If the solid angle subtended by the main beam of an antenna is 0.5 steradian  then what will be the directivity of the antenna?

Q: A shirt vertical grounded antenna is designed to radiate at 10 MHz. What will be radiation…

A: Radiation resistance is a fictitious resistance. When an antenna radiates, the total power radiated…

Q: If the directivity of an antenna is 25 dB at 2.5 GHz, then what will be the effective aperture of…

A: The given values of directivity and frequency are:

Q: What will be the wavelength of a dipole antenna whose effective length is 8.5 m and radiation…

A: Given information: The effective length of a dipole antenna is le=8.5 m The radiation resistance of…

Q: An antenna with a VSWR of 1.5 is connected to a 50-92 transmission line. What is the reflected power…

A: Given: Voltage Standing Wave Ratio (VSWR) value of 1.5. The input power is 10 W   To calculate the…

Q: If the wavelength of a signal is 30 mm, then what is the phase constant  of the material when a…

A: Wavelength of the signal is 30 mm  Lambda = wavelength = 30 mm  Phase constant is betta    From…

Q: Which of the following modes cannot propagate in a rectangular waveguide? TE^(01) TM^(11) TM^(10)…

A:

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: Q1. Multiple Choice Questions (MCQ): 1. For a horn antenna, in which flaring is done only in one…

A: 1) For a horn antenna , in which flaring is done only in one direction is Sectoral antenna.…

Q: A thin dipole antenna having a length of one fifteenth of wavelength has a loss resistance of 2.5…

A: Antenna efficiency is a measure of how efficiently antenna can radiate. It can be expressed by the…

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: What will be the wavelength of a dipole antenna whose effective length is 8.2 m and radiation…

A: For an dipole antenna  Length=wavelength/2

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: For an antenna having a directivity of 40 dB, what will be the effective aperture if the frequency…

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

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

A: Given information: The power transmitted by the antenna is given as PT=10 W The gain of the…

Q: A 60 MHz plane wave comes from a lossless dielectric medium with a relative dielectric value of 1.96…

A:

Q: The figure below shows a radio-wave transmitter and a receiver separated by a distance d = 47.0 m…

A: Distance between the transmitter and the receiver d=47.0 m Height of the transmitter or the receiver…

Q: O Determine the smallert height that an infinitertinal dipole must be ploce above PEC with null…

A: We need to determine the smallest height that an infinitesimal dipole must be placed above PEC with…

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

A: The explanation is as follows.

Q: The radiation resistance of a dipole antenna is 355 ohm. What will be the efective length of the…

A: The radiation resistance of a dipole antenna can be expressed as

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: If a parabolic antenna is equipped with a 10 m diameter dish, then what will be the first null…

A: The angular separation between the two nulls on either side of the main lobe of the antenna's…

Q: 5. For a wave with its frequency below the cutoff of a waveguide, if you try to pump it into the…

A: We need to explain how the wave would behave inside and inside the waveguide aperture if its…

Q: What does the TE mean? Why does one have a 10 as subscript and the other mn? What is a broad and…

A:

Q: Question 19 While some ideal antennas are described as omnidirectional or isotropic, real antennas…

A: Ideal antenna has maximum radiation in all the directions. This is called isotropic radiator which…

Q: The gain of a paraboloid reflector antenna with circular aperture mouth is 1000 when the frequency…

A: Given information: The gain of the antenna system G=1000 The frequency of operation f=300 MHz From…

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

A:

Q: What is the number of cut-off waves of the dominant TE mode in a rectangular waveguide filled with…

A:

Q: What is the effective length of a half wave dipole with an operating frequency of 30GHz

A:

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: find the current required to radiate a power of 100W at 100MHz from 0.1 herztian dipole

A: Given, P= 100 W dL= 0.1 m f= 100 MHz

Q: The directivity for small dipole is

A: The directivity of an antenna is the ratio of the radiation intensity in a particular direction from…

Q: Show that the directivity of isotropic antenna is 1.

A: Directivity is a very important antenna parameter and it is used to understand how efficiently an…

Q: 15-10. Determine the effective radiated power for an antenna with directivity = 400 efficiency…

A: It is given that: D=400η=0.60Pin=50 W

Q: Q1) What antenna radiates equally in all ?directions Dipole antenna O Horizontal antenna O Vertical…

A: Isotropic antenna is the reference antenna to measure the various parameter for any antenna. It is a…

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: What will be the wavelength of a dipole antenna whose effective length is 8.5 mm and radiation…

A: The radiation resistance of a dipole antenna is given as Rrad=80π2hλ2 Ω--->(1) where h is the…

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: Answer quickly.   Antenna and Wave Propagation.   Antenna is supplied with a power of 10 W.…

A: The given data is as follows:-

Q: The directivity of an antenna is 12 dB. What will be the beam solid angle of the antenna? Express…

A: If D is the directivity of an antenna, then the directivity in decibels can be expressed as Here,…

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.