A Phased Array Beam-to-Star Tracking System and Method Based on Broadband Frequency Hopping Signal

Abstract

The invention discloses a phased array beam-to-satellite tracking system and method based on broadband frequency hopping signals, belonging to the field of beam pointing and tracking of phased array antennas. The spatial incoming wave signal is received by the receiving sub-array unit, after the phase error caused by the instantaneous frequency hopping is compensated by the sub-array delay compensation unit, the beam signal synthesized by the beam forming network is synchronously de-hopped and frequency-converted by the frequency-hopping de-hopping unit, and sent to The beam tracking unit extracts the beam pointing error, and controls the receiving sub-array through the beam control unit to complete the closed-loop pointing tracking of the beam. The present invention simultaneously searches and captures in the space domain and the frequency domain, and quickly realizes beam-to-satellite tracking and frequency-hopping pattern synchronization; the designed subarray delay compensation and off-axis gain compensation technology can realize phase control in the application of frequency-hopping anti-jamming systems High-precision tracking of array beams; at the same time, fully utilizing the ability of fast scanning of phased array beams to realize beam deflection tracking, which greatly simplifies the complexity of equipment.

Description

technical field [0001] The invention belongs to the field of beam pointing and tracking of phased array antennas, and specifically relates to a phased array beam-to-satellite tracking system and method based on broadband frequency hopping signals in the field of satellite communications, and is especially suitable for high dynamic, Broadband, high-speed frequency hopping applications. Background technique [0002] Because of its small size, low loss, low profile, easy beam zeroing, beam forming, multi-beam, and quick adjustment of beam pointing, active phased array antennas have been used in satellite communication systems for more than ten years. Both the space segment and the user terminal are widely used. [0003] The angle measurement tracking of the phased array antenna beam usually adopts the single pulse tracking angle measurement method of sum, difference and difference three beams. The beam tracking scheme needs to add two separate difference beam channels, the fe...

AI Technical Summary

Problems solved by technology

At the same time, for the purpose of anti-jamming and anti-interception, the frequency-hopping communication system usually does not set up beacon signals for target acquisition and tracking; moreover, the satellite position drift caused by satellite tilt movement, the user terminal phased array antenna beam cannot be used To align the theoretical pointing angle with the satellite, there must be a scanning capture and closed-loop self-tracking system

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