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High-frequency systems such as mm-wave radar transmitters and LO/RF chains in vector network analyzers (VNAs) often require the generation of signals with high output power. While these systems benefit considerably from the reduction in size and weight provided by SiGe integration, their output power must be further increased in order to meet the performance of other technologies (e.g. GaAs). To this...
This paper presents the results of initial measurements collected using a compact 60 GHz stepped-frequency continuous-wave (SFCW) imaging radar based on nonlinear transmission lines (NLTLs), and driving a pair of dual-waveguide-fed horn antennas. A range resolution of 2.22 cm is achieved using a bandwidth of over 6.5 GHz, and synthetic focusing is applied to achieve an azimuth resolution of 1 cm with...
Nonlinear transmission lines (NLTL) are integrated with couplers, switches, and amplifiers, resulting in broadband source extensions. It is shown that these extensions possess attractive characteristics such as frequency scalability and quasi-linear power transfer. It is also shown that the large-signal driving-point impedance, and thus the source match of the extension is a strong function of the...
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