A Design Method of Miniaturized High Directional Microstrip Coupler
Coupler is one of the essential components in wireless mobile communication system.The size of microstrip coupler designed by classical coupler theory will change with frequency,about a quarter wave-length.Its directionality index is generally poor,only about 5 dB in the simulation in this paper.By changing the structure of the microstrip coupling line,the directionality index can exceed 20 dB while ensuring the stand-ing wave performance of the port.In this paper,the factors affecting the size and directivity of the coupler are analyzed theoretically,and a design method of a small size and high directivity microstrip coupler is proposed.HFSS is used to analyze the model and the actual production verifies its expected effect.
万方数据
维普
