0ne wave length plus 5% as the antenna book says BTW for the reflector... Just a Correction to your video so people won't be doing it wrong!. Also a Reflector does not have to be grounded to be a reflector. Please refer to the ARRL Antenna Book. Also you pointed it in a different direction with yours it seems, being directional that matters. Just saying... Jimmy, ARRL TS, WX9DX
It's deliberate sabotage by the chinese. They know the proper wave length and it's no cheaper or harder to make those byquads in correct wavelength then it is to make it in the wrong wave length that you got it in. So we sent all our manufacturing to the chinese... they sell us deliberate screwed up junk.. and we are left with no other alternative, there is no other manufacturing facilities in the rest of the world to compete against them. Real geniuses our politicians...NOT
Good video Andrew. I am living in Ireland . How can i make antennae to receive mobile broadband signal in area where the signal is weak . Can you propose a solution ?
Hi Andrew, Your coaxial cable has a sharp bend and this provides high impedance for the 4G signal (according transmission line theory). The sharp bend has been straightened but once it is bent, it can't be undone. Use another cable
I was going to comment on exactly this coax fault. Someone crushed the dielectric at the kink and it will cause a low impedance mismatch from nominal 50 ohms. This will cause high VSWR and reflections preventing the full receive signal from the antenna to reach the receiver. And that RG-213 coax is very good for this 2.4 GHz application.
Sir im watching ur vids since long time...i build one biquad antenna for 1900 frequency...the sides are about 4 cm each...but it doeanot work i think...i m tired now...i need an antenna for my usb dongle... can u make one for 1900 freq...while bending the wire..1 or 2 mili metter difference does effect performance??...
I took one of these (8$ eBay), opened it up, the dual quad antenna was actually w/in specs, I removed the lead in wire, took a netgear N300 2.4Ghz USB adapter, split it apart, wired antenna to it (this N300 has antenna ports inside), hotglued it inside case w/ antenna, mounted it on a pole, connected a 25ft USB cable to inside house, I'm seeing bizness SSID's that are almost 1/2 mile away ;)
not really bridge...center of the coaxial to one side, and the ground to the other side !! you cannot mesure this directly, because we are in RF, not in continuous... hf or rf are different to direct connection !!..open the box has maybe change the frequency, because we match the antenna with the distance between the reflector and the antenna !!
signal strength and signal quality are two different things, you can have low signal but great quality and vise versa, the second thing is if it's cheap and from the China don't get your hopes up, it's cheap for a reason
Hello Andrew, You're obviously like the best person to talk to about antennas on TH-cam. I have have a few questions because you become very inspiring and really have sparked my interest in a few projects. What I want to know is the following. When it comes to buying copper tape single sided or double which should I but and do they both accept being soldered? Could I make ( with copper tape on card board ) a portable cheap antenna? Out of all your antennas that you have built ( I pretty much seen all your videos ) which antenna performs the best and why? Thank You in advance Sir.
andrew mcneil Hi Andrew, You know what I did just out of stupid curiosity? Like I said I was inspired by your work and knowledge. I built a panel antenna really NOT expecting it to work. It's 11& 1/2 inches by 17 & 1/2". ( reflector ) the main panel slightly smaller. Here's the kicker I had a really hard time trying to find copper tape BUT I have a NICE BIG FAT ROLL of Aluminum tape and was thinking would it work? I couldn't solder the aluminum because that takes a special type of solder so I taped wires to the aluminum surface with aluminum tape and made sure there was a current running through the whole surface. The aluminum tape by the way I did stick to card board matter of fact a Fed Ex box. The thing actually works better then the two antennas that came with the wifi unit. I was FLOORED! I didn't expect it to work at all. Between the two panels are straws that are 4mm in diameter that I hot glued to the panels. So far I've built four antennas because of you. Now that I know I can be successful at it I'm going to try and build something super powerful. I Thank You for your great work. My internet is quick once again. It hasn't been quick for almost a year! Thanks Andrew!
Where can I get a good resource that shows 'antenna calculations' behind these things? Some make the length 32mm and others 38mm so and so... but they dont tell why. Sorry btw... electronics are... out of my field.
hey Andrew, when you have the time, could you please check out the Alfa AWUS036NEH wifi card, it's rated at 1w but i'm wondering how it compare with the original 1watt alfa card. thanks.
Sir im trying to contact u since last few months.. I tried to make biquad nd yahi desk antenna for my device...but no one works a lil better than the built in antenna...i guess i m not gud in cutting according to measurements.. Kindly sir can u make an anteena for 1900 freq...i bought 4 antenna here..but no 1 is correct according to freq...thy are cheating
magari se si evita di posizionare l'antenna ricevente in linea con il montante metallico sul muro composto da slot in polarizzazione verticale è meglio...
Chinese copy everything but when they don't know what there doing is is so easy to get it wrong its so bad to sell crap good job you know how to fix it.
