Fundamentals of Electromagnetics with Engineering Applications
1st Edition
ISBN: 9780470105757
Author: Stuart M. Wentworth
Publisher: Wiley, John & Sons, Incorporated
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 8, Problem 8.34P
To determine
The amplitude of electric field and magnetic field for monopole antenna.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
The half wave dipole antenna height of transmitter is 175 m and antenna height of receiver
is 18 m. The transmitted wave has field strength of 0.17 V/cm at frequency 560 MHz.
Determine the field strength of tropospheric wave which is received at a distance of 69 km
Answer Choices:
a. 67.41 μV/m
b. 67.83 μV/m
C.
62.75 μV/m
d. 62.41 μV/m
Two antennas located at points A and B are broadcasting radio waves of frequency 96.0 MHz, perfectly in phase with each other. The two antennas are separated by a distance d= 6.20
m. An observer, P, is located on the x axis, a distance x= 84.0 m from antenna A, so that APB forms a right triangle with PB as hypotenuse. What is the phase difference between the
waves arriving at P from antennas A and B?
A
P
X
4.594x10-¹ rad
Computer's answer now shown above. You are correct. Previous Tries
Your receipt no. is 158-6031 >
Now observer P walks along the x axis toward antenna A. What is P's distance from A when he first observes fully destructive interference between the two waves?
1.152x10¹ m
Computer's answer now shown above. Incorrect. Tries 1/6 Previous Tries
If observer P continues walking until he reaches antenna A, at how many places along the x axis (including the place you found in the previous problem) will he detect minima in the
radio signal, due to destructive interference?
2.000…
An antenna radiates in free space and
12 sin 0
-cos(27 × 10°t – Br)a, mA/m
H
Now answer the following question
į. What is the frequency of the EM wave? What spectrum does it fall in?
ii. What is the direction of propagation of the wave?
iii. What is the polarization of the electric field/Magnetic field?
iv. What is the phasor expression of this electric field/Magnetic field?
v. Use Maxwell's equations determine the phasor expression of the magnetic
field.H or Electric field, E
[Consider there is no field component in the direction of propagation of the wave]
vi. Now determine the instantaneous expression of magnetic field, H (t)..
vii. What is the direction of propagation and polarization of the magnetic
field/electric field?
viii. Try to draw the propagation of this wave in a 3D system.
Chapter 8 Solutions
Fundamentals of Electromagnetics with Engineering Applications
Ch. 8 - Prob. 8.1PCh. 8 - What is the pattern solid angle and the...Ch. 8 - Sketch an appropriate cross section of the...Ch. 8 - Prob. 8.5PCh. 8 - Prob. 8.6PCh. 8 - Prob. 8.7PCh. 8 - Prob. 8.8PCh. 8 - Prob. 8.9PCh. 8 - Prob. 8.10PCh. 8 - Prob. 8.11P
Ch. 8 - Prob. 8.12PCh. 8 - Suppose in the far field for an antenna at the...Ch. 8 - Prob. 8.14PCh. 8 - Prob. 8.15PCh. 8 - Prob. 8.16PCh. 8 - How long is a 1.5 -long dipole antenna at 1.0 GHz?...Ch. 8 - Prob. 8.18PCh. 8 - Prob. 8.19PCh. 8 - Prob. 8.20PCh. 8 - Prob. 8.21PCh. 8 - Prob. 8.22PCh. 8 - Prob. 8.23PCh. 8 - Prob. 8.24PCh. 8 - Prob. 8.25PCh. 8 - Prob. 8.27PCh. 8 - Prob. 8.28PCh. 8 - Prob. 8.29PCh. 8 - Prob. 8.30PCh. 8 - Prob. 8.31PCh. 8 - How long is a 0.75 monopole antenna at 1.0 GHz?...Ch. 8 - Prob. 8.33PCh. 8 - Prob. 8.34PCh. 8 - Prob. 8.35PCh. 8 - Prob. 8.36PCh. 8 - Prob. 8.37PCh. 8 - Prob. 8.38PCh. 8 - Two small loop antennas, each oriented in the xy...Ch. 8 - Prob. 8.40PCh. 8 - Prob. 8.41PCh. 8 - Prob. 8.42PCh. 8 - A particular broadside antenna array consists of...Ch. 8 - Prob. 8.44PCh. 8 - Prob. 8.45PCh. 8 - Prob. 8.46PCh. 8 - Prob. 8.47PCh. 8 - Prob. 8.48PCh. 8 - Design an open-ended shunt-stub matching network...Ch. 8 - Prob. 8.50PCh. 8 - Prob. 8.51PCh. 8 - Prob. 8.52PCh. 8 - Prob. 8.53PCh. 8 - Prob. 8.54PCh. 8 - Prob. 8.55P
Knowledge Booster
Learn more about
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
- IInitial conditions are frequency 5 x106 Hz and current 1.5 A A magnetic far field of an antenna has the form B = Bosine/r sin(kr - wt)e+. a) What is the phase of the wave at r = 6m when t = 0. b) Find the associated electric field and show a method to check this.arrow_forwardA transmitting dipole antenna has an effective height of 61.4 m and the wavelength of radiation is 625 m. What will be the value of the radiation resistance of the antenna?arrow_forwardA rectangular waveguide with a horizontal length a = 2 cm and a vertical length b = 1.5 cm is filled with a material with a relative dielectric value of 4. What would be the cutoff frequency for the dominant mode? 3.75 GHz 4 GHz 5 GHz 6.56 GHzarrow_forward
