Impedance Matching

Question 1

Reasons for Impedance matching

Answer 1

Mismatch loss, standing waves on the line, damage to the generator

Question 2

Standing Waves causes

Answer 2

an increase in voltage and current stress which creates more loss and derates the cable

Question 3

It is critical for all elements in an RF chain to be

Answer 3

matched (Zin = Zo)

Question 4

How to address a mismatched link?

Answer 4

Add an impedance matching network

Question 5

Impedance matching used to just protect the generator

Answer 5

Attenuator

Question 6

Is an attenuator power efficient?

Answer 6

No

Question 7

What type of stub for coax or waveguide

Answer 7

Short, to prevent radiation

Question 8

What type of stub for a microstrip line

Answer 8

Open, to save a via

Question 9

S11 is equivalent to

Answer 9

Reflection coefficient

Question 10

S21 is equivalent to

Answer 10

Transmission coefficient

Question 11

Calculate impedance of quarter wave transformer

Answer 11

the square root of the load resistance times the the characteristic impedance

Question 12

Quarter wave transformer is a

Answer 12

narrow band solution