A method for synthesizing omnidirectional pattern based on tcas directional antenna transmit beam steering
A technology of directional antenna and beam transmission, which is applied in the field of air traffic control, can solve the problems of heavy workload, complicated operation, and unsatisfactory omnidirectional pattern, and achieve the effect of reducing maintenance cost and simple operation
Active Publication Date: 2022-07-19
四川九洲空管科技有限责任公司
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Problems solved by technology
Due to the aging of the equipment after the equipment is installed, the replacement of the antenna may cause changes in the amplitude and phase characteristics of the four channels, resulting in the use of directional antennas for four bursts to transmit the omnidirectional pattern of space synthesis at the same time. Therefore, it is necessary to regularly check the radio frequency of the directional antenna The channel performs amplitude and phase calibration to ensure the response distance within 360°
[0005] The currently commonly used field calibration method requires professional field measurement equipment, which is complicated to operate, heavy workload, and requires high professional knowledge of maintenance personnel, which is not conducive to product maintenance
Method used
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Effect test
Embodiment
[0053] This embodiment proposes a method for synthesizing an omnidirectional pattern based on TCAS directional antenna transmit beam steering. Channel, J2 channel, J3 channel and J4 channel are used for transmitting and receiving test, and the amplitude and phase information of the four channels of the directional antenna are calculated from the test data, so as to realize the monitoring function of the directional antenna, and then the directional antenna is calibrated according to the ideal distribution. Specifically include:
[0054] Step 1, start the antenna connection status self-check, if the J1 channel, J2 channel, J3 channel and J4 channel in the directional antenna are connected normally, go to Step 4, otherwise go to Step 2;
[0055] Step 2, the number of abnormal antenna connection times errCount is incremented by 1, that is, errCount+1, wait for 1 second, and go to step 3;
[0056] Step 3, if the abnormal number of antenna connections errCount is greater than 10 t...
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The present invention provides a method for synthesizing an omnidirectional pattern based on TCAS directional antenna transmit beam control. The four channels of J2, J3, and J4 are tested for transceiver, and the amplitude and phase information of the four channels of the directional antenna are calculated from the test data, so as to realize the monitoring function of the directional antenna, and then the directional antenna is calibrated according to the ideal distribution. By this method, after the equipment is installed, in the absence of a microwave anechoic chamber or unsatisfactory external field conditions, the amplitude and phase calibration of the directional antenna transmitting ATC response radio frequency channel can be performed automatically. After the device is powered on, it can automatically identify the channel connection status without manual intervention, and automatically start the directional antenna amplitude and phase calibration after confirming the status. No additional external field measurement and calibration device is required, and the operation is simple. requirements, reducing the later maintenance costs after the equipment is installed.
Description
technical field [0001] The present invention relates to the technical field of air traffic control, in particular, to a method for synthesizing omnidirectional patterns based on TCAS directional antenna transmit beam control. Background technique [0002] Airborne Collision Avoidance System (ie ACAS-Airborne Collision Avoidance System, also known as TCAS-Traffic Alert and Collision Avoidance System) is defined by the United States Federal Aviation Administration (FAA). Traffic Alert (TA) and Decision Alert (RA). TCAS is an essential device for preventing dangerous approaches and collisions of aerial aircraft, and can work independently of the ground traffic control system. It is mainly used to provide air safety separation guarantee for aircraft. The system uses secondary radar to detect approaching aircraft in the nearby airspace, and when necessary, reminds the pilot to take evasive measures to maintain an appropriate safety distance from other aircraft to achieve the pur...
Claims
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IPC IPC(8): G01S7/02
CPCG01S7/02
Inventor 付红胡勇李涛刘刚
Owner 四川九洲空管科技有限责任公司