The layered complex structures of Bi-2(Zn2/3Nb4/3)O-7 (beta-BZN) and BiNbO4 ceramics have been designed by piling-up and cofiring. The adjustable dielectric constants and quality values of complex were obtained. The cofiring of beta-BZN and BiNbO4 ceramics was firstly attempted, and the sintered interface was observed by the scanning electron microscopy (SEM). The measured and calculated dielectric properties results of the layered complex were compared in detail, and have small relative errors at a frequency range of 100 Hz-1 MHz regions and microwave regions. (c) 2007 Elsevier B.V. All rights reserved.