tailieunhanh - Báo cáo " Research, design and fabrication of a high-power combiner using Wilkinson bridge of L-band "

In this paper, we are dealing with a L-band power combiner method using the Wilkinson bridge. This is a modern power combination technique in the microwave technology. The design and simulink of the basic power moduls and Wilkinson bridge were performed using the ADS soflware. We have researched, designed and fabricated the power combination from the basic 200W moduls. The experimental results showed that power combination method using the Wilkinson bridge may be applicable in the L-band transmission | VNU Journal of Science Mathematics - Physics 25 2009 185-189 Research design and fabrication of a high-power combiner using Wilkinson bridge of L-band Dang Thi Thanh Thuy1 Vu Tuan Anh2 Vu Duy Thong3 Bach Gia Duong2 1 Faculty of Physics College of Science Vietnam National University Hanoi 2Research Center Electronics and Telecommunication College of Technology VNU 3 Department of Science and Technology Ministry of Defense Hanoi Vietnam Received 24 June 2009 Abstract. In this paper we are dealing with a L-band power combiner method using the Wilkinson bridge. This is a modern power combination technique in the microwave technology. The design and simulink of the basic power moduls and Wilkinson bridge were performed using the ADS soflware. We have researched designed and fabricated the power combination from the basic 200W moduls. The experimental results showed that power combination method using the Wilkinson bridge may be applicable in the L-band transmission. Keyword Microware Wilkinson power combination. 1. Introduction The assemble of the L-band high-power amplifier is usually difficult therefore the search for the power combination methods is important. The power combination method using the Wilkinson bridge is one of methods that have been taken into account. We have studied and aplied this method for combining power from the basic modules. Wilkinson power divider was proposed by E. J. Wilkinson 1 as a method of distributing power to attain equiphase and equiamplitude condition. 2. Theories The Wilkinson power divider can use as combiner or divider. It is a simple power divider cannot simultaneously have all the properties of lossless reciprocal and matched. Hence the Wilkinson power divider was developed. Here an isolation resistor is placed between the output ports to help achieve the properties. Dissipation of energy occurs only in isolation resistor when signal enters the network from any output port. However it should not affect Wilkinson network .