I see that other video where they make positive and negative antenna make contact ..the question is can I make a panel type so that positive and negative but not touching the mariposita ????
i do like interlectual stuff like this but for some of us who do not fully understand some of the concepts involving radio. freakentcys not so easy will you have any thing like a step by step as to how to build and test as well as what it should be made of looking forward to it thanks
does it work well? as I got a tv dish an a wifi extender, so far I put the wifi extender on the roof open so it can reach the best signal, but it only reaches 2-bar signal.
thanks Andrew, btw I have build several Double Bi-quads they work better than the usual "arial" antenna that came with my 54mbs dongle... I hooked the dongle up to a dbl bquad and its a Rockstar! all using YOUR instructional video to the letter. Altho I have used Aluminium Plate as the base reflector the next few I make (and sell) will be made of wood as I feel I am loosing too much current to the plate and not the actual antenna itself* Oh last thingy, how much do you recon I should sell the db bquad for? Im thinking R750.00 - is this too little? what do you usually sell yours for? thanks Wifi-guru Man! kind regards, Jon. Zen Designs. aka JAYFi wifi antennas.
I believe that is the wavelength of the radio signal is equal to the length of the sides of the reflector. For example a wavelength of 10cm will have a 10cm x 10cm reflector.
0ne wave length plus 5% as the antenna book says BTW for the reflector... Just a Correction to your video so people won't be doing it wrong!. Also a Reflector does not have to be grounded to be a reflector. Please refer to the ARRL Antenna Book. Also you pointed it in a different direction with yours it seems, being directional that matters. Just saying...
Jimmy, ARRL TS, WX9DX
Next time you open one of these you'll find nothing inside it except for a Screw soldered to a one end of the Coax Cable xD
Duraltia i found dead flies
maybe you seen wrongly on the eBay, it shouldn't be "Wifi Antenna" but " Wifi Antenna Case"
Edward Ng i
Pretty bad you have to rebuild some thing you perches to make it work ...God job on the rebuild ......
Scott Dowers Thanks Scott
It's deliberate sabotage by the chinese. They know the proper wave length and it's no cheaper or harder to make those byquads in correct wavelength then it is to make it in the wrong wave length that you got it in. So we sent all our manufacturing to the chinese... they sell us deliberate screwed up junk.. and we are left with no other alternative, there is no other manufacturing facilities in the rest of the world to compete against them. Real geniuses our politicians...NOT
Good video Andrew. I am living in Ireland . How can i make antennae to receive mobile broadband signal in area where the signal is weak . Can you propose a solution ?
Hi Andrew, Your coaxial cable has a sharp bend and this provides high impedance for the 4G signal (according transmission line theory). The sharp bend has been straightened but once it is bent, it can't be undone. Use another cable
I was going to comment on exactly this coax fault. Someone crushed the dielectric at the kink and it will cause a low impedance mismatch from nominal 50 ohms. This will cause high VSWR and reflections preventing the full receive signal from the antenna to reach the receiver. And that RG-213 coax is very good for this 2.4 GHz application.
Sir im watching ur vids since long time...i build one biquad antenna for 1900 frequency...the sides are about 4 cm each...but it doeanot work i think...i m tired now...i need an antenna for my usb dongle... can u make one for 1900 freq...while bending the wire..1 or 2 mili metter difference does effect performance??...
many videos of this type try to connect an antenna to a usb port but that is wrong. It must be connected to a wifi router.
I took one of these (8$ eBay), opened it up, the dual quad antenna was actually w/in specs, I removed the lead in wire, took a netgear N300 2.4Ghz USB adapter, split it apart, wired antenna to it (this N300 has antenna ports inside), hotglued it inside case w/ antenna, mounted it on a pole, connected a 25ft USB cable to inside house, I'm seeing bizness SSID's that are almost 1/2 mile away ;)
what kind of material reflects the signal best? Why do direct tv dishes use a dull , gray surface on their dishes?
Pls the name of software for test antenna signal..
www.vistumbler.net/
What software do you run on the Alfa card please for analysing ? Very interesting videos BTW thanks for taking time to do them.
it is a directional antenna... What happens if you point it directly at your AP?
not really bridge...center of the coaxial to one side, and the ground to the other side !! you cannot mesure this directly, because we are in RF, not in continuous... hf or rf are different to direct connection !!..open the box has maybe change the frequency, because we match the antenna with the distance between the reflector and the antenna !!
signal strength and signal quality are two different things, you can have low signal but great quality and vise versa, the second thing is if it's cheap and from the China don't get your hopes up, it's cheap for a reason
True.
Hello Andrew,
You're obviously like the best person to talk to about antennas on TH-cam.
I have have a few questions because you become very inspiring and really have sparked my interest in a few projects. What I want to know is the following.
When it comes to buying copper tape single sided or double which should I but and do they both accept being soldered?
Could I make ( with copper tape on card board ) a portable cheap antenna?
Out of all your antennas that you have built ( I pretty much seen all your videos ) which antenna performs the best and why?
Thank You in advance Sir.
It is hard to say which antenna is best as they all have their strengths and weaknesses but the best all rounder in my opinion is the biquad.
andrew mcneil Hi Andrew,
You know what I did just out of stupid curiosity?
