LoRa/LoRaWAN tutorial 5: Decibel, dBm, dBi, dBd

[@josephbais1767]

One of the "very best ever" found in KZbin with great presentation.

[@nishant4001]

Crisp, Clear, Simple etc etc etc etc one of the best video youtube will ever have

[@kalpeshbhalerao9403]

I have been working out for last 3 days to learn LoRaWAN....and finally got this channel.....Probably the best one.

[@kandredfpv]

Best dB explanation I've ever seen 👍 Thanks for taking the time to make this!

[@smsohelozzaman3026]

I have to admit with others that you are one of the best RF teachers I have ever seen! I studied and worked in Bangladesh, Germany and USA just to let you know that I have seen a lot of RF teacher and engineers in my life!

[@Mobilefish]

Thanks for the compliment, but please be advised I am not a RF engineer or electronics engineer. I am interested in this technology and spend a lot of time to grasp it. To share my knowledge with others, I have therefore created this tutorial series.

[@jackbryan5851]

Nice to hear that finally explained! Can't tell you how long I have been wondering about that.

[@Kadaa988]

thank you so much for this video. never been crystal clear before. this is the best video on this topic so far. i humbly request you to make more videos on several more topic like in this way.

[@tonycadena47]

The explained examples help to make this an intuitive learning versus a learning by rote. Thank you.

[@ModestMaker]

Well done sir- you have a gift for explaining things clearly.

[@Soho9111]

why they did not teach us like this in Engineering school ?!!! I graduated at 2007 and this is the first time i totally understand dB, dBm thank you

[@Visual0gamer]

i was looking for this, thank you very much!

[@shawntaylor9509]

Thank you for taking the time to make this.

[@deltalima]

Thanks a lot for this *excelent* video! I never found it better explained. :-)

[@fedahussainmuzaffari1910]

a very great explanation! thank you bro!

[@KanhuPadhy]

Excellent teaching on fundamental topics .

[@khadlelmromiz]

Good explanation and easy to understand, thanks a lot😊

[@Ayansh45]

Tremendous video... Thanks my concept has been cleared..

[@MrVineethprasad]

hats off to the makers of this video. cannot b simpler than this

[@Mobilefish]

Thanks.

[@sureshkumarmadevan3011]

Excellent video. Crystal clear explanation.

[@fahadborashed9994]

Thank you Sir, easy and simple way to deliver the information

[@hbibamrani9890]

Excellent illustration.

[@marcoroma93]

Minute 0:25, there is an error in the second example (Cable), The input power and the output power is in [mW], hence A(loss) will be in [dBm] not in dB

[@peubouzon]

Thank's, i really enjoyed your explanation!

[@henrylaredo]

is the first time that I understand this matter, thank you!!!

[@Vicky12111]

Thank you sir for giving excellent knowledge in better ideas

[@Thanhlh84]

Thanks for the great video explaining about dB, dBi, dBd. I do not really understand this for long time.

[@obione9317]

Thank you, it all start to make sense now.

[@shahidhameed5980]

very interesting & informative ...thank you sir

[@albertschrocker9995]

Thnks for your effort! Very good and understandable explanation!

[@lyambdahelowel1900]

Easily and perfect explanation!

[@pcbworks]

Awesome!

[@djordjekovcin6287]

there is another rule that can also be applied. 2*3*5 [mW] vs 3+5+7 [dBm] for example 17dBm =50mW { 5*5*2=50 ----- 7+7+3=17)

[@ibrahimahmethan586]

VERY useful information . god bless you man

[@macnet83]

Very well explained. thank you

[@r1rmndz507]

awesome lecture!

[@baljindersingh-fv1ez]

Very nice sir..

[@silverian]

Thanks for very good explanation!

[@tems9999]

Crystal clear... thanks a lot for your share

[@arnehovind3596]

Incredible video. For years I have been trying to wrap my head around understanding db. This video makes a great explanation. Now it is almost clear as mud. Do you have a link to more of these 10 & 3 multiplication examples?

[@vvnsastrysastry4472]

What is dbic in circular polarised antenna.or.how one specify a circular polarised antenna measered with std. Lineor dipole.

[@ThePing98]

great video serie

[@vijaykumaranalagarsamy8515]

@14.32 can you please explain how the equation dBi = dBd + 2.15 comes? Is that correct?

[@omarcruz6326]

Great Stuff !!! Bravo

[@weizheng1470]

I am a little confused by one point. As the radiated patterns of the isotropic antenna and dipole antenna, dipole antenna's gain is 2.15dB bigger than the isotropic antenna in the horizontal direction. Why does dBi equal dBd plus 2.15, not dBd equals dBi plus 2.15?

[@Jamesklein26]

isotropic antenna has equal gain in all directions where a dipole has a null off the ends and (more gain/energy) off the broadside. take a balloon and point your fingers together your fingers form the null and balloon expands (gain) out

[@rameshpetwal8451]

Very nice.

[@ismailhaque8262]

What does mean of 0 dBi with respect to radiation pattern of an antenna?

[@anujregmi4582]

a gem

[@LIM_Khuan]

good...thanks

[@schlumbie]

Does body loss in dB can be converted to dBi? While dBi is actually reference to isotropic antenna. Thanks in advance

[@mdzulhaidar6938]

Sorry, sir, is there a journal, if so, can I send it by email? pleas respon me

[@youngkevinsmith]

dBi = dBd + 2.15. Should this not be dBd= dBi + 2.15 based on blue and red diagram/ pattern shown? @14.27

[@starsouf2950]

Thanks

[@anthoeseo546]

incroyable thank

[@paramforaccounts]

Gold.

[@leo-rq2ei]

Thank you I thought it was way more complicated than it really is

[@Calm_Energy]

me to! Thank goodness for youtube.

[@abdessamadbellouch5655]

what means By ALOHA

[@Mobilefish]

See: www.wirelesscommunication.nl/reference/chaptr06/aloha/aloha.htm

[@aloneprince2376]

bright side !

[@ahemednor5201]

🙏🙏🌹🌹

[@youngkevinsmith]

DB is a ratio. Not aabsolute DBM is absolute value.... mW

[@youngkevinsmith]

Isotropic v dipole

[@aliansari9191]

Sir, very useful information.. I request you to make a video like how to read the datasheet of the Antenna. Here is the Example: www.johansontechnology.com/datasheets/0868AT43A0020/0868AT43A0020.pdf In the datasheet Antenna Gain:-1.0 dBi represent minus values so it represents loss?

[@Mobilefish]

Asmat, thanks for the input. I am working on several videos about antennas and I am explaining most often used antenna parameters used in datasheet. I have missed negative antenna gain, oops.But I will explain this in my tutorials. THANKS!

[@aliansari9191]

@@Mobilefish I appreciate your quick response on this.. looking forward to see your video on this..