Module1_Directional Coupler

The number of ports in Directional Coupler are

• One

• Two

• Three

• Four

In coupled line directional couplers, power from one line to another is transmitted through a microstrip line running between them.

• True

• False

The conditions for all ports to be perfectly matched

• S₁₁=S₂₂=S₃₃=S₄₄=0

• S₁₁=S₂₂=0

• S₂₂=S₃₃=0

• S₃₃=S₄₄=0

Multisection couplers have a very narrow operational bandwidth which is a major disadvantage.

• True

• False

Directivity of a directional coupler signifies the direction of power flow in the coupler.

• True

• False

Coupling factor of a directional coupler must be maximum and is a key factor that determines the performance of the coupler.

• True

• False

Insertion loss is the power delivered to the through port.

• True

• False

Isolation of a directional coupler is a measure of the:

• Power delivered to the uncoupled port

• Power delivered to the coupled port

• Power delivered to the second port

• None of the above

Three section binomial couplers have very low directivity as compared to other coupler designs.

• True

• False

If the coupling coefficient of a coupled line coupler is 0.1 and the characteristic impedance of the material is 50 Ω, then the odd mode characteristic impedance is:

• 45.23 Ω

• 50 Ω

• 38 Ω

• None of the Above