Research Design And Practical Application Of A C Band Stripline Directional Coupler

Directional coupler is a kind of microwave network element with four ports, which has the characteristics of directional coupling. It can be used in the modern microwave communication system. Through the application of directional coupler, it can be easily and quickly to get a little of important parameters of the system, so as to determine the working state of the system. The strip line directional coupler has the characteristics of a variety of directional couplers, which have good direction, small size and easy integration. Therefore, it has great value to study the application value of the strip line directional coupler.Directional coupling is the most important technical index and the research emphasis of the research. It is very important for the research of the directional coupler and the research of the directional coupler. To ensure the stripline directional coupler at the same time, how to design the subsequent detection circuits, digital circuits and the program algorithm of power detection and VSWR is emphasis and difficulty in this paper. The main research content of this paper as follows:1、The structure size of the designed stripline directional coupler meets requirements. The designed directional coupler is accurate for power detection within the bandwidth for the transmitterr, at each frequency point in the range of 20 dB power detection error within±1dB.It is realized the function of stripline directional coupler power detection.2、The detection standing wave ratio of stripline directional coupler to the antenna feed line is accurate, in connection to the normal transmitter system within the designed bandwidth. The coupler can detect the standing wave ratio alarm and protect the transmitter effectively, via a serial port issue instructions off transmitter power, when the antenna feed line under the condition of open circuit.The application prospect of the strip line directional coupler is very wide, and it is an important part of many RF microwave systems. With the development of wireless communication, it will stimulate the development of the strip line directional coupler. The development of material technology, the development of precision machining technology and the continuous progress of advanced computer simulation software will be the main direction of the development and progress of the strip line directional coupler. The development of directional coupler is bound to affect the development of RF microwave related industry in the future. It will improve people’s life style and will make contribution to the society.