Sub-Nanosecond Greater-Than-10-V Compact Tunable Pulse Generator for Low-Duty-Cycle High-Peak-Power Ultra-Wideband Applications

Figure 3

Measured (symbol) (a) cutoff frequency 𝑓_𝑇 and (b) impulse response of a typical HBT versus that simulated by using the Agilent (dashed curve) and modified (solid curve) HBT model. In (a), 𝑉_CE = 1, 2, 3, and 4 V top down. In (b), the input pulse width and amplitude are 0.2 nanosecond and 1.45 V, respectively. 𝑉_BE = 0. Artificial delays between impulses are added for clarity.

(a)

(b)