Engineering Electromagnetics
9th Edition
ISBN: 9780078028151
Author: Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher: Mcgraw-hill Education,
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Question
Chapter 3, Problem 3.31P
To determine
The total charge within the region
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Determine the figure of merit for both DSB AM and FM, provided that the modulating signal is a single-tone signal.
+
Preemphasis
LHS
R
signal
L RHS
signal
Frequency
doubler
Pilot
tone
(a)
+
Preemphasis
Composite
baseband
spectrum
L+R
Pilot tone
L-R
(DSB-SC)
+
FM
modulator
f (kHz)
(b)
15 19 23
38
53
Lowpass
filter
Deemphasis
+
L
Audio
amplifier
FM
discriminator
Narrowband
filter
Frequency
doubler
Bandpass
R
Audio
✗
Deemphasis
+
filter
amplifier
(c)
and (c) FM stereo receiver.
FIGURE A.25 FM stereo broadcasting: (a) FM stereo transmitter, (b) spectrum of FM stereo signal,
4-3) Similar to Lathi & Ding, Prob. P.4.2-3
For a DSB-SC signal g(t) = 2m(t)cos(4000) transmitting each of the following messages,
(a) write an expression for G(f) and
(b) sketch the magnitude spectrum |G(f)], specifying the FWHM (full width at half-maximum) of any spectrum
peaks.
a)
m(t) = sinc²(100-50л)
b)
m(t)=400e-80,000r²
Chapter 3 Solutions
Engineering Electromagnetics
Ch. 3 - Prob. 3.1PCh. 3 - An electric field in space is E=(5z2/C0)azV/m....Ch. 3 - Consider an electric dipole in free space,...Ch. 3 - An electric field in free space is E=(5z3/0)z V/m....Ch. 3 - A volume charge distribution in free space is...Ch. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Use Gauss, law in integral form to show that an...Ch. 3 - A sphere of radius a free space contains charge of...Ch. 3 - An infinitely long cylindrical dielectric of...
Ch. 3 - Consider a cylindrical charge distribution having...Ch. 3 - The sun radiates a tota1 power of about 3.86...Ch. 3 - Spherical surfaces at r = 2, 4, and 6 m carry...Ch. 3 - Prob. 3.14PCh. 3 - Volume charge density is located as follows; pv=0...Ch. 3 - An electric flux density is given by D=D0aP, where...Ch. 3 - In a region having spherical symmetry, volume...Ch. 3 - State whether the divergence of the following...Ch. 3 - A spherical surface of radius 3 mm is centered at...Ch. 3 - A radial electric field distribution in free space...Ch. 3 - In a region exhibiting spherical symmetry,...Ch. 3 - (a) A flux density field is given as F1 = 5 az....Ch. 3 - (a) A point charge Q lies at the origin. Show that...Ch. 3 - In a region in free space, electric flux density...Ch. 3 - Within the spherical shell, 3D= 5(r-3)3a,C/m2 .(a)...Ch. 3 - If we have a perfect gas of mass density Px...Ch. 3 - Consider a slab of material containing a volume...Ch. 3 - Repeat Problem 3.8, but use .D= pv and take an...Ch. 3 - Prob. 3.29PCh. 3 - (a) Use Maxwells first equation. �. D=Pv, to...Ch. 3 - Prob. 3.31P
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