area can be realized, so that the unmanned aerial vehicle remote control signal interference device is suitable for occasions without definite targets but with definite or approximate ranges.
The beneficial technical effects obtained by the specific embodiment are as follows:
in the prior art, a white noise signal is used as an interference signal, and a high-power transmitter is required to be used for transmitting the white noise signal to interfere the unmanned aerial vehicle. Compared with the prior art, the device of the embodiment has low power, does not need a high-power transmitter, has low cost and small volume, has small radiation to users, and solves the problems in the prior art.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An unmanned aerial vehicle remote control signal interference unit is characterized by comprising an FPGA, a DDS, a clock input, a first local oscillator input, a second local oscillator input, a first up-conversion, a second up-conversion, a first band-pass filter and a second band-pass filter, wherein the unmanned aerial vehicle remote control signal interference unit is externally connected with a power supply and a transmitting antenna;
the FPGA comprises an internal control instruction, signal characteristics, data analysis, digital modulation and parameter configuration, the control data is input into the control instruction, a result processed by the control instruction is input into the data analysis, a result of the data analysis is output into the digital modulation, a signal characteristic parameter is input into the signal characteristics, a result generated after the signal characteristics are processed is input into the data analysis, a result of the data analysis is output into the parameter configuration, and results of the digital modulation and the parameter configuration are jointly output to the DDS for configuration;
the control data and the signal characteristic parameters are used as input of the FPGA, the output end of the FPGA is connected with the DDS, the clock input is used as the other group of input of the DDS, and the DDS respectively outputs two paths of intermediate frequency signals to the first up-conversion and the second up-conversion;
the first up-conversion is connected with the first local oscillator input, the second up-conversion is connected with the second local oscillator input, the first up-conversion outputs 5.8-5.9 GHz radio frequency signals to the first band-pass filter, the second up-conversion outputs 2.4-2.5 GHz radio frequency signals to the second band-pass filter, the first band-pass filter and the second band-pass filter are respectively output to the transmitting antenna, and the transmitting antenna transmits final output signals.
2. The unmanned aerial vehicle remote control signal jammer of claim 1, wherein the control port of the FPGA is an RS232 serial port.
3. The drone remote control signal jammer of claim 2, wherein the DDS of the selection has a frequency resolution less than 1Hz and a frequency hopping spread spectrum capability.
4. The unmanned aerial vehicle remote control signal jammer of claim 3, wherein the two intermediate frequency signals output by the DDS are both 100MHz intermediate frequency signals.
5. The unmanned aerial vehicle remote control signal jammer of claim 4, wherein the power supply is a 5V power supply, and the operating current is 0.85A.
6. The drone remote control signal jammer of claim 5, wherein the transmitting antenna is a directional antenna or an omni-directional antenna.
7. The unmanned aerial vehicle remote control signal jammer of claim 6, wherein the DDS employs AD 9914.
8. The use method of the unmanned aerial vehicle remote control signal interference unit is characterized in that the unmanned aerial vehicle remote control signal interference unit according to any one of claims 1-7 is adopted, and the method comprises the following steps:
s1, connecting the unmanned aerial vehicle remote control signal interference unit with a power supply and a transmitting antenna;
s2, powering on and starting up the equipment, and starting the equipment to work according to a preset mode;
s3, after the equipment is powered on, the FPGA loads a preset program and configures the DDS, and after the configuration is finished, the DDS outputs an intermediate frequency signal;
s4, after mixing the intermediate frequency signal with a local oscillator, converting the intermediate frequency signal into a radio frequency signal of 2.4-2.5 GHz, and transmitting the radio frequency signal by a transmitting antenna after band-pass filtering;
s5, if an unmanned aerial vehicle which needs to interfere with 5.8GHz transmits control data to the FPGA through the serial port, and the FPGA switches the radio frequency signal into a 5.8GHz frequency band. After mixing the intermediate frequency signal output by the DDS with a local oscillator, converting the intermediate frequency signal into a radio frequency signal of 5.8-5.9 GHz, and transmitting the radio frequency signal by a transmitting antenna after band-pass filtering;
so far, the interference of the unmanned aerial vehicle communication link is completed.
9. The method of claim 8, wherein if it is desired to interfere with a drone in a given direction, the transmitting antenna is a directional antenna, and the pattern is set to aim the transmitting antenna at the target drone.
