The simple soloution is to use 1 radio per antenna. You can't expect to split
a TX signal to 2 antennas and not get nulls everywhere. Think about throwing 2
stones into a pond, the waves created by each stone are going to interact
creating peaks & troughs (constructive & destructive interference points), now
extend this idea into 3 dimensions and hopefully, you'll realize what you're
doing wrong.
*********** REPLY SEPARATOR ***********
On 2004-07-13 at 9:21 PM Blair Davis wrote:
>What I am trying to do is get 180-200 deg of coverage with H-pol. The
>location is at a lake shore and I do not wish to waste power by
>radiating toward the water.
>
>I have a similar setup using V-pol 120 deg sectors at another location
>that works just fine.
>
>--
>Blair Davis
>West Michigan Wireless
>269-686-8648
>
>A Division of
>Camp Communication Services, INC
>
>
>>Of course you're going to have nulls! All over the place too, not just
>the center. That's a whacky setup you've got there... What are you trying
>to accomplish?
>>
>>*********** REPLY SEPARATOR ***********
>>
>>On 2004-07-13 at 6:23 AM Blair Davis wrote:
>>
>>
>>
>>>I currently have 2 16db H-pol sectors each with 100 deg beamwidth.
>>>
>>>I have a splitter and have carefully made the cables from the splitter
>>>to the sectors exactly the same length.
>>>
>>>I placed the sectors at the exact same height and at an angle centerline
>>>to centerline of 100 deg with a separation of about 5inch.
>>>
>>>It seems to work, but I have some odd gaps in the coverage. There seems
>>>to be a null about 10-15 deg wide in the middle of the 200 deg span....
>>>Also, the outer ends of the span have quite low gain.
>>>
>>>any ideas? Anyone done this before?
>>>
>>>
>>>Of course you're going to have nulls! All over the place too, not just
>the center. That's a whacky setup you've got there... What are you trying
>to accomplish?
>>
>>*********** REPLY SEPARATOR ***********
>>
>>On 2004-07-13 at 6:23 AM Blair Davis wrote:
>>
>>>I currently have 2 16db H-pol sectors each with 100 deg beamwidth.
>>>
>>>I have a splitter and have carefully made the cables from the splitter
>>>to the sectors exactly the same length.
>>>
>>>I placed the sectors at the exact same height and at an angle centerline
>>>to centerline of 100 deg with a separation of about 5inch.
>>>
>>>It seems to work, but I have some odd gaps in the coverage. There seems
>>>to be a null about 10-15 deg wide in the middle of the 200 deg span....
>>>Also, the outer ends of the span have quite low gain.
>>>
>>>any ideas? Anyone done this before?
>>>
>>>
>>>--
>>>Blair Davis
>>>West Michigan Wireless
>>>269-686-8648
>>>
>>>A Division of
>>>Camp Communication Services, INC
>>>
>>>
>>>_______________________________________
>>>
>>>_______________________________________
>>
>
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