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Please recommend an amplifier chip !

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flybird23

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Please recommend an amplifier chip
The following of index
Frequency 10-500MHz
small signal Gain(min) 17dB
Gain flatness(max) 0.2dB
Reverse isolation 36dB
Noise Figure 4dB
Power output 1dB 8dBm
ip3 20dBm
ip2 28dBm
second order harrmonic 32dBm
vswr input/output(max) 1.5：1/1.1：1
dc current (max) 33mA
 

Mini-Circuit is good.
You might want to take a look at Sirenza

h++p://w\/\/w.sirenza.com/

Cheers
 

thanks, I have already looked for on websites of these two companies. but Reverse isolation 36dB can't be satisfied . Where can find so high isolation ampifier.
 

Maybe you can try Analog Devices.
Here is an example:
**broken link removed**
 

You can connect two MiniCircuit amplifiers in cascade. S12 vill be the sum of them both. Use PI-type attenuators at input, between amp's and at output to achieve correct overall gain AND to serve for low input/output VSWR. Careful PCB layout is important to maintain S12 isolation.
 

Thank everybody's replies . vswr ,This is really a kind of method 。But the total electric current is limited within 33mA, so it is difficult to use two amplifiers.
 

try with a signal transistor with emitter feedback and collector feedback
 

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