cpw空气桥的分析及其在定向耦合器中的应用word格式论文.docxVIP

AbstractAir bridges are widely used in MIC and MMIC, it will cause occur slot line pattern.Air bridge is a method of cross connection,which has low parasitic effects,it can be used to suppress the slot line pattern in CPW.Compared with the traditional welding technology,it has obvious advantages.CPW directional coupler is used more widely than the microstrip directional coupler for easier integration, smaller size,lower cost and weaker dispersion.Because the air bridge can inhibit slot line pattern, the research on CPW air bridge and its application in CPW directional coupler has great significance and engineering value.This paper studies the CPW air bridges,two methods for improving the transmission characteristics of the air bridge and the CPW air bridge on the coplanar waveguide directional coupler. First,the geometrical parameters of the CPW air bridge is analyzed and studied,and the location and number of the CPW air bridge is also disscussed.Through the comparison of transmission characteristics of CPW air bridge A and CPW air bridge B, the air bridge type according to different requirements can be selected.The transmission characteristics of CPW with air bridge becomes bad,this paper proposes to improve the transmission characteristics of CPW with air bridge by ground floor opening and the air bridge drilling. The simulation results show that the transmission properties of CPW improved a lot. The result is better when uses two kinds of metheds. Finally, the effects of different types of CPW air bridge on CPW directional coupler is discussed. CPW directional coupler with air bridge can eliminate inconsistency caused by gound, it also can inhibit the directional coupler of slot line mode, broaden the bandwidth and improve the port matching and isolation.Key words: Directional coupler, coplanar waveguide, ground digging, airbridge, bandwidth目录专用术语注释表 .................................................................................................................