We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Distant line Flectric dipole antenna LCoscillator 5434.35
An array antenna consists of two identical half-wave dipole antenna elements. The array operates in air at 100 MHz. User A is in the azimuth plane of the array, on a line that makes 60° with the line defined by the antenna elements. The driving current has no phase shift. What is the shortest physical distance, d, between the antenna elements in the array that will ensure maximum signal strength in the direction of the user? I lew 600 d
Given that the radiation resistance for a short dipole antenna is 300Ω and the length is 200 mm, at what frequency would one expect this antenna to radiate?
Given that the radiation resistance for a short dipole antenna is 75Ω and the length is 217.6mm, at what frequency would one expect this antenna to radiate?
A dipole antenna, with a triangular current distribution, is used for communication with sub- marines at a frequency of 150 kHz. The overall length of the dipole is 200 m, and its radius is I m. Assume a loss resistance of 2 ohms in of the antenna including the loss resistance. The input reac- tance can be approximated by tan(xl/l) (b) Evaluate the radiation efficiency of the antenna. c) Evaluate the radiation power factor of the antenna. (d) Design a...
9. (6 points) An antenna engineer is asked to design a X/2 dipole antenna to operate at 450 MHz. (a) Calculate the length of the antenna if it is located in free space. (b) Calculate the magnetic field intensity, H, at a distance of 400km, polar position 0 = 30 degrees and current I = 2A (c) What value of the current I is needed for the total radiated power to equal 100 mW. (d) Determine the length of the...
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of the antenna is given approximately by U Bo sin30 Find the maximum absolute gain of the antenna. Answer. 2.3 dBi]
Exercise A lossless resonant half-wavelength dipole antenna, with input impedance of 73 ohms, is connected to a transmission line whose characteristic impedance is 50 ohms. Assuming that the pattern of...
A dipole antenna radiates electromagnetic waves. The frequency is f. (A) An observer measures magnetic field oscillations with amplitude Bo. Then what is the amplitude of electric field oscillations at that position? (B) Calculate the Poynting vector. [f = 1.7 Hz; Bo = 1.0 mT] (A) Submit Answer Tries 0/25 (B)
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...
An electric-dipole antenna, broadcasting microwave electromagnetic radiation for mobile communications, is located on the roof of a 111-m-high building and is oriented vertically. Two observers measure the signal strength (radiation intensity) from this antenna. Observer A is on the roof of another building, at the same height as the antenna and at a distance of 1.61 km from it. Observer B is on the street, with a direct-line distance of only 165 m from the antenna. What is the ratio...