Part Number: LMX2594
Hello!
We work in the weather radar business and use the frequency range 9.3 GHz - 9.5 GHz.
Our radar coherency mainly depends on the phase noise of sythesizers very next to the carrier.
Did somebody measure the phase noise of the LMX2594 at 9 GHz and at smaller offset than 100 Hz?
Can somebody provide data or plots?
We usually compare the 10 Hz offset phase noise.
Thank you in advance!
Best regards,
Jochen
Hi Jochen,
Unless your reference clock is extremely clean, the phase noise between 10Hz to 100Hz will be dominated by the reference clock. We used to use a 100MHz clock from Wenzel. This clock has extremely low phase noise and therefore we are able to measure the 1/f noise of our devices.
in the datasheet, we have a typ. plot at 9GHz, which you can see the 1/f noise at 100Hz offset.
I did an interpolation, the 1/f noise at 10Hz is close to -80dBc/Hz.
