Tiny 19200 baud 5km radius radio modem

[Paul Keinanen]

Is there any commercially available tiny (to be carried in model airplane)
radio modems capable of communicating (full-dublex) at rate of 19200 baud
(or faster) in a radius of up to 5km?

For full duplex operation, you need two separate frequencies, one for
uplink and the other for downlink. If you intend to put these
frequencies on the same frequency band, you need very good filters to
keep away the transmitter power from receiver. For sufficient
selectivity, some form of cavity resonators would have to be used,
which would be far too heavy for model airplane.

I would suggest using the aircraft control frequency (typically around
40 MHz depending on country) for uplink and perhaps 27 MHz or 2450 MHz
for downlink, if it is allowed to operate airborne transmitters at
these frequencies in your country.

Paul

 

[Alan Rutlidge]

And where are you from Phil? Where is your family line imported from?

Phil was created. Look on the crown of his head to see 3 small 6's.

 

[Phil Allison]

WARNING: To all aus.electronics readers !!!


Alan Rutlidge is a Criminal Lunatic

Alan Kendall Rutlidge of 15 Ruth Street Northbridge, WA (aka The Arse
Bandit Fuckwit ) is a congenital, scumbag liar.

He has lied through his backside for every day of his whole life.

He first lied to his parents about his perversions.

He then lied to his teachers about the same thing.

He then continued lying to Telstra where they sheltered the evil sod for 26
years. But the guys around him knew what he was.

No lie whatever is beneath or beyond him.

Rutlidge is a consummate and fluent liar.

There is no-one he will not try to deceive.


Such an individual is an evil public menace.



.......... Phil

 

[swanny]

** The ANO that allows R/C aircraft to fly prohibits all out of visual
range operation.

What are you planning ?




......... Phil

There are a number of small spread-spectrum systems that will do this,
but only line-of-sight. They are very expensive though.

 

[Phil Allison]

"swanny"



** Why did you reply to my post instead of the OP's ??




........... Phil

 

[dmm]

Is there any commercially available tiny (to be carried in model airplane)
radio modems capable of communicating (full-dublex) at rate of 19200 baud
(or faster) in a radius of up to 5km?

Check out the Xtream series of radio modems from MaxStream.
http://www.maxstream.net

 

[Eljin]

Do I sense a little animosity here?

 

[Alan Rutlidge]

Do I sense a little animosity here?

No. It's called net-stalking. Cowardly little Phil is just a gutless
troll. He makes a habit of posting stuff of a personal nature which is
usually 99% bullshit to a disinterested audience. Just ignore him.

Cheers,
Alan

 

[Phil Allison]

WARNING to all USENET readers:



** Alan Kendall Rutlidge of 15 Ruth Street Northbridge, WA (aka The Arse
Bandit ) is a congenital liar and criminal net stalker.

He has lied through his backside for every day of his whole life.

He first lied to his parents.

He then lied to his teachers.

He the continued lied to Telstra where they sheltered the evil sod for 26
years.

No lie whatever is beneath or beyond him.

Rutlidge is a consummate lair.

There is no-one he will not try to deceive.

Such an individual is an, evil public menace.





......... Phil

 

[Alan Rutlidge]

YAWN!

Phil, you must be slipping. Taken you about 36 hours to respond to this
one - ROFL.
Suffering from old timers' disease are you?

 

[toby]

... Just ignore him.

Can you do the same? Nobody wants to read either side of that exchange.
--T

 

[Heywood Jablome]

Check out the Xtream series of radio modems from MaxStream.
http://www.maxstream.net

I wonder whether you could hack a 900Mhz or 2.4Gig cordless phone. They work
for a couple of km. No doubt, if you have them transmitting up in the sky,
their range will be much better than on the ground.

Is this for a UAV project?