The Design and simulation of low side lobe micro-strip array antenna at different frequencies
In this paper, we present a simple design of a feed network for the antenna to achieve a lower side lobe level. Side Lobe Levels (SLL) are critical issues in the detection of an object. Higher side lobe levels can increase the false detection of objects in an autonomous vehicle system. The array is designed and simulated for four different frequencies, one at a time to make it a scalable design. The chosen frequencies are 10 GHz, 15 GHz, 20 GHz, and 24 GHz. The feed network design consists of eight patch elements with an equal power divider. From simulation results, we measure that VSWR is equal to 1.26, 1.16, 1.62, and 1.05 at respective frequencies. So, the radiation efficiency can be achieved as -1.14dB, -0.92dB, -0.46dB, -0.41dB at respective frequencies. Also, the results demonstrate that this simple design can reduce the SLL more than -24.5dB in the elevation plane. The simulated gain is greater than 14.4 dB at all the above frequencies. For simulation work, CST studio simulation software is used.