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An RF front-end that could handle strong to weak input signals without the need for a low-noise amplifier, for use in a terrestrial wideband TV tuner IC, was designed and its performance was measured. It was found to exhibit >20 dB attenuation at the image frequency by implementing a 6th-order band-pass filter from 90 to 770 MHz with an autotuning function. The measured noise figure at IF output...
A signal detection system using noise statistics processing is proposed. By approaching the problems of low voltage and high noise from miniaturization of a device from a stochastic point of view, a faint-signal receiving system that can effectively detect sub-threshold and noise level signals has been developed. In addition, an alternative to statistical processing is proposed, and would be successfully...
The normalized radar cross section (NRCS) of ocean surface is measured from three directions of illumination by an air-borne dual-frequency synthetic aperture radar (SAR) in the L- and X-bands, and the dependency of the NRCS and the polarization ratio on the relative wind direction is analyzed. In the X-band, the dependencies of the NRCSs in the parallel polarizations are different each other. The...
We present a transformer noise-canceling ultra-wideband (UWB) CMOS LNA based on a common-gate topology. A transformer, composed of an input inductor and shunt peaking inductor, partly cancels the noise originating from a common-gate transistor. The combination of the transformer with an output series inductor provides wideband input impedance matching. The LNA, implemented with 90-nm digital CMOS...
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