Tag antennas

Swedberg, C. 2005. Precisia launches flexwing tag antenna. RFID Journal. September 9. Accessed http //www.rfidjoumal.eom/article/artideview/1859/l/l/. 

Sangoi, R., Smith, C. G., et al. (2004), Printing radio frequency identification (RFID) tag antennas using inks containing silver dispersions, J. Dispersion Sci. Technol. 25(4), 513-521. 

Another potentially interesting application of OFETs is in low cost RFID tags and logic elements. If transistors, passive elements, and the tag antenna can be produced simultaneously using continuous printing processes, it is conceivable that economies similar to those achieved in paper printing can be achieved. 

Bhattacharyya R., Floerkemeier C., and Sarma S. 2009. Towards tag antenna based sensing An RFID displacement sensor. 2009 IEEE International Conference on Rf/D 95-102, Orlando, FL. 

This attributes defines the size ofthe tag antennae, for example, RJ-I16-114A-01 has an antennae of the following dimensions 24.2 mm -l-O.lmm/-0.2mm. 

RFID is the wireless noncontact use of radio-frequency electromagnetic fields to transfer electronic data. The performance and the feasibility of inkjet printed dipole RFID tag antennas have been experimentally studied (4). 

Shao, S., Kiourti, A., Burkholder, R., Volakis, J.L., 2014a. Flexible and stretchable UHFRFID tag antennas for automotive tire sensing. In Presented at the European Conference on Antennas and Propagation, Hague, The Netherlands, http //dx.doi.org/10.1109/ EuCAP.2014.6902434. 

Robertson H. M., Martos R., Sears C. R., Todres E. Z., Walden K. K. and Nardi J. B. (1999) Diversity of odourant binding proteins revealed by an expressed sequence tag project on male Manduca sexta moth antennae. Insect Mol. Biol. 8, 501-518. 

It is in the processing rooms that machines receive the tags that direct them to their final destinations. An antenna is placed on the battery crusher and quickly trimmed down to make a very special configuration the special shape of the trimmed antenna will tell other mechanisms to direct the crusher to the garbage treatment room. 

Ag thick film inks. printing antennas, and organics are being developed for printed TFTs for the active portion of the tag. 

Silicon-based RFID tags are widely available today, and are used in numerous applications ranging from asset management and inventory control to security and transit applications. In its simplest form, an RFID tag consists of a digital finite state machine driving a modem connected to an antenna. The antenna is responsible for uni- or bi-directional communication with a reader, as well as for providing power to the tag. 

The antenna in an RFID is typically implemented as a spiral inductor or as a dipole antenna, depending on the frequency of operation of the tag. This frequency of operation depends on the application, government-imposed standards, physical constraints, etc. The most common frequencies for operating RFID tags are <125 kHz (called the LF band), 13.56 MHz (called the HF band), 900 MHz (called the UHF band), and 2.4 GHz (called the microwave band). For various reasons, 125 kHz tags are not compatible with planar processing and thus will not be considered here. 

The antenna for the other frequencies is typically moderately large, covering an area of several cm square. As a result, in silicon-based RFID tags, the antenna is processed separately on a piece of plastic or paper, and then the silicon chip is mounted onto the antenna using an attachment process. 

Examining a typical RFID tag, several points of note are apparent. The first point is that the size of the tag is dominated by the antenna, which is printed at a relatively low resolution the size of the circuitry is a relatively small fraction of the overall tag size. The second point is that the cost scaling of silicon-based RFID is hmited by the cost of attaching the tiny silicon chip to the antenna thus, silicon-based RFID only benefits partially from cost reduction in the silicon microelectronics industry. The third point is that the transistor performance requirements for simple RF barcodes are not outrageous, and are potentially in the range of what is achievable using printed electronics. 

A third important application for printed electronics is the Radio Frequency Identification tag, or RFID-tag in short. This tag, the follow-up of the barcode, is a transponder, consisting of a small chip and an antenna. The antenna is... 

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