Table 1: The performance comparison of different transformer realizations.

Ref.ConfigurationLp [nH]QpSRF [GHz]

[11]Differential square spiral transformer0.85.2 peak @ 5 GHz10
[12]Interleaved 3 turn square spiral transformer5.325.77 peak @ 2.95 GHz6.2
[13]Interleaved square spiral transformer8.5NA4.9
[14]Differential square spiral transformer5.510 peak @ 1.7 GHzNA
This workStacked transformer, Hilbert , 0.65.95 peak @ 8.4 GHz18.8