The gain of a paraboloid reflector antenna with circular aperture mouth is 1000 when the frequency is 300 MHz.  What will be the diameter of the circuler reflector mouth?

Q: An antenna has a loss resistance of 32 ohms, power gain of 30 and directivity equal to 42. What will…

A: Radiation efficiency of an antenna is defined as the ratio of power gain of the antenna to the…

Q: 2.5. How much microwave power is received by a 3-m² antenna if the elec- tric field at the antenna…

A: Given, The electric field at the antenna, E=10-5 Vm The magnetic field at the antenna, H=2.6×10-8 Am…

Q: Question: A parabolic reflector antenna has a diameter of 2 meters and a focal length of 1 meter.…

A: It is given that:

Q: Question A half-wave dipole antenna has Rjoss = 10. What is the antenna gain? | 1.48 )4.18 dB | 1.62…

A: solve prob,,,,

Q: The current measured at the base of a transmitting antenna is 220 amperes. The antenna is of…

A:

Q: 3- The half wave dipole is widely used in more applications compared to other linear antenna…

A: We need to tell about the half wave dipole antenna.

Q: What is the critical frequency for reflection at vertical incidence if the maximum value, of…

A: Although formula for critical frequency is given by  fC=9Nm  MHzwhere,Nm=maximum electron density…

Q: What will be the maximum effective aperture of a microwave antenna whose directivity is 900.

A: We know that The directivity or gain of an antenna is defined as the ratio of the maximum value of…

Q: 3- Half power beam width of infinitesimal dipole is a) 45 b) 180 c) 135 d) 90

A: Hertzian dipole have radiation patter as

Q: An antenna is mounted on a 2 meter rod that is held out of level so that the antenna is offset by…

A: Length of the rod, L = 2 meters.And,The antenna is offset by 0.4' from the bottom of the rod.

Q: If the first-null beamwidth FNBW is 20 degrees for an acoustic array in air at a frequency of 440…

A: Given First-null beamwidthFNBW1=20°At frequencyf1=440 HzFrequencyf2=880 Hz

Q: 6. For a given waveguide aperture, explain why the high-frequency component has a higher group…

A: Step-1> In a waveguide, the group velocity refers to the velocity at which the envelope of a…

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: If a small single-turn loop antenna has a radiation resistance of 0.04 2, how many turns are needed…

A: Resistance opposes the flow of current. The radiation resistance in antenna is caused by EM wave.…

Q: How can you convert the absorption spectrum into Transmittance peaks?

A: Convert the absorbance to transmittance by the formula: A=log10IoIwhere,A= Absorbance; I =…

Q: What is the Different between dipole antenna and half wave dipole antenna

A: The explanation is as follows.

Q: What is the cut-off wavelength of the TE03 mode in a rectangular waveguide filled with air and with…

A: The frequency below which attenuation occur and above which propagation occur is called cutoff…

Q: If the diameter of a parabolic reflector antenna is 1.3 m, then what will be the half power…

A: The half power beamwidth (HPBW) is defined as the angular separation between the two points found on…

Q: Consider a 90° corner reflector antenna with a half-wave dipole as the driving element and an…

A: The angle of the corner reflector antenna (θ) is given as 90o. Evaluating the area:

Q: Estimate the diameter of a paraboloidal reflector required to produce a beam of 15o width at a…

A: Since the frequency is given as 1.5 GHz, the value of the corresponding frequency will be

Q: For a horn antenna, the radiation resistance is 2500 ohms and the loss resistance is 100 ohms.…

A:

Q: Q1) What antenna radiates equally in all * ?directions Dipole antenna isotropic antenna Vertical…

A: The explanation is as follows.

Q: Radiation resistance of antenna is 2.5 ohm and the antenna efficiency is 30%. What will be the value…

A: Antenna efficiency is a measure of how an antenna radiates. It can be defined in the following way:

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: For a helical antenna, the radiation resistance is 250 ohms and the loss resistance is 50 ohms.…

A: Given: For a helical antenna, the radiation resistance is given as Rr=250 Ω and the loss resistance…

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: Directivity of antenna radiating at 15 MHz is 120. What will be effective aperture of the antenna?

A: Given information: The frequency of operation is f=15 MHz The directivity of the antenna is D=120

Q: A vertical grounded antenna can radiate only at 10 MHz frequency. If the radiation resistance of the…

A: The radiation resistance of a vertically grounded antenna can be expressed by the following…

Q: If the diameter of a parabolic reflector antenna is 1.3 m, then what will be the half power…

A: Given, Diameter d=1.3 m Wavelength λ=0.2 m

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: 7. Pyrheliometer is used to measure direct beam radiation and can be used to measure diffuse…

A:

Q: What will be the wavelength of an em wave whose frequency is 3.4 MHz

A: The frequency of the electromagnetic wave is 3.4 MHz=3.4×106 Hz

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: 5% and loss resistance of 21 Ω, what is the radiation

A:

Antenna Characteristics

The antenna is an important concept in the domain of electronics and communication engineering. An antenna forms an integral part of many commonly used devices such as wireless modems, routers, game controllers, mobile phones, bluetooth devices, and so on. In simple terms, any wireless communication makes use of antennas to serve the purpose. An antenna, also known by the term 'arial', is an electrical device that converts electrical signals into electromagnetic waves or electromagnetic waves into electrical signals. An antenna contains a transmission line usually made up of co-axial cable, it then receives the signals and converts them into electromagnetic waves, which are then transmitted via space into their required destination. A communication system essentially makes use of two antennas, a transmission antenna, which converts electrical signals into electromagnetic waves, and a receiving antenna, which receives the electromagnetic waves and converts them back into electrical signals.