In the active circuit part , based on the theories of multiplier of srd and fet , we have designed the circuit of x band 6 multiplier and ka band tripler . then they are simulated and optimized using harmonic balance method . furthermore , the results of optimization and experiments are analyzed 在有源電路部分,我們介紹了階躍管、 fet倍頻器的基本原理,在此基礎上分別設計了兩個倍頻器電路,然后利用諧波平衡法進行了仿真,并對仿真、測試結果作出了比較。
Its basic theories are these : theory of circle cumulate cause and effect , theory of tourist destination lifecycle , theory of income and distribution , theory of multiplier , theory of information asymmetry and theory of sustainable development etc . these theories can be classified into two groups according to their functions 在對前人研究的歸納和梳理的基礎上,作者認為旅游扶貧涉及到社會經濟的各個方面,它的理論也應當是高度綜合的。它的理論基礎包括:循環累積因果理論、旅游地生命周期理論、收入分配理論、乘數理論、信息不對稱理論和可持續發展理論等。