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cantenna_directional_antenna_with_gain [2007/01/29 22:58]
mister_x created
cantenna_directional_antenna_with_gain [2010/11/21 15:51] (current)
sleek typos
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 Doc Revision: V1.0 \\ Doc Revision: V1.0 \\
 Date: 28 Jan 2007 \\ Date: 28 Jan 2007 \\
-By: New2Me ​\\+By: RF Peep \\
  
 ===== Introduction ===== ===== Introduction =====
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 It’s a can which contained dog food, any can of the same size will work. This one measure: It’s a can which contained dog food, any can of the same size will work. This one measure:
  
-Length = 170mm +Length = 170mm 
-Width = 100mm+Width = 100mm
 Length from inside bottom of can to centre of USB stick = 40mm Length from inside bottom of can to centre of USB stick = 40mm
  
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 It is highly directional and a few degrees left or right of the target will make a significant difference. It is highly directional and a few degrees left or right of the target will make a significant difference.
  
-The measured gain is around 13dB which is 20 times the strength of the USB stick without the can. This is amazing gain for the simplicity and “cheepness” of the system!+The measured gain is around 13dB which is 20 times the strength of the USB stick without the can. This is amazing gain for the simplicity and “cheapness” of the system!
 This is what I measured using professional measuring equipment from work, I’m astonished at the results myself! ​ This is what I measured using professional measuring equipment from work, I’m astonished at the results myself! ​
 Due to the internal construction of other USB wifi devices the gain may vary. Due to the internal construction of other USB wifi devices the gain may vary.
-Also by inserting the USB device the other way around could improve signal strength, it is all very device ​dependant. I then use a short length of USB cable to connect the PC to the Cantenna.+Also by inserting the USB device the other way around could improve signal strength, it is all very device ​dependent. I then use a short length of USB cable to connect the PC to the Cantenna.
  
 The size of the can is important when designing a proper antenna system, however, the parameters of this can are in fact not the correct ones for the frequency of wifi but as you will see, work very well and are a compromise. The size of the can is important when designing a proper antenna system, however, the parameters of this can are in fact not the correct ones for the frequency of wifi but as you will see, work very well and are a compromise.
cantenna_directional_antenna_with_gain.1170107931.txt.gz · Last modified: 2007/01/29 22:58 (external edit)