Amplifiers don't Amplify signal

Hi BMOTO,

                 I need a diagram of your test circuit and equipment.

Regards,

Jim B 

This is My transmiter Block

At the output of the amplifier HMC863ALC4, I added the LNA HMC752ALC4,  then I added the downcoverter ADMV1014 and finally I added ADRV9008-1.

But I don't know why the amplifiers don't fonctionne correctly

At the output of the amplifier HMC863ALC4, I added the LNA HMC752ALC4,  then I added the downcoverter ADMV1014 and finally I added ADRV9008-1.

But I don't know why the amplifiers don't fonctionne correctly

Hi IBMOTO,

                      If your diagram is correct, you have the Amplifier installed backwards. J1 is RFIN it is connected to Pin3 of the DUT.

Regards,

Jim B

Oups 

In My real circuit, Amplifiers are connected correctly. I try to find solution at this problem since 3 weeks. 

I have followed your instructions step by step.

But I don't know why the amplifiers  refuse to work properly.

Why does the LNA let the signal pass without amplifying it?

Why is the PA attenuating the signal?

Hi IBMOTO,

                    Can you test the amplifier by itself. Bias it up and verify the dc current is correct. The add a small signal, say, -15 dBm and confirm what the output power is? Need to determine if the amp EVB is defective.

Regards,

Jim B

The LNA amplifier is now working.
But the PA refuses.
When plugged in, it attenuates my signal by 50 dB.
Even when I turn it off, I observe the same attenuation.
So I conclude that the amp does not work.
I do not know why.
However, I send to its input a signal of - 20 dBm.
Also, I checked that the current is flowing well in the amp on pins 1 and 7

help me please

Hi IBMOTO,

                      At this point since the part seems to bias but no output, I recommend contacting the distributor your purchased it through and get an RMA to send it back. Ask them to send a replacement as the board doesn't work.

Regards,

Jim B