CST – Computer Simulation Technology

Rectangular to Circular Guide Transition

Image of the Rectangular to circular guide transition Image of the Rectangular to circular guide transition

Rectangular waveguides were one of the earliest types of transmission lines used to transport microwave signals and are still used in many applications today. High-power systems, millimeter wave systems and precision test applications are just a few areas where these waveguides are used.

Transverse electric (TE) and transverse magnetic (TM) modes are supported (and are thus able to propagate) in hollow rectangular waveguide, while transverse electromagnetic (TEM) waves are not able to propagate, since only one conductor is present. The TE and TM modes have cutoff frequencies, below which propagation is not possible [Pozar, D.M].

The rectangular to circular waveguide transition is designed for the fundamental TE10 mode of operation in the rectangular waveguide and the TE11 mode of operation in the circular waveguide. The entire structure is design using air-filled sections. This transition is used to connect a rectangular waveguide to a circular waveguide, whilst maintaining low levels of reflection and transforming the operational mode from TE10 (rectangular) to TE11 (circular). As an application example, the transition might be used in a horn and reflector antenna setup, where a circular waveguide feed requires a standard rectangular waveguide for the connection to the rest of the microwave system.

Rate this Article

0 of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
contact support

Your session has expired. Redirecting you to the login page...

We use cookie to operate this website, improve its usability, personalize your experience, and track visits. By continuing to use this site, you are consenting to use of cookies. You have the possibility to manage the parameters and choose whether to accept certain cookies while on the site. For more information, please read our updated privacy policy

Cookie Management

When you browse our website, cookies are enabled by default and data may be read or stored locally on your device. You can set your preferences below:

Functional cookies

These cookies enable additional functionality like saving preferences, allowing social interactions and analyzing usage for site optimization.

Advertising cookies

These cookies enable us and third parties to serve ads that are relevant to your interests.