Electronic-based tuning started to appear in the 1960s for two reasons. First, the solid-state variable-capacitance diode (varactor or varicap) was developed and commercialized, significantly ...
Inspired by the realistic interference effects of the shift-frequency and segmented modulations, the proposed method flexibly imposes the subsection-shift-Doppler-frequency modulation on the SAR echo ...
It involves the integration of a varactor to dynamically compensate for fluctuations in the input impedance of the rectifier. The direct biasing of the varactor is strategically achieved through a ...