Like I said I was inspired by your work and knowledge.
I built a panel antenna really NOT expecting it to work. It's 11& 1/2 inches by 17 & 1/2". ( reflector ) the main panel slightly smaller.
Here's the kicker I had a really hard time trying to find copper tape BUT I have a NICE BIG FAT ROLL of Aluminum tape and was thinking would it work?
I couldn't solder the aluminum because that takes a special type of solder so I taped wires to the aluminum surface with aluminum tape and made sure there was a current running through the whole surface.
The aluminum tape by the way I did stick to card board matter of fact a Fed Ex box.
The thing actually works better then the two antennas that came with the wifi unit.
I was FLOORED! I didn't expect it to work at all.
Between the two panels are straws that are 4mm in diameter that I hot glued to the panels.
So far I've built four antennas because of you. Now that I know I can be successful at it I'm going to try and build something super powerful.
I Thank You for your great work. My internet is quick once again.
It hasn't been quick for almost a year!
Thanks Andrew!
Where can I get a good resource that shows 'antenna calculations' behind these things? Some make the length 32mm and others 38mm so and so... but they dont tell why. Sorry btw... electronics are... out of my field.
hey Andrew, when you have the time, could you please check out the Alfa AWUS036NEH wifi card, it's rated at 1w but i'm wondering how it compare with the original 1watt alfa card. thanks.
Sir im trying to contact u since last few months..
I tried to make biquad nd yahi desk antenna for my device...but no one works a lil better than the built in antenna...i guess i m not gud in cutting according to measurements..
Kindly sir can u make an anteena for 1900 freq...i bought 4 antenna here..but no 1 is correct according to freq...thy are cheating
Ammor Kouky the software he is using to check the signal is called Vistumbler.
magari se si evita di posizionare l'antenna ricevente in linea con il montante metallico sul muro composto da slot in polarizzazione verticale è meglio...
the mean lengh of each squares should be 31.25 mm. Is almost correct.
1:10 You are using your body as an antenna
Chinese copy everything but when they don't know what there doing is is so easy to get it wrong its so bad to sell crap good job you know how to fix it.
And the guy who constructed it probably makes a dollar a day...
I see that other video where they make positive and negative antenna make contact ..the question is can I make a panel type so that positive and negative but not touching the mariposita ????
andrew mcneil of course I can't tell you what you already know; you should have replaced that long cable with a two inches long RF cable.
what is the program you use to check the signal?
AMMAR KOUKY vistumbler
Китайцы как всегда творят чудеса, а рефлектор можно было оставить родной, только биквадрат заменить на медь.
i do like interlectual stuff like this
but for some of us who do not fully understand some of the concepts involving radio. freakentcys not so easy will you have any thing like a step by step as to how to build
and test as well as what it should be made of
looking forward to it thanks
many videos of this type try to connect an antenna to a usb port but that is wrong. It must be connected to a wifi router.
What is the software used to test the spectrum?
how many degrees does a bi quad have, porpagation wise
A properly designed and constructed Biquad antenna delivers 10 to 11 dBi Gain with a 50-55 degrees beam width.
perhaps if you pointed it in the correct direction...."mate"
1:56 "It doesn't look too bad, it just doesn't work"
Love it 😄
Lol
DBI ??????????????????????????
grounding the shield reflector would drain the signal to ground
bloke doesn't know a screw from a nail
please can u give me a link for the wifi analyzer please
Very good!!
👍
👏👏👏👏👏👏
buy a wifi extender. Build a reflector like a direct tv dish and put the extender in front of the reflector.
does it work well? as I got a tv dish an a wifi extender, so far I put the wifi extender on the roof open so it can reach the best signal, but it only reaches 2-bar signal.
Sometimes I wonder, how the hell China got the second largest economy...
+ika ika well, like that. The author has bought it! XD
Can you share the link where you buy it?
乐光
what is an alpha card?
Great , would you add all the measures please.
how much are they?
Quack quack. Im a duck
you are the best
Good work thanks.
damn...awesome video :)
Nice improvement
great work
Good job on that!
you are a beast!
is the double bi-quad better than the bi-quad?
+Jon Groves Yes 3db better
thanks Andrew,
btw I have build several Double Bi-quads they work better than the usual "arial" antenna that came with my 54mbs dongle... I hooked the dongle up to a dbl bquad and its a Rockstar! all using YOUR instructional video to the letter. Altho I have used Aluminium Plate as the base reflector the next few I make (and sell) will be made of wood as I feel I am loosing too much current to the plate and not the actual antenna itself* Oh last thingy, how much do you recon I should sell the db bquad for? Im thinking R750.00 - is this too little? what do you usually sell yours for?
thanks Wifi-guru Man!
kind regards,
Jon.
Zen Designs.
aka JAYFi wifi antennas.
القران الكريم نور لك في الظلومات
Maybe you expect a top quality product for free next time
What's 1 wavelength square?
I believe that is the wavelength of the radio signal is equal to the length of the sides of the reflector. For example a wavelength of 10cm will have a 10cm x 10cm reflector.