Electronics and Communication Engineering - Microwave Communication - Discussion
Discussion Forum : Microwave Communication - Section 1 (Q.No. 2)
2.
A loss less line of characteristic impedance Z0 is terminated in pure reactance of -jZ0 value. VSWR is
Answer: Option
Explanation:
A pure reactance does not absorb any power.
Therefore VSWR is infinite because |rv| = 1.
Discussion:
9 comments Page 1 of 1.
Beulah Durairaj said:
2 years ago
VSWR = 1 + |ρ| / 1 - |ρ|.
Given: Zo, reactance value = -jZo..
That is ZL = 0 + (-jZo) = -jZo..
ρ= ( ZL - Zo) / ( ZL + Zo)
ρ = -jZo - Zo / -jZo + Zo.
Then take magnitude for ρ.
| ρ | = √ {(-jZo)2 + ( -Zo)2 }/(-jZo)2 + (Zo)2 }
| ρ | = √ { ( Zo)2 + (Zo)2 }/{ (Zo)2 + ( Zo)2 }
| ρ | = √(2 Zo)2/( 2Zo)2
| ρ | = √1 = 1.
VSWR = 1 + | ρ | / 1 - | ρ|
VSWR = ( 1 + 1) / (1 - 1)
VSWR = 2 / 0 = INFINITY.
Given: Zo, reactance value = -jZo..
That is ZL = 0 + (-jZo) = -jZo..
ρ= ( ZL - Zo) / ( ZL + Zo)
ρ = -jZo - Zo / -jZo + Zo.
Then take magnitude for ρ.
| ρ | = √ {(-jZo)2 + ( -Zo)2 }/(-jZo)2 + (Zo)2 }
| ρ | = √ { ( Zo)2 + (Zo)2 }/{ (Zo)2 + ( Zo)2 }
| ρ | = √(2 Zo)2/( 2Zo)2
| ρ | = √1 = 1.
VSWR = 1 + | ρ | / 1 - | ρ|
VSWR = ( 1 + 1) / (1 - 1)
VSWR = 2 / 0 = INFINITY.
Vineet said:
6 years ago
In that expression of VSWR, it is the magnitude of reflection coefficient |ρ|.
Roli said:
7 years ago
Reflection coefficient is ρ.
Guru said:
7 years ago
What's that RHO?
Vinay said:
7 years ago
How? Explain it in clear.
SWETHA said:
7 years ago
VSWR = (1 + rho)/(1 - rho),
rho = (ZL - Z0)/(ZL + Z0).
rho = (ZL - Z0)/(ZL + Z0).
SWETHA said:
7 years ago
VSWR = (1 + rho)/(1 - rho),
rho = (ZL - Z0)/(ZL + Z0).
rho = (ZL - Z0)/(ZL + Z0).
Gurpreet kaur said:
8 years ago
@Faizz.
VSWR means Voltage Standing Wave Ratio = (1 + |rho v|) / (1 - |rho v|).
Here (rho v) is (reflected power)/(incident power).
VSWR means Voltage Standing Wave Ratio = (1 + |rho v|) / (1 - |rho v|).
Here (rho v) is (reflected power)/(incident power).
Faizz said:
8 years ago
Can I get some information about VSWR?
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