I have not determined why the SXB4089Z input matching was out. After lots of maths and component substitution I suspect the mmic itself is damaged. I will swap it out soon to confirm this.
In the meantime I tested an AH101 device. This was made awkward because the test board was set out with matching networks for the AH1, which are quite different. With some hacking I got it to work. Input return loss was initially 17db but I was able to tune that to under 30dB with a little foil gimmick capacitor. Output return loss was 17db. Gain was 13dB.
73's
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