Research And Design Of Dual Broadband Wilkinson Power Divider

Radio Frequency Identification (RFID) is the product of the rapid development of modern information technology. RFID uses the coupling of energy of the RF to realize wireless and non-contact communication and reach automatic identification. Most importantly, RFID has developed a high technology in Information Technology area in recent years. As technology developing rapidly, more and more mature applications have been involved in all aspects of our daily life.The power divider is the key technologies and important component of RFID front-end. Wilkinson has well-design amplitude-phase characteristic and simple. It is also the important part in the microwave circuit design, such as power composition, antenna array and mixer. However, conditional Wilkinson only works in the special frequency or in the odd wave components. Now if the power divider can work in two or even more frequency at the same time, it will have a lot of advantages. Firstly, it can reduce the volume of the circuit. Then it can improve the performance by inserting load. Therefore, it is important to do research on double-frequency Wilkinson power divider, which is the power divider with academic value and practical value.In this paper,Ⅰwork as follow:(1) Do research on the theory of RFID and electromagnetic field.(2) Based on the theory of RFID, go on doing research on Wilkinson power divider. Then analyze the design structure of double-frequency and wide-band Wilkinson power divider in domestic and at abroad.(3) In this paper,Ⅰimprove the design of conditional Wilkinson power divider by utilizing odd-even analysis. This power divider is simulated with ADS and HFSS, and then its input port and output port are nice matches for the others. The performances are outstanding between 910M and 2.4G, and its insulation extent is under-20DB.