tailieunhanh - Radio Frequency Identification Fundamentals and Applications, Design Methods and Solutions Part 10

Tham khảo tài liệu 'radio frequency identification fundamentals and applications, design methods and solutions part 10', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 216 Radio Frequency Identification Fundamentals and Applications Design Methods and Solutions solution found is the optimum available because the parameter space for optimisation and analysis is large multidimensional and heterogeneous. A first system success design approach based on software tools for system analysis and optimisation including automatic parameter variation and model generation seems to be more sufficient. Important questions like if a specific application would work using RFID technique or how to dimension and position antennas can be answered qualitatively and quantitatively on virtual level without doing prototyping. This design approach could be less time consuming and expensive as well as provide better results to work with. 2. System modelling Transponder system Transponder systems consist of different modules strongly dependent on application. The tag comprises for example a RF front end a protocol stack with different complexity and different features a state machine or a microcontroller memory like EEPROM RAM and flash or an analogue or digital interface to connect different actuators and sensors. Fig. 1. Block diagram of a whole transponder system including reader and tag On reader side there is also a RF front end a protocol stack and an application programming interface API to connect it to a computer or a middle ware. Furthermore there are the antennas for both reader and tag ideally customised for each application. In general the goal of system design is to ensure a requested functionality on a specified link distance. On RFID level that means transferring enough energy from reader to tag wirelessly and to ensure an uni- or bidirectional wireless data communication. Hence two objective functions energy range and transponder signal range Finkenzeller 2007 can be derived. Energy range stands for a maximum distance where the tag gets enough energy from the field generated by the reader. And transponder signal range means a .