How Dipole Antenna radiates in space in Antenna and Wave Propagation by Engineering Funda
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- čas přidán 13. 07. 2024
- In this video, i have explained How Dipole Antenna radiates in space by following outlines:
1. How Dipole Antenna radiates in space
2. Flaring of Transmission Line makes Dipole Antenna
3. Radiation of Dipole of Antenna
4. Reflection at Dipole Antenna
Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Antenna and Wave Propagation.
#HowDipoleAntennaradiatesinspace, #FlaringofTransmissionLinemakesDipoleAntenna, #RadiationofDipoleofAntenna, #ReflectionatDipoleAntenna, #AntennaandWavePropagation - Věda a technologie
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After 7:21: The E-field is vertical, not horizontal. The EM-wave propagates in the horizontal direction.
a wire radiates efield in that directin only
Tjakepzzz 👌👍 Sangatzzz
Very Cool 👌👍 Awesome
Hmmm...so since the uncancelled currents in the two elements are in phase with each other producing maximum amplitudes of current, periodically, then there will also be produced maximum amplitude magnetic fields corresponding to these current maximums in the wire. Similarly for the voltage maximum (periodic) and hence corresponding electric field strength maximums. But it is these magnetic and electric fields detatching from the antenna that constitutes radiation...i.e. an em field. That's why we want standing waves of current and voltage on the antenna I but not on the transmission line.
hello sir,can you please make a video of the satellite communication subject.
Because every EC students need it so you can make a video and placed into your app EF.
I understand nothing right from the start. What do you mean by "signal"? Is it the voltage or the current? Also, if the two wires are open, there is NO current. And the voltage at the ends of the wire will exactly be same as the supply voltage. So, what is reflected? I see nothing happening here. No electron flowing at all anywhere. No current. No signal. No quarter wave. No half-wave. NOTHING. Am I missing something here?
If you have 100 kilometer of wire, and you apply a voltage, will that voltage appear "instantly" at the other end? And if not, after how much time will it receive that voltage? This is an example of a transmission line, nothing can travel faster than the speed of light. This effect is more visible with AC signals (AC voltages/currents). In the case of a dipole antenna, AC signals will push and pull electrons to and from both ends of the wire. Strong magnetic fields will happen in the center of the dipole. And these magnetic fields created by the AC currents will combine with the electric fields by the AC voltages to become an electromagnetic field!
It's important that the supply voltage is high frequency AC, if you have DC, yeah, the ends of the wire will exactly be the same as the supply voltage, we don't send DC to antenna. This topic is about radio frequency, there's a lot to learn!
Thankyou fella!
your welcome
you have to explain the leakage of E field lines
Sir because of AC supply the direction of magneting and Electric Field change with time ?
sir upload current distribution on thin wire antenna
Perfect 👍👍
Your positive comments motivates me, my goal is to create largest community of engineers in entire globe, so please help me for that by sharing this lecture series(playlist) with your friends in social media (watsapp, telegram etc). Thanks and welcome 🙏
Thanks!!
Your positive comments motivates me, my goal is to create largest community of engineers in entire globe, so please help me for that by sharing this lecture series(playlist) with your friends in social media (watsapp, telegram etc). Thanks and welcome 🙏
Thanks mister
Your positive comments motivates me, my goal is to create largest community of engineers in entire globe, so please help me for that by sharing this lecture series(playlist) with your friends in social media (watsapp, telegram etc). Thanks and welcome 🙏
Electric field direction is drawn wrong
Hi sir.You are taken ZL commen, where it goes in next step
How did u get magnetic field in open circuit as no current is flowing
This is not low frequency analysis as you study by ohms law or KVL or KCL. This understanding is based Maxwell's law
Is not the electric field creating magnetic field
Or magnetic field creating electric field
Yes it's true
Actually unlike DC current (like water flow in river), AC current is electron waves back and forth(like waves in ocean). so even in case1 (no flatting), there is still AC current, but actually not a single electron actually moves from upper wire to lower wire, the parasitic inductor/capacitor between two wires exchanges energy through mag/elec fields, and causes electron waves.
AC source causes waving (AC current), and this waving pattern is propagating through wires in approx speed of light, when it reaches open end (case 1), it reflected back and causes the so called "standing pattern" which means electrons waves magnitude will be very big at some places and very low (or no move) at some other places.
see standing waves visualized
czcams.com/video/M1PgCOTDjvI/video.html
but w/o flatting, these waves (AC current) cannot radiate because at any particular place their direction is opposite in two wires, flatting changes it as author said.
Bro u did open in both cases
What about this
An open circuit can be created with mismatch of the load impedance suppose your source has 50ohm input impedance but at the load side you connect 100ohm impedance in that case the current flow will be there but in a mismatch manner so you will have reflected waves
Hard to tell if this is a good video or not! It's way too dark, and the graphics are generally obscured by the hand of the speaker. Bad.
Sir, many mistakes in your video including incorrect concepts. Please correct
For example it's not current cancelation but magnetic fields which add up, and electric fields which must travel from top wire to bottom cause the radiation. voltage on standing wave is actually maximum at open circuit, you drew it incorrectly.
Direction of current only defines magnetic field And polarity of charge can only defines electric field.