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Design of an STM circuit suitable for GHz signal measurements

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Figure

Figure 1.1 shows the noises plotted as a function of frequency, for α = 10 − 3 , I = 1 nA, T = 4.2 K and R = 1 GΩ
Figure 2.3: Transmission line (represented by the cylinder) with a characteristic impedance Z 0 terminated in a load of impedance Z L , both impedances are  pro-vided power by source voltage V s .
Figure 2.4: Reactive elements Z 1 and Z 2 are added to the circuit to match the load impedance to Z 0
Figure 3.1: Influence of the tunnel junction noise on Z STM at 1 GHz.
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