Do u mind if I ask? I have a few questions. 1. when the antenna radiated, does it means they go as far as the red region in their diagram or they go farther than that? 2. why the red region in the diagram has more power than other region when they are farther than the other? should farther more decrease power?
Hey Nutthawut, not at all. 1. The radiation pattern represents relative strength of radiation compared to a dipole (mostly). So yes, it does, check out this video for details - ua-cam.com/video/cKxCfZ36HmM/v-deo.html 2. Radiation pattern does not represent physical strength of radiation relative to an antenna, but to a dipole, it is an abstraction that helps us visualize antenna radiation strength in any direction. If you check that video from previous answer, it might be more clear..
@@Rfelements So that means the practical antennas compare to "Dipole" which I understand is the ideal dipole and in my thought, the ideal dipole radiates the same intensity every region but in the practical antennas it not and we compare it to the ideal. Am I right?
@@ramza1526 When antenna radiation patterns are measured, dipole is one of antennas used. The gain of antennas obtained from simulation is in dBi - compared to isotropic radiator, which is not the same as dipole.
@@Rfelements I'm studying antenna because I interest to build the phased-array antenna but I barely understand its fundamentals. I know that they have to consider radiation pattern, polarization, link budget, and more but when it going into detail I start to confuse. Example: When it starts what to consider first and what next? how far the antenna can propagate? or how distant the antenna can propagate relate to radiation pattern?
@@ramza1526 Antenna is a part of the whole system radio + Tx antenna + path loss + Rx antenna + RX radio.. How far an antenna can work is a function of all these. If you want to design a phased array, these videos will not help. It's beyond what this series is meant for. You might want to study a handbook instead, for example this one: bit.ly/3xXyGab
Because there is no real-world EM wave radiator that has isotropic radiation pattern. With mechanical waves such as sound, it is possible to have isotropic radiator..
Hi There, I am wondering if anyone has been able to provide a 3d Pattern testing facility for the public to use... I would like to know where there is one so we can send samples to have them test our equipment. If there is not, it would be cool to have a youtube channel showing how to test antennas and have a faceoff vs Brand and unbranded antennas.
The best bet is probably approaching a local university that might have one. They might be the most open to have your antennas measured if you need to. Probably not for free, but still.
through side lobes antennas radiate signal to unwanted directions. The result of that is that other radios see this unwanted signal and to them it is noise, i.e. signal they cannot work with nor understand.
Hi Harth, we are working on establishing distributors across Middle east as well, but it's a long distance run, so you and us as well will need patience.. In the mean time you could try to get our products from here: netcomsmart.com/product-tag/rfelements/
thank you very much, in 4 minutes, you have enlightented me more than my teacher
your videos are gold my friend... clearest antenna explanations in youtube
Glad you like them!
Your explanations are quite useful to understand. Outstanding work, thank you very much!
This is an awesome channel. Thanks for the refresh after all these years!
Glad you enjoy it!
What kind of antenna to be use in a gold locator
Videos in playlist arent well arranged, its very difficult to learn step by step.
Most helpful videos
Antenas of 2d es cuando las espirales 2 de be y cb se conjuntan para modular una suerte de impulsos que surjen de Exp z + 1
Do u mind if I ask? I have a few questions.
1. when the antenna radiated, does it means they go as far as the red region in their diagram or they go farther than that?
2. why the red region in the diagram has more power than other region when they are farther than the other? should farther more decrease power?
Hey Nutthawut, not at all.
1. The radiation pattern represents relative strength of radiation compared to a dipole (mostly). So yes, it does, check out this video for details - ua-cam.com/video/cKxCfZ36HmM/v-deo.html
2. Radiation pattern does not represent physical strength of radiation relative to an antenna, but to a dipole, it is an abstraction that helps us visualize antenna radiation strength in any direction. If you check that video from previous answer, it might be more clear..
@@Rfelements So that means the practical antennas compare to "Dipole" which I understand is the ideal dipole and in my thought, the ideal dipole radiates the same intensity every region but in the practical antennas it not and we compare it to the ideal. Am I right?
@@ramza1526 When antenna radiation patterns are measured, dipole is one of antennas used. The gain of antennas obtained from simulation is in dBi - compared to isotropic radiator, which is not the same as dipole.
@@Rfelements I'm studying antenna because I interest to build the phased-array antenna but I barely understand its fundamentals. I know that they have to consider radiation pattern, polarization, link budget, and more but when it going into detail I start to confuse. Example: When it starts what to consider first and what next? how far the antenna can propagate? or how distant the antenna can propagate relate to radiation pattern?
@@ramza1526 Antenna is a part of the whole system radio + Tx antenna + path loss + Rx antenna + RX radio.. How far an antenna can work is a function of all these. If you want to design a phased array, these videos will not help. It's beyond what this series is meant for. You might want to study a handbook instead, for example this one: bit.ly/3xXyGab
thanks for your videos, please make video(s) showing how QAM and OFDMA work together, especially in in 802.11ax (wi-fi 6)
Thank you for the tip, noted!
Thank you for your pleasant explanation which helped us visualize the idea easily
You're welcome, what visualization do you mean? And for what purpose? If you don't mind sharing..
@@Rfelements i understood like the animation you used. The animation helped us imagine the abstract realm by mapping it into the real world.
Awesome channel!! I have a question, why isotropic radiation doesn't exist?
Because there is no real-world EM wave radiator that has isotropic radiation pattern. With mechanical waves such as sound, it is possible to have isotropic radiator..
thank you so much! The best explanation
Hi There, I am wondering if anyone has been able to provide a 3d Pattern testing facility for the public to use... I would like to know where there is one so we can send samples to have them test our equipment. If there is not, it would be cool to have a youtube channel showing how to test antennas and have a faceoff vs Brand and unbranded antennas.
The best bet is probably approaching a local university that might have one. They might be the most open to have your antennas measured if you need to. Probably not for free, but still.
Thanks for the suggestion... Will try that path.
What is the interpretation of these terms in case of 2D radiation pattern
1)E_theta,phi=0
2)E_phi,phi=0
3)E_theta,phi=90
4)E_phi,phi=90
give the expression filed electrique for reflector plane and dipole
Very good channel! Thank you for sharing.
I have a question. Why are the side lopes of the antenna is cause the biggest problem of interference?
through side lobes antennas radiate signal to unwanted directions. The result of that is that other radios see this unwanted signal and to them it is noise, i.e. signal they cannot work with nor understand.
very nice ,, plz give radiation pattern of hexbeam, yagi , delta loop antena
what do you mean?
i wish to use RF elements product put it not available her in Palestine and Israel
Hi Harth, we are working on establishing distributors across Middle east as well, but it's a long distance run, so you and us as well will need patience.. In the mean time you could try to get our products from here: netcomsmart.com/product-tag/rfelements/
Very helpful please accept my like