I am looking for a chip which can amplify power supply at high frequency (from 400-500MHz). Can you help me? Thanks
The devices, power transistors,
that can give very high power at high frequencies ( 400-500MHz )
are some rare Radio Transmitter Transistors.
They are used for Radio Broadcast.
They are very, very expensive.
I would not think there are special high power RF chips.
that can give very high power at high frequencies ( 400-500MHz )
are some rare Radio Transmitter Transistors.
They are used for Radio Broadcast.
They are very, very expensive.
I would not think there are special high power RF chips.
Thanks for their advices. Do you have the detail cuircuit of this. I means the circuit is created by single elements such as : trans,...
What power?
There are RF power modules available for various frequency bands and power levels. Mitsubishi make a range. VHF modules are available up to about 30W output, UHF modules tend to be lower power up to about 10W.
Ebay quite often has them.
Beyond this, you will have to make something which is way OTT for this forum.
Frank
There are RF power modules available for various frequency bands and power levels. Mitsubishi make a range. VHF modules are available up to about 30W output, UHF modules tend to be lower power up to about 10W.
Ebay quite often has them.
Beyond this, you will have to make something which is way OTT for this forum.
Frank
Hi,
there are RF amplifier chips used to boost aerial signals before reaching the tuner input.
I think they work from 100MHz to 500MHz.
there are RF amplifier chips used to boost aerial signals before reaching the tuner input.
I think they work from 100MHz to 500MHz.
Have a look through the modules here:
http://www.rfparts.com/module_m.html
It looks like they have a couple that are about that power/freq range.
http://www.rfparts.com/module_m.html
It looks like they have a couple that are about that power/freq range.
Now I am doing a circuit about 433 Mhz. I found suitable chip for my project. But when I do the power amplifier with IC : RF2126. It requires power input : 19dbm min. However my signal has only 5dbm. Can you have a circuit to amplify my signal to 19dbm. I do not have much knowledge about this problems so it is very difficult for me to calculate the value of the components. I wait for your advices and helps. Thanks
You might be able to find a MMIC that will give you that kind of gain.
http://en.wikipedia.org/wiki/Monolithic_Microwave_Integrated_Circuit
Some examples are the MiniCircuits MAR/MAV,etc ranges.
(Hum,perhaps those are now discontinued? I don't see them on the site.)
Here's a similar product;
http://www.minicircuits.com/cgi-bin/modelsearch?model=GVA-84+
Agilent also makes some MMIC amps..
http://en.wikipedia.org/wiki/Monolithic_Microwave_Integrated_Circuit
Some examples are the MiniCircuits MAR/MAV,etc ranges.
(Hum,perhaps those are now discontinued? I don't see them on the site.)
Here's a similar product;
http://www.minicircuits.com/cgi-bin/modelsearch?model=GVA-84+
Agilent also makes some MMIC amps..
Luckyboydtt said:
http://www.minicircuits.com/products/amplifiers_main.html Single chip, can be cascaded.
You are not reading the spec properly, the input conditions for specified output is o dBm, Gain is 27 dB, thus your 5dBm input signal will provide 32dBm output, but you will get 1dB gain compression.
Nico Ras said:
Sorry my mistake, RF2126 gain is 12 dB, thus cascade two amps to get 24 dB. then 5dBm +24dBm = 29 dBm
Luckyboydtt said:
RFM gives the circuit in the data sheet, cascading means putting two RF amps in series. To attenuate the signal from your source you need a T-resistor attenuator, the impedance should be based on looking into the T-network from either side. This is calculated by Z short circuit and Z open circuit.
If you are considering the mini-circuit solution, then the amp is a single chip with nothing else added. However, power supply decoupling is important, stray lumped elements could cause the circuit to oscillate.
It is not easy to build and performance test RF equipment without a spectrum analyser and signal generator.
Also this is not quite a forum for RF, I would say that you would get better information from a HAM radio forum.
You don't tell us much about the application either, but what you are doing is not quite nice because 433 MHz is the keyless entry band and with pushing 1 watt could jam other nearby users and preventing them from unlocking their cars.
This is a typical application for car-thieves running a 1 kHz AM signal jamming a user from locking his car in a car park and then....
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