这是一篇来自英国的关于为了更好地了解在微波和毫米波频率下影响传输线设计参数的实验室作业代写，具体详情可扫码咨询客服
PREREQUISITES
Prior to the lab, read chapter 2 of Microwave Engineering by David Pozar.
AIMS
- Get familiar with AWR Microwave Office (MWO) software suite
- Understand the parameters affecting the behaviour of various types of high-frequency transmission lines
- Perform 3D simulations of transmission line structures with MWO’s AXIEM tool
REPORT GUIDELINES
To pass this course, you will need to provide sufficient evidence that you have taken part in the labs and performed the work yourself.
8 pages maximum, including references. Pages over the limit will be discarded.
Be sure to include in your report formulas you have utilised, schematics, plots, and answers to all the questions distributed throughout this document. You should provide references to qualify your statements, and these should be in IEEE format.
Do not copy sections of the lab script into your report. These will not be awarded marks and will take up space for creditable content.
BACKGROUND
The main purpose of this lab is to get a better understanding of the parameters affecting transmission line design at microwave and millimetre wave frequencies. In this series of labs, you will learn to use the industry standard AWR Microwave Office (MWO) design software to design and simulate microwave and millimetre wave circuit components. Similar software packages employed in research and industry include Keysight’s ADS and Ansoft Designer.
Transmission lines are one of the most fundamental and significant elements in microwave integrated circuits. Unlike at lower frequencies including DC where transmission lines are only used to carry signals or currents between components, at microwave frequencies they are also used as components, e.g. resonators, capacitors, and inductors. In this series of labs, you will discover that circuit design at microwave frequencies is significantly different from circuit design at low frequencies.
Q1
What are the fundamental differences in circuit design at microwave frequencies when comppared to DC?
EXPERIMENT 1: DESIGN OF MICROSTRIP AND COPLANAR WAVEGUIDE TRANSMISSION LINES
This section will walk you through designing transmission lines in MWO. To begin, open the AWR Design Environment to reveal the window as below.
You can find the Project tree on the left and some commonly used express buttons or shortcuts on the top. By clicking File and selecting Save As, give a name to the project, e.g. yourinitials_MMLab1, and save the file to a reliable location.
Before carrying out any circuit simulation, we will first learn how to use one of the MWO’s built-in tools called TXLine. TXLine software enables users to determine either physical or electrical characteristics of common transmission line architectures, such as microstrip, stripline, coplanar waveguide (CPW), and slotline.
You can access TXLine via Tools > TXLine
Given a set of material parameters, such as the dielectric constant of a substrate, TXLine uses empirical formulas to approximate electrical characteristics of transmission lines from physical characteristics and vice versa.
In this experiment, you will be designing two types of transmission line. Namely, a microstrip line on an FR4 substrate at 2.4 GHz, and a CPW on a semi-insulating GaAs substrate at 77 GHz, each with a characteristic impedance of 50 Ω.
Open TXLine, click on the microstrip tab, and enter the details as listed in the table below. The FR4 material parameters are not provided in the drop-down dielectric list, so you’ll have to enter the parameters for it manually.
Click on the rightward-pointing arrow in the centre of the window to generate the physical length and width of the microstrip line. Note these dow and repeat the procedure for the CPW line. Add the calculated parameters to your report.