This research presents a Wilkinson power divider using a common inductor. The lumped topology uses the inherently inductive loss of the inductor as a part of the design, so the conventional resistor for high isolation can be omitted. Therefore, low-loss and high-isolation performances of the compact circuit were achieved. The proposed 2.5-GHz divider was implemented on a silicon-based integrated passive device process. Measurement of the prototype chip had a reflection coefficient below 18 dB at all ports, an insertion loss of 0.5 dB and isolation above 28 dB. The chip size is merely 0.011 wavelength x 0.019 wavelength.
ตัวกระจายสัญญาณวิลกินสัน (WPD) ในรูปแบบวงจรรวมได้รับการศึกษาอย่างกว้างขวางในช่วงความถี่ไมโครเวฟและคลื่นมิลลิเมตร วงจรสายส่งแบบรวมถูกนำมาใช้แทนสายส่งแบบกระจายในการออกแบบตัวแบ่งกำลังไฟฟ้าความถี่เดียว แบนด์คู่ แบนด์กว้าง และแบนด์กว้างพิเศษ [1-12] วงจรสายส่งแบบรวมโดยทั่วไปจะอยู่ในรูปแบบของสายส่งแบบขวามือ (หรือแบบธรรมดา) แต่สายส่งแบบซ้ายมือและแบบผสมขวา/ซ้ายมือก็พบได้ในแอปพลิเคชันต่างๆ มากมายเช่นกัน [13] ในการวิจัยนี้ เราจะเสนอวิธีการออกแบบใหม่โดยใช้ตัวเหนี่ยวนำร่วมตัวเดียวเพื่อนำไปใช้กับตัวแบ่งกำลังไฟฟ้าวิลกินสันแบบกะทัดรัด ตัวต้านทานในตัวแบ่งกำลังไฟฟ้าวิลกินสันถูกละเว้น เนื่องจากการออกแบบใช้การสูญเสียโดยธรรมชาติของตัวเหนี่ยวนำ เพื่อลดกระบวนการปิดบังตัวต้านทานจึงสามารถลดได้ในการผลิตวงจรรวม มีการเพิ่มตัวเก็บประจุเพิ่มเติมเพื่อสร้างวงจรเรโซแนนซ์สำหรับการจับคู่ ดังนั้นแม้จะมีส่วนประกอบจำนวนน้อยและมีตัวเหนี่ยวนำคุณภาพต่ำ แต่วงจรดังกล่าวก็ยังมีประสิทธิภาพดีกว่าวงจรแบบเดิม
คณะวิทยาศาสตร์
Sugar production from sugarcane is a complex process that requires precise control. One of the major issues is sugar loss, which can result from various factors, particularly "burnt cane," before being sent to the mill. This affects the quality of the sugarcane and the efficiency of sugar extraction, along with the performance of the machinery and the properties of the cane, which impact the amount of sugar extracted. This study aims to analyze the factors that influence sugar loss in the sugar production process, using quantitative data from a sugar factory. Nine variables were examined, including mechanical efficiency, machine downtime per day, cane waiting time per day, sand content in cane juice, pol extraction efficiency, overall working time efficiency, cane juice purity, cane sugar content (C.C.S.), and burnt cane. The data were analyzed using correlation analysis to examine relationships between variables and regression modeling to predict sugar loss. The results showed that mechanical efficiency, cane sugar content, and the amount of sand or impurities in the cane juice were significantly correlated with sugar loss. Mechanical efficiency had a direct relationship with the amount of cane milled, which improved sugar production. On the other hand, burnt cane, or cane that was burnt before harvesting, resulted in reduced sugar extraction and impacted the quality of the sugar. Therefore, reducing sugar loss in the production process can be achieved by improving machine efficiency, reducing impurities in cane juice, and managing burnt cane, which will improve sugar production efficiency in the future.
วิทยาเขตชุมพรเขตรอุดมศักดิ์
Study on Parasites in Blackchin Tilapia and Value-Added Processing Parasites play a crucial role in affecting fish health and the balance of marine ecosystems. The study of parasites in fish is essential for assessing fish population status and their impact on the ecosystem. This research focuses on a preliminary survey of parasites in Blackchin Tilapia (Sarotherodon melanotheron) found in the waters of Chumphon Province to determine whether this species carries parasitic infections. The findings will provide valuable insights for managing marine resources and developing strategies for processing Blackchin Tilapia into food products to help control its population in the ecosystem. One of the value-added processing approaches for Blackchin Tilapia is the "Nai Hoi Hua Fu" product. This product involves deep-frying the fish to achieve a crispy and fluffy texture before mixing it with mango salad to enhance its flavor and make it more appealing. This processing method not only adds value to the fish but also serves as a practical solution for managing the Blackchin Tilapia population, which may impact the ecosystem. The study results indicate that no parasitic infections were found in either the internal or external organs of the sampled fish, suggesting that the marine environment in the study area is favorable for fish health. However, continuous research is recommended to monitor long-term ecological changes and evaluate the impact of Blackchin Tilapia on ecosystem balance to ensure sustainable resource management.
คณะสถาปัตยกรรม ศิลปะและการออกแบบ
The concept for this work came from my curiosity about what would happen if, during interdimensional travel in space, a teleportation system were used. This system involves removing matter from one point and transferring it to another while maintaining its original state. If an error occurs and the matter is recreated or fused together, it could result in an experimental creature merging with the spacecraft. I choose the tardigrade as the first experimental subject for teleportation because the water bear has already been sent into space and survived. Therefore, I thought that if we were to actually test this teleportation system, the tardigrade would likely be one of the creatures chosen for experimentation.