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Message |
    
Marconi
Advanced Member
Username: Marconi
Post Number: 791
Registered: 11-2001
| | Posted on Monday, August 18, 2008 - 7:03 pm: | 
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I have a question. I see it written and discussed that a J-Pole does not radiate from the bottom 1/4 wave element because of an antenna rule that states: two elements that are close and parallel with equal current magnitude and opposite phase will show cancellation of RF.
If true, what would happen if there were 4 - 1/4 wave elements surrounding the radiator (like the Sigma IV) instead of only one like in the J-Pole? |
Tech237
Moderator
Username: Tech237
Post Number: 1052
Registered: 4-2004
| | Posted on Monday, August 18, 2008 - 7:50 pm: |
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It still would not radiate from the bottom quarter wave, as the current on the shield of teh coax, which is the side connected to those stubs would now be equally split across all the stubs.
Simon
Tech237
N7AUS
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