In a microwave coaxial cable the inner conductor radius is a and inner radius of

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Electronics and Communication Engineering ‣ Microwave Communication Comments

Question
In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE₁₁ mode the cut off wavelength is about
Options
A. a + b
B. p(a + b)
C. pa
D. pb

Correct Answer

p(a + b)

Microwave Communication problems

Search Results

2. For air filled circular waveguides
Options
A. the attenuation due to imperfect conducting walls is negligible
B. the attenuation due to imperfect dielectric is negligible
C. both the attenuation i.e. due to imperfect conducting walls and due to imperfect dielectric are significant
D. the total attenuation is almost zero

3. Consider the following statements about instrument landing system of aircraft
1. It ensures correct landing under conditions of low visibility.
2. It consists of runaway localizer, glide path equipment and marker beacons.
3. It is basically a blind landing system.
Which of above statements are correct?
Options
A. All
B. 1 and 2 only
C. 1 and 3 only
D. 2 only

4. As regards rectangular and circular waveguides
Options
A. both have infinite set of TE and TM modes
B. rectangular waveguide has infinite TE and TM modes but not the circular waveguide
C. circular waveguide has infinite TE and TM modes but not the rectangular waveguide
D. none of the above

8. A TR (transmitter receiver) tube has
Options
A. low loss for low power signals and high
B. high loss for low power signals and low loss for high level signal
C. low loss for both low level and high level signals
D. high loss for both low level and high level signals

9. Assertion (A): In TE₁₀ mode the cutoff frequency of rectangular waveguide is where a is the broad dimension and c is velocity of light.
Reason (R): TE₁₀ mode is the dominant mode in rectangular waveguide.
Options
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

Comments

More in Electronics and Communication Engineering: