• Which Products are you interested in ?

    CST offers a wide range of EM simulation software to address design challenges across the electromagnetic spectrum, from static and low frequency to microwave and RF, for a range of applications, including EDA & electronics, EMC & EMI and charged particle dynamics.

  • Antenna Magus
  • IdEM
  • FEST3D
  • Optenni Lab
  • Looking for a Training, Workshop or eSeminar ?

    CST STUDIO SUITE® is being demonstrated at trade shows and workshops all over the world. Take a look at the list of conferences and exhibitions CST will be attending and get further information regarding CST workshops, eSeminars and training days.

  • TrainingsRegular training courses are held in CST's offices in Asia, Europe, and North America. Please check our trainings section for detail of trainings in all over the globe. Advance registration is normally required.

  • WorkshopsCST hosts workshops in multiple languages and in countries around the world. Workshops provide an opportunity to learn about specific applications and refresh your skills with experienced CST support staff. Make sure you visit our workshop section.

  • eSeminarsThroughout the year, CST simulation experts present eSeminars on the applications, features and usage of our software. You can also view past eSeminars by searching our archive and filtering for the markets or industries that interest you most.

  • Check our latest Events
  • Why create a MyCST Account ?

    A MyCST account may facilitate your access to many of the offerings on the CST website, for example the registration for eSeminars and the watching of eSeminars recordings, setting email preferences, and there is more functionality to come. It is required to participate in workshops and trainings.

  • Personal PreferencesAllows you to update your email preferences and areas of interest. It helps us to personalize your experience.

  • EventsSearch for events by location, industry and application. Once you are registered, you will be able to manage your registrations and check important details about your events. This section also provides you with a repository for Workshop & Training material.

  • LibraryYou can collect articles you find on the CST website to reference or read later by clicking on the “Add this article” button at the bottom of the article page.

  • Create Your Own Account
  • Need technical Support ?

    Customers can customize their accounts once they have completed the account creation process. This platform acts as vivid interface between CST and our customers.

    We therefore offer access to the latest Service Packs (including an automatic notification that a new Service Pack is available), a steadily growing database of Frequently Asked Questions (FAQs), Application Notes and Training Videos, as well as an individual FTP section for easy exchange of large files with our support team.

  • Do I need an Account?To access the Support Site a valid maintenance contract and a one-time registration is required.

    Please note that your Support login does not work for the MyCST account.

  • Get Support
  • How to request a Trial License ?

    Get your license in only three steps:

    1. Fill in the required fields in the contact form on the right and click "Send Us Your Request".

    2. Lean back and wait until one of our CST Experts contacts you.

    3. Enjoy a our trial license.

  • Student Edition

    Student Edition The CST STUDIO SUITE® Student Edition has been developed with the aim of introducing you to the world of electromagnetic simulation, making Maxwell’s equations easier to understand than ever. With this edition you have, bar some restrictions, access to our powerful visualization engine and some of the most advanced solvers of CST STUDIO SUITE.

    Student Edition

CST – Computer Simulation Technology

An Antenna Magus Design Case Study: 11 GHz Reflector Antenna Feed with Dual Polarization

All antenna engineers are familiar with a number of antennas. For some it is only a handful, while others seem to have unlimited knowledge of different antenna types and an in depth understanding of the underlying physics that makes them work. Realistically, no single person can know everything about antennas, but it does seem that hands-on experience is probably the most valuable commodity in the field of antenna design. When faced with new design requirements, most engineers will start with antenna topologies that they are familiar with. 

Antenna Magus has revolutionized this first step in the antenna design process by broadening the scope of possible antennas that would be considered during the initial phase of design. 

Let's look at a typical case where an antenna engineer or consultant needs to design an antenna for a specific system or application. Assume the client supplied the following specifications:...


  • Design a feed for a reflector with F/D of 0.6
  • Dish diameter: 400mm
  • Frequency: 11 GHz
  • Total gain: 25 dBi
  • Feed antenna -10 dB beamwidth: 80 degrees
  • Dual linear polarization

    The most common workflow would start by setting up a Specification with everything that can be specified, and selecting appropriate suggested keywords, or adding them directly from the keyword dictionary. For this example, the engineer may enter "reflector feed" and "dual polarization capable". The selection of potentially suitable antennas returned using this Specification in Find Mode is shown below (note that only specifications relevant to the feed antenna have been specified):

    Reflector feed antenna options Reflector feed antenna options.

    Without any detailed understanding of any of these antennas, the engineer can use the Quick Summary Table in Find Mode, or the complete Information Document in the Information Browser to gain a very good overview of each antenna. These Information Documents outline basic specifications and highlight advantages and disadvantages of the antennas that might be worth considering for the design. The three antennas that will be investigated for this design are shown below:

    Reflector feed antenna options - design case study1 Three potential reflector feed antennas that will be investigated in this case study

    Information on these antennas can be compared using the Antenna Magus "compare" option in the information browser. A "side-by-side" view in which information is arranged and displayed as shown below: 

    Side-by-side compare of three antennas Side-by-side comparison of three antennas' information documents supplied by Antenna Magus. Click on image to enlarge.

    Next the engineer adds each of these antennas to the collection, which triggers an automated "Reference Design" using the relevant objective values from the specification. Since not all the required values have been included in the specification, further designs are added to each antenna in order to try and achieve the required -10 dB beamwidth of 80 degrees. 

    Axial-choke antenna design in Magus - design case study1 Axial-choke conical horn antenna design. Preview taken from Antenna Magus software.
    Diagonal horn antenna design in Magus - design case study1 Diagonal horn antenna design. Preview taken from Antenna Magus software.
    Corrugated horn antenna design in Magus - design case study1 Corrugated conical horn antenna design. Preview taken from Antenna Magus software.

    Note that in most cases Antenna Magus allows the user to design antennas for different objectives like gain, beamwidth and frequency. The corrugated horn can also be designed for 10 dB beamwidth which was specifically implemented for reflector feed design. The Axial-choke antenna can also be designed for "main beam flatness" which is often a requirement for reflector feed design as a flat main beam with a steep drop-off illuminates the dish uniformly with very little spill over. 

    Although Antenna Magus has no 10 dB beamwidth design option for the Axial-Choke and Diagonal Horn the quick estimated performance feature offers an alternative solution. Antenna Magus' quick analysis feature (called estimated performance) is ideal for doing a few rough simulations to find out which design comes close to the 10 dB beamwidth specification, seeing that in this case a single simulation takes only a few seconds. 

    The following graphs show the estimated performance for all three antennas. 

    Axial choke gain graph - design case study1 Axial-choke antenna estimated E- and H-plane gain
    Diagonal horn gain graph - design case study1 Diagonal horn antenna estimated E- and H-plane gain
    Corrugated horn gain graph - design case study1 Corrugated horn antenna estimated E- and H-plane gain

    The numeric estimated performance data can also be exported to compare the results on the same graph as shown on the next image, where the normalized H-plane 10 dB beamwidth of all three antennas is compared. So far it seems like the Axial Choke antenna will be the best option as it has a nice flat main beam with steep drop-off which is ideal for uniform reflector illumination.

    Reflector feeds overlayed to see 10dB beamwidth - design case study1 Comparison of 10 dB beamwidth of three antennas' estimated performance

    Once the engineer is satisfied with the designs, the final step is to export the "ready-to-run" antenna models to CST Studio Suite® where the antenna elements can be further designed and optimized to meet the given requirements. 


    The ready-to-run models exported by Antenna Magus at the click of a button would save an engineer several days (if not weeks) that would have been spent building and adjusting simulation models to be ready for accurate analysis and optimization.

    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.