The original design has been expanded with an attenuator at the input and output.
With that, the matching is increased and the gain can be set to almost any value.
✈ Hardware Description
This board was designed to upgrade the Si-570 Testboard to a fully synthesizer with - 37 dBm up to + 13 dBm output power. To reach that high output power,
a GALI-51+ was selected. It offers a Gain of 18 dB as well as a maximum Output power of 18 dBm (@ 1dB Compression).
With a typical device current of 65 mA and a typical voltage of 4.5 V, we must get rid of 7.5 V @ 65 mA (as we use a 12 V power supply).
This is done with 6 x 75 Ω.
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