BandSorb-SC used at 24.5 GHz

Cavity resonance suppression at 24.5 GHz Introduction: Modern electronic devices are working at increasing frequencies and require a high level of separation of signals for different parts of the device. Failing to provide the correct level of separation will lead to an underperforming system. Typically shielding is used to separate the different parts of the circuit. The lack of sufficient foot print to separate the different parts and the occurrence of cavity resonance can put the use of shielding to its limits. A short range automotive radar working at 24 GHz is a typical example of such a system....... Read More

Date:  31-10-2018Category:  Usage

DynaShear / DynaGreenTM Selecting the right profile

Schlegel Electronic Materials (SEM) introduces DYNASHEAR TM and DYNAGREEN TM an innovative EMI shielding gasket family for the shielding of modules in card/cages environment that is able to offer superior features over metal fingerstocks and current Fabric-Over-Foam gaskets . DYNASHEAR TM and DYNAGREEN TM utilize the bump technology that result from a three axis development program : - SEM famous special flat D-Profiles with bump. - Low memory ultra soft foam type 7. - Abrasion resistant conductive fabrics...... Read More

Date:  21-10-2015Category:  Usage

SEM‘s Gaskets attachment options

1. Pressure Sensitive Adhesive (PSA) The most popular attachment method is the Pressure Sensitive Adhesive (PSA). Standard PSA are non conductive and are dimensioned to not cover the entire gasket surface to ensure direct electrical contact. The constraints applied on the adhesive vary in large proportions depending on the type of application. There are limited constraints for static applications because the adhesive is just there to hold the gasket the time before it will be compressed. At the contrary, for dynamic applications, constraints increase and especially when forces are exerted in the horizontal axis (for ex. during blade or module insertion) which tends to push the gasket. Schlegel Electronic Materials has selected 3M acrylic based adhesives with high shear strength values* to guarantee adhesions even in the most challenging dynamic applications...... Read More

Date:  05-10-2015Category:  Usage

Non Conductive PSA (Pressure Sensitive Adhesive) Versus Conductive PSA

Influence of conductive (D) and non conductive (R) adhesive on Shielding effectiveness for Fabric-Over-Foam gaskets Schlegel Electronic Materials recommends the use of non conductive adhesives in most cases (type R).All gaskets have a PSA width recommended according to the width of the profile to ensure sufficient direct contact at the bottom of the gasket with the application. Test was carried out according to SAE ARP 6248 (stripline method) on EW8 (9/3 mm) in order to measure the influence of non conductive PSA ( 2.5 mm and 4.5 mm wide) and conductive PSA ( 8 mm wide) .Three profiles were tested compressed at 50% up to 40 GHz ...... Read More

Date:  18-09-2015Category:  Usage