Skip to main content

How does an antenna work??

                   Antenna

            
                Antenna is widely used in the field of telecommunication and we have already seen in many applications 
antenna receives the an electromagnetic waves and converts it to an electric signal or receive an electric signals and radiate it as an electromagnetic waves 
In this article we look science behind the antenna we have an electromagnetic waves how we converts to an electromagnetic wave 
                
Consider a positive and negative charge placed at a distance this arrangement know as dipole we know they can produce electric field assume this charges are oscillating (up and down) lets consider one electric field line the wave form formed at t=0 expands as shown after 1/8th time period

The wave front meet at a single point after then they produce another wavefront you can see in below image
In this manner separation and propagation wave front happen please note that this varying electric field will automatically Generate a varying magmatic field perpendicular to it. the wave propagation is sinusoidal in nature this is exactly happen in antenna for perfect transmission the length of antenna shall be half of the wavelength doing reverse process it can work as receiver
Now let's see some practice antenna and how they work

Yagi uda antenna

In past dipole antennas were used for tv reputation this complete stature is known as yagi uda antenna the dipole of antenna converts received signal into electrical signals this electrical signals carried by coaxial cable of TV unit .
Now a days we moved to dish TV antenna this consists of two main components 

 Dish tv antenna

Parabolic reflector ,low noise block ,down converter the parabolic fish receives the electromagnetic signal from satellite and focus then onto the LMBF
The voltage signal so generated is fed to signal processing such as filtration conversation from high to low frequency and amplification ... carried to tv with the help of coaxial cable in our mobile we have completely different antenna 

Mobile antenna


.a patch antenna consists of metallic patch or strip with a piece of dielectric material in between the length of metallic patch is half of the wavelength for proper transmission and reputation .
Thank you for reading this article.

Comments

Post a Comment

Popular posts from this blog

Brain-Computer Interfaces (BCIS).

   Brain-Computer Interfaces (BCIS). This is the example and possibility article which  BCIS will create the impact in below sectors.  1. Seamless Integration with AI:     Humans are connecting their minds to artificial general intelligences through advanced brain-computer interfaces. These interfaces enable real-time communication between the human brain and AI, granting access to vast amounts of information, problem-solving capabilities, and creative resources. This integration is revolutionizing fields like scientific research, software development, entrepreneurship, and art. Enhanced individuals can achieve perfect scores on IQ tests, viewing the world mathematically, deriving measurements, creating new datasets, and utilizing probability distributions to predict events. 2. Enhanced Access to Information:  B rain-computer interfaces provide constant access to petabytes of information, increasing memory exponentially. Users can summarize data fr...
Post a Comment
Read more

what is digital rupee in India

            DIGITAL RUPEE                                       Reserve bank of India RBI announced the launch of the first pilot for retail digital rupee or E-rupee on December 1st to start with the RBI has partnered with 4 banks including State Bank of India, ICICI bank, yes bank, HDFC bank first bank in Mumbai in Delhi Bengaluru and Bhubaneswar initially bank cover on closed user group pricing customers and merchants lets try and explain to you what exactly is digital rupee or e-rupee                                        as the  RBI explain the E-rupee  is a form of digital tokens that represents illegal trade and unlike Crypto currencies the digital rupee is issued in the same denominations as paper currency in points.  now how exactly will this...
Post a Comment
Read more

What happen when oxygen disappears for 5 seconds??

                                 Oxygen                                         imagine if all the oxygen was disappeared not forever just for 5 seconds, what will to the atmosphere, what would happen to the environment. take a deep breath the more you taking is 21% of oxygen in our atmosphere 78% being nitrogen, although it's not the most abundant gas in our atmosphere. It is the most important. Without oxygen, plants, animals, water and us humans wouldn't be where we are today. 5 seconds may not sound like a whole lot of time to be without oxygen. Most of us can go at least 30 seconds without taking a breath. So it would happen too fast for your body to even notice your breathing would actually remain normal.                          ...
Post a Comment
Read more