• 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.

  • CST STUDIO SUITE
  • CST EMC STUDIO
  • CST BOARDCHECK
  • 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

Microdul Gains Deeper Insight into Finger Detection Sensors with CST EM STUDIO

The challenge: Reliability of electrostatic proximity sensors in a difficult environment

Microdul produces proximity sensor chips that can be used with remote sensing plates. Changes in plate capacitance are detected by a digital auto-calibrating algorithm. An approaching human finger typically causes a switching operation. This principle is demonstrated in Figure 2. The capacitive switch can be used for many non-contact applications. The main challenge is to develop a sensor which can reliably distinguish between intentional switching operation and environmental interference.

Figure 1: Finger sensor application.

Application

Microdul investigated the influence of different grounding arrangements on the sensor’s capacitance. Figure 2 shows a finger model placed above two sensor plates. The objective is to obtain the influence of the ground rings....

 Figure 2: Finger model above sensor plates with ground rings (enclosing the sensor plates).

The plots of the electric potential distribution show how the field is constrained by the ground rings. This constriction is highlighted by arrows in Figure 3.

Figure 3: Double sensor plate: Electric potential distribution with ground rings.

By using the integrated parameter sweep of CST EM STUDIO (CST EMS) the capacitance can be rapidly and efficiently obtained for different values of the permittivity (εr) and the panel thickness (d_Panel) for configurations with and without ground rings. Figure 4 shows these results.

Figure 4: The sensor’s capacitance is slightly higher without ground rings.

CST Studio Suite helps to understand the sensor’s electrostatic behavior better

The main benefit gained by using CST Studio Suite is an improved understanding of the effect of design parameters on the performance of the sensing plate. CST EMS helps Microdul to support existing or potential customers more efficiently with their individual needs with proximity sensors. This deeper insight allows Microdul to provide their customers with higher-quality application notes.

The combination of accuracy and speed in CST EMS is the most significant advantage for Microdul. Reliable simulation results are available within a reasonable time. The software is intuitive and easy to use, since using an EM simulation tool was completely new to Microdul. All models were created in CST EMS using the powerful built-in 3D modeler with its parameterization capabilities. The “parameter sweep tool” turned out to be a very useful function since multiple simulations could be run over night to obtain results for the complete parameter space.

x

CST software has definitely improved our knowledge about EM fields. With the newly obtained knowledge we can now better advise potential customers. We believe that this puts us ahead of our competitors. The CST software definitely met our expectations. The intuitively usable software is working efficiently and is stable.

AuthorQuote

Unknown
  • Roger Infanger
  • , Microdul AG
  • Grubenstrasse 9, CH - 8045 Zürich, Tel: +41 44 455 35 27, Fax: +41 44 455 35 95

Rate this Article

5 of 5 Stars
5 Stars
100%
4 Stars
0%
3 Stars
0%
2 Stars
0%
1 Stars
0%
Microdul AG is a specialist in high quality microelectronics. Microdul has a broad range and depth of experience. Thanks to Microdul‘s three business lines, Module, Thick-film, and Semiconductors, there is a wide spectrum of choice with respect to electronic miniaturisation. Microdul’s core competence is the production of cutting edge individual solutions in close cooperation with the customer.
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.