A New Technique To Design Coating Structure For Energy Saving Glass Using The Genetic Algorithm

• Main Author: Azmin, Farah Ayuni
• Format: Thesis
• Language: English; English
• Published: 2017
• Subjects: Q Science (General); QA Mathematics
• Online Access: http://eprints.utem.edu.my/id/eprint/20560/1/A%20New%20Technique%20To%20Design%20Coating%20Structure%20For%20Energy%20Saving%20Glass%20Using%20The%20Genetic%20Algorithm.pdf; http://eprints.utem.edu.my/id/eprint/20560/2/A%20Software%20Requirements%20Defect%20Management%20Approach%20Using%20Negotiation%20Technique%20To%20Improve%20Software%20Requirements%20Quality.pdf; http://eprints.utem.edu.my/id/eprint/20560/; https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=106347

Energy saving glass is a specially coated glass with metallic-oxide coating that helps save energy by reflecting heat from the sun in the infrared region. Properties of an energy saving glass reflect the heat of infrared radiation while allowing visible white light to pass through the glass. Due to the presence of this metallic coating, some amount of useful radio frequency (RF) or microwave signals are attenuated. Magnitude for some wireless communication signals such as mobile phones (GSM, UMTS and 3G), global positioning system (GPS), wireless network (Wi-Fi), wireless broadband (WiMAX, LTE) are weaken. This limits the efficiency of the energy saving glass function in the wireless communication of microwave signals. In order to overcome this problem, currently there are three solutions; the first solution is to etch a structured design shape on the coated side of the glass, the second solution is by using different types of materials at the fabrication stage of energy saving glass process, and lastly, the common practice to address the signal attenuation is by employing numerous repeaters to improve signals. However, by changing materials during fabrication and having additional repeaters will incur extra cost through many aspects. Therefore this research focuses on the first solution that is to remove a portion of a structured design shape on the coated side of the glass. Currently, the shape is in the regular symmetrical forms such as square, triangle, circle, pentagon, rectangle, and octagon. This research proposed a modified regular shape which is based on the best selected regular shape, modified using genetic algorithm on the central processing unit (CPU). Genetic algorithm is a method which is easily transferred to the existing simulations and models. In order to evaluate the proposed approach, two different regular shapes are selected namely the Modified Single Square Loop (MSSL) and Single Square Loop (SSL). After modifying these shapes using the Genetic algorithm and Parallel Genetic algorithm, the outputs are simulated in the Computer Simulation Technology (CST) simulation software. Result shows that SSL with 10% coated part results -29.3044dB of return loss.