tony_lth
Advanced Member level 5
I tested a S band (3G) LNA with two stage.
The last stage is a FET( I guess so.), its Vds=4V. Vgs=-0.6V, Id=20mA.
On its case, there is "101" and a dot.
Its gain at 3G is about 17dB, P1dB is about +13dBm.
Who know this FET part number?
And,
The FET source voltage is about 0.6V, and gate link to GND through a bias line. At 3G, for H=1mm FR4, the lamda/4 should be 14.4mm, but the gate bias line is only 7.3mm. Who can explain that?
Thanks.
The last stage is a FET( I guess so.), its Vds=4V. Vgs=-0.6V, Id=20mA.
On its case, there is "101" and a dot.
Its gain at 3G is about 17dB, P1dB is about +13dBm.
Who know this FET part number?
And,
The FET source voltage is about 0.6V, and gate link to GND through a bias line. At 3G, for H=1mm FR4, the lamda/4 should be 14.4mm, but the gate bias line is only 7.3mm. Who can explain that?
Thanks.
