Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
This paper proposes fabrication and measurement of microstrip antenna with circular polarization for microwave radio communication at range frequency of 10750 – 10950 MHz. Circular polarization with axial ratio ≤ 3 dB obtained by using truncated corner technique while gain of proposed antenna improved using plannar array with 8 element. The proposed antenna is designed and fabricated using Arlon LX 217 with dielectric constant of 2.2, thickness of 0.787 mm and loss tangent 0.0009. From the measurement process, proposed antenna obtained return loss of -12.92 dB and VSWR of 1.58 at working frequeny of 10850 MHz. Bandwidth of proposed antenna is 1500 MHz with range frequency of 9850 MHz – 11150 MHz. Circular polarization of proposed antenna has been showed with axial ratio of 1.468 dB with gain of 11.56 dB. Based on the results obtained from the fabrication process, the proposed antenna has worked in accordance with the specified working frequency and is suitable for microwave radio communication
The magnesium and magnesium alloys demand in several industries currently in Viet Nam becomes increasingly huge. The domestic consumption has promoted the development in researching the magnesium regional. In the world, the magnesium generating procedures are commonly known as Dow, Mintek, Magnetherm, Pidgeon. Among them Pidgeon tends to be the most popular one because of the convenience in the practical field, less requirement in the high quality workforce and low expenses. There is no factory in Viet Nam producing the magnesium, however, the diversity raw materials like magnesite and dolomite are strong foundation for Viet Nam to be independent in making magnesium. This study focuses on rating the magnesium producing process from dolomite ore in Thanh Hoa – Vietnam by Pidgeon while Chinese ferrosilicon is used as reducing agent. The crucial factors have impact on the recovering procedure including the reductant rate, recovering temperature, recovering period. The chemical and mineralogical analyse of Thanh Hoa dolomite has indicated that this kind of mineral is suitable for silicon thermal process to produce magnesium. The rate of calcium oxide and magnesium oxide after heating are 0.37, 0.54, respectively. A computing model using FacSage software has been applied to estimate the ability of magnesium recovery from Thanh Hoa dolomite. The result has predicted that recovery efficiency and the magnesium purity is extremely high. However, the result form the vacuum furnace in a range of temperature from 1000oC to 1300oC is lower than the one in the model. The test resultant has indicated when the rate of ferrosilicon go up 0.2 to 0.3 comparing to dolomite, the highest process productivity will be 0.84 getting with the volume of ferrosilicon 0.3.
