Application of Top-down Method in Structure Design for PA Module

Considering both existing enterprise design environment and traditional design process,exploiting the advantage of Top-down method of 3D design software,the use of software is transited from general application to advanced application.Taking the structure design of power magnifying(PA) module of radar transmitter system as an example,some techniques of Top-down method modeling used in electronics and machinery industry for small scale assembly are discussed in this paper.Starting from the 3D assembly document of PA module,taking total structure and the layout of electronic devices as original reference,links between features of related parts and top layer factors,and between features of different parts are established via copy geometry,reference,parameter transmission,etc.,synchronous regeneration of related parts in the assembly is realized.Another method that directly referring to top layer features or main parts,so as to realize the application of Top-down method in small scale assembly is discussed also in this paper.Using Top-down method,modeling speed of 3D assembly is increased evidently,design accuracy is enhanced.At the same time,the method also helps the post-modification and reuse of products,attaining the rapid design purpose.