Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Chapter 14, Problem 14.27P
Consider an n-element broadside linear array. Increasing the number of elements has the effect of narrowing the main beam. Demonstrate this by evaluating the reparation in
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Q. (a)Two nicols are first crossed and then one of them is rotated through 600. Calculate the percentage of incident light transmitted.
Q. (b)Two nicols are oriented with their principal plane making an angle of 600.What percentage of incident unpolarized light will pass through the system?
Q.The signal retrieved in an optical fiber reduces at its output to one-tenth of its input power. What is the overall attenuation? What shall be the power at output in a fiber having loss3 db/km?
1) The field of view for a step index optical fiber increases
a) Relative refractive index difference A decreases.
b) Relative refractive index difference A increases.
c) Core diameter increases.
d) Cladding diameter decreases.
2) The coupling efficiency between the optical source and the fiber depends on:
a) Radiation pattern of the source.
b) Numerical aperture of the fiber
c) Longitudinal displacement between the source and the fiber. d) All of the above.
3) A transverse electric mode in a cylindrical dielectric guide is represented by:
a) TE (m
b) TM
c) HE Im
4) The maximum transmitted bit rate over an optical fiber depends on:
a) Attenuation constant x
c) Coupling coefficient n
5) Single Mode Fiber has the following advantage:
a) Simple handling
c) Large core diameter
m
b) Dispersion coefficient M.
d) None of the above
b) Low dispersion
d) Small Mode field diameter.
6) The following optical fiber type has the largest Bandwidth.
a) Single Mode Step Index fiber
c) Multimode Graded…
Determine the cutoff wavelength for a step-index fiber to exhibit
single-mode operation when the core refractive index is 1.46 and the
core radius is 4.5 um, with the relative index difference of 0.25 %.
Chapter 14 Solutions
Engineering Electromagnetics
Ch. 14 - A short dipole-carrying current I0 cos t in the az...Ch. 14 - Prepare a curve, r vs. in polar coordinates,...Ch. 14 - Prob. 14.3PCh. 14 - Write the Hertzian dipole electric field whose...Ch. 14 - Prob. 14.5PCh. 14 - Prob. 14.6PCh. 14 - Prob. 14.7PCh. 14 - Prob. 14.8PCh. 14 - A dipole antenna in free space has a linear...Ch. 14 - Prob. 14.10P
Ch. 14 - A monopole antenna extends vertically over a...Ch. 14 - Find the zeros in for the E-plane pattern of a...Ch. 14 - Prob. 14.13PCh. 14 - For a dipole antenna of overall length 2l=,...Ch. 14 - Prob. 14.15PCh. 14 - Prob. 14.16PCh. 14 - Consider a lossless half-wave dipole in flee...Ch. 14 - Prob. 14.18PCh. 14 - Prob. 14.19PCh. 14 - A two-element dipole array is configured to...Ch. 14 - Prob. 14.21PCh. 14 - Prob. 14.22PCh. 14 - Prob. 14.23PCh. 14 - Prob. 14.24PCh. 14 - Prob. 14.25PCh. 14 - Prob. 14.26PCh. 14 - Consider an n-element broadside linear array....Ch. 14 - A large ground-based transmitter radiates 10 kW...Ch. 14 - Signals are transmitted at a 1-m carrier...Ch. 14 - Prob. 14.30P
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- 2. A He-Ne laser (543 nm) illuminates a lens with f=6 cm and diameter d=2.66 cm. Calculate and plot the MTF of the lens assuming this is a perfect diffraction limited system. Plot this from 0 frequency to just past the cutoff frequency. Calculate the cutoff frequency as part of this.arrow_forwardLecture 8 Examples for Distortion in OF Example: Let A graded index fiber with a parabolic refractive index profile core has a refractive index at the core axis of 1.5 and a relative index difference of 1%. Estimate the maximum possible core diameter which allows single-mode operation at a wavelength of 1.3 µm.arrow_forwardFor dominant mode propagation in TE mode, if the rectangular waveguide has a broader dimension of 31.14 mm , then the cut-off wave number: a) 100 b) 500 c) 50 d) 1000arrow_forward
- Calculate the guided intrinsic impedance at 20GHz for the lowest order mode of the rectangular waveguide wit dimensions a=0.7 in and b=0.3 in. Take relative permittivity as 2.76arrow_forward*:For a certain mode, in a rectangular waveguide, propagation occurs for signals Information are not sufficient to decide O Whose frequency is above the cut off frequency Whose frequency is below the cut off frequency Depending on the dimensions of the waveguide and dielectric O The dominant mode of propagation is preferred with rectangular waveguides * because we can use air as dielectric O it is easier than other modes and leads to smallest dimension of waveguide it is easier than the other modes it leads to smallest dimension of waveguide none of metionedarrow_forwardplease provide a reflection on this problem.arrow_forward
- Solve for Vs iR= 0.234sin (3000t-10 degrees)Aarrow_forwardThis subject is antenna and wave propagation of ece pls solve neatly and faster thanksarrow_forward2. A symmetric dielectric slab waveguide is to guide light at wavelength A= 1.30 µm. The slab thickness is to be d = 5.00 um, and the refractive index of the surrounding material is n2 = 1.450. %3D Determine the maximum allowable refractive index of the slab material that will allow single TE and TM mode operation.arrow_forward
- 1. In an isotropic source, the directivity is unity because No one of them Uo, U and Umax are equal to each other Uo, U and Umax are different from each other 2. If the radiation lobe in a direction different form the intended lobe. the lobe called back lobe Major lobe side lobe 3. If the radiating property of an antenna is best in some directions than in others, this called Omnidirectional Radiator Directional Radiator Isotropic Radiator.arrow_forwardA single mode fibre is to be dimensioned. The normalised frequency is 80 % of the maximum allowed for single mode condition. The relative refractive index difference is 0.005 and the refractive index of the core is 1.5. The wavelength is 1.5 µm. A. Determine the radius of the core. B. If the number of modes supported by this fiber is 5. Determine the radius of the core.arrow_forwardWhat does the TE mean? Why does one have a 10 as subscript and the other mn? What is a broad and short dimension and a rectangular waveguide?arrow_forward
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