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Antennas fabrication for RFID UHF and microwave passive tags

In this paper, the authors present several antenna structures for RFID passive tags with direct chip connection. In this study, the substrate is PET (Polyethylene terephthalate) with 80µm thickness, the conductive layer is copper with 10µm thickness and CST Microwave Studio is used for simulation. | TAP CHÍ PHAiT TRIElN KH CN TÁP 16 SOI K1- 2013 ANTENNAS FABRICATION FOR RFID UHF AND MICROWAVE PASSIVE TAGS Lil 1n I ÌAn I 1 t 2 Nffiivnn yzirtl n íi 2 I A ỉ 1 T I ím 111 1 1 r hỉim 1 Pham Tien lining Nguyen Viei non Ilan Nhan Al Lam lan PNai Dang Mau Chien 1 Laboratory for Nanotechnology VNU-HCM 2 University of Technology VNU-HCM Manuscript Received on April 5 . 2012 Manuscript Revised May 15th 2013 ABSTRACT In this paper the authors present several antenna structures for RFID passive tags with direct chip connection. In this study the substrate is PET Polyethylene terephthalate with 80pm thickness the conductive layer is copper with 10pm thickness and CST Microwave Studio is used for simulation. The antenna design process is described and related results are shown. The goal of this study is to achieve compact size good matching impedance and to increase the bandwidth and read range of the tag as much as possible. The prototypes were fabricated by sputtering technology with 1pm thickness then thickened by electroplating technique and finally tested by hand-held reader for read range characterizations. Keywords RFID UHF RFID tag dual-band antenna XRAG2 chip Atmel ATA5590 chip radiation pattern PET substrate. 1. INTRODUCTION RFID technology is a technology perfectly suited for our ubiquitous world. To get and retrieve information on an object tags are very useful. And they are particularly useful in the case of logistics. At the moment there is still a large use of barcodes but the line-of-sight reading causes various inconvenient in real environment. Nowaday RFID is more and more interesting and already used for some applications. This paper focuses on the antenna designs for RFID passive tag in UHF band and at 2.45 Ghz. In fact at the Laboratory for Nanotechnology LNT a platform for RFID research was established in order to perform studies on passive RFID tags and to realize some RFID system prototype based on the antenna design and RFID tags fabricated in our .