Question

The use of a directional coupler requires which of the following adjustments in the return paths?

A) Increasing the return loss
B) Reducing the attenuation
C) Increasing the isolation
D) Reducing the impedance

Answer 1

Increasing the isolation in the return paths is often necessary when using a directional coupler to prevent feedback and interference, which helps maintain signal integrity and minimize damping that can reduce the amplitude of the wave as it propagates.

Option C Increasing the isolation is correct.

Step-by-step explanation:

The use of a directional coupler in a system does not typically require adjustments to the return paths in terms of changing the impedance or increasing return loss. Instead, the use of a directional coupler might necessitate increasing the isolation to ensure that the signal does not feed back into the source or other parts of the system, which can cause interference and compromise system performance. A directional coupler serves to reduce energy loss during transmission by effectively directing the signal to where it is needed. The choice often depends on the specific requirements of the application, but the primary consideration with directional couplers is to maintain signal integrity and minimize any potential damping that can decrease the amplitude of the wave as it propagates through the system.