Which of the following conductors is preferred for bonding at RF?

• A. Flat copper strap
• B. Standard copper wire
• C. Aluminum conductor
• D. Insulated copper cable

Answer: (A)

In radio frequency (RF) applications, a flat copper strap is preferred for bonding because of its superior properties that enhance conductivity and minimize losses. The flat shape of the strap provides a larger surface area for contact with other conductive materials, which helps to reduce the overall inductance in the bonding connection. This is particularly crucial in RF systems, where high-frequency signals can be adversely affected by inductance, leading to inefficient signal transmission and potential interference.

Additionally, the flat copper strap is less prone to corrosion when exposed to the elements, maintaining a reliable low-resistance connection over time. This reliability is essential in ensuring the performance of RF equipment and preventing signal degradation.

While standard copper wire and aluminum conductors can be used for many electrical bonding applications, they do not provide the same advantages in terms of surface area and inductance reduction at high frequencies. An insulated copper cable is not suitable for bonding applications since insulation can prevent the necessary electrical connection between conductors. Hence, the flat copper strap stands out as the preferred choice for RF bonding.