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Compared to the array antennas with the same distance, those with different distances can improve the directivity and avoid occurrence of high minor-lobes. In this paper, GA is used to optimize the minor-lobes. During the progress, the minor-lobes level is defined as the fitness function. The first null direction is estimated properly so that the modified factor is used to avoid the complication of...
The paper presents the numerical study of 32-element phased-array antenna with 16-elements beam units along with 16 elements beam steering units. In the subsequent part deals with the working plan related with the radiating units and phase-shifter.
A broadband phased array based on intentionally introduce mutual coupling between the periodic elements is designed and presented in this paper. The design conception is fundamentally different from the design of the traditional broadband arrays. Simulated results and partially measured results show that the array can be used to obtain wideband impedance and pattern bandwidth.
A fast method of measurement of phased array antennas called phase-shift measurement method is introduced in this paper. Since the antennas under test and the probe are stationary, we only needed to control the phase of antennas element, the method is actually an electrical scanning approach substituting the traditional mechanical scanning. The simulation of the process is demonstrated here to illustrate...
The ldquominus beamrdquo steering of the phased arrays deviates from the given direction because of the quantization phase in the digital phased shifter. This paper studied the theory of wide-beam and ldquominus beamrdquo and investigated the model of the particle swarm optimization method on the arrayspsila beam steering, and modified the range of the position and speed factor by the principle of...
This paper presents a novel compact power divider with third harmonic suppression and also can provide a direct current (dc) path which could simplify the other active circuits, such as power amplifier, in the complicated phase array antenna feeding network area. The proposed power divider achieves 20% size reduction compared to the conventional Wilkinson power divider and it is beneficial to the...
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