Development of NFC Antennas Mounted on Metal Casing of Mobile Communication Devices

• Main Authors: Pai-Fu Hsiao, 蕭百富
• Other Authors: Hua-Ming Chen
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/5yg698

碩士 === 國立高雄應用科技大學 === 光電與通訊工程研究所 === 102 === The objective of this thesis focuses on development of NFC antennas mounted on metal casing of mobile communication devices, including two NFC antennas operated at 13.56 MHz in chapter 2 and 3. The NFC antenna design is based on the small loop antenna, which is less one-wavelength parameter and with uniform magnetic field distributions. Two loop antennas with single and double surface are performed impendence matching with Taipei Easycard’s chip (MF1s50yyx). Both antennas are successfully detected for mounting on metal casing. By cutting a slit on metal casing can decrease the eddy current on the metal, and the maximum read range is about 35 mm by using the RFID HF reader module. In chapter 4, we use multi-coils resonance systems to achieve coupling magnetic resonance. This method successfully improves near-field transmission efficiency and obtains the maximum read range up to 39 mm.