S18 Transmission Line Trainer (501300MHz) 
S18
series brochure (PDF) 490K 
** Impedance matching designed
by Prof Girish Kumar, Dept of Elect Eng, IIT Bombay, India
Laptop shown above is not included 
Experiment
& Study Areas 
• 
Standing
Wave Patterns
upto four patterns at a time 
• 
Complex Impedance
measure R+jX 
• 
SMITH Chart
Auto and Manual 
• 
Study Relationship
of VSWR, shift in minima,
reflection coeff for 

Case 1: Matched Line 

Case 2: OpenCircuited Line 

Case 3: ShortCircuited Line 

Case 4: Inductive (nonresistive) Load 

Case 5: Capacitive (nonresistive) Load 

Case 6: Resistive Load > Zo 

Case 7: Resistive Load < Zo 

Case 8: ResistiveInductive Load 

Case 9: ResistiveCapacitive Load 
• 
VSWR, V(i), V(r) vs FREQ 
• 
Impedance Matching 
• 
Impedance Variation
along
mismatched line 
• 
Insertion Loss 
• 
TDR (Time
Domain Reflectometer) 
• 
NETWORK / SPECTRUM Analysis 
