• 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

Test Equipment Plus Develops High-Performance Custom Filters with CST MICROWAVE STUDIO


The Signal Hound® product line from Test Equipment Plus comprises a series of compact, lightweight, and affordable spectrum analyzers. The Signal Hound equipment is built on the design philosophy of maximizing performance while minimizing cost, and as well as having a wide range of applications for general engineering labs, it has also found success in fields ranging from telecoms and spectrum monitoring to aerospace and defense.

Figure 1 Signal Hound BB60C, which includes filters designed in CST MICROWAVE STUDIO.  

To remain competitive, Signal Hound products are designed for portability, affordability, and performance, with a better price-performance ratio than other entrants in the spectrum analyzer market. When designing the latest generation of products – real-time, USB-powered spectrum analyzers operating in the 9 kHz–12.4GHz and 9 kHz–6.0GHz bands – Test Equipment Plus worked to maintain their core competency and produce products with an excellent price-performance ratio....


The first prototypes for the next generation Signal Hound products did not meet the required level of performance to be competitive in the market and maintain a good value to Test Equipment Plus’s customers. The most critical weakness turned out to be the discrete, off-the-shelf filters employed in the design. Even after cascading multiple filters together and shielding them, the spectrum analyzers did not achieve their target performance. Test Equipment Plus was in need of a spectral filtering solution that had professional grade performance, without adding serious cost to the bill of materials.

With CST MICROWAVE STUDIO® (CST MWS), Test Equipment Plus was able to make a paradigm shift from using discrete filter components and turn to buried printed filters. These filters can be built directly into PCB boards and the only cost they add is the additional engineering time, since the fabrication cost of the printed elements is already included in the production cost. This solution would not have been possible without full-wave 3D EM simulation.

Figure 2 CST Studio Suite model of a 9-element coupled line filter with a via post wall.

Figure 3 Simulated performance of a 9-element coupled line filter, both in ideal conditions and with manufacturing effects taken into account, as compared with the performance of a prototype measured with an HP 8510C VNA.

As a small company with limited resources, versatility was a key feature that Test Equipment Plus looked for in a 3D EM solver. Beyond that, accuracy, speed, and usability were also very important, as was the expandability to easily add additional capabilities and technologies, such as the thermal solvers in CST MPHYSICS® STUDIO.

CST MWS provided Test Equipment Plus with the ability to produce virtual prototypes, and this has led to substantial savings in time and money when developing new products. Additionally, by investigating the effect of changes to device parameters, the engineers were able to reverse-model their physical prototypes in order to better understand the effect of natural manufacturing and materials variations; information that is invaluable for producing robust and manufacturable products.


Using the time domain solver in CST MWS with GPU acceleration, Test Equipment Plus was not only able to design custom filter solutions, but also to validate those designs by taking into account PCB manufacturing tolerances, aging effects and environmental variations (see Figure 3). This allowed them to design filters that are robust enough to withstand manufacturing variations and the effects of long-term use.

The filters enhance the spectral purity of the analyzers, offering an extra 35 dB of spurious-free dynamic range. CST MWS was the “silver bullet” for achieving this impressive performance gain over predecessor products. Without the capability that CST MWS provided, Test Equipment Plus would have had to drastically increase the product’s cost and change the form factor, or settle for lesser performance.

The design capability afforded through the use of full-wave 3D simulation helped Test Equipment Plus to evolve their products and take them to the next level. In addition, the technical support, user interface and workflow of CST Studio Suite made it easier to get started with the product and get accurate results effectively.

I have been very satisfied with the level of service CST has provided. I get more support now than I have ever had for any software or product. The fact that I can call tech support and speak with someone I already have a good working relationship with is invaluable. I have had some challenges with getting going with CST and the response has been more than satisfactory. I don’t expect a product to always work perfectly, in my view a company makes their bread in how they respond to hiccups and problems. CST has done a great job in addressing my specific challenges and continues to do so. Thanks for everything!


Morgan Roddy
  • Morgan Roddy
  • Microelectronics Physicist and Field Applications Engineer, Test Equipment Plus, Inc.

Rate this Article

0 of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Test Equipment Plus, Inc. provides top quality, affordable service and support for the used test and measurement market. They service equipment from HP/Agilent exclusively and also design, manufacture and sell the Signal Hound line of portable, affordable spectrum analyzers. With distributors on five continents, TEP has been able take great strides to level the playing field between them and the major players in the test equipment industry. Test Equipment Plus was founded in 1996 and is based in La Center, Washington, USA.
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.