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. 2019 May 29;19(11):2454. doi: 10.3390/s19112454

Figure 1.

Figure 1

The THz research gap in relation to the present [29,31,41,42,43] and forecast [34,35] fmax capability of transistor technologies, estimated current state of transistor modeling [44,45] and packaging [38] and reported achieved frequency operation of some THz circuits [1,42,46,47,48,49,50,51,52].