Exercise: Microwave Communication

Questions for: Microwave Communication

In the given figure forward voltage wave has a magnitude
A:
90 V
B:
60 V
C:
30 V
D:
10 V
Answer: C
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The word 'LORAN' means
A:
long range navigation
B:
long range TV transmission
C:
long range cable transmission
D:
either (b) or (c)
Answer: A
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A 75 ohm line is first short terminated and minima locations are noted. Then the short is replaced by resistive load and minima location are again noted. If minima location are not altered and VSWR is 3, the value of resistive load is
A:
25 Ω
B:
50 Ω
C:
225 Ω
D:
250 Ω
Answer: C

rv and VSWR .

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Assertion (A): Microstrip is very commonly used in microwave integrated circuits.

Reason (R): Microstrip has an easy access to the top-surface so that active and passive discrete components can be easily mounted.

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: A

A Microstrip line has a single dielectric substratc with ground plane on one side and a strip on the other face.

Its special feature is easy access to top surface so that minor adjustments can be made after circuit fabrication.

The high dielectric constant of the substrate reduces guide wavelength and circuit dimensions.

A microstrip line is the most commomly used transmission structure for microwave integrated circuits.

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In the given figure shows the equivalent circuit of a magic tee. If all ports are matched
A:
nE = nH = 2
B:
nE = nH = 0.707
C:
nE = 2, nH = 0.707
D:
nH = 0.707, nH = 2
Answer: A
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