Phased array circular array antenna system

Abstract

The invention discloses a phased array circular array antenna system which comprises a circular array antenna. The circular array antenna comprises a circular metal reflector and an antenna unit fixedon the circular metal reflector. Multiple antenna unit groups are distributed along the circumference of the circular metal reflector. A row of antenna elements in the horizontal direction of the circular array antenna is connected to different RF switches according to a certain order, output ends of all RF switch in a row are connected the same secondary power splitter, and an output end of thesecondary power splitter is connected to a phase shifter to form a horizontal antenna array. According to the invention, the non-mechanical signal search and tracking is realized, the directional diagram scanning and tracking of 360 degrees in a horizontal direction and 90 degrees in a vertical direction are carried out on a signal in movement, the search and tracking of the signal are achieved through electric scanning, the reliability is good, the capture time of an electric scanning signal can be calculated in milliseconds, a beam can be changed, different directions can be pointed in scanning and tracking, and complex networking such as relaying can be achieved.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a phased array circular array antenna system. Background technique [0002] With the rapid development of wireless communication systems and satellite technology, mobile communication antenna systems are more and more widely used, such as mobile satellite TV receiving antennas, mobile satellite broadband receiving antennas, wireless signal detection and automatic tracking antennas, etc. The antennas used in these scenarios need to be directional, and the antenna beams have tracking capabilities. [0003] It is impossible to set up mobile communication base stations at sea, and its communication mainly depends on satellites and short-wave radio stations. The frequency of the short-wave radio station is low, and it can realize the communication of more than 100 kilometers without the need for a relay. The antenna uses an ordinary omnidirectional antenna, but the bandwidth of the short-wave...

AI Technical Summary

Problems solved by technology

[0007] Regardless of whether the antenna in motion based on a parabolic antenna or the antenna in motion based on a flat panel array antenna requires a servo system to drive the antenna to search and track signals, since the servo system requires a servo motor (stepping motor), a synchronous wheel and a synchronous belt Structural parts, such as many wear failures in long-term operation, poor reliability

At the same time, parabolic antennas and flat panel array antennas have fixed beams, making it difficult to achieve multi-wave speed or multi-polarization work, which restricts the work of complex systems, such as the inability to realize self-organizing networks, etc.

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