Low Cost Automotive Phased Array Antenna Tracking Technology Of On-The-Move

With the evolution of satellite communication techniques, satellite communication in motion has already been a good instrument in mobile communication. More and more military and civil devices fit satellite communication antenna to achieve remote and uninterrupted communication with earth surface. Especially in modern war, terminal of satellite communication was pressed for possessing fine flexibility.The study on satellite communication in motion bases on panel antenna in this paper. Firstly,basic concepts、long term potential、difficulty and key questions in studying on satellite communication in motion was elaborated. Aiming at the key question of direction and track of satellite communication in motion, a correcting error compensation process basing on vector is presentated in order to account for quantization error of digital phase shifter, and then the digital phase shifer can feed back phase in regular pattern to achieve the goal of stability direction. It has been stated that this method can let antenna to achieve upper pointing accuracy.In the beginning, we can use the mechanical servo, which drives the electrical machine to adjust the pointing direction, in order to accomplish the initial aiming of the antenna. We research deeply in the track of satellite communication in motion. In this thesis, we propose the simultaneous perturbation stochastic gradient estimation algorithm. The simultaneous perturbation stochastic gradient estimation algorithm searches the optimum phase shift values of the phase shifters to produce a beam pointing to the direction of arrival signal. All phase shifters are perturbed simultaneously and all phase shift values are adjusted in one iteration to improve the convergence rate. The numerical simulation demonstrates the performance of the algorithm.Aiming at the polarization mismatching of the satellite communication in motion, this paper designs the structure of feed network and gives a novel method for adaptive polarization control. We utilize orthogonal polarization antenna which combines corresponding feed network to accomplish any direction line polarized wave. It uses in the antenna polarization tracking for mobile condition. The polarization track network uses digital phase shifter, which results in the ultimate combined power decends in different degrees. In this case we performed simulation experiment and the results were analyzed Ultimately, the review is presented.