Excellent your video Finally I could find someone who explains very well. Although I did not understand everything because I do not speak English. But the basics helped me. Thank you. Greetings from Argentina
hi frend, your chanel is fantastic, plenty cuban wuood appreciate all those videos because we depend of our ingenious things like that for developing aur connections... thanks
I understand enough that I see WHY you are using certain lengths for base/coil, etc, but HOW are you coming up with specific lengths, for instance, you have one of the coils from a 29mm length. Can you use a different length (and different coil) for 5 ghz? I've started to become addicted to your videos. Theyre very interesting!
I have been looking for inverted dipole antenna measurements to feed my parabola reflector... both 2.4/5/5.8... I hope to make some videos to share with you soon! I have been 3d print my own parabolic reflectors! I just need to test some simple antennas builds...
Is the coil to reduce the length o does it have another impact on the transmission of the signal? In researching antennae to try to fix a 5.8 gHz transmitter antennae that I chopped with a prop I came to believe that the exterior metal tube acted as a balun by essentially increasing the resistance on the ground to infinity. Now I guess I need to read more about the ground plane. Do you know anything about feed line issues with this frequency? What does the graph at the end show? Do you have a video about the hardware/software that you use to get the data in that graph?
Is it possible to make a 5.8GHz Antenna that just has a straight wire connected to a SMA Plug or do they always need that cylinder at the beginning and the spiral at the center? Length isn't probably THAT much of a problem but looks kind of is. I built and 3D printed a Periscope Replacement for a 1:16 Scale Tank to house a FPV Camera and VTx but the current Antenna sticks out like a sore thumb which is why I'm looking for something that goes well with the already present, no frills simple and straight, Antennas mounted just for show.
What's the purpose of the coil? Are you loading the antenna to make it shorter? At such high frequencies an antenna would be pretty small. So I don't see the point in shortening, unless your project needs such a short antenna.
Excelent informative video - Q- tthe piece of metal tubing used I think you called it the 'ground plane' has it got to be ferrus or brass/copper tubing does the antenna work better with a particular material...joe
Hello Mr. Mcneil I'm trying to find out how you've determined the length of your 1/4 wave antenna mesure. I'm using this formula for 1/2 wave length in meters : 150 x A ( A = Ratio between antenna length and thickness of the wire) / frequency in MHz) but I'm not coming very closer of your length. Thank you.
Andrew, great video. I'm trying to figure out what is the best possible linear polarized antenna I could make for the transmitting side. Would this dipole with coil be your choice?
I know this is a noob question, i am trying to learn as much as I can to get my ham license some day... On what occasion would you use a 1/4 or say even a full wave? I've heard of 5/8 wave as well... I suppose my question is, what are the purposes of the wave length sizes related to the antenna? Thanks
Thank you for your videos. Your graphs are very good. But I would be also interested in the math, so I'm able to calculate an build such an antenna for my frequencies. Is it also possible to build even larger dipole antennas? Is it possible to combine a 2.4 Ghz and a 5.x Ghz antenna? Sorry for my bad english :/
why is the opening of the sleeve in the bottom, towards the connector, instead of being upwards towards the monopole? Can this eliminate the common mode current on the outer shield?
Hi andrew im wondering if you could help me, i want to get the wifi signal from a hotspot 5 blocks away of my house, and i hope you could tell me which of your antennas is/are the best to me to get that signal if its possible. Thanks and big fan of your channel
If it is to remain "omni" you can only get about 2.4 dBi of gain. The omni pattern is like a perfectly round doughnut having 45 degree launch angles from the center. However if you make changes to get higher the launch angles will decrease and the doughnut shape becomes more of a platter, or saucer, shaped. Works great if the two devices connected are in the same plane. However, in the case of a UAV your gain would decrease as it rises in altitude. Not good, at all. If you want more "omni" gain performance switch to a quadrifiler Helix Omni. Those are about 9 dBi of gain. Adding 6 dB of gain will double your distance....mostly.
I'm watching these videos and becoming more and more suspicious... loading coil is to add inductance to compensate capacitance of the electrically short antenna - inductance depends on the size of the coil and core material - it can't be right if you just coil some predetermined length of wire on random diameter with randomly spacing turns - diameter, number of turns and coil length should be precise to achieve correct inductance...
hello, this antenna is not dipole! for a true dipole has no gain, and the two conductor elements have the same diameter! and the same length. what you show is an antenna has skirt and a self, which she has gain !!!
Excellent your video Finally I could find someone who explains very well. Although I did not understand everything because I do not speak English. But the basics helped me. Thank you. Greetings from Argentina
Glad it helped Esteban
hi andrew im a debut here just want to thank you for sharing your videos
Where have you been all my life!
hi frend, your chanel is fantastic, plenty cuban wuood appreciate all those videos because we depend of our ingenious things like that for developing aur connections... thanks
I understand enough that I see WHY you are using certain lengths for base/coil, etc, but HOW are you coming up with specific lengths, for instance, you have one of the coils from a 29mm length. Can you use a different length (and different coil) for 5 ghz?
I've started to become addicted to your videos. Theyre very interesting!
In the end you covered the antenna. You should have showed the bare antenna's measurements against the scale.
Very good! Finally someone who understands the subject :) That would be recommended for FPV ?
I have been looking for inverted dipole antenna measurements to feed my parabola reflector... both 2.4/5/5.8... I hope to make some videos to share with you soon!
I have been 3d print my own parabolic reflectors! I just need to test some simple antennas builds...
