What is a conductive electromagnetic wave absorber? What is the measurement method for thin film wave suppression sheets? What is the design of electromagnetic wave absorbers for wireless LAN?
【Speaker】 Professor Takashi Yamamoto, Ph.D., Department of Communications Engineering, National Defense Medical College 【Venue】 Kawasaki City Industrial Promotion Hall, Conference Room 1 【Kanagawa, Kawasaki Station】 【Date and Time】 September 29, 2010 (Wednesday) 12:30 PM - 4:15 PM 【Free Time Q&A from 4:15 PM to 4:45 PM】 【Lecture Overview】 Applications utilizing high-frequency wireless technology, such as mobile phones, wireless LAN, ETC, high-speed image transmission HDMI, and ITS, are rapidly expanding, and radio wave interference has become a problem. This introductory course is aimed at those who want to use radio wave absorbers in these applications and those who wish to gain a deeper understanding of radio wave absorbers. We will explain how to create radio wave absorbers, how to effectively utilize them, and how to enhance their functionality, covering everything from the basics to applications.
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◆Examples of Applications for Electromagnetic Wave Absorbers Q: What is the origin of electromagnetic wave absorbers? Q: What is TV ghosting? Q: What are radar artifacts? Q: What is wireless LAN? Q: What is ETC (Electronic Toll Collection System) on highways? Q: What is ITS (Intelligent Transportation System) and collision prevention mechanisms? Q: What is power line communication (PLC)? Q: What is an electromagnetic wave absorber used to prevent automatic ticket gate malfunctions? Q: Where are electromagnetic wave absorbers used in mobile phones? Q: What is a large electromagnetic wave anechoic chamber that protects the electromagnetic environment? ◆What is Electromagnetic Wave Absorption? Q: How do materials absorb electromagnetic waves? Q: What is the difference between electromagnetic wave absorption and electromagnetic shielding? Q: What is a conductive electromagnetic wave absorber? ◆What is the design of electromagnetic wave absorbers used in space (far field, near field)? Q: How are material constants measured? Using the coaxial waveguide method (400MHz to 23GHz) as an example.
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Applications/Examples of results
◆What is the design of wave absorbers for ETC? (Far field) ◆What are wave absorbers for ETC aimed at achieving higher performance? (Using metal patterns) ◆What is the design of wave absorbers for wireless LAN? Q: Does wireless LAN use two frequencies, 2.45GHz and 5.2GHz? Q: How do you design a dual-band wave absorber (absorbing electromagnetic waves at two frequencies)? Q: How do you create a wave absorber for wireless LAN (absorbing waves at 2.45GHz and 5.2GHz)? Q: Can a wireless LAN absorber be made according to the design? Q: Can a dual-band wave absorber be applied to an ETC wave absorber (5.8GHz)? It can be made thinner and lighter. ◆Everything about thin film sheet wave suppressors? 【Free time Q&A after the lecture (16:15-16:45)】
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