Homework Answers
Add Answer to:
The antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on...
Problem 3 A communications system operates at 300 MHz. What current is required at the center...
Problem 3 A communications system operates at 300 MHz. What current is required at the center of the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (0 90°) plane, if the antenna is: (a) a Hertzian dipole of length 0.01 λ. (b) a short dipole of lenugth-0.01 A (c) a half-wave dipole
A vertical receiving dipole antenna at a position P is 15 km away from a Hertzian...
A vertical receiving dipole antenna at a position P is 15 km
away from a Hertzian dipole antenna that is also placed vertically
(see figure below). The receiving antenna measures an E field equal
to 10 mV/m.
(a) What is the value of E that the receiving antenna will
detect at a height of 3 km above P?
(b) Assuming the receiving antenna can be tilted as it is moved,
in what direction must the receiving dipole be oriented in...
11.12 The amplitude of the electric field intensity of a half-wave dipole antenna at r 5 km and /6rad is 0.01 V/m in free space. If the operating frequency is 30 MHz, determine its length and the tot...
11.12 The amplitude of the electric field intensity of a half-wave dipole antenna at r 5 km and /6rad is 0.01 V/m in free space. If the operating frequency is 30 MHz, determine its length and the total power that it radiates. Alse, write express
11.12 The amplitude of the electric field intensity of a half-wave dipole antenna at r 5 km and /6rad is 0.01 V/m in free space. If the operating frequency is 30 MHz, determine its length...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length If such a dipole is placed along the z-axis with its midpoint at the origin, and if the current flowing through it is i(t) ż lo cosot, assume I to be sufficiently small so that the observation point is approximately equidistant to all points on the dipole; that is, assume RR then the corresponding magnetic field is described by: olk2 sin e...
Can someone please explain how to solve the problem below? 1. (10) A Hertzian dipole antenna...
Can
someone please explain how to solve the problem below?
1. (10) A Hertzian dipole antenna has a length of 5 mm and carries 100 MHz current of 2 Amps. Find the (a) magnitude of the E and H fields 1000 m away from the antenna at an angle = 30° and the radiated power, (b) Prad.
If the field strength is E = 9 V/m a distance of 1 m from the...
If the field strength is E = 9 V/m a distance of 1 m from the charge, what is the field strength E a distance of 3 m from the charge? E =
P21.4. A time-harmonic plane wave with an rms value of the electric field vector E - 10 mV/m prop...
P21.4. A time-harmonic plane wave with an rms value of the electric field vector E - 10 mV/m propagates in a vacuum, and is normally incident on a screen that totally absorbs the energy of the wave. Find the absorbed energy per square meter of the screen in one hour. (a) Wabs 1.95m.J. (b) WJ. (c) Wabs0.95mJ. abs2.95 m.
P21.4. A time-harmonic plane wave with an rms value of the electric field vector E - 10 mV/m propagates in a...
Question 1 The power radiated by a lossless antenna is 10 watts.
Question 1 The power radiated by a lossless antenna is 10 watts. The directional characteristics of the antenna are represented by the radiation intensity of U = 2cos3θ watts/unit solid angle. Find the (a) Maximum power density at a distance of 1000 m (assume far-field distance) (b) Maximum directivity (c) Maximum gain Question 2 In target-search ground-mapping radars it is desirable to have echo power received from a target, of constant cross section, to be independent ofits range. For one such application, the desirable radiation intensity...
Solve the following: a. Compare the current required to radiate 10W from a Hertzian dipole of...
Solve the following: a. Compare the current required to radiate 10W from a Hertzian dipole of length 0.12 and a current loop of radius 0.12. b. An isotropic antenna is radiating in free space. At a distance of 100m the antenna the field measured is 1V/m. i) Find the power density at this location; ii) Determine the total power radiated by the antenna
A uniform electric field collapses to zero from an initial strength of 0.6 MV/m in a...
A
uniform electric field collapses to zero from an initial strength
of 0.6 MV/m in a time 15 µs in the manner shown in Figure. 3. What
is the displacement current in Amperes through a 2.9 m2 region
perpendicular to the field during the time interval (a)?
0.6 (a) 04 (NV/m) 0.2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (8) Figwe 3 14 - A uniform electric field collapses to zero...
