Module 2b: Learning Materials -- HP, BP, BS RF Filter Design

To-Do Date: Jan 28 at 11:59pm
 

ECE 5321/6323 LEARNING MATERIALS 2B -- RF Filters (HP, BP, BS designs)

    Introduction

    In this module, we will be learning about RF filters and how to design them using the Insertion Loss method.

    2A: We will begin with the basics of lumped element filters, which are applicable at lower frequencies as well as RF frequencies. We will review low pass, high pass, band pass, and band stop filters, and how to implement low pass filters with maximally flat (Butterworth), equal ripple (Chebyshev), and Elliptic designs.

    2B: We will then learn how to convert the LP designs to HP, BP, BS designs, still with lumped elements.

    2C: Next, we will learn how to convert the lumped element designs to distributed designs using stubs and 2D: stepped impedances. Finally, we have information on practical implementation issues.

    Learning Materials

    Readings:2B

    Material/Lecture content

    Topic 2B: Lumped Element Filters (HP, BP, BS)

    Converting from LP to HP, BP, BS Designs

    Design of BP Prototype Maximally Flat (Butterworth) Filter N=3 (RF Design Basics)

    https://www.youtube.com/watch?v=CMYZml2Vaj8 Links to an external site.

    Design of HP Maximally Flat (Butterworth) Filter N=6 (RF Design Basics)

    https://www.youtube.com/watch?v=sP7G1rnW2aI Links to an external site.

    Design of 0.5 dB Equal Ripple (Chebyshev) HP Filter (RF Design Basics)

    https://www.youtube.com/watch?v=oi1pJ64f5IA Links to an external site.

    Design of 0.5 dB Equal Ripple (Chebyshev) BP Filter (RF Design Basics)

    https://www.youtube.com/watch?v=zFTwKzQFd3Q Links to an external site.

    Design of 3 dB Equal Ripple (Chebyshev) Band Stop Reject Filter (RF Design Basics)

    https://www.youtube.com/watch?v=7_lKluB1v1c Links to an external site.

     

    Supporting Material

    Review: What are S-parameters? (reflection and transmission coefficients) https://www.youtube.com/watch?v=-Pi0UbErHTY Links to an external site.

    Review: What are ABCD-parameters?(This matrix allows you to calculated cascades of series networks just by multiplying the ABCD matrix. These can easily be converted to/from S-parameters.)

    Review: dB

    Dr. Furse's Filter Design Cookbook:

    Filter Simulation in ADS:

    Filter Calculators: (Check your work with these)

    Class LIVE VIDEO Meetings

    We will meet Tuesday and Thursday from 1230-145 by Zoom. See link on the Canvas navigation to your left.

    Thursday:

    Activities

    You can access the activities by clicking "next" below or through the navigation links at the top of the page.