| Author |
Message |
    
Magnum410
| | Posted on Tuesday, February 26, 2002 - 10:45 pm: | 
|
Will the A99 Cophase kit work with a pair of Imax2000 |
Einstein_667
| | Posted on Tuesday, March 05, 2002 - 6:50 pm: |
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Yep |
Magnum410
| | Posted on Thursday, March 07, 2002 - 4:11 am: |
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Cool!!!
Thanks |
Bullseye
| | Posted on Saturday, March 09, 2002 - 12:19 am: |
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If anyone catches this I'm just wondering has anyone ever tried to co-phase a pair of Maco V58's and how does this idea sound if it has'nt already been tried? |
Galileo
| | Posted on Sunday, March 10, 2002 - 4:45 pm: |
|
Bullseye,
GOOD question....Can someone explain a bit about co-phasing? Thanks.....Tom |
Einstein_667
| | Posted on Tuesday, March 12, 2002 - 3:50 pm: |
|
When You Co-Phase two ground plane it zeros out the blocking effects of nearby buildings and vegitation.
Essentially all it does is make the ground planes more omnidirectional.
With beams, when you cophase them or stack them as some people call it, it increases the gain between the two antennas depending on the size of the beams used. This can be used to make two stacked three elements out talk one set of six elements.
When you cophase beams it improves recieve and transmit gain but when you cophase vertical ground planes, it only makes it more of a true omnidirectional and will only improve transmit and recieve in those directions that otherwise would be affected by obstructions to the radiated signal of a single ground plane.
Hope this answers your questions about co-phasing. |
Bullseye
| | Posted on Wednesday, March 13, 2002 - 8:55 am: |
|
So in other words,yes it would work and improve both TX and RX. |
Einstein_667
| | Posted on Wednesday, March 13, 2002 - 8:46 pm: |
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It would work, but it would only improve TX and RX in those directions that you were experiencing problems.
In those other directions you would experience no difference from a single ground plane. |
Pcovington
| | Posted on Saturday, April 27, 2002 - 5:22 pm: |
|
Co-phasing two omnidirectional vertical antennas does not make them more omnidirectional. If the two antennas are seperated by 18 feet then the radiation pattern will be similar to a vertically polarized full wave loop antenna. It will have nulls in the plane of the two antennas and maximum radiation in the plane perpendicular to the two antennas. Picture a figure-8 pattern. Because the radiation pattern is no longer omnidirectional there is some gain in this arrangement over a single vertical antenna.
Phil |
409
| | Posted on Monday, April 29, 2002 - 2:29 am: |
|
Your right Phil......depending on the distance between the antennas, it will in fact make them more directional than just one antenna. Think about it......this is the principal behind all beam antennas and how they direct the signal. |
