What do you mean by antenna gain, Electrical Engineering

Assignment Help:

Q. What do you mean by Antenna gain?

Antenna gain depends on both shape and size. Dipole antennas, commonly used at lower radio frequencies, are made up of a rod or wire of length λ/10 to λ/2, and have an antenna-gain range of 1.5 to 1.64 (1.8 to 2.1 dB). Horn antennas and parabolic dishes (so named after their shapes) have much more gain at higher frequencies. A useful, although approximate, expression for gain is given by

1848_Dipole antennas.png

where λ is the wavelength being transmitted (or received), and Ae is the effective aperture or effective area of the antenna. Power amplifiers are needed to overcome the radio-transmission loss just as in a transmission-line system. Similar considerations hold for optical radiation, in which the electromagnetic wave takes the form of a coherent light beam.


Related Discussions:- What do you mean by antenna gain

What is the function of dma address register, What is the function of DMA a...

What is the function of DMA address register? Every DMA channel has one DMA address register. The function of this register is to keep the address of the starting memory locati

Use of n-channel jfet, Q. Use of N-channel JFET? Generally, N-channel J...

Q. Use of N-channel JFET? Generally, N-channel JFETs are more commonly used than P-channel. With no voltage applied between gate and source, the channel is a wide-open path for

State the features of washing machines, State the features of Washing machi...

State the features of Washing machines Microprocessor would be used to control the below features, for instance: - Water temperature -  Time for every cycle -  Wash cy

What is the function of 8254 programmable interval timer, What is the funct...

What is the function of 8254 Programmable Interval Timer? 8253 or 8254 Timer Description and Initialization PTI that is programmable Interval Timer/Counter) 8253

Geographic information system, Geographic Information System: Geograph...

Geographic Information System: Geographic Information System (GIS) is a computer system capable of assembling, manipulating, storing, and displaying geographically referenced

Clampers., hint on clamping as a project topic

hint on clamping as a project topic

Explain the effect of a dielectric on behaviour of capacitor, Explain the e...

Explain the effect of a dielectric on the behaviour of a capacitor. If two parallel plates are separated by a distance 'd' (meters) in vacuum and are kept at a potential diffe

Change management in power distribution, Change Management in Power Distrib...

Change Management in Power Distribution: Organisational change might be described as an organisation-wide effort to augment the effectiveness of an organisation through str

Illustrate about the digital televisions, Illustrate about the Digital tele...

Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd