if the far field distance of a circular parabolic antenna at 200 MHz is 3.5 m...
if the far field distance of a circular parabolic antenna at 200 MHz is 3.5 m what is the diameter of the antenna in meters
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if the far
field distance of a circular parabolic antenna at 200 MHz is 3.5 m...
A horn antenna with an area of 4π cm² receives 8 µW/m² intensity from a distance transmitter. What intensity would it receive from reflection off a one-meter-diameter parabolic dish?
A horn antenna with an area of 4π cm² receives 8 µW/m² intensity from a distance transmitter. What intensity would it receive from reflection off a one-meter-diameter parabolic dish?
9. (6 points) An antenna engineer is asked to design a X/2 dipole antenna to operate at 450 MHz. (a) Calculate the leng...
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...
Radio station K5MC has a transmitting antenna with an impedance of 70-j40 ohms at 21.0 MHz. The distance from the transmitter to the antenna is 90 feet. Design a single- stub matching system for a lo...
Radio station K5MC has a transmitting antenna with an impedance of 70-j40 ohms at 21.0 MHz. The distance from the transmitter to the antenna is 90 feet. Design a single- stub matching system for a lossless line of 50 ohms so that the transmitter will be matched to the antenna system. Assume that the velocity of propagation along the line is 0.66c (c 3.108 meters per second). Be sure to give physical dimensions of the matching system 2.
Radio station...
The antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on...
the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (θ-90P) plane, if the antenna is (a) a Hertzian dipole of length-0.01 λ. (b) a short dipole of length-0.01 λ (e) a half-wave dipole.
the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (θ-90P) plane, if the antenna is (a) a Hertzian dipole...
A Hertzian dipole is to be used by an radio amateur at 30 MHz. The FCC...
A Hertzian dipole is to be used by an radio amateur at 30 MHz. The FCC regulations indicate that the radiated field at a distance 2/27 (you can assume this distance is in the far field) and at a direction of maximum intensity must be less than 15 2 uV/m a) What is the average power flow density in a direction of maximum intensity if the electric field is equal to 15 2 uV/m? b) What is maximum time-average radiated...
The voltage measured by a certain antenna is 5V for every V/m of the incident electric...
The voltage measured by a certain antenna is 5V for every V/m of the incident electric field at 100 MHz. What voltage (dBìV) at the antenna terminals corresponds to the FCC Class B limit at 100 MHz? At this antenna voltage, what voltage is measured by a spectrum analyzer when connected to the antenna by 200 ft of coaxial cable with 4.5 dB/100 ft of loss at 100 MHz. [Answer: 57.48 dBìV, 48.48 dBìV]
A circular loop of wire can be used as a radio antenna. If an 18.0 cm...
A circular loop of wire can be used as a radio antenna. If an
18.0 cm diameter antenna is located 2.50 km from a 95.0 MHz source
with a total power of 55.0 kW, what is the maximum emf induced in
the loop? Assume that the source radiates uniformly in all
directions.
у In vicinity of loop, wave propagates in +x-direction. E B Circular loop antenna E lies in xy-plane. В. In vicinity of loop, E has only a y-component...
A radio antenna broadcasts a 1.0 MHz radio wave with 25 kW power. Assume the radiation...
A radio antenna broadcasts a 1.0 MHz radio wave with 25 kW power. Assume the radiation is emitted uniformly in all directions. 1) what is the wave's intensity 30 km from the antenna 2) what is the electric field amplitude at this distance?
A radio antenna broadcasts a 1.0 MHz radio wave with 27 kW of power. Assume that...
A radio antenna broadcasts a 1.0 MHz radio wave with 27 kW of power. Assume that the radiation is omitted uniformly in all directions. (60 - 8.85 x 10-12 c/Nm)c- 3.00 x 10 m/s) Part A What is the wave's intensity 33 km from the antenna? Express your answer in watts per meter squared. 190 AED ? I- W/m Submit Request Answer Part B What is the electric field amplitude at this distance? Express your answer in volts per meter....
8. A radio station broadcasts at a frequency of 88.1 MHz. At a receiver some distance...
8. A radio station broadcasts at a frequency of 88.1 MHz. At a receiver some distance from the antenna, the maximum electric field of the electromagnetic wave detected is 6 x 10–3V/m. (a) What is the maximum magnetic field? (b) If Ē is in the y-direction and the wave propagtes in the x-direction, what is the direction of the B-field at that moment? (c) What is the wavelength of the electromagnetic wave?
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...
Radio station K5MC has a transmitting antenna with an impedance of 70-j40 ohms at 21.0 MHz. The distance from the transmitter to the antenna is 90 feet. Design a single- stub matching system for a lossless line of 50 ohms so that the transmitter will be matched to the antenna system. Assume that the velocity of propagation along the line is 0.66c (c 3.108 meters per second). Be sure to give physical dimensions of the matching system 2.
Radio station...
the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (θ-90P) plane, if the antenna is (a) a Hertzian dipole of length-0.01 λ. (b) a short dipole of length-0.01 λ (e) a half-wave dipole.
the antenna to generate an E field strength of 10 mV/m at a distance of 10 km from the antenna on the horizontal (θ-90P) plane, if the antenna is (a) a Hertzian dipole...
A Hertzian dipole is to be used by an radio amateur at 30 MHz. The FCC regulations indicate that the radiated field at a distance 2/27 (you can assume this distance is in the far field) and at a direction of maximum intensity must be less than 15 2 uV/m a) What is the average power flow density in a direction of maximum intensity if the electric field is equal to 15 2 uV/m? b) What is maximum time-average radiated...
A circular loop of wire can be used as a radio antenna. If an
18.0 cm diameter antenna is located 2.50 km from a 95.0 MHz source
with a total power of 55.0 kW, what is the maximum emf induced in
the loop? Assume that the source radiates uniformly in all
directions.
у In vicinity of loop, wave propagates in +x-direction. E B Circular loop antenna E lies in xy-plane. В. In vicinity of loop, E has only a y-component...
A radio antenna broadcasts a 1.0 MHz radio wave with 27 kW of power. Assume that the radiation is omitted uniformly in all directions. (60 - 8.85 x 10-12 c/Nm)c- 3.00 x 10 m/s) Part A What is the wave's intensity 33 km from the antenna? Express your answer in watts per meter squared. 190 AED ? I- W/m Submit Request Answer Part B What is the electric field amplitude at this distance? Express your answer in volts per meter....
8. A radio station broadcasts at a frequency of 88.1 MHz. At a receiver some distance from the antenna, the maximum electric field of the electromagnetic wave detected is 6 x 10–3V/m. (a) What is the maximum magnetic field? (b) If Ē is in the y-direction and the wave propagtes in the x-direction, what is the direction of the B-field at that moment? (c) What is the wavelength of the electromagnetic wave?
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