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 14.17P
Consider a lossless half-wave dipole in flee space, with radiation resistance, Rrad = 73 ohms, and maximum directivity Dmax = 1.64. If the antenna carries a 1-A current amplitude, (a) how much total power (in watts) is radiated? (b) How much power is intercepted by a 1-m2 aperture situated at distance r = 1 km away? The aperture is on the equatorial plane and squarely faces the antenna. Assume uniform power density over the aperture.
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4)
This MCQ QUESTION FROM ANTENNA ENGINEERING course
Since b=2a=1 cm in a hollow rectangular waveguide, the operating frequency of the waveguide must be ........ GHz<f<......GHz for only the dominant mode to propagate?
2- Directivity is inversely proportional to......
(A) Beamwidth
(B) FNBW
(C) Beam area
(D) HPBW
Z so reflection coefficient is
12
4- What determines antenna polarization?
(A) The direction of the electric field vector
(B) The direction of the radiated wave
(C) The direction of the magnetic field vector (D) The frequency of the radiated wave
5- Antennas convert
-to-
(A) Electrical into electromagnetic
(B) electromagnetic into electrical
(C) Both A and B
(D) None of the these
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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- Consider a 90° corner reflector antenna with a half-wave dipole as the driving element and an element to corner spacing of lambda/2. Calculate the directivity:arrow_forward4) This MCQ QUESTION FROM ANTENNA ENGINEERING course.arrow_forwardWhat will be the power gain of a parabolic antenna with 10 m diameter dish and a feed of 10 GHz?arrow_forward
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