Author Topic: RF transceiver  (Read 4735 times)

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Offline mr.SanTopic starter

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RF transceiver
« on: April 19, 2011, 05:20:03 am »
'm working on a rf project.Could any one suggest me an RF transceiver (may even Point to Point or an multipoint) but should 've an area coverage of 5000 mts (5 kilometers).....

Regards
Sans
 

Offline tnt

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Re: RF transceiver
« Reply #1 on: April 19, 2011, 10:13:29 am »
5km is quite a lot ... and your description is a bit short.

* Is it on flat open terrain ? Or 5 km in a huge underground bunker ?
* Any frequency band requirement (legal restrictions in your country) ?
* What kind of data ? Voice / Digital / Analog stuff ? What bandwidth/bitrate ?
* Power supply available ?
* Size ? Antenna size ?
...
 

Offline mr.SanTopic starter

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Re: RF transceiver
« Reply #2 on: April 19, 2011, 07:20:24 pm »
Sorry dude 'm new to this kindda of forums ('d be appropriate to tell for the internet either).
Comin to the point.
It is in open terrain / Frequncy band similar to that of any gsm carriers
Type of data : Digital
bandwidth / bitrate : 'm not sure
power supply : very min power supply
Size : Yet to decide ()
 

Offline bilko

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Re: RF transceiver
« Reply #3 on: April 19, 2011, 07:38:35 pm »
This is poor spec, but here's a start. Wifi with parabolic antenna.
 

Offline mr.SanTopic starter

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Re: RF transceiver
« Reply #4 on: April 22, 2011, 06:15:38 pm »
This is poor spec, but here's a start. Wifi with parabolic antenna.


dude thn can help wat are the things to be done for accurate specifications ?
 

Offline bilko

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Re: RF transceiver
« Reply #5 on: April 22, 2011, 06:49:03 pm »
You've answered some already,
Bitrate / bandwidth would be useful. Are you sending a few bytes or streaming video for example ?
Do you have line of sight ?
Point to point or network / mesh ?
Fixed or mobile installation ?

There are many bands available and 5km is easy achievable with the correct antenna




 

Offline mr.SanTopic starter

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Re: RF transceiver
« Reply #6 on: April 22, 2011, 06:58:04 pm »
'm wannin to send 48 kb encrypted data
no i don 've line of sight hence 'm thinkin of RF
Fixed intallation with mesh n/w's :)
 

Offline bilko

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Re: RF transceiver
« Reply #7 on: April 22, 2011, 07:12:43 pm »
Open terrain ? but not line of sight.
What obstacles do you have in the way ?
trees / buildings.
Do you have a topography map, you can use google earth to get details of elevations and obstacles, bear in mind that the data may be a few years old so if new buildings have been constructed you will have to take this into account
 

Offline mr.SanTopic starter

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Re: RF transceiver
« Reply #8 on: April 22, 2011, 07:31:11 pm »
Open terrain ? but not line of sight.
What obstacles do you have in the way ?
trees / buildings.
Do you have a topography map, you can use google earth to get details of elevations and obstacles, bear in mind that the data may be a few years old so if new buildings have been constructed you will have to take this into account


Yaaaa its not completey open terrain coz its a deep outskirts of city. 've obstacles like trees buildings even wind . .
Also antenna height matters as i need a compact one - hence i belive that no Line Of Sight 'd be obtained  ???
 

Offline philbx1

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Re: RF transceiver
« Reply #9 on: April 24, 2011, 11:02:20 am »
Maybe one of these?

From memory I think they have a transceiver that does 4500 metres.
Maybe with mini yagi antennas...

http://en.51sunray.com/products_list/&pmcId=3ebbe63b-196a-43d2-88e5-45f82d637c8d&comp_stats=comp-FrontProductsCategory_show01-1276239712152.html
 

Online Psi

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Re: RF transceiver
« Reply #10 on: April 24, 2011, 11:55:07 am »
1Watt at 900mhz, up to 40miles in open area with high gain antenna
http://www.sparkfun.com/products/9411


They have some other lower power ones too that might be suitable
http://www.sparkfun.com/products/9087


downside is i'm pretty sure they're illegal in AUS/NZ due to their frequency band


« Last Edit: April 24, 2011, 12:00:59 pm by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline mr.SanTopic starter

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Re: RF transceiver
« Reply #11 on: May 10, 2011, 02:21:35 pm »
@ above all
 thanks guys you 've really  given me up a gr8 ways. .  'm workin on it ............ hope 'll achieve it in a short while..
« Last Edit: May 12, 2011, 11:37:46 pm by mr.San »
 


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