Topic outline

  • Topic 1, transmission line theory

    In this topic, we will review and deepen our understanding of transmission line theory, previously covered in the Bachelor's level course "Piirianalyysi II" (Circuit Analysis II) and the Electromagnetic Fields course. This topic is crucial, as transmission-line effects - such as wave reflection and transmission - play a pivotal role in nearly all microwave devices. The most common type of transmission line is a coaxial cable which is used, for example, in television, WiFi modems, measurement devices etc. Additionally, microstrip lines are very important in microwave engineering, enabling direct integration into the printed circuit boards. Consequently, our focus will extend to the design principles of microstrip lines.  

    The dedicated intended learning outcomes of Topic1 are:

    • The student is able to explain the wave propagation of a radio-frequency signal in transmission lines (such as signal propagation, attenuation, and reflection), and
    • They can calculate and simulate (AWR) related circuit parameters (such as voltage, current, power, characteristic impedance, loss, and reflection coefficient) related to transmission lines,
    • They are able to design transmission lines (such as microstrip lines) with calculations and simulations (AWRDE).


    In this topic, one should command the following subjects of the course book:

    • Transmission line model, telegraph equations, wave equations and its solution (Pozar Chapter 2.1)
    • The connection between the transmission line theory and electromagnetic field theory (Pozar Chapter 2.2)
    • Wave propagation along a transmission line and characteristic impedance (Pozar Chapter 2.1 and 2.7)
    • Microstrip line (Pozar Chapter 3.8)
    • Voltage reflection from an impedance discontinuity and standing wave along a transmission line (Pozar Chapter 2.3)

    Availability of AWR Design Environment:

    • remote usage with personal PCs is available through mfavdi.aalto.fi
    • in PC classes and AS5 (1621) in Maarintie 8 building
    • in PC class "Maari E" in the "Maarintalo" building (Sähkömiehentie 3)
    • for personal PC: AWR free trial: here

◄ Previous section
Page for Tuesday exercise sessions
Next section ►
Topic 2, Smith chart and impedance matching