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We describe a prototype ultrawideband radar. We show how the system was designed and how the hardware was developed for the radar prototype. Waveform generation, radar parameters, and signal processing for the stepped frequency waveform are discussed. The radar operates from 500 MHz to 3 GHz with a nominal resolution of 6 cm in air. The advantage of the stepped frequency approach over an impulse radar...
A method of connecting K identical parallel M bit converters to form a K-M bit converter is presented. By controlling the voltage drop over the resistor string with a current the linearity is made independent of offset voltage between the steps and high ONresistance in the switches. This connection gives DACs with linearity determined by the resistors and with a speed / power ratio of 15MHz/mW. An...
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