Is the coil to reduce the length o does it have another impact on the transmission of the signal?
In researching antennae to try to fix a 5.8 gHz transmitter antennae that I chopped with a prop I came to believe that the exterior metal tube acted as a balun by essentially increasing the resistance on the ground to infinity. Now I guess I need to read more about the ground plane. Do you know anything about feed line issues with this frequency?
What does the graph at the end show? Do you have a video about the hardware/software that you use to get the data in that graph?
Thank you for my solution,nice video
another well presented video panel mount coax fitting for my 10x helicoil and coax . is there a magic store where I can get supplies.
Is it possible to make a 5.8GHz Antenna that just has a straight wire connected to a SMA Plug or do they always need that cylinder at the beginning and the spiral at the center? Length isn't probably THAT much of a problem but looks kind of is.
I built and 3D printed a Periscope Replacement for a 1:16 Scale Tank to house a FPV Camera and VTx but the current Antenna sticks out like a sore thumb which is why I'm looking for something that goes well with the already present, no frills simple and straight, Antennas mounted just for show.
What's the purpose of the coil? Are you loading the antenna to make it shorter? At such high frequencies an antenna would be pretty small. So I don't see the point in shortening, unless your project needs such a short antenna.
Excelent informative video - Q- tthe piece of metal tubing used I think you called it the 'ground plane' has it got to be ferrus or brass/copper tubing does the antenna work better with a particular material...joe
Hello Mr. Mcneil
I'm trying to find out how you've determined the length of your 1/4 wave antenna mesure.
I'm using this formula for 1/2 wave length in meters : 150 x A ( A = Ratio between antenna length and thickness of the wire) / frequency in MHz) but I'm not coming very closer of your length.
Thank you.
Andrew, great video. I'm trying to figure out what is the best possible linear polarized antenna I could make for the transmitting side. Would this dipole with coil be your choice?
I know this is a noob question, i am trying to learn as much as I can to get my ham license some day... On what occasion would you use a 1/4 or say even a full wave? I've heard of 5/8 wave as well... I suppose my question is, what are the purposes of the wave length sizes related to the antenna? Thanks
Hi is this also applicable for WIFI high band? Where frequency spans 5.15ghz - 5.75ghz.
802.11a and 802.11ac use 5.3 to 5.8 GHz. Would you tune this to 5.5 GHz length to make it acceptable for the entire range of 5.3 to 5.8?
Thank you for your videos.
Your graphs are very good.
But I would be also interested in the math, so I'm able to calculate an build such an antenna for my frequencies.
Is it also possible to build even larger dipole antennas?
Is it possible to combine a 2.4 Ghz and a 5.x Ghz antenna?
Sorry for my bad english :/
why is the opening of the sleeve in the bottom, towards the connector, instead of being upwards towards the monopole? Can this eliminate the common mode current on the outer shield?
come to think of it, i guess it works both ways. it has the same effect
Great interesting video ! Thnxs !
Hi andrew im wondering if you could help me, i want to get the wifi signal from a hotspot 5 blocks away of my house, and i hope you could tell me which of your antennas is/are the best to me to get that signal if its possible. Thanks and big fan of your channel
The best antenna for distance with low data loss is the double biquad. I would put it up against a yagi any day of the week.
Andrew
Andrew, do you have a calculator you use to determine the lengths? Your insight has been really helpful.
frequency divided by 300 (speed of light) = band length, which determines the antenna length. Full wave, half wave, etc.
I was under the impression that an Inverted V and a Dipole antenna where the same! now I'm really confused!
+Migueldeservantes Join the club . . .
Radiation pattern is different: Dipole = Donut shape, Inverted V = V-shaped donut.
This may be off topic but can i use a 5.8ghz antenna on a 5ghz wifi?
How would you make one for a higher gain like 6dbi or even 10dbi
If it is to remain "omni" you can only get about 2.4 dBi of gain. The omni pattern is like a perfectly round doughnut having 45 degree launch angles from the center. However if you make changes to get higher the launch angles will decrease and the doughnut shape becomes more of a platter, or saucer, shaped. Works great if the two devices connected are in the same plane. However, in the case of a UAV your gain would decrease as it rises in altitude. Not good, at all. If you want more "omni" gain performance switch to a quadrifiler Helix Omni. Those are about 9 dBi of gain. Adding 6 dB of gain will double your distance....mostly.
@@bilyB1SuperScience Knowledgeable man))
Your blueprint shows measurements in millimeters but you're measuring in centimeters? I'm confused , does the antenna still measure to 5.8ghz?
yes, as long as it is scaled accordingly.
how much gain does this antenna approximately have?
+shinew 5db
thanks! made one and it works quite well! thank you for all the video tutorials!
size matters, but here, bigger is worse
I'm watching these videos and becoming more and more suspicious... loading coil is to add inductance to compensate capacitance of the electrically short antenna - inductance depends on the size of the coil and core material - it can't be right if you just coil some predetermined length of wire on random diameter with randomly spacing turns - diameter, number of turns and coil length should be precise to achieve correct inductance...
hello, this antenna is not dipole! for a true dipole has no gain, and the two conductor elements have the same diameter! and the same length.
what you show is an antenna has skirt and a self, which she has gain !!!
Yes - It looks like 5/8 lambda unipol with coil and NOT like a DIPOLE
Great, but this is NOT a dipole!! Go read up a bit on dipoles........
This is not a Dipole Antenna, you should research subjects before posting videos that mislead people.
It's a dipole, short Hertzian dipole maybe you should research let me guess your a ham radio operator