ADL9005 NF and Gain data is not matching with data sheet

The first thing I would keep in mind would be to check and re-calibrate your test setup and to clean out RF connectors. Simple things like that can have an effect on RF performance. 

Can you share the gain and NF data across frequency? Curious to see your response over frequency. Are you operating the part outside of nominal DC characteristic? Share the (VDD, IDD) of the part when operating, along with the power level you are using to drive the part?

Measured data as follows:

Frequency(GHz)  NF(dB)  Gain(dB)

14                             4           14.5

15                            4.4         12

16                            4.5         12.5

17                            4.5         12.3

18                             5.1         12.4

VDD as +5V and IDD = 80mA (Measured current at 300 ohm R bias resistor)

RF input power level = -20dBm

Are you using an external DC block (capacitor on the input) and bias tee (on the output)? I would verify whether these external components are within the bandwidth for this part. Also, double check the loss those external components have at those frequencies. We typically recommend Marki Microwave BT2-0040 or any bias-tee equivalent?

I used DC block capacitors as ATC 560L (0.1uF) and piconics conical inductor part CC19T40K240G5-C  (30GHz) as bias tee. I checked with ACG4 biasing option also (+8.5V at ACG4 pin). That condition also same Gain and NF is observed. I used this amplifier is 2 boards. Both the design it is coming as same gain and NF only. What could be the issue?

Not quite sure, how this post got moved, but I do have additional questions for you.

Would you happen to be using a EVAL board for ADL9005 or are you designing your own PCB layout with the ADL9005 IC? If it is the latter, I would recommend testing the input and output traces by terminating it with 50 ohms. Keep in mind you need to desolder the IC to do this test and taking S-parameter after. This should point you in the right direction on whether the IC or the layout is having an effect on the performance.

I am tested with my board only. I removed the IC and checked the input and output return loss. It is <-15dB at my band.

Are you testing on a custom PCB or a EVAL board from ADI? What frequency at you looking at? What is the impedance (zo) for your RF traces? To make sure, you are measuring -15 dB return loss without the IC, correct? It is important to verify if issues state for NF and Gain is stemming from PCB layout or the IC.

Are you testing on a custom PCB or a EVAL board from ADI? What frequency at you looking at? What is the impedance (zo) for your RF traces? To make sure, you are measuring -15 dB return loss without the IC, correct? It is important to verify if issues state for NF and Gain is stemming from PCB layout or the IC.