Braid angle is the smaller of the two angles formed by the shielding strand and the axis of the cable being shielded.
In cable construction, braid angle is a key factor that determines both shielding performance and cable flexibility. Metallic filaments such as copper, tinned copper, or aluminum are interwoven around the cable core to form a braid. The angle where these strands intersect the cable’s axis is known as the braid angle. A shallow angle improves flexibility but reduces shielding coverage, while a steeper angle enhances EMI and RFI protection but can make the cable stiffer. Designers optimize braid angle to strike the right balance for applications ranging from highly flexible installations to systems requiring maximum shielding integrity.
Braid angle impacts shielding performance evaluated under standards from IEEE (Institute of Electrical and Electronics Engineers), IEC (International Electrotechnical Commission), and TIA (Telecommunications Industry Association).
The concept of braid angle became formalized with the advancement of shielding in the mid-20th century, particularly in coaxial cables for broadcasting and telecommunications. Manufacturers refined braid angle designs to achieve reliable EMI protection while maintaining mechanical durability and handling properties.