Microwave Course

Microwave Course

with

QuickWave EM Software

To facilitate using QuickWave in microwave courses, the examples investigating basic electromagnetic scenarios are included, as well as a short background description. These examples, together with microwave background description, become complementary introductory to fundamental microwave phenomena. All the interesting features are visualised using electromagnetic simulation with QuickWave software.

All examples used here were prepared in free CAD QW-Modeller for QuickWave and the models preparation procedure is described in separate documents. All examples considered herein are included in the QW-Modeller and QuickWave STUDENT Release installation as both, QW-Modeller and QW-Editor projects.

Plane Wave - normal incidence

The aim of this training is to point out main properties and behaviour of the plane wave propagating in an isotropic medium and incident normally at the media boundaries. This part consists of the following topics:

Basic properties of a plane wave
Relation between a frequency and a wavelength
Relation between a wavelength and medium parameters (permittivity and permeability)
Envelope shape in lossy media
Normal incidence of a plane wave on the two lossless dielectric media boundary
Normal incidence of a plane wave on a perfect conductor surface
Quarter wavelength transformer
Half wavelength transformer
Impedance matching
Plane wave incident normally at the layered structure of three lossless media: air-concrete-air
Plane wave incident normally at the layered structure of three lossless media: air-concrete-air - impedance matching

Rectangular Waveguides

Waveguides are transmission lines commonly used in electronics, especially in higher frequency ranges like microwaves. A waveguide can be simply described as a metal pipe usually filled with air. This tutorial is dedicated to rectangular waveguides and contains all basic information concerning their operation rules. This part consists of the following topics:

· Wave propagation in rectangular waveguide

· Waveguide mode

· Higher order modes

· Wavelength in a waveguide

· Propagation below the cutoff frequency

Circular Waveguides

This tutorial is dedicated to basic properties of circular waveguides. This part consists of the following topics:

· Cutoff frequency

· Mode TE₁₁

· Mode TM₀₁