Low-profile one-dimensional active transceiving phased-array antenna for satellite communication in motion

Abstract

The invention discloses a low-profile one-dimensional active transceiving phased-array antenna for satellite communication in motion. The antenna comprises dual-linear-polarization antenna units in inclined and staggered arrangement, flat waveguide dual-channel feed networks, flat waveguide dual-channel miniaturized duplexers, waveguide transition and miniaturized TR components and miniaturized printed board power division networks. The units of the phased-array antenna are dual-linear-polarization waveguide radiators in triangularly inclined and rear-staggered arrangement, so that the antenna is low. By the aid of a method of sharing the same aperture for horizontal polarization and vertical polarization, aperture utilization efficiency of the antenna is increased, a flat waveguide feedback mode is adopted for both horizontal polarization and vertical polarization, loss of the feed networks is reduced, and quite high antenna efficiency is achieved. After passing through the antenna units, the feed networks and the duplexers, dual-polarization signals are subjected to polarization adjustment via polarization adjustment modules in the TR components and are synthesized via pitching surface networks so as to achieve a transceiving function of radio-frequency signals.

Description

technical field [0001] The technical fields involved in the design of the present invention include communication, electronic countermeasures, radar, remote sensing, etc., and have considerable application backgrounds. The invention is especially suitable for dual-polarization one-dimensional active phased array antennas in low profile satellite mobile communication, radar and other systems. Background technique [0002] At present, there are several types of mobile communication antennas used in communication systems. Although they have their own characteristics in terms of performance, they all have certain deficiencies. [0003] 1. Traditional reflector and shaped reflector antennas, this kind of antenna adopts mechanical tracking mode, the tracking speed is slow, and the pointing error is large during the high-speed movement of the carrier, and the volume and weight of the reflector are large, so it is inconvenient to install. Cannot be used as a phased array antenna. ...

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Problems solved by technology

[0003] 1. Traditional reflector and shaped reflector antennas, this kind of antenna adopts mechanical tracking mode, the tracking speed is slow, and the pointing error is large during the high-speed movement of the carrier, and the volume and weight of the reflector are large, so it is inconvenient to install. Cannot be used as a phased array antenna

[0004] 2. The dielectric lens antenna also often adopts the feed mechanical scanning method. Its weakness is also the slow tracking speed and large volume. The section is limited by the height of the dielectric sphere, and the insertion loss of the feed source and the dielectric sphere is large. , it is difficult to implement array control

[0005] 3. The scanning method of the planar array antenna is also mechanical, the aperture efficiency is low, the gain is not high, it is difficult to achieve a large bandwidth, and the tracking speed is slow

[0006] 4. Two-dimensional phased array antenna, the scanning method is electronic beam scanning, the scanning speed is fast, but the aperture efficiency is low, the cost is high, and the gain loss is large during two-dimensional scanning

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