RF Transmitter Amplifer

www.jaycar.com.au sells a rf transmitter module for use with digital data, the output is 3dBm, is there an opamp circuit to boost the output power? if not, any ic's that
can amplify or any transmitter ic's with higher output power?
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Warren Thai wrote:

Why do you want to increase the power output? If it is to increase range - can you not make better use of the power you have by using more directional transmitter and receiver aerials? A couple of nice 433MHz yagis should do nicely..and will possibly be a more legal solution than the one you are suggesting.
But it is easy enough to design a linear amp that will operate at UHF. (instability/ physical layout is the biggest problem)... Just search for UHF broadband amp designs.
--
Sue




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i'm thinking of doing a hobby project involving controlling a robotic device wirelessly. I'm thinking of using Jaycar transmitter and just want to boost the power a bit for better transmission. do you think this jaycar device is suitable for what i am trying to do? the catalog number for it is ZW3100 for transmitter and ZW3102 for receiver (or search "wireless module"). it says the output power is 3dBm, what would be the attenuation of air? so i'm only trying to transmit some digital control signals. i think this item is suitable.

3dBm,
that
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Warren Thai wrote:

What range do you want? Is there anything between transmitter and receiver (eg walls)? Are there any sources of interference nearby (eg arc welders)?
Those units work at UHF. Just like lighthouses and telescopes use lenses and reflectors to make the most of the lamp power- it is possible to get "better transmission" using reflectors and directors with your radio link. That should be the first thought and not just using a more powerful transmitter. Simple reflectors at both ends will have a much greater effect than doubling the transmitter power..

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Furthermore to the last post I posted, www.altronics.com.au has a product cat # Z6900. the datasheet shows an output power of 10mW, is it correct to say the output is 10log(10)dBm? hence more power than the jaycar transmitter?

3dBm,
that
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