EBK FUNDAMENTALS OF APPLIED ELECTROMAGN
7th Edition
ISBN: 8220100663659
Author: ULABY
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 24P
A half-wave dipole TV broadcast antenna transmits 1 kW at 50 MHz. What is the power received by a home television antenna with 3 dB gain if located at a distance of 30 km?
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3. Consider the circuit, in which R₁ = 10 KQ2, R2 =
5 KQ, R3 = 1 KQ, and RE = 8 KQ. The supply
voltages are +Vcc = 10 V and -VEE = -5 V. Other
parameters are ẞF = 100, VBE(On) = 0.7 V, and
VCE(Sat) 0.2 V. Rc value will be specified later.
(a) (3 points) Draw the dc equivalent circuit of the
circuit.
VI
+Vcc
Rc
R2
RI
R₁
RE
-VEE
υο
R3
(b) Find the Thevenin equivalent voltage source VEQ and input resistance REQ of the DC
equivalent circuit. Show your work.
+Vcc
Rc
UC
VEQ
www
REQ
VE
VEQ =
REQ =
ΚΩ
RE
VEE
5. Consider the ac equivalent circuit of an
amplifier, where RE = 1 KS2, gm = 0.05 S, and
Υπ= 2Κ Ω.
(a) Redraw the ac equivalent circuit using the
hybrid-pi small signal model for BJTS.
Include ro in the model.
R₁
ww
Vi
RB
ww
+
RL
Vo
RE
(b) Find the terminal resistance RIB using the circuit obtained in (a). Ignore ro. Show your
work. (Don't use formula for RiB.)
4. Consider the circuit. Use the symbol ||
to indicate the parallel of resistors in the
following questions.
(a) Express the input resistance Rin in terms of
the terminal resistance and other necessary
resistor values. (In other words, RiB, Ric, and
RIE are given.)
C₁
R₁
R₂
+Vcc
Rc
C3
R3
C2
ی
RE
-VEE
(b) Express the output resistance Rout in terms of the terminal resistance and other necessary
resistor values. (In other words, RiB, Ric and RiE are given.)
(c) Express the voltage gain A₁ = ∞ in terms of terminal voltage gain Avt, the terminal
Vi
resistance, and other necessary resistor values. (Avt, RiB, Ric and R₁E are given.)
+51
Chapter 9 Solutions
EBK FUNDAMENTALS OF APPLIED ELECTROMAGN
Ch. 9.1 - What does it mean to say that most antennas are...Ch. 9.1 - What is the radiated wave like in the far-field...Ch. 9.1 - In a Hertzian dipole, what is the underlying...Ch. 9.1 - Outline the basic steps used to relate the current...Ch. 9.1 - A 1 m long dipole is excited by a 5 MHz current...Ch. 9.2 - Prob. 5CQCh. 9.2 - What is the magnitude of the directivity of an...Ch. 9.2 - An antenna has a conical radiation pattern with a...Ch. 9.2 - Prob. 3ECh. 9.3 - What is the physical length of a half-wave dipole...
Ch. 9.3 - How does the radiation pattern of a half-wave...Ch. 9.3 - How does the radiation efficiency of a...Ch. 9.3 - Prob. 4ECh. 9.3 - Prob. 5ECh. 9.5 - Prob. 6ECh. 9.5 - At 100 MHz, the pattern solid angle of an antenna...Ch. 9.6 - If the operating frequency of the communication...Ch. 9.6 - Prob. 9ECh. 9.6 - Prob. 10ECh. 9.8 - Verify that Eq. (9.86) is a solution of Eq. (9.85)...Ch. 9.8 - Prob. 12ECh. 9.8 - What condition must be satisfied in order to use...Ch. 9.8 - Derive an expression for the array factor of a...Ch. 9.8 - Prob. 15ECh. 9.11 - Prob. 11CQCh. 9.11 - Prob. 12CQCh. 9.11 - Prob. 13CQCh. 9.11 - Prob. 14CQCh. 9.11 - Prob. 15CQCh. 9 - A center-fed Hertzian dipole is excited by a...Ch. 9 - A 50 cm long center-fed dipole directed along the...Ch. 9 - Prob. 3PCh. 9 - Determine the following: (a) The direction of...Ch. 9 - Repeat Problem 9.4 for an antenna with...Ch. 9 - A 2 m long center-fed dipole antenna operates in...Ch. 9 - Repeat Problem 9.6 for a 20 cm long antenna...Ch. 9 - Prob. 9PCh. 9 - An antenna with a radiation efficiency of 90% has...Ch. 9 - Prob. 11PCh. 9 - The normalized radiation intensity of a certain...Ch. 9 - Repeat Problem 9.6 for a 1 m long half-wave dipole...Ch. 9 - Prob. 14PCh. 9 - A 50 cm long dipole is excited