Fundamentals Of Applied Electromagnetics
7th Edition
ISBN: 9781292082448
Author: Fawwaz T Ulaby Umberto Ravaioli
Publisher: Pearson Education Dorling Kindersley
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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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Chapter 9 Solutions
Fundamentals Of Applied Electromagnetics
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
- If the electric field at a far zone point 15 km away from an antenna is 25mV/m, then what is value at a point 25 km away in the same direction.arrow_forwardA broadcasting station uses two vertical antennas spaced by (lambda/4) apart and energized by currents of equal amplitude differing in phase by 90 degrees of advance. Determine the expression of the electric field intensity and graph its radiation pattern.arrow_forwardIf the directivity of an antenna is 25 dB at 2.5 GHz, then what will be the effective aperture of the antenna?arrow_forward
- An antenna transmits 24.5W and has a gain of 16.8dB. What is the power density at a distance of 323 meters in the maximum radiation direction?arrow_forwardA monopole antenna is excited using a sinusoidal current distribution. If the antenna is transmitting at a frequency of 10 GHz and length of the antenna is one-fourth of the wavelength, then what will be the value of the radiation resistance of the monopole antenna?arrow_forwardAn airplane flying in the sky uses an antenna to communicate with air traffic control tower locating 20 km (point-to-point distance) away from the airplane. The antenna has a time-averaged total power of 50 kW and works at the frequency of 118 MHz. Assume the radiation intensity of the antenna is uniform in all directions. Determine the amplitude of the electric field signal received by the control tower.arrow_forward
- An antenna used for transmitting has a power gain of 20, directive gain of 22, and an input power of 200 W. Determine: 1.EIRP in W, dBm and dBW. 2.Power density at a distance of 5 km from the antenna along the direction of maximum radiation. 3.Antenna efficiency 4. Radiated power from an antenna 5.Radiation resistance and antenna effective resistance if current at feedpoint is 2 A.arrow_forwardA vertical grounded antenna is constructed to operate at 20 MHz. What will be its radiation resistance if the effective antenna height is 65 m?arrow_forwardWhat is the effective radiated power of a television broadcast station if the output of the transmitter is 1000 W, an antenna transmission line loss is 50 W, and the antenna power gain is 3?arrow_forward
- A grounded vertical antenna is fed at the bottom by a current (rms) of 32 A. The wavelength of radiation is 3 m. If the rms electric field produces by the antenna is 9 mV/m at 100 km away, then estimate the effective height of the antenna.arrow_forwardA transmitting antenna with an effective height of 10 m has 50 A current at the base. If the frequency of transmission is 600 MHz, then find out the transmitted power.arrow_forwardIf a half wave dipole antenna has a peak antenna current of 10 A, then estimate the power radiated by the antenna.arrow_forward
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How does an Antenna work? | ICT #4; Author: Lesics;https://www.youtube.com/watch?v=ZaXm6wau-jc;License: Standard Youtube License