Design and simulation of microstrip antenna with double-band circular patch for marine applications

In this article, the design and simulation of the dual-band microstrip antenna with two circular band polarizations with a compressed structure and suitable bandwidth as well as circular polarization capability have been attempted. The proposed antenna is due to having circular polarization with suitable bandwidth and very low VSWR, which shows that the impedance matching is very good for marine applications in which the interference of sea waves with electromagnetic waves is very high, and the issues of multi-paths and reflection of waves from the sea and ocean and Even large lakes (Caspian Lake) can be very effective. In addition, to increase the bandwidth and axial ratio of the antenna as much as possible, an incomplete ground structure is used, which provides better bandwidth and axial ratio values to the user by reducing the structure. By examining the results of the proposed antenna, it can be recognized that the right-round pattern has more amplitudes than the left-round pattern in the direction of zero degrees, so the desired antenna has right-round circular polarization. Also, according to the radiation pattern, reducing the surface of the secondary petals and achieving a suitable level of radiation is one of the advantages of the proposed antenna. It is necessary to point out that the axial ratio of 0.8 and the appropriate bandwidth of the proposed antenna are helpful and helpful in overcoming fading and interference. It is multi-path. 3.5 GHz frequency which is used for weather radar, and surface ship radar, and 10 GHz working frequency which is used for communication systems for air traffic control, and sea ship traffic control. The results of the simulated antenna show that the proposed antenna has a right-handed circular polarization, which means that the proposed antenna can be practical and effective in marine communication.