Yahkin
join:2003-11-28
Fort Atkinson, WI
| What's better? Higher Radio Output or Antenna Gain
The question is the topic.
I am looking at a couple different options for CPE's, and they both come in at the same EIRP +-1. They just get there in different ways. I'm curious which is better.
First CPE
Radio - 80mW (19dBw)
Antenna - 19dBi
EIRP - 38dB
Second CPE
Radio - 250mW (24dBw)
Antenna - 15dBi
EIRP - 39dB
Both CPE's appear to be using the Osbridge 24XL radio which according to their website outputs 19dBw. I know the first does for sure. The second does not say, but the web admin is identical. I can only assume then that the latter radio must have a small amplifier integrated in order to achieve the 250mW radio output. The price of the latter is about $40 more.
I don't want to taint peoples responses by giving the distributors, but if you follow these threads closely you will probably not have much trouble figuring out who they are. 
Any thoughts and opinions are greatly appreciated.
Thanks |
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VariableARK
join:2003-03-17
USA | Re: What's better? Higher Radio Output or Antenna
higher gain antennas are going to better, less interference with them. i would go with whatever is cheapest |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| Lets try this. Antenna gain is ALWAYS preferred over radio gain or output power. An antenna is a passive device, where a radio must take any given signal and amplify it to get it to the power level spec'ed on the radio. Would You rather kiss a real woman(Assuming You are a man:D ) or a blow up doll?.
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aSic
application specific
Premium
join:2001-05-17
Wakulla, FL
clubs:
| said by superdog  :Would You rather kiss a real woman(Assuming You are a man:D ) or a blow up doll?. You know, I dont get out near as much as a 24 year old hottie stud like myself should, so I'd take whatever I could get.  ;) lol
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Teamwork is a lot of people doing what I say. | ircd.removed.us #dslr | Starband SRS m360 GE4 C4/S69 | Win2003/DualNIC | 802.11b |
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aSic
application specific
Premium
join:2001-05-17
Wakulla, FL
clubs: | reply to Yahkin
Seriously though, superdog is right on the ball. Go with the bigger ear instead of the bigger mouth. |
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namespace
join:2002-12-22
31337
| said by aSic :Seriously though, superdog is right on the ball. Go with the bigger ear instead of the bigger mouth. I hope you're referring to antennas and not blow-up dolls.  |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| You guys are hogs!!!:D (But I love You!!)
No, I am not like that You perv's!:o
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DaDogs
Semper Vigilantis
Premium
join:2004-02-28
Deltaville, VA
| reply to Yahkin
This thread is priceless ...
Yahkin just remember that antenna gain adds to both end of the link.
16 dBm + 11 dBi = 27 dB EIRP
10 dBm + 17 dBi = 27 dB EIRP
The second system talks as loudly as the first but it HEARS twice as good (by range) and four times as good (by power).
That presumes the receive sensitivities are identical.
And as SuperDawg mentioned, a narrower pattern on the CPE is less sensitivite to interference ... but it is a bit harder to point.
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»www.freeantennas.com |
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mejimbo
join:2003-10-05
| reply to Yahkin
Re: What's better? Higher Radio Output or Antenna Gain
It depends on what your situation is.
If you have 100% pure line of sight, higher gain/less power, as others have advised. HOWEVER, if you don't have good LOS, then a lower gain antenna with more power seems to work a little better. It seems the lower gain antenna "gathers" the reflected signals better, but it needs all the power and receive sensitivity it can get in this situation.
My 2 cents........ |
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Yahkin
join:2003-11-28
Fort Atkinson, WI | reply to Yahkin
Thanks for all the input...blow-up doll references aside. |
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anoclon
join:2004-10-12
Guatemala
| reply to mejimbo
said by mejimbo :HOWEVER, if you don't have good LOS, then a lower gain antenna with more power seems to work a little better. It seems the lower gain antenna "gathers" the reflected signals better, but it needs all the power and receive sensitivity it can get in this situation. In about 10 months I've been reading and posting on this forum it's first time that I read something that could apply to my case and situation. In my base station I'm using a 2 watt amplifier. So far it's been working pretty good for me. |
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