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Theory and Design of N -Push BJT Clamping Harmonic Generator for Silicon Terahertz ICs

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2 Author(s)
Park, J.-D. ; Department of Electrical Engineering and Computer Sciences, UC Berkeley, CA, USA ; Niknejad, A. M.

We present a $N$ -push BJT clamping harmonic generator and an optimal operation condition is derived to maximize the desired $N ^{th}$ harmonic component. Under the hard switching condition, harmonic currents are calculated from time domain waveform generated from a simplified BJT model. Output waveform and the harmonic currents match well with Harmonic Balance (HB) simulation. For verification, measurements from a 380 GHz quadrupler with the on-chip patch antenna implemented in 0.13 $mu{rm m}$ SiGe BiCMOS are presented. Optimal biasing point for maximum EIRP corresponds well with the calculated value.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:22 ,  Issue: 12 )