- circuit diagram ( 9k )of this particular 0.5 dB noise figure amplifier
- the dimensions of the cavity and the resonator (12k ) are fairly critical, but otherwise you can use your imagination !
- here you can see the vector error corrected noise figure ( 9k )and associated gain measured with the Anritsu MS4623B
- the associated gain and matching ( 8k ), note horrendous matching and non coincidence with optimum noise figure !!!
- because of the typical poor matching of this type of design, there is a difference between available and insertion gains (7k )
- a more traditional non-vector error corrected SCALAR noise figure measurement shows a higher noise figure !!! ( 7k )
- I am still toying with the idea of coming up with a better matched P-HEMT design ;-)
- maybe even a multistage Peltier cooled LNA ( boosted by an article by Miteq, Inc. in Microwave Journal, April 1999 ).
