This is our version of the Low Noise Amplifier from Quorvo. We used FR4 as this is budget-friendlier. The revenge is lower gain at higher frequencies. If you need the approx. 10 dB Gain @ 6 GHz, you mayst want to use Rogers™ RO4350B / 0.8 mm as described in UKW berichte 2/2023 (article by Wolfgang Schneider, DJ8ES). As a bias, we used the TCBT-14+ from Mini - Circuits. This is a better choice than any 18 nH / 0603 as it is broadband-isher :-)

The figure below shows, that 1 dB compression is at an input level of approx. 0 dBm. Data measured at 1 GHz. Supply : 10 V, 70 mA

The revenge of using FR4 is clearly seen above 2 GHz. With Rogers™ RO4350B, 19 dB are approachable @ 2GHz.



S21 from 500 kHz to 6 GHz

As most LNA's have a poor matching, so does this. The datasheet specifies a typical value of 12.2 dB (S11) and 13.5 dB (S22).



S11 is acceptable from 100 MHz to 6 GHz



S22 is acceptable from 3 MHz to 6 GHz

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