Study On CaCO₃ Mineral Filler Loading Effects Into SiR/CaCO₃ Based Composite As Dielectric Resonator For 5G Application

Zulkifli, Nor Syazana Adilah (2019) Study On CaCO₃ Mineral Filler Loading Effects Into SiR/CaCO₃ Based Composite As Dielectric Resonator For 5G Application. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This study was related to the composite application for dielectric resonator antenna. It was about the investigation of filler loading effects into rubber composite as dielectric resonator. Most of antennas were made of ceramic, which are good dielectric properties material. However, ceramic materials had a few limitations such as brittle, inflexible, low manufacturability and limited design form. The revolution of technology nowadays also enhances the development new generation in communication system like 5G application. Previous studies have been stated that some of the 5G specifications are not compatible to the ceramic antenna. For example, the ceramic antenna performed low gain and narrow bandwidth which are totally opposite the desired 5G characteristics properties. Therefore, the proposed idea of this project was making dielectric resonator from composite to counter these problems. This is because the combination of ceramic and rubber has better properties than ceramic itself. For example, the composite product from two roll open mill easier to design sample and more flexible form as it not brittle. There were three testing that conducted in this project to evaluate different weight percentage of filler into composite as dielectric resonator. The physical properties testing were set first based on the densitometer and ater absorption test. Then, two dielectric testing performed, which were surface resistivity and antenna testing in desire to analyse the performance of the dielectric resonator. After performed the tensile test, the sample observed by SEM to correlate the fracture surface morphologies with resulted DRA performance of composites. The density value, hardness and tensile strength of 50wt% calcite filled silicone rubber composite achieved the highest value, but lowest ability in water absorption. However, the 50wt% filler content composite also got good return loss and gain value at -21.061 and 9.630dB respectively, as it showed the best resistivity value as well. This proved that the silicone rubber was one of the best substrate material for ideal antenna performances.

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