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Rad Science: DIY Cellphone Antenna

Friday, May 16th, 2008 – running time 02:50
Dr. Kiki solves the age old cellphone reception question.

The Rad Scientist has moved into a cell reception twilight zone. Lucky for her, she's well versed in antenna making!

Highlights
popSiren ( 0:06, 2:40, 0:06, 2:40 ) frequency ( 1:06, 1:07, 1:15, 1:06, 1:07, 1:15 ) external antenna ( 0:42, 2:02, 2:06, 0:42, 2:02, 2:06 ) Twilight Zone ( 0:21, 0:21 ) popSiren ( 0:06, 2:40, 0:06, 2:40 ) frequency ( 1:06, 1:07, 1:15, 1:06, 1:07, 1:15 ) external antenna ( 0:42, 2:02, 2:06, 0:42, 2:02, 2:06 ) Twilight Zone ( 0:21, 0:21 )

Automatically Generated Transcript(may not be 100% accurate) ( more )

" Now -- daily does of popSiren. I recently moved into a new -- in the process decided that I put any ethnic health undermining found this great idea in principle -- we all want one bill Hewlett. But I'm not so much turns out that my house isn't final kind of -- cell phone reception Twilight Zone. Some countries that is really great and sometimes it Jeff fox. Instead of giving in and paying for another phone I decided that I would find a way to improve my signal. There's the giant. After that searching on the Internet and a bit of thinking about the -- at cell phones smart. Democrat a pretty easy -- to my reception was a very basic external antenna. It turns out that most cell phone's transmit or receive electromagnetic radiation in the form of -- Within four possible frequently -- and 808681900. Megahertz. I removing the battery and I found just take it out look at the word vomit back. I found out that my phone is dual band and uses the 850 and 1900. Megahertz frequency and the frequency -- EM -- it indirectly related to its wavelengths and good antenna resonate back. Asked with a particular frequency when that link it equaled Q one quarter of a -- you want it then match up with the by the way. Knowing that information and the fact that EM -- always travel at the speed of light. Are -- able to calculate the wave length of the -- wave my phone receives. By using this equation right here wave length equals the velocity divided back frequencies -- speed of light 1900 megahertz bloody block. Because my opponent dual band I want something that's close to a common manager of both -- it turns out I need an antenna a round of sixteen to seventeen meters long. Centimeters long felt like hats a liar and that is you know measured out to the proper link David its net. And -- the -- at about a centimeter at the very end this and gonna go into the external antenna port that on most cell phones these days. You can see the external antenna port isn't usually a little plug that's the right -- on the backside. So on the other end I wound it around this grew about five times and -- increases the ability of the -- to receive transmissions. Then carried food and it covers the antenna port and just plug the end of it. In the antenna port. And it worked great to approve receptionists. I'd love to hear you've done anything similar to and at the differently the wire. Britney is even have different designs. So I emailed me hot fire and it revision3.com. Check out entire popSiren that it revision3.com. Slash science. -- next."

" Now -- daily does of popSiren. I recently moved into a new -- in the process decided that I put any ethnic health undermining found this great idea in principle -- we all want one bill Hewlett. But I'm not so much turns out that my house isn't final kind of -- cell phone reception Twilight Zone. Some countries that is really great and sometimes it Jeff fox. Instead of giving in and paying for another phone I decided that I would find a way to improve my signal. There's the giant. After that searching on the Internet and a bit of thinking about the -- at cell phones smart. Democrat a pretty easy -- to my reception was a very basic external antenna. It turns out that most cell phone's transmit or receive electromagnetic radiation in the form of -- Within four possible frequently -- and 808681900. Megahertz. I removing the battery and I found just take it out look at the word vomit back. I found out that my phone is dual band and uses the 850 and 1900. Megahertz frequency and the frequency -- EM -- it indirectly related to its wavelengths and good antenna resonate back. Asked with a particular frequency when that link it equaled Q one quarter of a -- you want it then match up with the by the way. Knowing that information and the fact that EM -- always travel at the speed of light. Are -- able to calculate the wave length of the -- wave my phone receives. By using this equation right here wave length equals the velocity divided back frequencies -- speed of light 1900 megahertz bloody block. Because my opponent dual band I want something that's close to a common manager of both -- it turns out I need an antenna a round of sixteen to seventeen meters long. Centimeters long felt like hats a liar and that is you know measured out to the proper link David its net. And -- the -- at about a centimeter at the very end this and gonna go into the external antenna port that on most cell phones these days. You can see the external antenna port isn't usually a little plug that's the right -- on the backside. So on the other end I wound it around this grew about five times and -- increases the ability of the -- to receive transmissions. Then carried food and it covers the antenna port and just plug the end of it. In the antenna port. And it worked great to approve receptionists. I'd love to hear you've done anything similar to and at the differently the wire. Britney is even have different designs. So I emailed me hot fire and it revision3.com. Check out entire popSiren that it revision3.com. Slash science. -- next."