Development of a Novel, Compact, Balanced, Micropower Impulse Radar for Nondestructive Applications

Abstract

In this paper, we present a novel development of compact micropower ultrawideband (UWB) radar by integrating ultrashort balanced transmitter, sampling receiver, and antennas into a single package. The developed transmitter produces a pair of Gaussian pulses with 1 MHz of PRF, 400 ps of duration, and 8.3 V for peak-to-peak amplitude. The receiver down-converts microwave signals with a conversion gain of 3 dB over a 4.5-GHz bandwidth. The integrated UWB micropower radar system allows for the short-range detection with high range resolution and accuracy, thus enhance effectively the capability of target detection and classification. The high performances of such radar system for detecting objects are demonstrated through the realfield tests of various target scenes.Index Terms-Micropower impulse radar (MIR), UWB transmitter/receiver, UWB antenna, pulse generation, sample and hold circuit, nondestructive test.

Design of a Low-Cost Ultra-Wide-Band Radar Platform

“…The principal UWB pulse radar consists of a transmitter with a pulse generator, a receiver with a pulse detector, antennas, and a signal processing unit [8]. On the transmitter side, the circuit must be capable of producing sub-nanosecond pulses.…”

Análise temporal da antena espiral equiangular filamentar.

“…Redes de antenas são usadas para radar pulsado UWB (Ultra Wide Band) em ambientes reexivos, como tanques metálicos contendo líquidos [30]. Sistemas completos UWB que utilizam pulsos de 400ps de duração, foram desenvolvidos para Radares de impulso de micropotência (Micropower Impulse Radar), ou seja, radares de baixo custo com uma sensibilidade grande a distâncias bem curtas [25]. Sensores implantáveis para medição de sinais biológicos utilizando IR-UWB (Impulse Radio UWB), utilizando modulação por posição de pulso (Pulse Position Modulation), também ganharam atenção devido ao seu consumo menor de energia e menor necessidade de processamento no front-end [26].…”