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kaefer
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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 Posted: Thu Mar 23, 2006 9:02 am Post subject: Re: Best (or highest gain) 1900MHz directional antenna? |
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Not all 14 db antennas are created equal . Alot of Companies want to fudge the numbers and come up with different measurements . Instead of DB they call it DBI or DBA . Wierd stuff. The arc antenna is a great unit but as far as I know it is 3 DB and it is not really made for outdoor use. I think you will find in your situation the best way to go for signal improvement would be and amplifier . An amplifier with a properly aimed Yagi is a killer combination |
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Pick
EVDO Newbie
Joined: 23 Mar 2006
Posts: 2
Location: Gainesville, Florida
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| Posted: Thu Mar 23, 2006 10:39 am Post subject: |
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DBi indicates gain in DB over an isotropic radiator, which is a theoretical antenna that radiates equally in all directions, like a globe.
There is also a DB over a dipole, which is a more real world indicator. A dipole is 2.14 DB above an isotropic radiator, so just subtract 2.14 under the 14DBi figure to get a "real world" figure of 11.86 DB gain over a dipole. That is how it is SUPPOSED to work. Your mileage may vary.
A dipole antenna is usually the driven element in a yagi or dish antenna. |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 10:45 am Post subject: |
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Gordon,
I've got your CA-819 amp hooked up to the Yagi. This combo is getting me about -93dBm evdo signal strength.
I'm primarily wondering if there are any directional antennas that will offer better performance and higher gain than the maximumsignal.com yagi that I'm using now.
-Scott |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 10:59 am Post subject: |
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| kaefer wrote: | Gordon,
I've got your CA-819 amp hooked up to the Yagi. This combo is getting me about -93dBm evdo signal strength.
I'm primarily wondering if there are any directional antennas that will offer better performance and higher gain than the maximumsignal.com yagi that I'm using now.
-Scott |
If you do not have direct line of site . you might be better served with an Omni directional . The one problem with Yagi's are that they are very directional. Besides that I do not have any other answers. I do have a 17db Omni Directional Marine Antenna but that is the most power I have.I just heard about another antenna company the other day . I have no direct reviews on thier products but they claim to kick everyones butts. Here is the link
http://www.antenex.com/ |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 11:04 am Post subject: |
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| MaximumSignal wrote: |
If you do not have direct line of site . you might be better served with an Omni directional . The one problem with Yagi's are that they are very directional. Besides that I do not have any other answers. I do have a 17db Omni Directional Marine Antenna but that is the most power I have.I just heard about another antenna company the other day . I have no direct reviews on thier products but they claim to kick everyones butts. Here is the link
http://www.antenex.com/ |
I do not have direct line of site.
How much for the 17db omni? |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 11:11 am Post subject: |
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| kaefer wrote: | | MaximumSignal wrote: |
If you do not have direct line of site . you might be better served with an Omni directional . The one problem with Yagi's are that they are very directional. Besides that I do not have any other answers. I do have a 17db Omni Directional Marine Antenna but that is the most power I have.I just heard about another antenna company the other day . I have no direct reviews on thier products but they claim to kick everyones butts. Here is the link
http://www.antenex.com/ |
I do not have direct line of site.
How much for the 17db omni? |
The 17db Marine antenna is $119.95 plus $12.95 shipping |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 12:01 pm Post subject: |
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Gordon,
OK, let me make sure I'm clear on this. You sell a 17db Omni Directional Marine Antenna and a 14db Yagi antenna? These are not 17dbi (14.86db actual) and 14dbi (11.86db actual)?
Also, how does your Omni Directional Marine Antenna compare to the Digital Antenna 288-PB 9dbi (6.86db actual) omni-antenna?
http://www.wpsantennas.com/index.asp?PageAction=VIEWPROD&ProdID=388
Thanks for the info,
-Scott |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 12:05 pm Post subject: |
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| kaefer wrote: | Gordon,
OK, let me make sure I'm clear on this. You sell a 17db Omni Directional Marine Antenna and a 14db Yagi antenna? These are not 17dbi (14.86db actual) and 14dbi (11.86db actual)?
