Overview of Impedance and Reflection Coefficient in 1-Port Network Transmission Lines
Explore the fundamentals of 1-port networks, focusing on impedance, admittance, and reflection coefficient. This lecture from EEE 212 delves into the review of these key concepts essential for modern antenna design. Drawing insights from HP/Agilent Application Note 95-1, the discussion provides a foundational understanding necessary for working with transmission lines in antenna systems.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
E N D
Presentation Transcript
Modern Antenna Design EEE 212
EEE212 Week 1, Lecture 1 REVIEW OF IMPEDANCE AND REFLECTION COEFFICENT
1-port network Can be described with: 1. Impedance 2. Admittance 3. Reflection Coefficient
1-port network: Transmission Lines Figures from: HP/Agilent Application Note 154
Quiz: Calculate reflection coefficient from impedance in the following cases
Quiz: Calculate reflection coefficient from impedance in the following cases
Quiz: Calculate impedance from the reflection coefficient in the following cases
Quiz: Calculate impedance from the reflection coefficient in the following cases
Impedance Plane Figures from: HP/Agilent Application Note 154
Mapping impedance Z=1 and Z=jx to the reflection coefficient plane Figures from: HP/Agilent Application Note 154
Mapping Impedance 1+jx to the reflection coefficient plane Figures from: HP/Agilent Application Note 154
Decibels https://www.youtube.com/watch?v=06N- 5aUaV9w&t=12s
Decibels We measured that S21=3dB, what is the power ratio and what is the voltage ratio? S21=-3dB S21=6dB S21=-6dB S11=-40dB Insertion loss 10db Return loss 10db
Reading reflection coefficient S(1,1)-Parameter
Half-Power Beamwidth Voltage linear scale
Half-Power Beamwidth Power linear scale
Half-Power Beamwidth in dB
Google Antenna Datasheets https://www.lsr.com/downloads/products/330- 0094.pdf https://dl.ubnt.com/datasheets/airmaxsector/airMAX_ Sector_Antennas_DS.pdf https://www.cisco.com/c/en/us/products/collateral/wi reless/aironet-antennas- accessories/prod_white_paper0900aecd806a1a3e.htm l https://anechoicchamber.ku.edu/sites/chamber.ku.edu /files/images/galleries/equipment/AnechoicChamber_ AntennaDatasheet.pdf
Microstrip Patch Antennas Week 2
http://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWhhttp://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWh 7AC
http://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWhhttp://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWh 7AC
EEE212 MICROSTRIP PATCH ANTENNA
http://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWhhttp://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWh 7AC
History Microstip radiation effects reported by Grieg and Engelmann (50s) Deschamps an array of triangular antennas (50s) 70s new generation of missiles required antennas conforming to the missile surface In 80s substrate manufacturing improved intense R&D focused on patch
http://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWhhttp://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWh 7AC
http://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWhhttp://books.google.com/books/about/Handbook_of_Microstrip_Antennas.html?id=NhNk04gWh 7AC
EEE212 FEEDING A PATCH
