Electromagnetic Project for Applications of Transmission Lines Lab Report

User Generated

funv5b5n

Engineering

Description

I will attached the procedure for you to use for this project measurements and simulations.

you will need to get 30 days evaluation copies of either keysight ADS or RF Spice pro.

see the requirement

Unformatted Attachment Preview

A transmission line is a specialized structure designed to guide electromagnetic waves. When the structures are on the order or longer than the wavelength of the signal distributed analysis must be considered. This applies especially to microwave, millimeter wave and radio frequency engineering Consequently, the theory of transmission lines was historically developed to explain phenomena on very long telegraph lines and power lines. In this class you have been introduced to the theory and analysis of transmission lines. This project will allow you to develop a deeper insight into how transmission lines are characterized and modeled using measurements in the frequency domain and Smith charts. There are three parts to this Lab: 1) Analysis, 2) Circuit Simulation, and 3) Vector Network Analyzer measurements. 1.0 Transmission Line Analysis The expression for impedance transformation of a section of lossless transmission line is given by the expression: Where: Z0=Characteristic Impedance ZL=Load Impedance = distance from the load β=phase constant Use Matlab to calculate the real and imaginary parts of the input impedance Z in as a function of frequency and plot them. Do this for ZL=open ZL=short ZL=33ohms 2.0 Vector Network Analyzer Measurements Calibrate your NanoVNA using the SOLT procedure (2Ports) at the reference plane of the NanoVNA. Do this calibration now for a frequency sweep of (100Mhz-1Ghz) Plot S11 on the Smith Chart for: ZL=open ZL=short ZL=33ohms Now connect the 20cm cable that came with your RF Demo board: Plot S11 on the Smith Chart for: ZL=open ZL=short ZL=33 ohms ZL=50 ohms ZL=inductor Now plot Re(Z11) and Img(Z11) for: ZL=open ZL=short ZL=33 ohms ZL=50 ohms Verify the cable length using TDR. What relative dielectric constant are you using to Calibrate your NanoVNA using the SOLT procedure (2Ports) at the reference plane of the Demo Board by using the open,short, load and thru on the Demo Board. Do this calibration now for a frequency sweep of (50Khz-300Mhz) Verify the calibration by measuring the 33ohm load and plotting it Now Measure circuit #2 and plot the Smith Chart 3.0 Transmission Line Simulations Request an evaluation license for either Keysight ADS or EMag technologies RF Spice. Layout a circuit with a generic transmission line, a source with 50ohm source impedance and a load Impedance. Configure the simulation to generate S parameters and Z parameters to verify your Measurements over the two frequency ranges you did your calibrations over. Each software package has a different approach. Figure 1 ADS Schematic diagram for the transmission line circuit Figure 2 RF SPICE Schematic Diagram of the transmission line circuit Generate SMITH chart plots and plots of the real and Imaginary parts of the input impedance. Your plots should look similar to the figures shown below. Figure 3 ADS Smith and Impedance charts for ZL=33 ohms Figure 4 RF SPICE SMITH chart for ZL=33 ohms Figure 5 RF SPICE impedance chart for ZL=33 ohms For a frequency sweep of 100Mhz-1Ghz, Plot Smith and input impedance charts for: ZL=open ZL=short ZL=33 ohms ZL=capacitor For a frequency sweep of 50Kz-1Ghz, Plot Smith and input impedance charts for: Circuit #2 ZL=33 ohms You may wish to use the decade option to see the frequency points clearer. Remember the calibration was done at the reference plane on the evaluation board. What does this imply about the length of the transmission line for these simulations?
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

Attached. Please let me know if you have any questions or need revisions.

1.TITLE
A LAB REPORT ON TRANSMISSION LINES
2. INTRODUCTION
A transmission line is a special structure through which electromagnetic waves travel. It is a two-port
circuit used to connect a generator or a transmitter signal to a receiving load over a distance.
2.1 Applications of transmission lines
Analog applications
Connecting radio transmitters and receivers with their antennas
Distributing cable television signals
Used in power transmission lines
Digital applications
Traces on printed circuit board
Traces on multi-chip modules
Traces on integrated circuit packages
2.2 Distributed versus Lumped analysis
Generally, transmission lines are distributed parameter models, however lumped parameter models
are used for steady state and transient analysis of transmission lines. Lumped analysis is basically an
approximation.
Di...


Anonymous
Goes above and beyond expectations!

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Related Tags