
1.设计好Tline
2.Tools — LineCalc — Start LineCalc 用这个东东计算MLine各种参数:
Er: substrate dielectric constant
H: subatrate height
T: metallization thickness
Cond: the conductivity of the conductor layers. for copper cond=4e7
Tand: the loss tanget. for copper at 0.022
比方说用RT/Duroid做基板:
Er=2.20, H=20th or 0.508mm, T=0.1th or 2.5*10^-3 mm, cond =4.1*10^7
Rough=0, Tand= 0.0009
W: Mline宽
l: Mline长
Z0: 特性阻抗
E_Eff: 电角度
用synthesize或analyze可以方便地进行W\\l和Z0\\E的相互转换
右下角“Caculated Resaults”框中:
K_eff: the effective dielectric constant
A_dB: the loss of the line
3.新建design:), analog/rf network, 模版可选用s-params。然后从左边下拉工具栏
选Tlines-Microstrip,用微带线元件构造电路。
MSUB: for the microstrip substrate characteristics,与LineCalc里的数据一样
Mlin: microstrip line,长宽已用LineCalc算出
MTEE: tee juction
MBEND: for microstrip line bends and mitres
MLOC: for microstrip end effects
MSTEP: abrupt change in the width of the microstrip
TFR: thin film resistor
4. 主菜单Layout – Generate/Update Layout
