Composites consisting of fine, unidirectional ordered piezoelectric fibers in a polymer matrix offer a series of commercially relevant applications. Making use of PZT fibers with diameters in the range of 10-50μm improved functional properties of such 1-3 composites are expected, stimulating the development of advanced ultrasonic transducers. The present paper reports on the preparation of 1-3 composites with different volume fractions of PZT(53/47) fibers and the characterization of their dielectric and piezoelectric properties. The experimental data were compared with results of finite element method modeling and parallel circuit modeling.