I am using HMC1044 in one of my application. Using STM32F417 controller to configure HMC1044 through its SPI.
I tried with 1MHz to 20Mhz as SPI clock but not able to configure HMC1044. What is the supported SPI clock frequency ? in data sheet I see its 20ns minimum clock time which is (50MHz) is this true?
And for every band selection I do, Filter behavior is same.
RF behavior with default Band-15:
With the default band-15 configuration I am unable to see the required filter performance.
I am feeding -20dBm as in put level, fed frequencies from 900MHz-4GHz, but filter output is not uniform in pass band, that is at 1.2GHz its giving -50dBm at 2GHz its giving -48dBm.
Variation is not at all linear in the pass band. Can you share its behaviors Gain vs Frequency for different bands.