GORE® SNAPSHOT® EMI Shield Application Summary: Rugged Handheld Computer
Improve signal integrity in low-profile handheld devices for rugged environments
Application Overview
A customer was developing a new generation of a handheld computer for use in rugged industrial environments. The device offered five separate radio interfaces — GPRS, CDMa, GPS, 802.xx WAN, and Bluetooth. Key issues for this application include the following:
- Reliable data transmission without interference among the separate interfaces
- Minimized stack-up
- Low-profile package
The device’s stack-up included a display, a keypad, multiple boards for processors, the radios, and memory. The customer quickly realized that traditional cans would not meet the low-profile requirements for the device.
The Gore Solution
GORE® SNAPSHOT® EMI Shields improve shielding effectiveness by more than 10 dB, providing excellent signal isolation between critical areas. Using these flexible, multi-cavity shields,the customer was able to focus on effective PCB design and mechanical layout without being limited by the shape of traditional shielding cans. GORE® SNAPSHOT® EMI Shields reduced the product profile by varying the height and shape of each of the nine shields used in the handheld computer.