Fundamentals of Applied Electromagnetics (7th Edition)
7th Edition
ISBN: 9780133356816
Author: Fawwaz T. Ulaby, Umberto Ravaioli
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 9.2, Problem 2E
An antenna has a conical radiation pattern with a normalized radiation intensity F(θ) = 1 for θ between 0° and 45° and zero for θ between 45° and 180°. The pattern is independent of the azimuth angle ϕ. Find (a) the pattern solid angle and (b) the directivity.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Question
A half-wave dipole antenna has Rioss = 1Q. What is the antenna gain?
O 1.48
O 4.18 dB
1.62
O Not enough information to answer
The gain of a parabolic reflector antenna is 1000 when the frequency is 300 MHz. If the mouth of the reflector aperture is circular, then what will be the aperture of the mouth?
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.
Chapter 9 Solutions
Fundamentals of Applied Electromagnetics (7th Edition)
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...
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
- I hope to write a simple summary so that I can save it because I have exams Difference between Hertz Antennas (half-wave) and Marconi (quarter-wave) Antennas.arrow_forwardShow that the directivity of isotropic antenna is 1.arrow_forwardQ1) Very low signal strength in antenna. * Antenna patterns O Major lobes O Minor lobes O Nullarrow_forward
- For a helical antenna, the radiation resistance is 250 ohms and the loss resistance is 50 ohms. Estimate the radiation efficiency of the antenna?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_forwardThe directivity if an antenna is 1.5. what will be the value of the beam solid angle of the antenna?arrow_forward
- If the diameter of a parabolic reflector antenna is 1.5 m, then what will be the half power beamwidth of the antenna? Assume the wavelength of radiation to be 0.5 m.arrow_forwardThe directivity of a half wave antenna is 1.642. what will be the effective apeeturenof the antenna if the wavelength is 0.2 m?arrow_forwardMultiple 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_forward
- 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?arrow_forwardThe progressive phase shift k =180, the direction of the main beam eo for a uniform linear array with d = λ is .........arrow_forwardAn array antenna has 6 half-wave driven elements that are separated by 1.5m and the resulting radiation is at right angles to the plane of the array. What is the resulting half-power beamwidth (rad) of this array antenna?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