Title :
A near field small balanced antenna for Micro-RFID system utilized in mobile phones
Author :
Shen, Jianbing ; Shen, F.Z. ; Lv, Baolei ; Wang, Xiongfei ; Zhou, Fen ; Huangfu, J.T. ; Ran, L.X.
Author_Institution :
Department of Information and Electronics Engineering, Zhejiang University, Hangzhou, 310027, China
Abstract :
This paper presents a balanced small antenna matched with the RF chip CC2500. The antenna is confined in an area of 3mm∗11mm and the whole RFID system is printed on a microSD substrate. The produced microSD card is inserted into a mobile phone as a plug-in. The geometry of the antenna is optimized to obtain a specific radiation pattern, which ensures that the main power can be radiated out through the slot. Then we introduce a measurement method of the input impedance of a balanced antenna in experiments and the results show the error is below 5% under the restrictions.
Keywords :
Balanced antenna; Impedance calculation; Micro-RFID; Small size;
Conference_Titel :
Wireless Mobile and Computing (CCWMC 2009), IET International Communication Conference on
Conference_Location :
Shanghai, China
