Re: [PLUG] [plug-announce] Reminder: Alpha Labs Wifi/802.11b antenna workshop (with a little more explanation)

[Paul <paul@dpagin.net>]

rolando de aguiar wrote:

> Anyway, coffee will be served. Maybe other beverages too. It will be fun.
>  

A good can to use is a 26.5 ounce Bush's Baked Beans or Hunts Pasta 
Sauce can.  It's 3.25" in diameter and 5.62" long. 
http://www.turnpoint.net/wireless/antennas/hunts.html

My design uses two Bush's cans end to end held together with aluminum 
splints. More aluminum was used to create a mounting bracket with a slot 
for adjusting elevation. A planned modification is a movable back to 
adjust the 1/4 wavelength distance from the back to the probe.

Impedence matching is a thought, but I don't have a clue about it yet.

Originally, I was going to use a BNC connector, but I decided to go with 
a big N connector which seems to be a standard for antennas.  The cable 
is about 11 feet of LMR-195 cable terminated by a reverse SMA connector 
at the PC end.  (I really wanted LMR-400, but I compromised.)

I would almost recommend modifying any equipment using non-standard 
connectors.  For example, changing reverse a SMA or TNC connectors to a 
regular SMA, TNC, or other preferred microwave frequency connector.

Cantennas are fun, relatively easy to build, and very effective.

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