Jump to content
  • 0

Directional Repeater Antenna


Question

Posted

Hey all, I have a VHF/UHF Cross band Repeater, and am looking for a dual band directional antenna, I figured I could ask here without being murdered as I have been before on RR. I don't know what information y'all need but I've done some looking around and have yet to find a dual band directional antenna, I'm looking for 180°. Thanks :)

6 answers to this question

Recommended Posts

  • 0
Posted

You could buy a small 7-10 dB Yagi (dual band) with a small rotor and can control the direction with no issues. Make sure u buy Yagi for use on gmrs crews or trim it accordingly.

 

Sent from my SM-T357T using Tapatalk

  • 0
Posted

Well the repeater is at a spot that will not cover anything East, at all, however, it'll cover everything West. It cuts off North and South at basically 180 degrees. Instead of transmitting towards the areas I can't cover, I figured why not have it with a directional antenna facing the direction I can cover so it can focus it in that area.

 

I attached the image of the coverage, it has full line of sight with the city of Dallas, the red circle is the repeaters location, the black is where the coverage ends or I will have no coverage.

 

(Won't let me attach the correct image, check my next reply for the correct one)

  • 0
Posted

Well, avoiding questions of application and legality...

 

I suspect you are going to have a real problem finding something meeting the description you provided. However, given the difference in frequency, why not just use two antennas? It will still be hard to find much below 1 or 2gHz that would meet your needs for directionality. But it would be easier than finding a dual-band directional antenna.

 

However, I think you'll quickly run into the issue of diminishing returns. If you can actually find 2 antennas meeting your needs and also providing any useful gain, you will probably be in the $200+ range, per antenna and the difference in gain from a high-quality vertical antenna would probably be around 3db.

 

My guess is you'd be better off by spending your money improving your feed line and connectors and removing any adapters and then buying a high quality dual-band vertical which should get you gain of 8+dm VHF and 11+ UHF. (Eg. http://www.theantennafarm.com/catalog/comet-gp-9nc-1087.html )

 

You might play with placement of a reflector behind a dual-band vertical omni. But, that would really be hit or miss and you'd have to have the proper test equipment, time and interest.

 

anyway, just my 2 cents worth

  • 0
Posted

Well, avoiding questions of application and legality...

 

I suspect you are going to have a real problem finding something meeting the description you provided. However, given the difference in frequency, why not just use two antennas?  It will still be hard to find much below 1 or 2gHz that would meet your needs for directionality. But it would be easier than finding a dual-band directional antenna.

 

However, I think you'll quickly run into the issue is one of diminishing returns. If you can actually find 2 antennas meeting your needs and also providing any useful gain, you will probably be in the $200+ range, per antenna and the difference in gain from a high-quality vertical antenna would probably be around 3db.

 

My guess is you'd be better off by spending your money improving your feed line and connectors and removing any adapters and then buying a high quality dual-band vertical which should get you gain of 8+dm VHF and 11+ UHF.   (Eg. http://www.theantennafarm.com/catalog/comet-gp-9nc-1087.html )

 

You might play with placement of a reflector behind a dual-band vertical omni. But, that would really be hit or miss and you'd have to have the proper test equipment, time and interest.

 

anyway, just my 2 cents worth

 

Thanks for putting the first sentence in there.. Lol.. Alright, appreciate the cents. ;)

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Answer this question...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Guidelines.