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We have theoretically investigated a novel dual-core microstructured photonic crystal fiber, which consist of two cores and a rectangular lattice cladding.The full-vector the plane wave expansion method is applied to analyze its high birefringence and dispersion.The simulation result shows that negative dispersion slope values in C band and high birefringence (10-2) are obtained.The new structure is compact in size and easy to fabricate, making it promising for miniaturized complex communication devices.