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This study is conducted in order to measure and identify the ability of a bio-composite material to the high voltage. According to it, the developed bio-composite material is tested to ensure the maximum voltage that the material can hold. The bio-composite material which made from a mixture of Bambusa Vulgaris and a selected polymer named as High Density Polyethylene (HDPE). The Bambusa Vulgarisis going through several processes before mixed together with HDPE using wood plastic composite (WPC) technique which also consists of several stages. There are several samples of bio-composite substance are fabricated. The difference among them is the composition of the raw materials (Bambusa Vulgaris and HDPE) used. In this research, the high voltage measurement which also called as breakdown voltage measurement of the bio-composite material is examined by using appropriate experiments. All the experimental results are presented and discussed in this paper.

This paper presents a frequency reconfigurable quasiYagi microstrip antenna with beam shaping for WiMAX application by using a folded dipole as a driven element. The reconfigurability of this antenna can be achieved by varying length of driven element. The usage of PIN diodes which act as switches will help to vary the length of driven element. This microstrip antenna has use quarter-wave matched T-junction power divider to match the impedances between feed line and driven element. Furthermore, this quasi-Yagi microstrip antenna was originally designed using CST Microwave Studio for operation in 5.8GHz frequency band. However, by changing the driven element length, this quasi-Yagi microstrip antenna can operate at differ frequency and differ directions. In addition, this reconfigurable quasi-Yagi microstrip antenna with switching has been fabricated and experimental results are provided in this paper.

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