The gain of a parabolic reflector antenna is 1000 when the frequency is 300 MHz. If the mouth of the reflector aperture is circular, then what will be the aperture of the mouth?

Q: 2. At a certain time, the MUF for transmissions at an angle of incidence of 750 is 17 MHz. what the…

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Q: Two planes are 15 km apart and are in radio communication. The transmitting plane delivers 500…

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Q: Determine the height of an antenna that must be able to reach antennas at 1.5 m height up to 80 km…

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Q: A parabolic reflector antenna has a diameter of 2.7 m. The antenna operates at 700 MHz. Calculate…

A: If frequency of operation of an antenna is provided, then the corresponding wavelength can be…

Q: What is the height of a communications antenna required to cover a distance of 100km if it operates…

A: Antenna- Antenna is used to transmit or and receive signal which are propagating wirelessly.

Q: An earth station antenna has a circular aperture with a diameter of 6.5 m and an aperture efficiency…

A: We know direct formula for gain and beamwidth .

Q: Find the beam area of an antenna has a major lobe defined by the angles 0<0 <30 and 0< <60, compare…

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Q: а. A helical antenna is used to operate in the axial mode with a total number of 15 turn. For this…

A: Note: We are authorized to answer one question at a time since you have not mentioned which question…

Q: In a 3 element antenna array, the distance between the antenna elements is quarter of a wavelength.…

A: For array antenna configuration, the successive phase difference between the antenna elements can be…

Q: Calculate the number of elements, length of each element and spacing between the elements of log…

A: Given: The log periodic antenna has the following parameters: f1=70 MHzf2=320 MHzσ=0.132τ=0.762 To…

Q: In a broadside array of 10 isotropic radiators, equally spaced at distance of X/2, the beamwidth…

A: Given, In a broad side array, number of radiators, N = 10 Equally spaced at distance, d=λ2

Q: An antenna has a gain that is 19 times better than an isotropic antenna. Calculate the gain of this…

A: Given information: The gain of the antenna under test is 19 time more than the gain of an isotropic…

Q: ance of 5 W, measured at the feedpoint. Calculate the

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Q: A horn antenna is operated 8.2 to 12. 4 GHz. The aperture of the antenna is (L x W ) 32 x 42 mm.…

A: Explanation: a)

Q: A horn antenna with low side lobes has half-power beamwidths of 29 degree in both principal planes…

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Q: An antenna has a loss resistance of 25 ohms, power gain of 30 and directivity of 42. Calculate the…

A: The loss resistance, radiation resistance, power gain and directivity are related by the following…

Q: 10. (a) Find the current required to radiate a power of 100 W at 100 MHz from 0.1 Herztian dipole.…

A: Part (a): Given, Power =100 W, Frequency = 100 MHz 0.1 Hertzian dipole, Now, λ=cfλ=3×108100…

Q: A lossless resonant dipole antenna, has the pattern of the antenna is given approximately by U=Bo…

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Q: If an antenna has a beam solid angle of 0.05 steradian, then what will be the half power beam width…

A: In antenna terminology, half power beamwidth is defined as the angular separation between the two…

Q: What will be the EIRP of an antenna that transmits a power of 10 mW and has a gain of 15.75?

A: The effective isotropic radiated power (EIRP) is a quantity that is used to measure the amount of…

Q: 2. At a certain time, the MUF for transmissions at an angle of incidence of 750 is 17 MHz. what is…

A: Given that  MUF=17 MHz Angle of incidence=750 The critical frequency can be defined as  =Maximum…

Q: The directivity if an antenna is 1.5. what will be the value of the beam solid angle of the antenna?

A: Directivity of an antenna is a measure of how efficiently an antenna can radiate in a specified…

Q: An antenna has a directivity of 44 dB. What will be the beam solid angle of the antenna?

A: If the radiation intensity of an antenna is assumed to be constant, then all the power coming out of…

Q: Calculate the gain of a lossless antenna with circular aperture of diameter 3 meters at a frequency…

A: The solution is given below

Q: Calculate the maximum effective aparture of a microwave antenna which has directivity of 900.

