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A two-element dipole array is configured to provide zero radiation in the broadside
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Engineering Electromagnetics
- The figure below shows a radio-wave transmitter and a receiver separated by a distance d = 47.0 m and both a distance h = 27.0 m above the ground. The receiver can receive signals both directly from the transmitter and indirectly from signals that reflect from the ground. Assume the ground is level between the transmitter and receiver and a 180° phase shift occurs upon reflection. Determine the longest wavelengths that interfere in the following ways. O Transmitter Receiver (a) constructively (b) destructivelyarrow_forwardanswer fastarrow_forwardI need the answer as soon as possiblearrow_forward
- Calculate the First Null Beamwidth and the gain of a parabolic reflector antenna. The diameter of the reflector is 5m and the antenna is transmitting at 100 MHz.arrow_forward1. A 4-element dipole array has element spacing of 2/2. The elements are excited by sources with the same magnitude but different phases as show in the figure below (y=0°). Assume the phase of element 1 to be zero. Sketch the resulting radiation pattern in the xy-plane using the graphical method. (hint: u = kodsin esind+ y where 0= 90° in xy plane.) 1 20° 2 Top View 3 4 مر 23 220 مردےarrow_forwardA- Calculate the incidence angle for the beam radiation on horizontal surface at 9:00 am (solar time) on 1 Dec and the location attitude is 28 ° N. Note: consider the hour angle is: 15 (12 - ST)arrow_forward
- Calculate the length in meter of a half-wave dipole for an operating frequency of 20 MHz assuming a velocity factor of 0.95.arrow_forward3- The half wave dipole is widely used in more applications compared to other linear antenna lengths, that is because a) It has high gain d) it has small size b) its easy matching to coaxial 75 Ohm cable c) low lossarrow_forward15min please to solutionarrow_forward
- A short vertical grounded antenna is designed to radiate at 10 MHz. Calculate the radiation resistance of the antenna of the effective height is 50 meters.arrow_forward2arrow_forwardCalculate 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_forward
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