The Design Of UHF Reader Test Platform Base On ARM9

RFID is an automatic identification technology that has been quickly developed since the eighties. Compared with other identification technology, RFID technology has a lot of advantages, such as easy to operate, large amount of stored data, good privacy, strong adaptation to the environment, identification distance, recognition speed and long life. RFID has been widely used in document management, highway charges, logistics management, product tracking, and other fields.The article introduces the principles and applications of RFID technology, UHF-band air interface EPC standard ISO18000-6B and UHF RFID technology related standards in China. The research highlights the system architecture of control module and RF module and researches processing tag power and anti-collision of UHF reader. Because of patent protection, the hardware platform of UHF reader can not be opened to the public. This article designs a UHF reader hardware platform of the test according to ISO18000-6 Type B-type agreement.Test platform used S3C2440 processor of ARM9 family as the control module .Apply Assembly language and C language to control the encoding and decoding, anti-collision algorithm and communication process through ADS1.2 development environment. Complete the interface design of host computer using VB6.0. In the RF module of test platform, application of Protel 99 SE software to complete the selected design of the chip peripheral circuits, complete the schematic design launch system and receiving system.Configure the system frequency synthesizer using Codeloader 4 software in order to output the appropriate local oscillator frequency. Finally, the research simulates and analyzes the Gain, receives power, outputs power, noises figure and matches network of RF module using circuit design and simulation software ADS 2009. The results can meet the system requirements under the provisions of 800/900MHz bands in China and achieve the main function of UHF reader test.