by a sinusoidally...Ch. 9 - Prob. 16PCh. 9 - For a dipole antenna of length l = 3/2, (a)...Ch. 9 - Prob. 18PCh. 9 - Prob. 19PCh. 9 - Prob. 20PCh. 9 - A car antenna is a vertical monopole over a...Ch. 9 - Determine the effective area of a half-wave dipole...Ch. 9 - A 3 GHz line-of-sight microwave communication link...Ch. 9 - A half-wave dipole TV broadcast antenna transmits...Ch. 9 - A 150 MHz communication link consists of two...Ch. 9 - Consider the communication system shown in Fig....Ch. 9 - The configuration shown in Fig. P9.27 depicts two...Ch. 9 - Prob. 28PCh. 9 - The configuration shown in Fig. P9.29 depicts a...Ch. 9 - Prob. 30PCh. 9 - Prob. 31PCh. 9 - A uniformly illuminated rectangular aperture...Ch. 9 - An antenna with a circular aperture has a circular...Ch. 9 - Prob. 34PCh. 9 - Prob. 35PCh. 9 - Prob. 36PCh. 9 - Prob. 37PCh. 9 - Prob. 38PCh. 9 - Prob. 39PCh. 9 - Prob. 40PCh. 9 - Find and plot the normalized array factor and...Ch. 9 - Prob. 44PCh. 9 - A three-element linear array of isotropic sources...Ch. 9 - An eight-element linear array with /2 spacing is...Ch. 9 - A linear array arranged along the z axis consists...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 2. ẞ 100, VBE(on)= 0.7 V, and VCE(sat) = 0.2 V for the BJT. We want to find the Q-point through the following steps. Show your work. a) Find the bias voltage VTH Using Thevenin's equivalent circuit. R1|| R2 www +5 V R₁ = 20 k IB VTH Answer: VTH = V b) Find the base current voltage IB. www. Answer: IB = μA (note the unit.) c) Find the collector voltage Vc (with reference to the ground). RC= 2.3 k B E R₂ = 30 k -5 V www R₁ = 5 ΚΩ ww AHI› RE= 5 ΚΩarrow_forward3. Consider the circuit, in which R₁ = 10 KQ2, R2 = 5 KQ, R3 = 1 KQ, and RE = 8 KQ. The supply voltages are +Vcc = 10 V and -VEE = -5 V. Other parameters are ẞF = 100, VBE(On) = 0.7 V, and VCE(Sat) 0.2 V. Rc value will be specified later. (a) (3 points) Draw the dc equivalent circuit of the circuit. VI +Vcc Rc R2 RI R₁ RE -VEE υο R3 (b) Find the Thevenin equivalent voltage source VEQ and input resistance REQ of the DC equivalent circuit. Show your work. +Vcc Rc UC VEQ www REQ VE VEQ = REQ = ΚΩ RE VEEarrow_forwardThe solution is with a pen and paper. Really not smartarrow_forward
- 1. Consider the following mechanical system. Obtain the differential equation model for the system. Write the transfer function of the system also. Note here, input u(t) is force and output x(t) is the displacement of the mass. x (Output) k1 k2 www u(t) m (Input force) No frictionarrow_forwardNO AI PLEASEarrow_forward2. Consider the following mechanical system with two masses. Find the differential equation model for the system. Find the transfer functions X1(s) and U(s) Note, in the figure, x₁ and x2 are displacements and u is the force. X2(s) U(s) also. k₁ www + b₁ " x1 k2 kz www mi www m2 Đ b₂arrow_forward
- 4. Find the transfer function H(s) = = Vo(s) V₁(s) for the following circuit. Vi R₁ ww A R₂ ww Voarrow_forwardAnswer the following questions. Take help from ChatGPT to answer these questions (if you need). But write the answers briefly using your own words with no more than two sentences and make sure you check whether ChatGPT is giving you the appropriate answers in our context. A) Write Newton’s second law of motion. B) What is a dashpot? C) What is Hooke’s law? Why there is a negative sign? D) Write the voltage and current equation for an Ideal Op-amp.arrow_forward3. Find the differential Equation model for the following electrical circuit. Write the transfer function also. Here, input u(t) is a current source and output y(t) is the current through the resistor R. u(t) (I) 州 BRarrow_forward
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