Multi-sub-array antenna beam switching method based on maximization of power of receiving signal

Abstract

The invention discloses a multi-sub-array antenna beam switching method based on maximization of power of a receiving signal. The method comprises the following steps of 1, establishing an array factor directional diagram model of a multi-sub-array phased array antenna; 2, acquiring strength g (0, 0, alpha, f1) of the receiving signal of an array factor directional diagram of the sub-array phased array antennas in a target satellite direction, and then computing power of the receiving signal of the array factor; 3, establishing an optimization model maxS by taking the maximal power P (alpha, f1, L) of the receiving signal after compensation of a delay line as a target and using the length of each sub-array delay line as a variable, and thus acquiring the length Lq of each sub-array delay line and a corresponding elevation angle beta aiming a satellite when compensation is performed by the delay line; and 4, computing a value of an elevation angle [alpha]n of each partition node, and then implementing multi-sub-array antenna beam switching according to the length Lq of each sub-array delay line, the corresponding elevation angle beta aiming the satellite when compensation is performed by the delay line and the value of the elevation angle [alpha]n of the partition node. According to the method of the invention, a delay error is compensated by the delay line, occurrence of the problem that the power of the receiving signal of the antenna is reduced caused by frequency variation is inhibited, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of satellite communication system antenna beam control, and relates to a multi-subarray antenna beam switching method based on maximization of received signal power. Background technique [0002] With the progress of the times and the development of science and technology, satellite communication technology has been widely used in the military and civilian fields. Mobile satellite communication technology has become an effective means of broadband mobile communication. Areas such as delivery play an important role. [0003] Multi-subarray technology can effectively reduce the antenna height and system cost, while taking into account the antenna performance, and is currently the most commonly used method for low-profile antennas. When receiving satellite signals, multi-subarray phased array antennas often need to receive beacons and carriers at the same time, and the frequency gap between the two may be larg...

AI Technical Summary

Problems solved by technology

The phase shift value of the phase shifter has nothing to do with the signal frequency, and the change of the signal frequency will cause the antenna beam pointing to shift, which will lead to the decrease of the received signal power

The delay line, also known as the delayer, has the same characteristics as the group delay. When the real-time delayer is used to compensate the spatial wave path difference, although the antenna bandwidth can be effectively improved, the price is very expensive.

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