antenna input voltage amplification @433MHz - Electronic Circuits Projects Diagrams Free

micael · 21st August 2006, 04:08 PM

Hi,
Is there a way to amplify the input voltage from an antenna that receives 433MHz signal, using opamps i.e TLV2402 or 741?

Does anyone knows a place in UK were its possible to buy Linear RF Power Amplifier ?

**Nigel Goodwin** · 21st August 2006, 04:21 PM

Quote:

Originally Posted by micael

Hi,
Is there a way to amplify the input voltage from an antenna that receives 433MHz signal, using opamps i.e TLV2402 or 741?

No!.

Quote:

Does anyone knows a place in UK were its possible to buy Linear RF Power Amplifier ?

Plenty of places, but you need to be licenced!.

stevez · 21st August 2006, 05:59 PM

In the first question - if you are asking if you can amplify the signals received by an antenna the answer is yes and it is called a pre-amplifier. If you want to increase the power going out of the antenna then Nigel's answers apply.

audioguru · 21st August 2006, 06:16 PM

An old 741 opamp can deliver full output at frequencies lower than only 9kHz.

JimB · 21st August 2006, 10:34 PM

Have a look here:
http://www.electro-tech-online.com/e...plifier-2.html
for a suitable 432Mhz pre-amp.

JimB

zachtheterrible · 23rd August 2006, 01:39 AM

Hi micael. Have a look at this: http://www.linxtechnologies.com/inde...ory=bba_series

It's the BBA-332.

I used this little pre-amp in a 900MHZ analog mic project, and it more than doubled the range. It has a +20dB gain and a gain flatness of +-2dB from 100MHZ to 2GHZ, so it should work well with 433MHZ.

Although I'm not sure exactly how impedance matching works in regards to antennas and rx/tx, it has a 50 ohm input and output.

It's about $10 on digikey. and best of all, it can't get much simpler!

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21st August 2006, 04:08 PM	(permalink)
micael	antenna input voltage amplification @433MHz Hi, Is there a way to amplify the input voltage from an antenna that receives 433MHz signal, using opamps i.e TLV2402 or 741? Does anyone knows a place in UK were its possible to buy Linear RF Power Amplifier ?

21st August 2006, 05:59 PM	(permalink)
stevez	In the first question - if you are asking if you can amplify the signals received by an antenna the answer is yes and it is called a pre-amplifier. If you want to increase the power going out of the antenna then Nigel's answers apply. __________________ stevez

21st August 2006, 06:16 PM	(permalink)
audioguru	An old 741 opamp can deliver full output at frequencies lower than only 9kHz. __________________ Uncle $crooge

21st August 2006, 10:34 PM	(permalink)
JimB	Have a look here: http://www.electro-tech-online.com/e...plifier-2.html for a suitable 432Mhz pre-amp. JimB __________________ Experience is directly proportional to the value of the equipment ruined.

23rd August 2006, 01:39 AM	(permalink)
zachtheterrible	Hi micael. Have a look at this: http://www.linxtechnologies.com/inde...ory=bba_series It's the BBA-332. I used this little pre-amp in a 900MHZ analog mic project, and it more than doubled the range. It has a +20dB gain and a gain flatness of +-2dB from 100MHZ to 2GHZ, so it should work well with 433MHZ. Although I'm not sure exactly how impedance matching works in regards to antennas and rx/tx, it has a 50 ohm input and output. It's about $10 on digikey. and best of all, it can't get much simpler! __________________ I'm no electronics god, i just talk too much.