A: Given data: The directivity of a microwave antenna is D=900. The maximum effective aperture of the…

Q: Radiated power by an antenna is proportional to the square of wavelength Select one: O True O False

A: Power radiations can be increased by using frequency of high power.

Q: Calculate the gain of a lossless antenna with circular aperture of diameter 3 meters at a frequency…

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Q: If the maximum dimension of an antenna is 0.15 m and the frequency is 1 * GHz the distance 0.5 m…

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Q: An antenna is transmitting a wavelength of 0.06 m. If the directivity of the antenna is 40, then…

A: The directivity (D) of an antenna depends on the effective aperture (Ae) of the antenna and the…

Q: If the effective height of an areal is 1/150th of the wavelength, then estimate its radiation…

A: The aerial is basically a wire antenna. The radiation resistance (Rr) of an aerial can be expressed…

Q: 4. If the diameter of isotropic antenna is Sem and wavelength is 10 cm, then the far-field region…

A: The helical antenna is also called helix antenna. There are two operating modes for the helical…

Q: Calculate the gain of a lossless antenna with circular aperture of diameter 3 meters at a frequency…

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Q: 7. What may occur when a directional antenna is operated at different frequencies within the band…

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Q: Antenna Radiation Efficiency is higher when: Select one: The loss resistance in the transmission…

A: Antenna radiation efficiency is the ratio of radiation resistance to the total resistance of the…

Q: A dish antenna has a gain of 108 at 300 MHz. What will be the diameter of the dish antenna?

A: Diameter (D) of a dish antenna depends on the gain of the antenna and the wavelength of radiation.…

Q: If a small single-turn loop antenna has a radiation resistance of 0.04 N, how many turns are needed…

A: In Antenna Array the group of radiating element produce radiation in one direction. . Its radiation…

Q: Radiated power by an antenna is inversely proportional to the square of wavelength Select one: O…

A: Solution: If we use high frequency signal in antenna then power radiated  will be increased.

Q: Determine the maximum distance between 18m high antenna transmitting 10W of power and a 10m high…

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Q: Calculate the gain of a lossless antenna with circular aperture of diameter 3 meters at a frequency…

A: We need to find out Gain for given antenna

Q: If the solid angle subtended by the main beam of an antenna is 0.5 steradian  then what will be the…

A: If the radiation intensity of an antenna is assumed to be constant, then all the power coming out of…

Q: Calculate the first null beamwidth of a parabolic reflector antenna with 5m diameter of aperture.

A: For any antenna, the first null beamwidth refers to the angular separation between the two nulls…

Q: A shortwave transmitter uses skywave propagation. What is the angle of incidence if the MUF is 25…

A: Given: For a shortwave transmitter using skywave propagation

Q: Calculate the First Null Beamwidth and the gain of a parabolic reflector antenna. The diameter of…

A: The beamwidth of a parabolic antenna is the angular difference between the point of maximum power…

Q: If the FNBW of a parabolic reflector antenna is 15o at 1.5 GHz then estimate the diameter of the…

A: For a parabolic reflector type antenna, the expression of First Null Beamwidth (FNBW) in degree can…

Q: We receive a signal from the Voyager spacecraft. The received power is 10-18 watts. The frequency of…

A: The solution is given below

Q: Calculate the front to back ratio of an antenna which radiates 3 kW in the most desired direction…

A: The front to back ratio (FBR) for an antenna is expressed as FBR=10log10P1P2 dB---&gt;(1) where P1…

Q: An antenna has a directive gain of 25 dB. If the antenna is transmitting at a frequency of 10 GHz,…

A: The directive gain of the antenna depends on the effective aperture of the antenna. The relation can…

Q: The radiation resistance and the loss resistance of a pyramidal horn antenna are 50.55 ohm and 20.23…

A: The radiation efficiency of an antenna depends on the radiation resistance (Rr) and the loss…

Q: 2. The E-field pattern (radiation intensity) of an antenna 0 < ø <360º, varies as follows: 0° < 0<…

A: The directivity of the antenna is given by the expression as shown below: