Cantenna
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A cantenna (a portmanteau blending the words can and antenna) is a homemade directional waveguide antenna, made out of an open-ended metal can.
Cantennas are typically used to increase the range of (or discover) Wi-Fi networks.
Construction
The cylinder portion of the can may consist of metal-coated paperboard.
Although some designs are based on a Pringles potato chips can, this tube is too narrow to increase the 2.4 GHz signal by a useful amount, although at 5 GHz it would be about the right size.[1] However, a cantenna can be made from various cans or tubes of an appropriate diameter.[2] Some designs include a pole mount to elevate the cantenna.[3]
At 2.4 GHz, losses can occur if the cable from the cantenna to the Wi-Fi circuitry is too long. A more efficient cantenna can be made by minimising this length or connecting the cantenna directly to the Wi-Fi circuitry.[4]
Use
Cantennas are typically used for extending a wireless local area network (WLAN).
The tiny design makes them ideal for mobile applications such as wardriving.
Cantennas can be used to increase cell phone range,[5] improve reception, and decrease noise.
A cantenna can be used as a satellite dish feed horn. The 5.5 GHz cantenna dimensions are almost perfect in that they make a perfect fit for the standard TV satellite dish. The resulting setup is a low-cost high-quality high-gain antenna.[6] Such setups are widely used in wireless community networks for long-distance Wi-Fi links.
Cantennas may be used with other RF devices such as wireless security cameras.[7]
See also
References
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<references />, or <references group="..." />External links
- Extend your wireless network by building a Wi-Fi cantenna
- Amateurlogic Episode 3 (Construction details for a more efficient cantenna)
- Waveguide Can-tenna
- Youtube video on How To Build A low loss Cantenna
- How To Build A Tin Can Waveguide Antenna
- Do-It-Yourself Wireless Antenna Update
- Cantenna Calculator
- How to build Cantenna (Video)[dead link]
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- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Amateurlogic Episode 3 (Construction details for a more efficient cantenna)
- ↑ MAKE: Blog: Cell phone - Cantenna diagram and parts list[dead link]
- ↑ 5.5 GHz cantenna as a satellite dish feed
- ↑ Cantenna.com User Guide
