Ping Larry

Jun 23, 2010 2 Replies

I've now built several different antennas for the wi-fi. The dish works very well and about the same, as far as signal strength goes, but better in noise rejection is a "Cantenna" I think that they called it. Basically just a tube, calculated as a wave guide, with a radiator



1/4 wavelength from the closed end.

I'm not sure whether this is what you were recommending as there is also a "Pringles Can" that uses reflectors and directors inside the tube.



However, the recommended length of the "Cantenna" seems to be one wave length. Which is about 8 inches. Because of what I welded together to make the tube mine ended up 12 inches long, about 1.5 wave length. Dom you think cutting the tube to 1 wave length improve signal strength?



Secondly, I am now getting greedy. Since the Cantenna and the dish each worked very well, thank you, I'm now thinking of combining the two. If I do that I am assuming that the mouth of the tube should be at the focus point of the dish? right?



Cheers,



Bruce (bruceinbangkokatgmaildotcom)


I've now built several different antennas for the wi-fi. The dish works very well and about the same, as far as signal strength goes, but better in noise rejection is a "Cantenna" I think that they called it. Basically just a tube, calculated as a wave guide, with a radiator

1/4 wavelength from the closed end.

I'm not sure whether this is what you were recommending as there is also a "Pringles Can" that uses reflectors and directors inside the tube.

However, the recommended length of the "Cantenna" seems to be one wave length. Which is about 8 inches. Because of what I welded together to make the tube mine ended up 12 inches long, about 1.5 wave length. Dom you think cutting the tube to 1 wave length improve signal strength?

Secondly, I am now getting greedy. Since the Cantenna and the dish each worked very well, thank you, I'm now thinking of combining the two. If I do that I am assuming that the mouth of the tube should be at the focus point of the dish? right?

Cheers,

Bruce (bruceinbangkokatgmaildotcom)

John Navas wrote in news: snipped-for-privacy@4ax.com:

and your purpose was?

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required