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General Topics Articles
Page 24 of 35
What is the Babinet's principle which is the basic for Slot Antenna?
Babinet’s Principle is actually the principle used in optics. According to its definition, “When the field behind a screen with an opening is added to the field of a complementary structure, the sum is equal to the field when there is no screen”The images clearly explain the principle. In all the regions, which are non-collinear with the beam, the above two screens, in figure 1 & 2, produce the same diffraction pattern.Case1Consider a light source and a conducting plane (field) with an aperture before a screen. The light does not pass through the opaque area but passes through the aperture.Case2Consider ...
Read MoreHow does the Microstrip antenna work?
Microstrip antennas are the low-profile antennas. A metal patch mounted on a ground level with a dielectric material in-between constitutes a Microstrip or Patch Antenna. These are very low size antennas having low radiation. The patch antennas are popular for low profile applications at frequencies above 100MHz.Construction and workingThe microstrip consists of a very thin metallic strip placed on a ground plane with a dielectric material in-between. The radiating element and feed lines are placed by the process of photo-etching on the dielectric material. Usually, the patch or microstrip is chosen to be square, circular or rectangular in shape for ...
Read MoreWho was the first person on Earth according to Hindu mythology?
According to Matsyapurana, the first person on this Earth is Manu. The Sanskrit term Maanav meaning a human was derived from the name Manu denoting his children. Manu was the son of Prajapati (another name of Brahma) and Shatrupa (another name of Saraswati). God created Ananti as the wife of Manu. These two are said to be the parents of this world according to Hindu Mythology.Manu and ManvantaraManu is considered the author of ancient Sanskrit code of law called Manu Smriti. Manu is the head of each Kalpa (Aeon), which consists of fourteen Manvantaraas. Each Manvantara lasts for the lifetime ...
Read MoreWhat is AMBUSH Marketing? Why is it known as surprise attack?
Ambush, as the name implies, is a surprise marketing. The term Ambush marketing was coined by Jerry Welsh, a marketing strategist. Ambush marketing is a type of marketing where the marketer associates the product with an event or property and the marketer is not directly or officially related to that event. This is a type of Guerilla marketing.To be more precise, we often happen to watch some advertisements which refer to some events or personalities indirectly without mentioning them officially. Such advertisements have a lot of impact on unknowingly.Grab the OpportunityThis kind of advertising is done by utilizing the opportunities ...
Read MoreWhat is Flaring and what are the different types of Horn antennas?
To improve the radiation efficiency and directivity of the beam, the waveguide should be provided with an extended aperture so as to make the abrupt discontinuity of the wave into a gradual transformation, so that all the energy in the forward direction gets radiated. This can be termed as Flaring. Flaring is done to provide greater directivity and narrower beam width. The types of horn antennas depend on how they are flared.Sectoral HornThis type of horn antenna, flares out in only in one direction. Flaring in the direction of Electric vector produces the sectorial E-plane horn. As well, flaring in ...
Read MoreWhat are Guerrilla Marketing Strategies?
The concept of Guerrilla marketing was created by Jay Conrad Levinson. Traditional marketing involves advertising methods such as advertising on television, radio, print, and mail. Online marketing or Digital marketing is the type of advertising which we see today on websites, YouTube videos, blogs, etc. Whereas, Guerrilla Marketing is an inexpensive method that focuses more on reach rather than frequency. This style of marketing is effective for small businesses to advertise their product and services. One needs to have imagination, energy and time for this kind of advertising.Give an ImpactThis kind of advertising engages the customers with the product and ...
Read MoreWhat are plagiarism tools and which is best to use?
Plagiarism is the process of infringement which means presenting other’s work as one’s own. This is mostly done in the content field. The information from web pages, articles, blogs, books etc. is often copied by some to present it as their own work. As the process of content publishing online is increasing day-by-day there are many chances of having copied content, which can be either video, text or images.Google itPlagiarism tools help us identify that copied content. Usually, when we check on google to know whether this is genuine content, the copied part is immediately highlighted with the pages displaying ...
Read MoreWhat are the modes of operation in a helical antenna?
A helical antenna is another type of wire antenna, which is widely used for a higher range of broadband VHF and UHF applications. The frequency range of operation of the helical antenna is around 30MHz to 3GHz.Helical antenna or helix antenna is the antenna in which the conducting wire is wound in a helical shape and connected to the ground plate with a feeder line. It is the simplest antenna which provides circularly polarized waves and used in extra-terrestrial communications in which satellite relays etc., are involved.It consists of a helix of thick copper wire or tubing wound in the ...
Read MoreHow does an FM radio set work?
The FM receiver is the whole unit which takes the modulated signal as input and outputs the original audio signal. Radio amateurs are the initial radio receivers. They had got drawbacks such as poor sensitivity and selectivity.Selectivity is the selection of a particular signal while rejecting the others. Sensitivity is the capacity of detecting RF signal and demodulating it, while at the lowest power level. Both Selectivity and Sensitivity should be high for an FM receiver. To overcome these drawbacks of the ordinary receiver, the superheterodyne receiver was invented. This FM receiver consists of 5 main stages.RF Tuner SectionThe modulated ...
Read MoreWhat is a Yagi-uda antenna? What are its design specifications?
Yagi-Uda antenna is the most commonly used type of antenna for TV reception over the last few decades. It is the most popular and easy-to-use type of antenna with better performance, which is famous for its high gain and directivity. The frequency range in which the Yagi-Uda antennas operate is around 30 MHz to 3 GHz which belong to the VHF and UHF bands.Construction of Yagi-Uda AntennaA Yagi-Uda antenna was seen on top of almost every house during the 90's when we had only Doordarshan Channels. The parasitic elements and the dipole together form this Yagi-Uda antenna. It is seen ...
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