We are using AD8342 as an up-conversion mixer in a test board we designed. From the measurements of the mixer, it shows insufficient input compression point. Here are few details of interest:
- RF-Input: 700 MHz
- LO Freq: 1700 MHz
- IF-Out: 2.4 GHz
As per the datasheet, the AD8342 should exhibit an Input-P1dB of +8 dBm.
However, from my single-tone measurements, the device is already entering into Compression even at an input level of -11 dBm.
Our input matching network and the output pull-up inductors are similar to the ones described in page 18, High Frequency Applications, Figure 51.
I am attaching the schematic for our application herewith.
Till now, I'm unable to pin point why the Mixer is exhibiting a worse input compression than expected.
Are there any points that are being overlooked here?
I will be pleased over any comments or suggestions.
Many Thanks in Advance!