OK! PICTURE! I guess these are called "Duck antennas:"
And, if they're rubber, they're called "Rubber duck antennas."Oh, and it is Beth's birthday, so be sure to wish her a happy birthday :-) I know, no embarrassing videos like last year.
Friday, April 3, 2009
Rubber Duck
I decided I wanted to control my robot from a greater distance, so I looked at easy fixes: new antennas! The antennas I were using were 1/4 wave antennas meaning that they are 1/4 the length of the radio wave they're transmitting. Well, it turns out that if you move up to a 1/2 wave antenna (1/2 the length of the radio wave), you get a 3dB gain, or a signal that is "twice as strong." Well, I went with a 1/2 wave antenna for my robot control signals and a full-wave antenna (5dB gain) for my video link... Hopefully it works :-)
OK! PICTURE! I guess these are called "Duck antennas:"
And, if they're rubber, they're called "Rubber duck antennas."
Oh, and it is Beth's birthday, so be sure to wish her a happy birthday :-) I know, no embarrassing videos like last year.
OK! PICTURE! I guess these are called "Duck antennas:"
And, if they're rubber, they're called "Rubber duck antennas."Oh, and it is Beth's birthday, so be sure to wish her a happy birthday :-) I know, no embarrassing videos like last year.
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6 comments:
Why would you link to that!? WHY!?
Thanks...now everybody won't forget. Yay.
Sweet antennas, btw(coughexcusepostformentioningmy birthdaycough)...
:-\
Um... Because I'm evil? Hey, what would you do if you had a perfectly good video and it was someone's birthday? Waste it? :-D
Ok, ok... I can remove the link if you want :-)
Lol...
Ok, that explains it, but I disagree with the "perfectly good" part. :-D
Oh, and I meant now everybody won't forget about my birthday -- no one ever forgot about the video, so the link doesn't matter... :-P
Man, you still hate me for making that video, don't you :-\
And as far as "perfectly good," I was just copying, "I mean, if you have a perfectly good snake, what else can you do with it but to put it in someone's bed? Otherwise, you waste it!"
SWEET! I wonder if you hooked it up to the "I beams" in a skyscraper, if you would have a giant microwave antenna. :D HEY!!! You could melt all the snow in Denver all at once!
LOL! I wish!
What actually happens is the signal gets more directional. So, a 3dB gain is actually a "focusing" of radio waves so it appears to be a signal twice as strong if you're looking at the side of the antenna, not the top or bottom.
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