10. The method of claim 8, wherein if all drones within a certain range need to be interfered, the transmitting antenna is an omnidirectional antenna, and the drone remote control signal jammer is set to the center of the range that needs to be interfered after the mode is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031171.0A CN112887051A (en) | 2021-01-11 | 2021-01-11 | Unmanned aerial vehicle remote control signal interference unit and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110031171.0A CN112887051A (en) | 2021-01-11 | 2021-01-11 | Unmanned aerial vehicle remote control signal interference unit and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112887051A true CN112887051A (en) | 2021-06-01 |
Family
ID=76047795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110031171.0A Pending CN112887051A (en) | 2021-01-11 | 2021-01-11 | Unmanned aerial vehicle remote control signal interference unit and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112887051A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567349A (en) * | 2022-04-28 | 2022-05-31 | 成都安则科技有限公司 | Radio interference signal transmitting system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008414A (en) * | 2017-12-29 | 2018-05-08 | 扬州宇安电子科技有限公司 | A kind of targeted electronic interference disposal intercepting system |
| CN108199802A (en) * | 2017-12-28 | 2018-06-22 | 陕西弘毅军民融合智能科技有限公司 | A kind of unmanned plane interference system and interference method based on electromagnetic interference |
| CN207835472U (en) * | 2017-12-28 | 2018-09-07 | 陕西弘毅军民融合智能科技有限公司 | A kind of unmanned plane interference system based on electromagnetic interference |
| CN109412744A (en) * | 2018-12-07 | 2019-03-01 | 北京和协导航科技有限公司 | A kind of comprehensive interference system of unmanned plane |
| CN109728872A (en) * | 2019-01-29 | 2019-05-07 | 西北工业大学 | A kind of unmanned plane interference system and method based on digital frequency memory technique |
| CN110058266A (en) * | 2019-04-26 | 2019-07-26 | 桂林电子科技大学 | The black winged unmanned plane fixed point induction fraud system of one kind and method |
| CN110247729A (en) * | 2019-07-18 | 2019-09-17 | 中电科仪器仪表有限公司 | A kind of unmanned plane real-time tracking and quick counter integral control system and method |
| CN110299958A (en) * | 2018-03-23 | 2019-10-01 | 北京振兴计量测试研究所 | Portable unmanned machine interference unit |
| CN212302252U (en) * | 2020-06-30 | 2021-01-05 | 西安幸福林微电子应用有限公司 | Full spectrum interference source of dexterous formula unmanned aerial vehicle produces system |
-
2021
- 2021-01-11 CN CN202110031171.0A patent/CN112887051A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199802A (en) * | 2017-12-28 | 2018-06-22 | 陕西弘毅军民融合智能科技有限公司 | A kind of unmanned plane interference system and interference method based on electromagnetic interference |
| CN207835472U (en) * | 2017-12-28 | 2018-09-07 | 陕西弘毅军民融合智能科技有限公司 | A kind of unmanned plane interference system based on electromagnetic interference |
| CN108008414A (en) * | 2017-12-29 | 2018-05-08 | 扬州宇安电子科技有限公司 | A kind of targeted electronic interference disposal intercepting system |
| CN110299958A (en) * | 2018-03-23 | 2019-10-01 | 北京振兴计量测试研究所 | Portable unmanned machine interference unit |
| CN109412744A (en) * | 2018-12-07 | 2019-03-01 | 北京和协导航科技有限公司 | A kind of comprehensive interference system of unmanned plane |
| CN109728872A (en) * | 2019-01-29 | 2019-05-07 | 西北工业大学 | A kind of unmanned plane interference system and method based on digital frequency memory technique |
| CN110058266A (en) * | 2019-04-26 | 2019-07-26 | 桂林电子科技大学 | The black winged unmanned plane fixed point induction fraud system of one kind and method |
| CN110247729A (en) * | 2019-07-18 | 2019-09-17 | 中电科仪器仪表有限公司 | A kind of unmanned plane real-time tracking and quick counter integral control system and method |
| CN212302252U (en) * | 2020-06-30 | 2021-01-05 | 西安幸福林微电子应用有限公司 | Full spectrum interference source of dexterous formula unmanned aerial vehicle produces system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114567349A (en) * | 2022-04-28 | 2022-05-31 | 成都安则科技有限公司 | Radio interference signal transmitting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105553499B (en) | A kind of radio-frequency front-end and mobile terminal of mobile terminal | |
| CN110045343B (en) | Broadband multi-path radar signal comprehensive simulation system and working method thereof | |
| CN106059598A (en) | Anti-harmonic interference device of carrier aggregation, antenna device and mobile terminal | |
| CN110429952A (en) | A kind of comprehensive radio-frequency system of Ku wave band | |
| CN102983880B (en) | A kind of WCDMA signal shielding system | |
| CN101860404B (en) | Radio monitoring and controlling system | |
| CN204993363U (en) | Unmanned aerial vehicle signal processing device | |
| CN106443731B (en) | Frequency spectrum dividing device and method in a kind of single-chip of multimode input and output | |
| CN109327275A (en) | A kind of multi-channel electromagnetic interference rifle of anti-remote controlled bomb and unmanned plane | |
| CN110233695A (en) | A kind of jamming equipment and its implementation of anti-unmanned plane | |
| CN102545946A (en) | Radio frequency front-end circuit | |
| CN112887051A (en) | Unmanned aerial vehicle remote control signal interference unit and use method thereof | |
| CN107359958B (en) | Frequency agility intelligence jammer | |
| CN110504984A (en) | A kind of electronic equipment | |
| CN105743831A (en) | Radio frequency processing method based on WIFI230mHz | |
| CN209046629U (en) | A kind of channel reception device based on millimeter wave | |
| CN207603634U (en) | A kind of data-link synthetical baseband plate number passes device | |
| CN109617564A (en) | A kind of high quality, fast frequency-hopped TDD wireless transceiver system | |
| CN102742167A (en) | Multi-band antenna feeder sharing method and base station radio unit | |
| CN202535367U (en) | A function-reconfigurable spectrum-managing jammer | |
| CN112260718B (en) | Ultra-wideband communication device and system | |
| CN108599890A (en) | Radio frequency interference device and signal generating method based on serial frequency sweep | |
| CN204795619U (en) | Network deployment device that radio signal blocked | |
| CN108566215A (en) | Ultra-wideband radio frequency spectrum managing and control system and its implementation | |
| CN208227040U (en) | Full frequency band seamless wireless electricity control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210601 |
|
| RJ01 | Rejection of invention patent application after publication |