- Multiple Choice Questions (MCQ): (15 M 1. For a horn antenna, in which flaring is done only in one direction is a) Conical antenna b) Sectoral antenna c) Pyramidal horn antenna d) Exponential horn antenna 2. Wave unaffected by night or day is a) Ground wave b) Skywave c) Space wave d) Tropospheric wave 3. When a wave is incident normally then the acceptable highest frequency at which signal can be returned is the a) critical frequency b) LUF c) optimum frequency d) dominating frequency 4. High frequency range is from? a. 0.3 to 3 MHz b. 3 to 30 MHz c. 30 to 300 MHz d. 3to 30 MHz 5. The actual permittivity of a medium whose relative permittivity is 5. a) 4.43*10-¹1F/m b) 4.43*10-¹2F/m c) 4.43*10¹¹F/m d) 4.43* 10¹2F/marrow_forward2.5. How much microwave power is received by a 3-m² antenna if the elec- tric field at the antenna is 10-5 V/m and the magnetic field is 2.6 x 10-8 A/ m?arrow_forwardA rectangular waveguide with a horizontal length a = 3 cm and a vertical length b = 2 cm is filled with a material with a relative dielectric value of 9. What is the frequency value at which a total of 4 modes begin to propagate? 3.54 GHz 1.25 GHz 2.8 GHz 3 GHzarrow_forward
- Calculate the beamwidth in degrees of a parabolic antenna with a diameter of 3 meters, an efficiency of 60% and operates at a frequency of 4GHzarrow_forwardQuasi-static electromagnetic field is the . none of the above time independent high frequency low frequency if the maximum dimension of an antenna is 0.15 m and the frequency is 1 GHz the distance 0.5 m represents. Fresnel field near field O Far fieldarrow_forwardQ2. True or False Questions: 1. In the normal mode, the radiation is perpendicular to the axis of helical antenna. 2. An ideal source in which the power is radiated equally in all directions is called as isotropic radiator. 3. The progressive phase shift of the end-fire array is 90°. 4. The log periodic antenna does not belong to a frequency-independent antenna. 5. The polarization of an electromagnetic wave refers to the orientation of the electric field component of the wave. substance:(Antenna and Propogation)arrow_forward
- Q2. True or False Questions: 1. In the normal mode, the radiation is perpendicular to the axis of helical antenna. 2. An ideal source in which the power is radiated equally in all directions is called as isotropic radiator. 3. The progressive phase shift of the end-fire array is 90°. 4. The log periodic antenna does not belong to a frequency-independent antenna. 5. The polarization of an electromagnetic wave refers to the orientation of the electric field component of the wave.arrow_forwarda) The electric field associated with an electromagnetic wave propagating in free space and arriving at a receiving antenna ve has a magnitude of 0.1 Vm-1 when it arrives at the receiving 280 antenna. The receiving antenna is at a distance of 25 km from a ½ dipole transmitting antenna with directivity D=1.64. The transmitting antenna has an efficiency of 95% and a radiation resistance of 73 Q. The receiving antenna is in the plane of the azimuth of the transmitting antenna. (i) Calculate the average power density at the receiving antenna. (ii) Calculate the power radiated from the transmitting antenna. outl (iii) Calculate the effective area, the gain and the loss resistance of the transmitting antenna. (iv) Calculate the power that must be delivered to the transmitting antenna to achieve the observed power density at the receiving antenna.arrow_forwardA circular-loop TV antenna with 0.02 m² area is in the presence of a uniform-amplitude 300 MHz signal. When oriented for maximum response, the loop develops an emf with a peak value of 30 (mV). What is the peak magnitude of B of the incident wave?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Introductory Circuit Analysis (13th Edition)Electrical EngineeringISBN:9780133923605Author:Robert L. BoylestadPublisher:PEARSONDelmar's Standard Textbook Of ElectricityElectrical EngineeringISBN:9781337900348Author:Stephen L. HermanPublisher:Cengage LearningProgrammable Logic ControllersElectrical EngineeringISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
- Fundamentals of Electric CircuitsElectrical EngineeringISBN:9780078028229Author:Charles K Alexander, Matthew SadikuPublisher:McGraw-Hill EducationElectric Circuits. (11th Edition)Electrical EngineeringISBN:9780134746968Author:James W. Nilsson, Susan RiedelPublisher:PEARSONEngineering ElectromagneticsElectrical EngineeringISBN:9780078028151Author:Hayt, William H. (william Hart), Jr, BUCK, John A.Publisher:Mcgraw-hill Education,
Introductory Circuit Analysis (13th Edition)
Electrical Engineering
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:PEARSON
Delmar's Standard Textbook Of Electricity
Electrical Engineering
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Cengage Learning
Programmable Logic Controllers
Electrical Engineering
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
Fundamentals of Electric Circuits
Electrical Engineering
ISBN:9780078028229
Author:Charles K Alexander, Matthew Sadiku
Publisher:McGraw-Hill Education
Electric Circuits. (11th Edition)
Electrical Engineering
ISBN:9780134746968
Author:James W. Nilsson, Susan Riedel
Publisher:PEARSON
Engineering Electromagnetics
Electrical Engineering
ISBN:9780078028151
Author:Hayt, William H. (william Hart), Jr, BUCK, John A.
Publisher:Mcgraw-hill Education,
How does an Antenna work? | ICT #4; Author: Lesics;https://www.youtube.com/watch?v=ZaXm6wau-jc;License: Standard Youtube License