Microstrip antenna designs and electrical performance analysis of ceramics in different structures

Although microstrip patch antennas are small, light, convenient and inexpensive to manufacture, there are difficulties in obtaining electrical parameters such as resonance frequency, bandwidth, return loss, gain and efficiency. Especially at high frequencies, the dielectric property of the material used can change all the parameters of microstrip antennas and can greatly affect the antenna performance. In order to achieve the desired antenna performance in suitable physical conditions and structures, researchers are currently working on different materials and using optimization techniques for a high-performance antenna. In recent years, researchers have focused on ceramic materials due to their high bandwidth, high gain, and low return losses. One of the reasons for the increase in these studies is that the temperature values of ceramic materials are high, and they are durable. In this thesis, the performances of microstrip antenna structures on ceramic materials were evaluated, compared, and presented to the literature. The studies were carried out on a rectangular patch, and the patch and soil dimensions, especially the feed point location, were calculated using design equations and simulated and designed. The thicknesses of the designed and produced antennas were taken the same, they were made on five different ceramic materials and their performances were examined. All of the antennas designed, simulated, and manufactured with ceramic materials were operated at 2.4 GHz (Wi-Fi), 5.8 GHz (Wimax) and 10 GHz (X-Band) frequencies. Measurements of electrical parameters such as bandwidth, return loss, gain and standing wave ratio of the antennas produced by designing and simulating were made and compared with the simulation results. The results showed that ceramic materials can be used in bands that are used extensively in wireless communication such as Wi-Fi, Wimax and X-Band. Keywords: Ceramic, ISM band, X band, Wimax, Wi-Fi, gain.