A Synthetic Aperture Thermal Antenna Feed System Adapting to Large Attitude Changes

Abstract

A synthetic aperture thermal antenna feed system adaptable to large attitude changes, consisting of two synthetic aperture thermal antenna feed antennas and antenna controllers, the synthetic aperture thermal antenna feed antennas are installed on the aircraft relative to each other up and down. The integrated aperture thermal antenna feeder adopts the design form of multi-band conformal cooling and heating integrated phased array. The multi-band antenna is embedded in the phased array array in layers. A single integrated aperture thermal antenna can complete Ka / Ku, S / C , L-band signal transmission and reception. The phased array surface layer of the synthetic aperture thermal antenna feed antenna is integrated with the antenna heat shield. By adjusting the phased array antenna parameters, the amplitude and phase of the antenna can be corrected. The antenna controller obtains the angle and distance between the aircraft and the target according to the position and attitude information of the aircraft, dynamically adjusts the number of transmitting and receiving elements of the synthetic aperture thermal antenna feed antenna, and selects the synthetic aperture thermal antenna feed antenna suitable for communication according to the angle information And complete the beam steering.

Description

technical field [0001] The invention relates to a synthetic aperture thermal antenna feed system adaptable to large attitude changes, and belongs to the technical field of space smart antenna communication. Background technique [0002] With the rapid development of aerospace technology, the requirements for the coverage area and signal quality of the aircraft measurement and control communication system are getting higher and higher. In recent years, the demand for low-cost, miniaturized, recyclable and returnable aircraft platforms has become increasingly urgent, and higher technical requirements have been put forward for the miniaturization, conformal, integrated, and intelligent design of the antenna system. [0003] Therefore, compared with the traditional aircraft, the intelligent antenna feed system not only needs to solve the problem of high code rate satellite-ground and inter-satellite communication in multiple frequency bands, but also needs to solve the alignment...

AI Technical Summary

Problems solved by technology

[0010] However, the above two schemes for improving the communication code rate and beam coverage have limitations.

For an antenna with a servo mechanism, the servo mechanism required for antenna rotation is relatively large, which requires strict attitude control stability of the aircraft platform, and the antenna needs to be put into the cabin when the aircraft returns, occupying the space of the payload, which is not possible for small aircraft. Using this antenna feeder design form

[0011] For general phased array antennas, the transmission frequency band is relatively single, and multiple antennas are also required to achieve multi-band transmission, and the system weight and power consumption are relatively large.

The beam coverage is limited, once the beam range is exceeded, the communication link cannot be established

For some specific aircraft, according to the working characteristics of the load, the aircraft will maintain an attitude roll of more than 180° for a long time when the load is working. At the same time, the real-time requirements for measurement and control communication are very high. The antenna feed design used by general satellites cannot meet the requirements.

Images