Also, how does your Omni Directional Marine Antenna compare to the Digital Antenna 288-PB 9dbi (6.86db actual) omni-antenna?
http://www.wpsantennas.com/index.asp?PageAction=VIEWPROD&ProdID=388
Thanks for the info,
-Scott |
All our measurements are in DB not DBi so the number is the number. Our unit is 24 inches long Includes 20 feet of low loss cable and mounting hardware . It is self contained. The Digital unit if you read down the listing is just the antenna everything else is extra . |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 12:08 pm Post subject: Re: Best (or highest gain) 1900MHz directional antenna? |
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| MaximumSignal wrote: |
The arc antenna is a great unit but as far as I know it is 3 DB and it is not really made for outdoor use. |
According to the link above the Arc antenna has a rated wind velocity of 125 and has gain of 20.8dBi (18.66db actual).
I think it is made for outdoor use. Where did you get the 3 DB figure? |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 12:11 pm Post subject: Re: Best (or highest gain) 1900MHz directional antenna? |
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| kaefer wrote: | | MaximumSignal wrote: |
The arc antenna is a great unit but as far as I know it is 3 DB and it is not really made for outdoor use. |
According to the link above the Arc antenna has a rated wind velocity of 125 and has gain of 20.8dBi (18.66db actual).
I think it is made for outdoor use. Where did you get the 3 DB figure? |
Sorry ,I thought you were referring to the Arc antenna Michael sells. Boy that must be some antenna for $1100.00 |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 12:13 pm Post subject: |
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| MaximumSignal wrote: |
All our measurements are in DB not DBi so the number is the number. Our unit is 24 inches long Includes 20 feet of low loss cable and mounting hardware . It is self contained. The Digital unit if you read down the listing is just the antenna everything else is extra . |
Wow. Now that I'm educating myself on terminology (db, dbi, dbd...) you sell very nice antennas at very nice prices!
So your 17DB omni marine antenna should blow the Digital Antenna omni antenna (6.86db actual) out of the water. No pun intended. Well, maybe... |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 12:20 pm Post subject: |
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| kaefer wrote: | | MaximumSignal wrote: |
All our measurements are in DB not DBi so the number is the number. Our unit is 24 inches long Includes 20 feet of low loss cable and mounting hardware . It is self contained. The Digital unit if you read down the listing is just the antenna everything else is extra . |
Wow. Now that I'm educating myself on terminology (db, dbi, dbd...) you sell very nice antennas at very nice prices!
So your 17DB omni marine antenna should blow the Digital Antenna omni antenna (6.86db actual) out of the water. No pun intended. Well, maybe... |
I really try to keep prices down . I do not believe in gouging people . My whole business has been built on treating people right , great product , great prices. That is why 85% of my business now comes from referrals . I get the odd customer that will not listen to me when I try to trouble shoot thier problems and think I am a a##hole but for everyone of them I have a hundred that swear by my product service and prices. Inteligain?* even gets on me to raise my prices at times |
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kaefer
EVDO User
Joined: 05 Dec 2005
Posts: 66
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| Posted: Thu Mar 23, 2006 12:25 pm Post subject: Re: Best (or highest gain) 1900MHz directional antenna? |
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| MaximumSignal wrote: | | kaefer wrote: | | MaximumSignal wrote: |
The arc antenna is a great unit but as far as I know it is 3 DB and it is not really made for outdoor use. |
According to the link above the Arc antenna has a rated wind velocity of 125 and has gain of 20.8dBi (18.66db actual).
I think it is made for outdoor use. Where did you get the 3 DB figure? |
Sorry ,I thought you were referring to the Arc antenna Michael sells. Boy that must be some antenna for $1100.00 |
$715 actually. Still very very expensive.
Bear with me here....here comes a hypothetical situation:
The Arc antenna is about 18.66DB but is directional while your marine antenna is 17DB but is omni-directional. If both antennas were 17DB would they both operate equally as well in a given enviroment (assuming the directional antenna is aimed correctly)?
Or, is a 17DB directional antenna more efficient than a 17DB omni when aimed properly, since the energy is focused at the tower versus radiating in all directions? |
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MaximumSignal
EVDO Vendor
Joined: 08 Apr 2005
Posts: 586
Location: Cheektowaga, NY
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| Posted: Thu Mar 23, 2006 1:06 pm Post subject: Re: Best (or highest gain) 1900MHz directional antenna? |
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$715 actually. Still very very expensive.
Bear with me here....here comes a hypothetical situation:
The Arc antenna is about 18.66DB but is directional while your marine antenna is 17DB but is omni-directional. If both antennas were 17DB would they both operate equally as well in a given enviroment (assuming the directional antenna is aimed correctly)?
Or, is a 17DB directional antenna more efficient than a 17DB omni when aimed properly, since the energy is focused at the tower versus radiating in all directions?[/quote]
I would say in theory the 17 db directional should be more efficient |
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