Mirny microwave synthesiser extension
Mirny is a low-cost wide-band PLL/VCO-based microwave frequency synthesiser.
Like the Urukul DDS Synthesiser but with a VCO/PLL (ADF4355, ADF4356, ADF5355, or ADF5356) as the synthesizer and options for frequency double/tripler and analog frontend mezzanines.
Comparing Mirny to Urukul:
- Much larger frequency range (53 MHz to 13.6 GHz including the mezzanine output for Mirny vs < 1 MHz to 500 MHz in the first Nyquist zone for Urukul)
- Much higher frequency resolution
- Lower jitter and phase noise
- No linear high resolution output amplitude setting (c.f. AD9910 ASF)
- No deterministic phase control, no coherent or absolute phase changes
- Large frequency changes are not "agile" (take a few ms) and do not have high timing resolution, small frequency changes (<10 kHz) can be made rapidly
- RF switch changes or attenuator changes still benefit from high timing resolution through the EEM connector.
Status: hardware prototypes exist, to be funded
- 50 MHz to 4 GHz (maybe 6.8 GHz) on board, 13.6 GHz with mezzanines, more if the mezzanines perform frequency conversion.
- Digital attenuators
- RF switches
- User-defined filters
- CPLD for SPI routing and configuration/status queries