使用Microwave 设计滤波器

Getting started with microwave officeGetting started with microwave office
The following instructions allow the user to use some of the facilities of microwave office. The following microstrip lowpass filter is studied.

Width W2 l1
1

l3

Width W4 l3

l1
2

Width

l2 Width W3

l4

l2

Figure 1 Low pass filter The initial values of the length and widths have been calculated for a filter with cut of frequency of 1GHz and are given below. l1= 15000 l2=4550 l3=11780 l4=13650 W1=1115 W2=3722 W3=144 W4=3722 Table 1 Values of parameters The filter is designed on Duroid with thickness 1.27mm, permitivity 10.8 and copper thickness 35m Circuit simulation The first part is to simulate the frequency response of this filter using circuit techniques. Start Microwave Office under windows 95 by going to the Start menu and looking under the