The addition of the “horn” gives the antenna about 5-6dB more gain vice the bare waveguide. 0 Comments Now you can build your cantenna with just one tin but chances are you wont meet the suggested overall minimum 3/4 wave length required when using the. You get more gain with a longer waveguide, at the expense of beamwidth.įor additional gain, have a look at his “Bazooka Cantenna” article near the bottom of the page. The additional cans will give you a narrower radiation pattern (than you would get with a single can) which may or may not be what you want.
One of the primary advantage of round polarized yagi antenna will be that installer person can modify the polarization at any time after antenna purchase.
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A 4-can one is the longest I tried I didn’t write down the gain testing results, but it was considerably better than the 1-can antenna. Cantenna Wifi Calculator Install Our VHFUHF For high performance guarantee we suggest to install our VHFUHF round polarized yagi anténnas at a height of 25-30 feet above the ground level. The interactive map temporarily out of order. Inserted data are not stored or processed. I’ve found that adding more cans indeed increases the gain. Application serves for approximate radio link budget compute. The ARRL Antenna book recommends 2-3 waveguide wavelengths instead. He mentions something I’ve not seen in any of the other waveguide antenna construction articles.Ĭontrary to popular belief on the Internet, a can length of 3/4 the waveguide wavelength is not optimal. In addition to abcd’s recomendations (all very good ones I might add) you may want to look at this:
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