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VHF dipole antenna question.

RadioChief55

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I have elements for a VHF dipole antenna like the one in the picture. I have to mount them to a pipe. Question 1 is, does the diameter of the pipe matter? Question 2 is, can I mount a UHF Yagi on the same pole above or below the elements? I'd like to streamline my antenna array by eliminating the mast's for each antenna and combine some. Thanks. JP
 

mmckenna

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I have elements for a VHF dipole antenna like the one in the picture. I have to mount them to a pipe. Question 1 is, does the diameter of the pipe matter?
No, as long as it will support the antennas, it's not important. The clamp size will dictate what will work. Proper spacing from the pipe will impact radiation pattern.

Question 2 is, can I mount a UHF Yagi on the same pole above or below the elements? I'd like to streamline my antenna array by eliminating the mast's for each antenna and combine some. Thanks. JP
Yes. Keep the Yagi separated from the dipole by 2 feet or so.
 

RadioChief55

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No, as long as it will support the antennas, it's not important. The clamp size will dictate what will work. Proper spacing from the pipe will impact radiation pattern.



Yes. Keep the Yagi separated from the dipole by 2 feet or so.
Thank you for the info. I don't know what happened to the picture. LOL. Ill try to post it again.
 

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ko6jw_2

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A couple of years ago we installed a Telewave array similar to the one in your post. There are a number of variables involving the phasing harness, the vertical distance between elements and the offset from the support. These will affect gain and directional pattern. The phasing harness is supplied by Telewave. The offsets were determined on site based on the desired coverage pattern. It could be omni, bidirectional or cardioid. Ours is mounted on a mast at the top of a 40ft. tower. All other antennas are on cross arms below the dipoles. We are using heliax to feed the array.
 
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