Problem 3 A communications system operates at 300 MHz. What current is required at the center of the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (0 90°) plane, if the antenna is: (a) a Hertzian dipole of length 0.01 λ. (b) a short dipole of lenugth-0.01 A (c) a half-wave dipole
A vertical receiving dipole antenna at a position P is 15 km
away from a Hertzian dipole antenna that is also placed vertically
(see figure below). The receiving antenna measures an E field equal
to 10 mV/m.
(a) What is the value of E that the receiving antenna will
detect at a height of 3 km above P?
(b) Assuming the receiving antenna can be tilted as it is moved,
in what direction must the receiving dipole be oriented in...
11.12 The amplitude of the electric field intensity of a half-wave dipole antenna at r 5 km and /6rad is 0.01 V/m in free space. If the operating frequency is 30 MHz, determine its length and the total power that it radiates. Alse, write express
11.12 The amplitude of the electric field intensity of a half-wave dipole antenna at r 5 km and /6rad is 0.01 V/m in free space. If the operating frequency is 30 MHz, determine its length...
1) A Hertzian dipole antenna is a short conducting wire carrying an approximately constant current over its length If such a dipole is placed along the z-axis with its midpoint at the origin, and if the current flowing through it is i(t) ż lo cosot, assume I to be sufficiently small so that the observation point is approximately equidistant to all points on the dipole; that is, assume RR then the corresponding magnetic field is described by: olk2 sin e...
Can
someone please explain how to solve the problem below?
1. (10) A Hertzian dipole antenna has a length of 5 mm and carries 100 MHz current of 2 Amps. Find the (a) magnitude of the E and H fields 1000 m away from the antenna at an angle = 30° and the radiated power, (b) Prad.
P21.4. A time-harmonic plane wave with an rms value of the electric field vector E - 10 mV/m propagates in a vacuum, and is normally incident on a screen that totally absorbs the energy of the wave. Find the absorbed energy per square meter of the screen in one hour. (a) Wabs 1.95m.J. (b) WJ. (c) Wabs0.95mJ. abs2.95 m.
P21.4. A time-harmonic plane wave with an rms value of the electric field vector E - 10 mV/m propagates in a...
Solve the following: a. Compare the current required to radiate 10W from a Hertzian dipole of length 0.12 and a current loop of radius 0.12. b. An isotropic antenna is radiating in free space. At a distance of 100m the antenna the field measured is 1V/m. i) Find the power density at this location; ii) Determine the total power radiated by the antenna
A
uniform electric field collapses to zero from an initial strength
of 0.6 MV/m in a time 15 µs in the manner shown in Figure. 3. What
is the displacement current in Amperes through a 2.9 m2 region
perpendicular to the field during the time interval (a)?
0.6 (a) 04 (NV/m) 0.2 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (8) Figwe 3 14 - A uniform electric field collapses to zero...
Most questions answered within 3 hours.
-
What is the effect on the P-value when a test is changed from a
two-tailed hypothesis...
asked 2 minutes ago -
I wish to estimate µ, the mean of a population. After I collect
and an-
alyze...
asked 30 minutes ago -
At a local university, you poll a group of 115 students and find
that 37 of...
asked 12 minutes ago -
Gladstone company tracks the number of units purchased and sold
throughout each accounting period but applies...
asked 15 minutes ago -
When determining if a molecule's configuration is E or Z, what
determines the higher priority groups?
asked 19 minutes ago -
13. What is the amount
of conversion cost transferred to finished goods? (Round
your intermediate calculations...
asked 21 minutes ago -
Sulfuric Acid is a "strong" acid, but only releases a single
proton when it dissolves. What...
asked 20 minutes ago -
The
second floor of a house is 6 m above the street level. How much
work...
asked 22 minutes ago -
What uncontrollable factor(s) contributed to Hong Kong Disney’s
poor performance during its first year?
asked 24 minutes ago -
You are interested in whether students that have a male
instructors perform differently on exams. To...
asked 36 minutes ago -
Discuss the following: The policies that promote economic
growth. Why are some countries more developed than...
asked 32 minutes ago -
I am supposed to reduce redundancy in the code and also make
unknown inputs, output "unknown"....
asked 38 minutes ago